SMITHSONIAN CONTRIBUTIONS TO THE
EARTH SCIENCES
NUMBER 2
PauiA.Mohr Catalog of
Chemical Analyses
of Rocks from the
Intersection of the
African, Gulf of Aden,
and Red Sea
Rift Systems
J S S U E D
OEC16UHJ
SMITHSONIAN INSTITUTION PRESS
CITY OF WASHINGTON
197O
ABSTRACT
Paul A. Mohr, Catalog of Chemical Analyses of Rocks from the Intersection of
the African, Gulf of Aden, and Red Sea Rift Systems. Smithsonian Contributions
to the Earth Sciences, 2, 7-(-[392] pages, 1970.?A compilation is presented of
all published chemical analyses of rocks from the Red Sea, Gulf of Aden, and
Ethiopian rift junction area. The chemical analyses are accompanied by further
computations, in particular weight-norm and Niggli values, and by brief mineral-
ogical descriptions. A full bibliography and indexes are included.
Official publication date is handstamped in a limited number of initial copies and is recorded
in the Institution's annual report, Smithsonian Year.
UNITED STATES GOVERNMENT PRINTING OFFICE
WASHINGTON : 1970
For sale by the Superintendent of Documents, U.S. Government Printing Office
Washington, D.C. 20402 - Price $2.75 (paper cover)
PaulA.Mohr Catalog of
Chemical Analyses
of Rocks from the
Intersection of the
African, Gulf of Aden,
and Red Sea
Rift Systems
Introduction
This compilation lists all rock-analyses known to the
author which refer to the PreCambrian Basement
and the Tertiary-Quaternary volcanics of Ethiopia,
the Somali Republic, Afar and Issa (ex-French So-
maliland), Yemen, South Yemen, and the Red Sea
islands. The region thus comprises the Arabo-Ethi-
opian swell and its complexly developed rift systems.
The Ethiopian region is becoming of particular
interest to those studying the world ridge-rift system,
first because it presents a rift triple-junction (the
Red Sea, Gulf of Aden, and African rift systems meet
at Afar), and second, because die world's largest
alkaline volcanic province is developed at this triple-
junction. For discussions on the spatial, chronological,
and chemical distributions and relationships of these
lavas, the reader is referred to other papers by the
author (1963, 1965, 1968, 1970).
While, with the introduction of rapid, though
less precise, chemical techniques, the number of Ethi-
opian rock analyses is burgeoning, there remains
Paul A. Mohr, Smithsonian Astrophysical Observatory, Cam-
bridge, Massachusetts.
amongst geologists working in Africa a lack of
knowledge of previous geochemical work relevant
to Ethiopia. This is undoubtedly because many of
the earlier published analyses lie in Italian literature
not easily accessible. Even where the reader suspects
analyses to exist, it can prove a time-consuming task
to track down the journal concerned and to obtain
a copy of it.
The author, impressed by the usefulness of various
rock-analysis compilations published by Dr. Marjorie
Hooker of the United States Geological Survey, has
therefore endeavored to produce a similar one for
the Ethiopian field. This compilation has been made
as complete as possible, but omissions and errors are
no doubt present and notification of these will be
gratefully received, as will lists of new analyses due
for publication.
Acknowledgements
Dr. W. G. Melson gave both encouragement and
assistance in bringing this work to the publisher. Dr.
I. L. Gibson suggested several improvements to the
analytical format. The author is most grateful to Mrs.
G. Schrauwen for her efficient typing of the text matter.
SMITHSONIAN CONTRIBUTIONS TO THE EARTH SCIENCES
Format
Each analysis is presented in a fixed format. The
top four lines describe as follows:
line 1. Identification number for this compila-
tion, starting with 101 for Basement rocks
and 1001 for volcanic rocks. Identification
numbers are in chronological order of
publication, and within a given publica-
tion are in order of increasing SiO2 con-
tent.
line 2. Rock-type.
line 3. Coordinates, in degrees and minutes of
arc, of the locality where the specimen
was collected (a blank indicates they are
not known), followed by a place-name
description.
line 4. Author and year of publication (refer-
ees are given in full on pages 3 and 4).
The original rock-names ascribed by the analysts
are generally retained, but in some cases, particu-
larly where "lava" units have since been recognised
as welded tuffs, a modification has been made.
Where it is considered that a rock-name is in need
of radical revision, the suggested alternative follows
in square brackets after the given name. The Italian
term 'liparite' is translated as rhyolite.
All specimen localities are specified, where ever
possible, by latitude and longitude coordinates
taken from the best available maps, but their ac-
curacy cannot always be guaranteed. Some authors
give vague descriptions of localities, while others
give an unreferenced place-name which cannot be
found on any recent map. The unfortunate inade-
quacy of many locality descriptions, especially in
terms of stratigraphical position, derives from the
fact that in many cases the analyst and author was
not the collector of the rock specimen (see Repossi,
1932, p. 296, for comments on some consequences
of this situation).
Following the first four lines of the print-out, the
analytical format is presented in two levels. The
upper level shows the originally published rock
analysis (The value 0.00 signifies "not determined"
unless remark is made to the contrary). To the
right of the rock analysis is a water-C02-free compu-
tation of this analysis, summated to 100.0, and far-
ther to the right are atomic proportions in terms
of weight and numbers.
The lower level of data shows computed CIPW
norms, one based directly on the published analysis
and the second with all Fe203 in the analysis con-
verted to FeO. These weight norms are calculated
as far as LC (leucite), any further silica deficiency
being printed out explicitly as such; similarly with
carbon dioxide in excess of CC (calcite) and phos-
phorus pentoxide in excess of AP (apatite). Niggli
values follow to the right of the norms, and then
some three-component percentages for use in plot-
ting triangular diagrams (where F = total iron;
M = MgO, C = CaO, N = Na20, K = K20). D.I.
stands for differentiation index (FeO -\- Fe203 / MgO
+ FeO + Fe203).
The analytical and computed data are accom-
panied by a paragraph of "remarks" on such factors
as quality and possible errors of the published analy-
sis; by a "mineralogy" paragraph containing a very
brief summary of the given mineralogy of the rock;
and by any pertinent "other information" such as
modal percentages and specific gravity.
Quality of Analyses
It is inevitable in producing a compilation of rock-
analyses from numerous sources that the quality of
analysis will vary considerably. This fact must be
borne in mind, considering the equal treatment
given to all analyses here. Thus the "Remarks" par-
agraph must always be scrutinised when examining
a particular analysis. Some of the older Ethiopian
analyses are of inferior quality; Arsandaux, for ex-
ample, quotes his values to only one decimal place,
and many authors quote "loss on heating" rather
than separate determinations of H20-(-, H20- and
CO2. Loss-on-heating is listed under H20-f- in this
compilation.
Cases where oxide values have been transposed,
or are manifestly incorrect, are noted under "Re-
marks" for the analysis concerned. Of particular note
are the persistently exagerated MnO values in the
analyses of Roman, and suspiciously high ferric/fer-
rous iron ratios in analyses of some early authors.
Several instances of incorrect summations are noted;
in some it is not known whether the error dies in
the summation figure itself, or in one of the oxide
values.
NUMBER 2
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1930. Les Roches Hyperalcalines du Massif du Fantale et
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1970. Tholeiite from the Simien Alkali Basalt Centre,
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Index to Place Names and Rock Types
The numbers in this index refer to analysis list number. The precise place-name of each specimen is not
given here, where the purpose of the index rather requires an easily recognisable town, province or regional
name.
Place Names: Basement Rocks
Eritrea
Adi Kai, 111
Adi Quala, 120
Anseba valley, 106, 107, 112, 115, 118
Asmara, 113, 117, 123
Digsa, 114, 121
Etkokan Mt., 161
Keren, 108, 119
Massawa, 1041
Saganeiti, 105, 109, 110, 116, 122
Socotra Archipelago, 102, 103
Somali, North
Adadle, 101
Darkainle, 162-170
Kandala, 135
Manja Yahan, 134
Somali, South
Bur Akaba, 124, 126, 129, 130
Bur Gulo, 125, 127
Bur Meldak, 128
Malabli, 131
Wollega
Dabus Valley, 136-45
Ghimbi, 148, 149, 155, 156, 158
Sariti (?), 160
Tulu Bottegi (?), 153
Yubdo, 132, 133, 146, 147, 150-152, 154, 157, 159
Place Names: Cainozoic Volcanics
Afar
Alid,1043, 1045, 1049, 1051-1053
Ayelu,1218,1232, 1237
Bio Caboba,1216, 1230, 1231, 1240
Erta-ali, 1268, 1270, 1271, 1273-1277, 1279-1281, 1284, 1286
Fant-ali, 1018, 1019, 1081, 1104, 1108-1113, 1118, 1120, 1121,
1159, 1160
Gar-uli, 1283, 1285
Lake Assali,. 1269, 1278
Lake Julietti, 1058, 1089, 1272, 1282
Miesso, 1020, 1233, 1236
Sardo, 1229, 1239
Aisha horst, 1223
Arussi
Highlands, 1103, 1133, 1135
Chabbi, 1311-1321
Bali, 1129,1131, 1132
Beghemder
Addis Zemen, 1189, 1200, 1201, 1205
Gondar, 1179, 1180, 1185, 1195, 1203
Simien, 1187, 1208, 1209, 1322
Danakil horst
Adaylo, 1061, 1062, 1264-1267
Assab-Beilul, 1001-1003, 1084-1087, 1091, 1221
Baharassoli-Dubbi, 1059, 1060, 1083, 1088, 1090, 1092
Eritrea
Adi Kai, 1050
Adi Ugri, 1046, 1047
Asmara, 1042, 1044
Massawa, 1041
Senafi,1048,1054, 1055
ex-French Somaliland, 1009-1015, 1023, 1024, 1027, 1029, 1030,
1114-1116
Gojjam
Bahar Dar, 1177, 1181, 1188, 1192
Consela, 1190, 1196, 1207
Danghila-Enjabara, 1182, 1183, 1186, 1193, 1197-1199
Lake Tana, 1178
Hararge
Chercher, 1017, 1025, 1031, 1033, 1105-1107, 1152, 1225
Farso, 1151, 1224
Harar, 1213, 1222, 1226
Jildessa, 1032
Ilubabor, 1102, 1103, 1137, 1175, 1176
Kaffa,1136,1154-1157
Red Sea, 1147
Shoa
Adama-Mojjo, 1123, 1134, 1158, 1210, 1234
Addis Ababa, 1117, 1119, 1122, 1124-1128, 1215, 1235
Addis Alem, 1101
Debra Berhan-Debra Sina, 1211, 1217, 1227
Kassam, 1021, 1022, 1026, 1028
Socotra, 1016
Somali, North, 1148
Somali, South, 1056, 1057, 1079, 1080
South Yemen
Aden, 1035-1040, 1262, 1263
J. Khariz, 1287-1308
Tigray
Adua-Axum, 1004-1008
Enda Selassie, 1153
Makalle, 1161-1167
Sokota, 1309, 1310
SMITHSONIAN CONTRIBUTIONS TO THE EARTH SCIENCES
Wallo
Batie, 1212, 1214, 1220
Borkenna,1238
Dessie-Lake Hayk, 1219, 1228, 1241
Utchali, 1242
Wollega
Dabus, 1149, 1150
Didessa, 1098, 1099
Ghimbi, 1168, 1173, 1174
Guder, 1082, 1093, 1094, 1100
Lekemti, 1169
Nejjo, 1170, 1171
Yubdo, 1097, 1172
Yemen
San'a-Hodeida, 1063-1078, 1095, 1096, 1138-1146, 1243-
1245, 1248-1250, 1253
Ta'iz, 1246, 1247, 1251, 1252, 1254-1261
Rock Types: Basement
Adamellite, 117
Amphibolite, 124, 148, 150
Anorthosite, 138, 149
Aplite, 121, 122, 130,131, 134, 160
Birbirite, 133
Diorite, 102, 107, 109-114, 125, 126, 130, 137, 141-143, 151,
152, 154
Dunite, 132, 147
Gabbro, 138, 139, 149, 151
Gneiss, 127, 128, 162-166
Granite, 101, 103, 113, 118-121, 129, 135, 144, 145, 156-159
Keratophyre, 123
Kersantite, 105, 108
Malchite, 115, 116
Nepheline Syenite, 167-170
Porphyry, 102, 123, 161
Pyroxenite, 106, 148
Rhyolite, 156
Schist, 136, 140, 146, 155
Syenite, 153
Teschenite, 1041
Xenolith, 1S7
Rock Types: Cainozoic Volcanics
Andesite, 1266, 1309
Ankaramite, 1014,1063, 1243, 1244, 1269, 1272
Augitite, 1082
Basalt (not distinguished), 1001-1003, 1034, 1067, 1089, 1130,
1133,1151, 1168, 1219, 1226
andesine, 1083, 1268, 1270, 1274-1277
ankaramitic, 1063, 1243, 1269, 1272
aphyric, 1025-1027, 1031, 1084, 1088, 1095, 1144, 1152, 1180,
1185, 1193-1195, 1222-1225, 1322
calcitic, 1085, 1086
hyalo,1177, 1178, 1186, 1188, 1245, 1248
picritic, 1138-1142, 1192
porphyritic,
augite, 1247
augite-olivine, 1056, 1079, 1080, 1094, 1143, 1147, 1148,
1211-1213, 1220
olivine, 1009, 1010, 1042, 1043, 1045, 1086, 1087, 1097,
1098, 1101, 1117, 1125, 1136, 1154, 1162, 1163, 1165,
1166, 1179, 1181, 1184, 1188, 1246, 1246, 1249, 1250,
1264, 1287-1291
plagioclase, 1015, 1028-1030, 1032, 1033, 1035, 1099, 1100,
1182, 1183, 1189-1191, 1196, 1210, 1215-1218, 1221,
1265, 1271, 1273, 1292, 1293, 1310
Bostonite, 1048, 1072, 1172, 1174
quartz-bostonite, 1054, 1055, 1069, 1071
Camptonite, 1044
Comendite, 1023, 1024, 1052, 1060, 1074-1076, 1115, 1128 ,1175,
1234, 1235, 1237-1242, 1259, 1267, 1303, 1306, 1308
riebeckite, 1016
tridymite, 1053
Dacite, 1038, 1051
Dyke, 1044, 1046, 1054, 1055, 1093,1097, 1137, 1161-1163, 1172,
1174,1219,1226,1306, 1322
Grorudite, 1006, 1007, 1254
Hornblendite, 1187
Kenyite, 1093
Kersantite, 1137
Limburgite, 1214
Microgabbro, 1161, 1164, 1294
Microgranite, 1108, 1110, 1144
Microsyenite, 1017, 1293
Nephelinite, 1129, 1132
Obsidian, 1006, 1011, 1012, 1019, 1021, 1052, 1090, 1092, 1109,
1111, 1113, 1123, 1145, 1160, 1202, 1204, 1206, 1207,
1235, 1237, 1239, 1263, 1311-1321
Paisanite, 1008, 1050
Pantellerite, 1018-1022, 1040, 1059, 1073, 1078, 1109, 1112-
1114, 1116, 1120-1124, 1135, 1155-1160, 1233, 1236, 1263,
1282, 1283, 1285, 1311-1321
Phonolite, 1103, 1149, 1150, 1198-1201
Pumice, 1049, 1091
Rhyolite, 1011-1013, 1049, 1077, 1091, 1092, 1145, 1153, 1204-
1209, 1260, 1261, 1284, 1286, 1301, 1304, 1305, 1307
Solvsbergite, 1005, 1105-1107
Teschenite, 1041
Tinguaite, 1004, 1046, 1057, 1131, 1132, 1167
Trachyte, 1039, 1047, 1081, 1090, 1096, 1119, 1173, 1202, 1227-
1229, 1278-1281, 1297, 1298
analcime, 1062
anorthoclase, 1102, 1126, 1127, 1257, 1258
arfvedsonite, 1058
olivine, 1104
quartz, 1176, 1203, 1232, 1254, 1300, 1302
riebeckite, 1255, 1256
sanidine, 1230, 1231
trachyandesite, 1036, 1037, 1061, 1068, 1070, 1170, 1171, 1295,
1296
irachybasalt, 1065, 1066, 1083, 1129, 1134, 1149, 1169, 1197,
1251-1253, 1262
irachydacite, 1038
tuff and agglomerate, 1047, 1128, 1135, 1298
Rock Analyses
101
GRANITE
9.42N 44.40F,
A. BOliMEK-BEDEfc,
ADADLE. h.
1894
SI02
TI02
AL203
FF.2O3
FEOMNU
MGUCAO
NA20
K2O
P2O5
H2O*
H2O-
co<:SO3
CUCL
PB
TOTAL
ORIGINAL
ANALYSIS
73.38
.02
13.67
.30
.BB
0.00
.09
1.17
2.99
6.47
.16
.67
0.00
0.00
.37
.02
.02
.05
0.00
100.26
V.ATER-C02-FREE
(100.0)
74.02
.02
13.79
.30
.89
0.00
.09
1.1b
3.02
6.53
.16
SI
TlAL
Ft3
FE2MN
MGCA
NAK
PH*
H-c
s
0
ATOMS
WEIGHT
34.28
.01
7.23
.21
.66
0.00
.05
.84
2.22
5.37
.07
.01
0.00
0.00
.15
49.04
ATOMS
NUMBERS (100.0)
25.56
.01
5.61
.08
.26
0.00
.05
.44
2.02
2.88
.05
63.06
0
ORAB
AM
NELC
ACNS
DI
kO
HY
OL
VT
hi
ILTI
RU
mtlGHT :.GPM
(1OO.O)
? A . 5 0
U.00
3B.68
^5.59
4.74
0.00
0.00
0.00
0.00
.16
0.00
1.50
0.00
.44
I). 00
.04
0.00
0.00
NON-OXIDATION NORM
(FE2O3 COftvEHTED TO FEO)
28.20
0.00
38.71
25.61
4.75
0.00
0.00
0.00
0.00
.16
0.00
2.20
0.00
0.00
0.00
.04
0.00
0.00
NICiGLl
SIAL
FMC
ALK
KMG
TIP
C/FM
az
420
46.
6.
7.
40.
1.
159
IlM FEI-.H.S =
3-COMPONENT
WT.PERCENTS
F 11.00
9.99
9.9180.10
78.1360.R7
11.01
BASEMENT
No. 101
REMARKS: MnO and ZrO traces, H2O "by difference";
two versions of this analysis are published together, the
second containing 0. 96% CaO and 1. 18-0. 30% FeO.
MINERALOGY: Microgranite. Groundmass: Kaolinised
microcline, orthoclase, plagioclase, quartz; accessory
biotite, muscovite, chlorite, rutile, magnetite, ilmenite,
pyrite, apatite, zircon.
OTHER INFORMATION: Mode: ca. 75% feldspar, 20%
quartz.
No. 102
REMARKS: No separate determination of H O-.
MINERALOGY: Not given.
No. 103
REMARKS: No separate determination of H O-; MnO
trace.
MINERALOGY: Not given.
QUART?-MUSCOvITE LlORITt PORMIYRY
12.12N 52.lbE, ARD-EX-KUFU ISLAND,
A. PEL1KAN, 1902
SOCOTRA ARCHIPELAGO
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
64.10
0.00
15.65
6.66
2.38
0.00
4.40
2.57
1.71
0.00
.85
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.76
k*ATER-cO2-FREE
(100.0)
64.81
0.00
1S.B2
6.73
2.41
o.ooX.46
4.45
2.60
1.73
0.00
51
TI
AL
FL3
FE2
MN
MG
CA
NA
K
P
H*
H-
C
S
ATOMS
WEIGHT
29.95
0.00
8.28
4.66
1.85
0.00
.87
3.14
1.91
1.42
0.00
.01
0.00
0.00
0.00
ATOMS
NUMRERS (100.0
22.92
0
6
1
0
1
1
0
00
60
80
71
00
77
69
78
78
00
0
aOR
AR
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MCJO?KEO
IN FEMlCS =
wfclGHT NORI"1
(100.0)
31.?3
1.56
10.24
22.04
22.13
0.00
0.00
0.00
0.00
0.00
0.00
3.f.3
0.00
7.7B
1.39
0.00
0.00
0.00
0.00
0.00
1.00
NON-OX I DAT I ON NORM
(FE203 CONVEKTED TO FEO)
24.97
1.58
10. 3B
22.33
22.42
0.00
0.00
0.00
0.00
0.00
0.00
18.33
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.25
cALK
K
MG
TI
P
CFM
OZ
17.713.4
.30
.23
0.0
0.00.52
86
3-COMPONENT
WT.PERCENTS
F 61.25
M 9.76
A 29.00
F 51.02
C 74.83
A 24.15
N 79.61
K 19.70
C 50.69
103
RIEBECKITE GRANITE
12.30N 54.00E, SOCOTKA ISLAND,
A. PELIKAN, 1902
INDIAN OCEAN
SIU2
TIU2
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
OklcIilAi.ANALYSIS
7B.49
0.00
9.99
1.94
1.18
0.00
.09
.30
3.74
3.84
0.00
? 72
0.00
0.00
0.00
0.00
0.00
0.00
0.C10
100.29
*ATER-C02-FREE
(100.0)
78.83
0.00
10.03
1.95
1.19
0.00
.09
.30
3.76
3.86
0.00
51
TI
AL
Ft3
FE2
MN
M&
CA
NA
K
P
H-f
H-
C
S
ATOMS
WEIGHT
36.67
0.00
5.29
1.36
.92
0.00
.05
.21
2.77
3.19
0.00
.01
0.00
0.00
0.00
ATOMS
NOMREKS (100.0
27.07
0
4
0
2
1
0
00
06
50
34
00
05
11
50
69
00
0
C1)
OR
A^)
AN
NE
LC
AC
NS
DI
MO
HY
OL
MT
IL
TI
RU
AP
CC
MGO/MGOtFF.O
IN FLMCS =
WLUiHT NORM
(100.0)
41.56
0.00
22.86
30.11
0.00
0.00
0.00
1.55
0.00
1.30
0.00
.56
0.00
2.06
0.00
0.00
0.00
0.00
0.00
0.00
.23
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
40.46
0.00
22.95
30.22
0.00
0.00
0.00
0.00
.41
1.33
0.00
4.63
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.06
MG
TI
p
C/FM
OZ
.05
0.0
0.00
.17
267
3-COMPONENT
WT.PERCENTS
F 28.92
47.46
48.73
TESCHtNITE (POSSIBLY BASOiENT)
15.37N 39.23E, HAMASAT. MASSAKA, ERITREA
E. MANASSL, 1909
SI02
TIO2
AL203
FE2O3FEO
MNOMGU
CAO
NA20K2O
P2O5
H2O*
H2O-
C02SO3
ORIGINAL
ANALYSIS
46.20
.76
16.01
.08
.01
? 16
>.O7
r.09
.50
.04
.51
.31
).00
.21).00
>.00
).00
).00
).00
WATEB-CO2-FREE
(100.0)
47.91
.79
16.60
5.27
7.27
.17
5.26
7.35
6.74
2.12
.53
SITl
ALF?3
Ft2MN
Mo
CANA
KP
H*H-
CS
0
ATOMS
WEIGHT
21.58
.46
8.47
3.55
5.45
.12
3.06
5.07
4.82
1.69
.22
.05
0.00
.06
0.00
46.34
ATOMS
NUMBERS (100.0)
17.51
.22
7.15
1.45
2.23
.05
2.87
2.88
4.78
.99
.16
59.72
0CB
OR
AB
ANNE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
ccMGO/MGO+FEO
IN FEMICS =
hElGHT NORM
(100.0)
0.00
0.00
12.50
20.61
8.70
19.62
0.00
0.00
0.00
18.97
0.00
0.00
8.63
7.64
0.00
1.49
0.00
0.00
1.15
.50
.68
NON-OXlDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.63
14.90
8.79
23.13
0.00
0.00
0.00
19.75
0.00
0.00
17.63
0.00
0.00
1.51
0.00
0.00
1.17
.50
.46
NIGGLl
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
110
22.4
41.4
18.1
18.1
. 1
.4
1.4
.5
.4
-63
3-COHPONENT
WT.PERCENTS
F 47.04
M 19.73
A 33.23
43.61
25.5)1
30. Bl
41.59
13.05
45.36
No. 104
REMARKS: Analcime-natrolite teschenite, from
Hamassa't, Massawa, Eritrea, published in E. Manasse
(1909). See analysis 1041; this rock may belong to the
Cainozoic volcanics.
No. 105
REMARKS: The analyses of Manasse list "loss on
heating, " without separate H~O determinations. MnO and
MINERALOGY: Phenocrysts: Green hornblende, with
katophorite inclusions. Groundmass: Coarse-grained
abundant Mg-rich diopside, frequently rimmed with
hornblende; association of yellow epidote, zoisite and
white mica may have been derived from primitive
feldspar which occurred in minor amount.
OTHER INFORMATION: This rock-type is a local basic
segregation from neighboring quartz-hornblende diorite.
MINERALOGY: Coarsely porphyritic. Phenocrysts:
Kaolinised albite-oligoclase; deeply colored biotite,
sometimes chloritised euhedral, strongly pleochroic
barkevikite, with linearly arranged inclusions of
ilmenite. Groundmass: Abundant pale-green diopside,
plagioclase, biotite, accessory apatite, magnetite,
ilmenite, pyrite; secondary chlorite, calcite, limonite,
leucoxene, yellow epidote, quartz.
No. 106
REMARKS: See under 105.
15.O0N 39.10E,
E. MANASSL. 1909
IDE. KERSANTITE
DERPE vALLEY. SAGAMEITII
SIU2
TI02
AL203
FE203
FEO
MNO
MGO
CAU
NA20
K20
P2U5
H20*
H20-
C02
S03Fesa
TOTAL
OKIOI ,MAL
ANALYSIS
48.06
.39
1i.8O
>.43
J.52
3.00
>.62
3.03
J.37
.04
.44
2.43
0.00
0.00
0,00
.63
0.00
0.00
0.00
100.76
?ATER-C02-FHEE
(100.C)
49.19
.40
17.20
6.58
6.67
0.00
5.75
6.17
5.50
2.09
.45
SITI
AL
FE.3
FE2
MNMb
CA
NAK
P
H+
H-
C
S
ATOMS
WEIGHT
22.45
.23
8.89
4.50
5.07
0.00
3.39
4.31
3.98
1.69
.19
.03
0.00
0.00
0.00
ATOMS
NUMHERS (100.0)
17.91
.11
7.38
1.81
2.04
0.00
3.13
2.41
3.88
.97
.14
0
CB
OR
AB
AN
NE
LCAC
NS
DI
WO
HY
OL
MT
IL
TI
RU
AB
CC
MGO/MGO-fFEO
IN FEMICS =
WEIGHT NORM
(100.01
0.00
0.00
12.37
30.39
16.02
B.78
0.00
0.00
0.00
9.k9
0.00
0.00
.11.45
9.56
0.00
.76
0.00
0.00
.98
0.00
.75
NON-OX I DAT I UN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.52
23.10
16.22
13.05
0.00
0.00
0.00
10.21
0.00
0.00
23.13
0,00
0.00
.77
0.00
0.00
1.00
0.00
.47
115
23.8
45. U
3-COMPONENT
WT.pERCENTs
F 49.85
M 21.63
A 28.52
F 49.07C 22.85
A 28.08
N 39.96K
 15.18C 44.87
106
HORNBLENDE PYROxENITE
16.ION 3B.lttE, &HER PLAIN,
E. MANASSE. 19C9
ANSEijA VALLEY? ERITKhA
SIU2
TI02
AL2O3
FE203
FEO
MNO
MGOCAU
NA20
K2U
P2O5
H2U*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
48.84
1.05
6.30
3.02
5.55
.34
13.69
15.08
2.60
1.08
. .25
1.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.66
WATER-C02-FKEE
(100.0)
48.94
1.05
8.32
3.03
5.56
.34
13.72
15.11
2.61
1.08
.25
SI
TI
ALFt3
FE2MN
Mb
CA
NAK
P
H*
H-C
S
ATOMS
WEIGHT
22.82
.63
4.39
2.11
4.31
.26
8.26
10.78
1.93
.90
.11
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.91
.29
3.59
.84
1.71
.11
7.50
5.93
1.85
.51
.08
0CB
OR
ABAN
NE
LC
AC
NS
DI
MO
HY
QLMT
mIL
TIRU
AP
CC
MGO/MGOtf-EO
IN FEMICS =
WLIGHT NDRM
(100.0)
0,00
0.00
6.41
7.01
7.77
8,16
0.00
0.00
0.00
52.23
0.00
0.00
11. 4R
4.40
0.00
2.00
0,00
0.00
.55
0.00
.87
NON-OX I DAT I ON NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
6.44
3.54
7,81
10.11
0.00
0.00
0.00
53.32
0.00
0,00
16.21
0.00
0.00
2.01
0.00
0.00
.55
0,00
.77
c
ALK
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 33.04
M 52.78
A 14.19
F 31.36C
 55.18A 13.47
N 13.86K
 5.76C 80.38
107
HORNRLENbL uIOFUTt
16.09.1 3B.17E, YAwIT-iHlTA,.,,) vALLtY, RRI&ANT1A, ERITREA
t.MAUASSt, 190",
SI02
TI02
AL2O3
FE2O3
FEO
MNU
MGO
CAO
NA2O
K,?O
P2U5
H2O*
H20-
CO2
S03
TOTAL
OKICI ;*LANALYSIS
51.02
.72
17.81
3.75
6.17
.IB
5.30
8.9fl
i. PI
1.01
.72
1.4R
U.OO
0.00
0.00
0.00
0.00
0.00
0.00
100.95
6.20
.18
5.33
SITl
AL
FE.3
Ffc2
ATOMS
WEIGHT
23.84
.43
9.42
2.62
4.80
ATOMS
NUMBERS (100.0)
0
CR
OS
AB
AN
NELC
AC
NS
DI
WO
HY
OL
MT
H'-I
ILT(I
RU
AP
HEIGHT f.Okh
(100.0)
0.00
0.00
6.01
32.48
2b.62
0.00
0.00
0.00
0.00
9.75
0.00
11.28
3.43
5.48
0.00
1.37
0,00
0.00
1.58
0.00
NON-OX IDAT IUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.06
32.71
28.83
0.00
0.00
0.00
0.00
10.07
0.00
4.24
15.11
0.00
0.00
1.38
0.00
0,00
1.59
0.00
N1GGLI
SIAL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
126
25.9
39.6
23.8
10.7
.1
.4
1.3
.7
? 6
-17
In FEMICS =
3-COMPONENT
WT.pERCENTS
F 49.50
M 26.45
A 24.0>>
F 41.82
C 37.86
A 20.32
N 27.61
K 7.3?
C 65.07
No. 107
REMARKS: See under 105.
MINERALOGY: Medium grained. Groundmass: Fresh
or intensely epidotised andesine-labradorite; hornblende,
with plagioclase inclusions, in contorted and rotated
crystals; uncommon chloritised mica; accessory large
apatite, very rare quartz, ilmenite and leucoxene, all
showing effects of stress; common epidote.
No. 108
REMARKS: See under 105.
MINERALOGY: Very fine-graind, aphyric. Ground-
mass: Albite and slightly altered lepidomelane (both with
euhedral tendency), common apatite, rare anatase,
secondary chlorite, ilmenite, limonite.
OTHER INFORMATION: This rock-type occurs as a
sheet intrusion in granite.
No. 109
REMARKS: See under 105.
MINERALOGY: Phenocrysts: Slightly altered An60 with
rare diopside inclusions, uralitised pyroxene.
Groundmass: Fine-grained andesine-labradorite, colour-
less diopside associated with secondary(?) blue-green
amphibole, fairly common chloritised coloured mica,
abundant magnetite, uncommon ilmenite, apatite, rare
quartz. No alkali feldspar observed, despite high ^O
content in analysis.
OTHER INFORMATION: Sheet intrusion in quartz-
diorite massif.
108
KER5ANTITL
15.26N 38.48E,
E. MANASSE. 1909
HANDELiA, S.E. OF KEREN, ERITREA
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20*
H20-
C02
SOS
TOTAL
ORIGINAL
ANALYSIS
51.26
.76
16.90
6.11
5.32
.15
2.59
2.96
6.86
2.28
1.59
4.07
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1U0.B5
WATER-C02-FREE
(100.0)
52.97
.79
17.46
6.31
5.50
.15
2.68
3.06
7.09
2.36
1.64
SITI
AL
FE3
F?2
MN
MG
CA
NA
K
P
ATOMS
WEIGHT
23.95
8
4
4
1
2
5
1
46
94
27
14
12
56
12
09
89
69
ATOMS
NUMBERS (100.0)
19.04
4
1
.21
.40
.71
.66
.05
.44
.18
.94
.08
.50
Q
CB
OR
AFi
AN
NE
LC
AC
NS
DIwo
HY
OL
MT
HM
ILTI
RU
AP
CC
MGO/MGO+FLO
IN FEMCS =
WEIGHT IMOPM
(100.0)
0.00
1.19
13.95
54.16
5.53
3.22
0.00
0.00
0.00
0.00
0.00
0.00
7.68
9.1R
0.00
1.49
0.00
0.00
3.59
0.00
.69
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
1.21
14.12
47.46
5.60
7.25
0.00
0.00
0.00
0.00
0.00
0.00
19.21
0.00
0.00
1.51
0.00
0.00
3.64
0.00
.32
SI
AL
FMC
ALK
K
MG
TIP
C/FM
149
29.
38.
9.
23.
1.
1.
3-COMPONENT
WT.PERCENTS
F 49.3b
M 11.In
A 39.46
F 48.58
C 12.5a
A 38.84
N 56.69K 18.84
C 24.46
109
PYROXtNE I ICKOblORlTT
16.00U 38.18F:, MAI AbAkTE,
E. MANASSL. 1909
?lOLEhSO. ERITREA
SI 02
TI02
AL2O3
FE2O3
FFO
MNU
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
503
TOTAL
OklGIMAL
ANALYSIS
54.18
.76
15.33
?j.fc5
6.30
0.00
3.28
7.77
3.96
2.32
.72
.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.74
WATER-C02-FKEE
(100.0)
54.03
.76
15.29
5.63
6.28
0.00
3.27
7.75
3.95
2.31
.72
SITI
AL
Ft3
FE2
MN
MG
CA
NA
KP
H*
H-
C
S
ATOMS
WEIGHT
25.31
.46
8.11
3.95
4.90
0.00
1.98
5.55
2.94
1.93
.31
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
19.68
6
1
1
0
1
3
2
1
21
56
55
92
00
78
02
79
08
22
0CB
OR
AS
AN
NELC
ACNS
DI
WO
HY
OLMT
HM
ILTI
RU
AP
CC
MGO/MGO?F?O
IN FEMICS =
WEIGHT NORM
(100.0)
3.51
0.00
13.70
33.49
17.10
0.00
0.00
0.00
0.00
14.06
0.00
6.93
0.00
R.19
0.00
1.44
0.00
0.00
1.57
0.00
.66
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
13.85
33.85
17.29
0.00
0.00
0.00
0.00
14.79
0.00
9.77
7.41
0.00
0.00
1.45
0.00
0.00
1.59
0.00
.36
3-COMPONENT
WT.PERCENTS
F 55.56
M 15.25
A 29.20
F 45.96C 79.88
A 74.15
N 28.19K 16.51
C 55.30
110
PORPHYRITIC HUkN--.LE.NtE -;ICRODl OR I TE
14.10IM 39.04E. AZtO* SAc.AI-it I TI . EKllKEA
E. MArtASSt . 1909
SI02
TIu2
AL2O3
FE2O3
FFu
MNu
MGO
CAu
NA2O
K2O
P2O5
H2-J*
H2U-
CO2
SO3
TOTAL
ORIGIMAL
54.21
.tz15.11
3.94
5.25
0.00
6.42
S.19
3.96
1.91
.14
1.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.93
TEW?C02?FKEE
(lon.o)
.40
.52
.16
.95
.27
.00
.44
.22
.97
.92
.14
SITl
ALFL3
FL2Mft
MbCA
NAK
PH*
H-c
s
ATOMS
rtElGHT
25.33
.31
7.99
2.76
4.08
0.00
3.87
5.85
2.94
1.59
.06
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0
19.57
6
1
1
0
3
3
2
14
43
07
59
00
46
17
77
88
04
0.000.00
11.35
33.fc917.1-3
0.000.00
o.noo.oo
1 7 .120.00
10.142.13
5.750.00
.99
0.00
0.00
.310.00
NON-OX I DAT I ON NORM
(FE2O3 COnVPKTEU TO FEO)
0.00
0.0011.44
33.9517.96
0.00
0.000.00
0.0018.47
0.00
2.89
13.99
0.00
0.00
1.000.00
0.00.31
0.00
.59
3-COMPONtNT
WT.PtRCENTS
F 42.78
M 29.89
A ?7.33
F 39.53
C 15.23
A 25.25
N ?8.17
K 13.58C 58.25
NO. 110
REMARKS: See under 105.
MINERALOGY: Phenocrysts: Large pseudomorphs of
zoisite and white mica after feldspar; zoisite forms the
centre of the crystals, and is more abundant than white
mica forming the periphery, indicating a calcic plagio-
clase. Groundmass: Fine-grained fresh andesine-
labradorite, no alkali feldspar, abundant euhedral Fe-
poor hornblende, uncommon quartz granules, intensely
pleochroic biotite; accessory ilmenite, leucoxene,
haematite, apatite, epidote, zoisite; secondary quartz.
OTHER INFORMATION: Occurs as lenses in schists.
No. Ill
REMARKS: See under 105. TiO2 trace.
MINERALOGY: Reported identical with specimen in
analysis 114.
OTHER INFORMATION: This rock-type cut by aplites.
No. 112
REMARKS: See under 105- TiO2 trace.
MINERALOGY: Coarse-grained. Groundmass: Large
tabular An30-40, pink-green hornblende, rather
uncommon anhedral quartz; accessory apatite, ilmenite,
titanite; secondary epidote, zoisite.
HORNDLENDL-blUTlTE-QuART
14.50N 39.20E. ,
E. MAWASSt. 1909
ADI ..AI. ERITREA
sro2TI02
AL203
FE2O3
FEO
KNO
MGG
CAU
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORId: ALANALYSI!
5o.e?
0.00
18.85
5.05
2.90
.16
2.76
5.45
<t.eo
2.07
.38
1.62
0.00
0.00
0.00
0.00
0.00
0.00
o.oo100.116
wATER-C02-Fi<tE(100.0)
57.260.00
18.99
5.09
2.09
.38
51
TI
AL
FL3
FL2
MN
MG
CA
N?
K
P
H+
H-
cs
ATOMSHEIGHT
26.550.00
9.973.53
2.25
.12
1.663.90
3.561.72
.17
.02
0.000.00
0.00
ATOMSNUMBERS (100.0
20
0
7
1
1
2
3
10
00
94
36
87
05
47
09
33
94
12
wfclGMT fiO^M
(100.0)
5.60
U.OO
12.36
41.02
23.90
U.CJO
0.00
0.00
0.00
.91
0.00
7.97
0.00
7.40
0.00
0.00
0.00
o.co
NON-OX 1 OATI UN NORM
(FE2O3 CONVERTED TO FEO)
.23
0.0012.48
41.42
24.140.00
0.000.00
0.00
.98
0.0019.90
0.000.00
0.000.00
0.000.00
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
170
33.231.4
17.5
17.9.12
.39
0.0
.48
.56
-2
3-COMPONENT
yT.PERCSNTS
F 45.22
M 15.70
A 39.OH
F 39.22
C 26.89
A 33.89
N 36.96
K 16.80
C 44.24
MGU/MGC-t-hFO
IN HEMC5 =
112
HORNBLENDE OUAfcTZ
16.02K 38.1JE,
F. MANASSt, l'V09
5102
TI02
AL-iO3
FE2O3
FEO
MNo
MGO
CAO
NA2O
K2U
P2Q5
H20 +
H20-
COi
S03
TOTAL
OKICJ'Wl
ANALYSI!
57.51
0.0015.88
3.503.71
.17
4.489.16
3.70
1.27
.29
l.?l
0.000.00
0.00
0.00
0.000.00
0.00100.88
HATER-C02-FREE
(100.0)
57.70
o.oo
15.93
3.51
9.19
3.71
SI
TI
AL
Ffc3
FE2
MM
MG
CM
NA
K
P
H-t
H-
C
5
ATOMS
WEIGHT
26.87
0.008.40
2.452.88
.13
2.706.55
2.75
1.05
.13
.01
0.00o.oo
0.00
ATOMSNUMBERS (100.0)
20.56
0.00
6.69
.94
1.11
.05
2.39
3.51
2.57
.58
.09
Q
C1
OR
A^
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H.t
IL
TI
RJ
AP
CC
MfiO/MCiOi-HJU
IN EthlCS -
WtlGHT "10RH(100.0)
7.99
0.00
7.5 5
31.48
23.01
0.00
0.00
0.00
0.00
16.87
0.00
7.38
0.00
5.10
0.00
0.00
0.00
0.00
. t.A
0.00
.7*.
NON-0(FE2O3
4.310.00
7.6031.69
23.160.00
0.000.00
0.00
17.54
0.0015.06
0.000.00
0.000.00
0.000.00
.64
0.00
.54
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
159
25.9
27.2
12. i.
.53
0.0
3-COMPONENT
WT.PERCENTS
F 43.?H
33.7S)
42.92
23.24
26.19
8.99
64.83
HORNBLENDE uRANITt" ar{)t.RJ/_ i..IORITL?
15.37U 38.45E, ,-iAl .|A|_ I -H.AKET. ERITREA
E. MA.NASSL, 1909
SIU2
TIJ2
AL2O3
FF.2O3
FEO
MUG
M3U
CAO
NA2O
K2U
P2U5
H2O?
H2U-
C02
S03
TOTAL
Ar.ALYSI
bH.67
0.00
17.68
2.21
3.R5
0.00
3.28
4.ft2
5.K6
3.27
.57
.49
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.70
WATER-C02-FREE
(100.0)
58.55
0.00
17.64
2.21
3.84
0.00
3.27
4.81
5.B5
3.26.57
SITI
AL
Fh3Ft2
MN
M(j
CANA
KP
Ht
H-c
s
ATOMS
WEIGHT
27.41
0.00
9.35
1.55
2.99
0.00
1.98
3.44
4.35
Z.71
.25.01
0.00o.oo
0.00
ATOMS
NUKBEK5 (100.0)
20.65
07
10
1
14
1
00
34
59
14
00
72
82
00
47
17
0
CHOR
ABAN
NHLC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
ccMGO/MGO+FEO
IN FEKICS =
WEIGHT NORM
(100.0)
0.00
0.00
19.33
49.59
12.1H
0.00
0.00
0.00
0.00
6.84
0.00
.96
b.65
3.21
0.00
0.00
0.00
0.00
1.24
0.00
.67
NON-OXIDATION NORM
(FE203 CONVFHTED TO FfcO)
0.00
0.00
19.41
47.82
12.23
1.07
0.00
0.00
0.00
7.03
0.00
0.00
11.18
0.00
0.00
0.00
0.00
0.00
1.25
0.00
.51
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
KC
32.81
17.76
49.43
30.28
24.09
45.63
42.01
73.44
34.55
No. 113
REMARKS: See under 105. TiO2 trace.
MINERALOGY: Cataclastic structure. Groundmass:
Large fresh An20-25, subordinate microcline (no
orthoclase), rather uncommon quartz, equally common
biotite and hornblende; accessory titanite, large apatite,
rare zircon, epidote, titaniferous magnetite.
OTHER INFORMATION: Basic segregation from granite
massif.
No. 114
REMARKS: See under 105. CO, trace.
MINERALOGY: Groundmass: Large altered oligoclase-
andesine (secondary zoisite, white mica, and rarer
epidote and calcite), very subordinate kaolinised alkali
feldspar, rather uncommon rounded quartz, hornblende
commoner than dark mica, both now chloritised;
accessory apatite, ferro-titanite, leucoxene.
No. 115
REMARKS: See under 105. MnO and CO2 traces.
MINERALOGY: Porphyritic texture, with fluidal
groundmass. Phenocrysts: Altered plagioclase (propor-
tions of zoisite-white mica suggest rather calcic).
Groundmass: Extremely fine-grained fresh K-feldspar.
green hornblende, quartz, apatite very rare ilmenite
with leucoxene rims; secondary epidote, calcite,
muscovite, chlorite, titanite.
OTHER INFORMATION: Occurs within a hornblende-
diorite massif.
HORNBLENDt-BlOTITt-QuART7 nIORITt
14.42N 38.54E. ADI ;;ARI;], N.E. OF DIGSA.
E. MANASSE, 1909
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGO
CAONA20
K20
P2O5
H20+
H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
58.67
.19
16.21
4.17
3.54
.15
3.19
6.29
5.09
1.89
.25
1.29
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.93
k?ATER-C02-FKEE
(100.0)
5S.66
.19
16.27
4.19
3.55
.15
3.20
6.31
5.11
1.90
.25
SiTl
ALFt3
Ft2MN
MOCA
NAK
P
H*
H-C
s
ATOMS
WEIGHT
27.41
.11
8.58
2.92
2.75
.12
1.92
4.50
3.78
1.57
.11
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.91
.05
6.81
1.12
1.06
? 05
1.70
2.40
3.52
.86
.08
0
C3OR
ABAN
NELC
AC
NSDI
WOHY
OLMT
HM
IITl
RU
APCC
MGd/MGO-ff-EU
IU FEt-;ICS -
WEIGHT flOHM
(100.0)
5.72
0.00
11.24
43.32
15.80
0.00
0.00
0.00
0.00
11.35
0.00
5.58
0.00
6.0K
0.00
.36
0.00
0.00
.55
0.00
.7(1
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
1.31
0.00
11.33
43.67
15.93
0.00
0.00
0.00
0.00
11.96
0.00
14.88
0.00
0.00
0.00
.36
0.00
0.00
.55
0.00
.45
c
ALK
3-COMPONENT
WT.PERCENTS
F 43.1?
M 17.84
A 39.04
F 36,75
C 29.98
A 33.27
N 38.36K 14.24
C 47.40
115
/?ALCHITE
16.0914 38.1&E,
E. MANASSt. 1909
S. BURI.ER ,,HLR ,-LAlN, ANSEyA VALLEY, ERITREA
SI02
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K2O
P2O5
H2O+
H2O-
C02S03
TOTAL
ANALYSIS
60.96
.45
16.24
2.50
3.52
0.00
2.69
5.77
5.13
2.48
.09
1.10
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.93
cATEK-C02-FKtE
(100.0)
61.06
.45
16.27
2.50
3.53
0.00
2.69
5.78
5.14
2.48
.09
SITl
ALFE3
FE2MN
MCJ
CA
NAK
P
H+
H-c
s
ATOMS
WEIGHT
28.48
.27
8.59
1.75
2.74
0.00
1.62
4.12
3.81
2.06
.04
.01
0.00
0.00
0.00
ATUMS
NUMBERS (100.0)
21.55
.12
6.77
.67
1.04
0.00
1.42
2.19
3.52
1.12
.03
0
C3OR
ABAN
NELC
ACNS
DIMO
HY
OLMT
HM
ILTl
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
6.72
0.00
14.72
43.58
13.93
0.00
0.00
0.00
0.00
11.60
0.00
4.77
0.00
3.64
0.00
.86
0.00
0.00
.20
0.00
.71
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
4.09
0.00
14.79
43.79
13.99
0.00
0.00
0.00
0.00
12.02
0.00
10.26
0.00
0.00
0.00
.86
0.00
0.00
.20
0.00
.48
SIAL
FM
CALK
195
30.7
28.4
19.9
21.1
3-COMPONENT
WT.PERCENTS
F 36.89
M 16.48
A 46.63
F 31.03
C 29.74
A 39.23
N 38.34K 18.54
C 43.1?
116
MALCH1TE
14.42N 39.0bE. AMtiA KEFUD, SAGANEITI, ERITKEA
E. MANASSL. 1909
S102
TI02
AL203
FE2O3
FEOMNO
MGO
CAONA2O
K2O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
0CB
OR
AnAN
NELC
ACNS
Dl
WOHY
OLt?T
HM
ILTI
PL.1
AP
ccMGO/MGO*nO
IN FEMICS =
Oi161 NALANALYSIS
6
1
.90
J.OO
r.2o
.90
.71
j.oo
>.B2
?.44
i.e?
>.9O
J.OO
.89
).00
.92
J.OO
J.OO
j.oo
? 00
J.OO
101.50
HEIGHT MOPM
(100.0)
15.88
1.63
17.43
32.86
16.48
o.oo0.00
0.00
0.00
0.00
0.00
lO.f-0
0.00
2.80
0.00
0.00
0.00
0.00
0.00
2.13
.73
wATER-C02-FKtE
(100.0)
63.36
0.00
17.61
1.94
2.77
0.00
2.89
4.54
3.91
2.97
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
13. 89
1.84
17.49
32.98
16.54
0.00
0.00
0.00
0.00
0.00
0.00
15.12
0.00
0.00
0.00
0,00
0,00
0,00
0.00
2.14
.54
SITI
ALFE3
Ft2MN
MG
CANA
KP
H*H-
CS
0
ATOMS
?ElGhT
28.92
0.00
9.10
1.33
2.11
0.00
1.70
3.17
2.83
2.41
0.00
.03
0.00
.25
0.00
49.64
NIGGLI
SI
1
^L"M
kLK
1GI
./FM
oz
ATOMS
NUMBERS
22.16
0.00
7.26
.51
.fil
0.00
1.51
1.70
2.65
1.33
0.00
62.07
21835.
27.
16.19.
0.
0.
33
53
0
00
60
39
(100.0)
3-COMPONENT
WT.PERCENTS
F 32.56
M 9.93
A 47.49
F 29.?3
cA '
NK
C
8.15
.2.61
4.23
>5.99
19.7B
D.I. 62.0>>
No. 116
REMARKS: See under 105. TiCu, MnO, P2?s traces;
rather weathered specimen
MINERALOGY: Phenocrysts: scarce chloritised
amphibole and altered oligoclase. Groundmass: Domi-
nantly sodic plagioclase microlites; some quartz, K-
feldspar(?); secondary zoisite, calcite, muscovite,
magnetite.
No. 117
REMARKS: See under 105. MnO trace.
MINERALOGY: Granophyric texture. Phenocrysts:
Rather uncommon orthoclase (cryptoperthite), irregularly
distributed quartz grains. Groundmass: Micropegmatitic
intergrowth of quartz and orthoclase in equal proportions,
some slightly kaolinised albite with accreted orthoclase
rims, chlorite laths (after mica?); accessory apatite,
zircon; secondary abundant yellow epidote, some calcite,
leucoxene.
OTHER INFORMATION: Associated with aplite 121.
No. 118
REMARKS: See. under 105.
MINERALOGY: Phenocrysts: Corroded quartz (rare
euhedral crystals), less corroded An20-25, coloured
mica (with primary chloritisation) in proximity to quartz
phenocrysts. Groundmass: Very fine-grained
granophyric quartz and kaolinised alkali feldspar; sub-
ordinate chloritised mica and magnetite; secondary
epidote, muscovite, quartz.
OTHER INFORMATION: Sheet intrusion in Aratu granite.
117
ADA^ELLITt
15.17N 39.20E,
E. MANASSE, 1909
ADI SAtLI, SHA;,EL>I-ALlGHEDI CONFLUENCE, ERITREA
5102
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
70.04
0.00
15.91
1.41
1.79
0.00
.42
1.24
5.44
3.62
.11
.96
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.94
WATER-C02-FREE
(100.0)
70.05
0.00
15.91
1.41
1.79
0.00
.42
1.24
5.44
3.62
.11
SITl
AL
Ft3FE2
MNMG
CANA
KP
H*H-
C
5
ATOMS
WEIGHT
32.72
0.00
8.42
.99
1.39
0.00
.25
.89
4.04
3.00
.05
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.16
0.00
6.47
.37
.52
0.00
.22
.46
3.64
1.59
.03
Q
CBOR
ABAN
NE
LCAC
NS01
woHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGU*FEO
IN FEMICS =
*E1GHT NORM
(100.0)
20.40
.99
21.46
46.16
5.52
0.00
0.00
0.00
0.00
0.00
0.00
3.18
0.00
2.05
0.00
0.00
0.00
0.00
..24
0.00
.39
NON-OX IOAT ION NORM
(FE203 CONVERTED TO FEO)
18.96
1.00
21.52
46.29
5.54
0.00
0.00
0.00
0.00
0.00
0.00
6.46
0.00
0.00
0.00
0.00
0.00
0.00
.24
0.00
.20
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
325
43.6
14. H
6.2
35.3
.30
.20
0.0
.22
.42
84
3-COMPONENT
WT.PERCENTS
F 25.24
23.70
9.19
67.11
52.82
35.15
12.0*
16.00N 38.1BE,
E. MANASSE.. 1909
MAI A&ARTE, ARATU. MOLEBSO, ERITREA
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S(53
TOTAL
ORIGINAl
ANALYSIS
73.56
0.00
14.06
1.02
.77
0.00
? 46
2.14
5.08
3.00
.09
.75
0.00
0.00
0.00
0.00
0.00
O.OO
0.00
100.93
WATER-C02-FREE
73.43
0.00
14.03
1.02
.77
0.00
.46
2.14
5.07
2.99
.09
(100.0)
SITl
AL
FE3FE2
MNMG
CA
NAK
P
H*
H-C
S
ATOMS
?EIGHT
34.37
0.00
7.44
.71
.60
0.00
.28
1.53
3.77
2.49
.04
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.16
0.00
5.67
.26
.22
0.00
.23
.78
3.37
1.31
.03
0
C8OR
A?
ANNE
LCAC
NS
DIWO
HY
OLf?T
H?IL
TIRU
APCC
MGO/MGO*H:.O
IN FEMICS r
WEIGHT NORM
(100.0)
27.76
0.00
17.75
43.02
6.63
0.00
0.00
0.00
0.00
2.81
0.00
.36
0.00
1.48
0.00
0.00
0.00
0.00
.?0
0.00
.72
NON-OX I DATI ON NORM
(FE2O3 CONVERTED TO FEO)
26.73
0.00
17.78
43.11
6.64
0.00
0.00
0.00
0.00
2.97
0.00
2.57
0.00
0.00
0.00
0.00
0.00
0.00
.20
0.00
.34
SIAL
FMC
ALKK
MGTI
P
C/FM
UZ
376
42.4
10.8
11. a
35.1
.28
.33
0.0
.20
1.09
136
3-COMPONENT
WT.PERCENTS
F 17.33
M 4.45
A 78.22
F 14.90
C 17.82
A 67.2R
N 49.71
K 29.35C 20.94
119
PIOTITE uhANlTfc
15.46N 36.27E, CO|. OF v EKFN FORT, ERITREA
E. MANASSL, 1909
SI02
TI02
AL2O3
FF2O3
FEO
MNO
MGU
CAO
NA2O
K2O
P2O5
H2U*
H2Q-
C02
S03
TOI AL
ANALYSIS
73.96
0.00
13.75
? b2
.99
0.00
.48
1.90
5.62
2.55
.17
.250.00
0.00
o.co0.00
0.00
0.00
0.00
100.19
TER-C02-Fi<tE
(100.0)
.00
.00
? 76
.52
.99
.00
.48
.90
.62
.55
.17
SI
TlAL
Ft3
Ft2
MN
MG
CA
NA<
P
Ht
H-C
S
ATOMS
WEIGHT
34.55
0.00
7.28
.36
.77
0.00
.29
1.36
4.17
2.12
.07
.00
0.00
0.00
0.00
ATOMS
NUMHERS (100.0
25.28
0.00
5.54
.13
.28
0.00
.24
.70
3.73
1.11
.05
0CB
OR
ABAN
NE
LC
AC
N5
PIWO
HYOL
MT
HM
IL
TIRU
AP
CC
MQO/MC,O*FL:O
I ft FtMCS s
wElLHT NORM
(100.0)
27.18
0.00
15.12
47.71
4.70
0.00
0.00
0.00
0.00
3.13
0.00
1.04
0.00
.76
0.00
0.00
0.00
0.00
.37
0.00
.53
NON-OXIOATION NORM NI
(FE203 CONVERTED TO FEO)
26.65 SI
0.00 AL
15.14 f
47.76 (
4.70 /
0.00 H
0.00 !*
0.00 1
0.00 F
3.19 C
y
?L
1G
I
./0.00 OZ
2.18
0.00
0.00
0.00
o.oo0.00
0.00
.37
0.00
.38
3-COMPONFNT
WT.PEHCENTS
F 14.86
M 4.72
A HO.41
t 13.04
C 16.41
A 70.55
N 55.81
K 25.32
C 18.H7
No. 119
REMARKS: See under 105, except that H,O is listed as
such for 119. TiO, trace.
MINERALOGY: Medium grained. Groundmass: Micro-
cline, with very subordinate orthoclase, abundant sub-
hedral, zoned albite-oligoclase (fresh, with inclusions
apatite, biotite, hornblende, quartz, microcline); quartz,
with undulose extinction (inclusions of apatite, zircon);
chloritised and epidotised biotite. Accessory fresh
muscovite; orthite with mantle of clinozoisite passing out
to rim of epidote; titanite, both secondary in biotite and
primary; apatite (two generations). Secondary epidote,
ilmenite and leucoxene.
No. 120
REMARKS: See under 105. No separate determination of
FeO; P2?5 trace.
MINERALOGY: Fine-grained leuco-granite. Groundmass:
Fresh microcline dominant over zoned(?) albite-
oligoclase, subordinate quartz (liquid inclusions), scarce
muscovite; accessory altered biotite, titanite, apatite,
zircon.
OTHER INFORMATION: Extensive intrusion underlying
the Mesozoic sandstones.
No. 121
REMARKS: See under 105. p2?5 and CO2 traces-
MINERALOGY: Very fine-grained. Groundmass:
Cryptoperthite and chloritised mica occur separated
from quartzitic-textured quartz (rose-coloured); sub-
ordinate albite; secondary epidote, titaniferous magnetite,
calcite.
OTHER INFORMATION: Associated with adamellite 117,
and is the most silicic facies of a huge granodiorite
massif.
120
MUSCOVITE GKANITF
14.33N 38.46E, ADI ENFN ADI rjUALA,
E. MAnlASSt, 19C9
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H20-
CO2
SO3
TOTAL
ANALYSIS
74.19
0.00
13.55
? 46
0.00
0.00
? 28
.94
5.68
4.82
0.00
.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.32
WATER-C02-FREE
(100.0)
74.25
0.00
13.56
.46
SITl
ALFt3
FE2MN
Mo
CAMA
KP
H*H-
Cs
ATOMS
WEIGHT
34.66
0.00
7.17
.32
0.00
0.00
.17
.67
4.21
4.00
0.00
.00
0.00
0.00
0.00
ATOMS
NUMHERS (100.0)
25.39
0.00
5.47
.12
0.00
0.00
.14
.34
3.77
2.11
0.00
0
CB
OR
At!
AN
NE
LCAC
NSDI
WO
HY
OL
MTHM
ILTI
RU"
AP
CC
MGO/MGO + I-LO
IN FtMCS =
WEIGHT fiOHM
(100.0)
2 3.66
0.00
28.59
42.86
O.CJO
0.00
0.00
1.34
.90
1.51
1.14
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
23.89
0.00
28.62
42.90
0.00
0.00
0.00
0.00
1.25
2.80
.54
0.00
0.00
0.00
0.00
0.00
0,00
0.00
0.00
0.00
.57
TI
/FM
0.0
0.00
3-COMPONENT
WT.PERCENTS
F 4.09
M 2.49
A 93.42
F 3.87
49.65
42. 13
8.22
121
APLIT1C GRANITE
14.58N 39.14E,
F. MANASSt, 1909
DlGSA, E.RITRL.A
SI02
TI02
AL2O3
FE2O3
FFO
MNO
MGO
CAO
NA20
K2C
P2O5
H20 +
H20-
C02
S03
TOTAL
URIC I ./>
AhALYal
74.36
0.00
13.56
.67
1.19
0.00
.29
.89
4.51
4.93
0.00
1.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.41
*ATER-C02-FKEE
(100.0)
74.06
0.00
13.51
.67
1.19
0.00
.29
.89
4.49
4.91
0.00
51Tl
AL
FE3FE2
MNMG
CA
NA
H?
ATOMS
HEIGHT
34.74
0.00
7.17
.47
.92
0.00
.17
.64
3.35
4.09
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.48
0.00
5.48
.17
? 34
0.00
.15
.33
3.00
2.16
0.00
0
CBOR
ABAN
NE
LCAC
NSDI
woHY
OLMT
H*IL
TIRU
AP
CCMGO/MGOtFEO
IN FEMICS =
HEIGHT NORM
(100.0)
26.39
0.00
29.10
38.11
2.11
0.00
0.00
0.00
0.00
1.95
o.oo1.36
0.00
.97
0.00
0.00
0.00
0.00
0.00
0.00
.37
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
25.72
0.00
29.14
3R.16
2.12
0.00
0.00
0.00
0.00
1.99
o.oo2.87
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.23
SIAL
FMc
ALK.
<
MGTl
P
C/FM
OZ
403
43.4
10.5
5.2
40.9
.42
.22
0.0
o.oo.49
140
3-COMPONENT
WT.PERCENTS
F 16.05
M 2.50
A R1.45
F 15.2ftC 7.30
A 77.44
N 43.66
K 47.73
C 8.62
122
APLITL
15.00N 39.12E, b. OF J.
F. MA,<AS5L. 1909
SIo2
TIU2
AL^03
FE2O3
FFO
MNO
MGO
CAO
NA2O
<2u
P2U5
H7u*
H2O-
CO2
SO3
TOTAL
AflALYSI
77.39
0.00
13.16
? f 1
0.00
0.00
0.00
.75
3.1,1)
4.3?
0.00
? 70
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.73
AATER?CO??FrtEE
(100.0)
77.370.00
13.16
.81
0.000.00
0.00
.75
3.604.32
0.00
SI
TI
AL
Ft 3
Ft2
MN
Mi
CA
NA
<p
H?
h-
C
5
ATOMS
HEIGHT
36
0
6
0
0
0
2
3
0
0
0
0
16
00
.96
57
00
00
00
54
67
59
00
01
00
00
00
ATOMS
NIMHERS (100.0
26.410.00
5.29
.71
0.000.00
0.00
.27
2.381.88
0.00
0
CH
OS
AR
AS
NE
LC
AC
NS
DI
WO
HY
OL
i?T
Hi
IL
TI
RJ
Ac-
er.
vGU/t-iGO + l LJ
I* Ftl ICS =
/.OICJHT MOIIi
(100.0)
36.15
1.17
2b.hO
30.54
3.73
0.00
0.00
0.00
0.00
0.00
i).no
O.PO
0.00
0.00
? f.l
0.00
o.co0.00
0.00
O.OO
0.00
NON-OX I DAT I UN NORM
(FE?03 CONVFKTFD TO FEO)
37.66
1.17
25.64
30.59
3.74
0.00
0.00
0.00
0.00
0.00
0.00
1.21
0.00
0.00
0.00
0.00
0.00
0.00
0.00
o.oo
o.oo
NIGGLI
SI
AL
FM
c
ALK
K
MG
TI
P
C/FM
Q7
501
50.i
4.
5.
40.
0.
0.
0.
1.
0
44
00
00
i?
?39
3-COMPONFNT
wT.PEkCENTS
F
M
A
F
C
A
N
K
C
D.I.
9.780.00
90.72
8.
7.*
R3.
41."
49. f
B.t
4
)|
>4
>?
>*>
100.00
No. 122
REMARKS: See under 105. No separate determination of
FeO; MgO and P2?5 traces-
MINERALOGY: Very fine-grained, rose coloured rock.
Groundmass: Granophyric aggregate of feldspar and sub-
ordinate quartz; altered microcline is dominant over
orthoclase and fresher albite; scarce muscovite; acces-
sory apatite, pyrite.
No. 123
REMARKS: See under 105. P2?5 trace-
MINERALOGY: Phenocrysts: Large corroded quartz
(with undulose extinction, rare liquid inclusions),
kaolinised albite. Groundmass: Quartz with fluidal
arrangement of albite(?) microlites; accessory white
mica, pleochroic chlorite, very minute magnetite;
secondary epidote, zoisite, ilmenite, leucoxene, limonite.
OTHER INFORMATION: This rock-type passes into
metamorphosed and kaolinised porphyroid rock, which has
been incompletely analysed as follows: SiO, 81.29%,
A12O3 11. 59%, total Fe2O3 0. 39%, MgO 0. 26%,
CaO 0. 15%, total alkalis 0. 28%, loss on heating 5. 87%,
total 99.83%.
No. 124
REMARKS: See under 105. P2O trace.
MINERALOGY: Groundmass: Large pleochroic horn-
blende crystals with inclusions of feldspar and quartz;
modest aggregates of altered andesine and subordinate
quartz; accessory mica, secondary magnetite, rare
apatite.
OTHER INFORMATION: The extreme melanocratic
facies of a dioritic magma.
123
POHPHYRITlc uUPI<T
15.10ii 38.54c.
E. MAUASSL, 1909
Kf HA Tof' ,Yi'i
MAPAIAI.O, S. 01 ASMARA, ERITREA
SIU2
TI02
AL2O3
FF.2O3
FEUMNJ
MGOCAO
NA2O
K2O
P2J5
H2U*
H2O-
C02
SO3
TOTAL
ANALYSIS
77.fc3
0.00
10.79
2.35
1.16
0.00
.33
.19
5.61
.F8
0.00
? 67
0.00
O.CO
o.oo
o.oo
0.00
0.00
o.oo
99.H
7S.D1
0.00
10.8b
0.00
.33
.19
SITl
AL
Ft3FE2
MNMG
CANA
-f*
-i-
ATOMS
(.EIGHT
36.36
0.00
5.71
1.64
.90
0.00
.20
.14
4.1b
.73
0.00
.01
0.00
0.00
0.00
ATOMS
NUi'ihERS (100.0
26.72
0.00
4.37
.61
.33o.oo
.17
.07
3.74
.39
0.00
0CT
ORAR
ANNE
LC
ACNS
DI
WO
HYOL
MT
H'l
IITI
RU
A?CC
MGO/MGC.fEU
IU FEhlCS =
HEIGHT HCPM
<100.0)
41.06
.24
5.26
4B.01
.95
o.oo
o.oo
0.00
o.oo
0.00
o.oo
1.02
0.00
3.45
0.00
O.OO
0.00
0.00
0.00
0.00
.85
NOU-OXlDATIOIs NORM
(FE2O3 CONVF.HTEO TO FEO)
38.73
.25
5.29
48.23
.96
0.00
0.00
0.00
0.00
0.00
0.00
6.55
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.16
SIAL
FMc
AL<K
MGTI
P
492
40.2
20.5
1.3
38. 0
.09
.15
0.0
0.00
3-COKPONENT
wT.PERCENTS
F 33.98
M 3.19
A 62.B3
34.45
1.86
63.69
83.98
13.17
2.84
124
HORNHLENDlTL
2.49U 44.05E,
F. MAnASSt. 1917
OF I:?> A?AbA, SOMALIA
SI02
TI02
AL2O3
FE203
FFO
MNO
MOO
CAO
NA20
K20
P?U5
H?U*
H2U-
CO2
snj
4?. 9H
.96
10. K4
2.20
1O.?H
.45
12.66
11.OP
2.30
? 69
O.( 0
1.11
0.00
0.00
0.00
*ATtR-C02-FHFE
*.B
10
2
10
12
11
2
.25
.97
.90
.21
.34
? 45
.73
.14
.31
(100.0)
SITI
AL
Ft3
Kt2
MN
Mu
CANA
K
P
H +
H-
C
S
ATOMS
WEIGHT
22.42
.58
5.74
1.54
7.99
.35
7.64
7.92
1.71
.57
0.00
.01
0.00
0.00
0.00
ATOMS
NUHhERS I10U.0)
17.78
.27
4.73
.61
3.19
.14
7.00
4.40
1.65
.33
0.00
0
CT
00
AHAM
NELC
ACNS
DIwo
HY
CL
MT
H?
ILTI
PJAr>
CC.
MGO/.ICiCn-i G
11^ FLivRS =
k.LlCHT I.C'-.t'
(100.0)
0.00
0.00
H.ll
17.38
17. 7fl
1.20
0.00
0.00
0.00
30.PS
0.00
0.00
24.09
3.21
0.00
1.P3
0.00
0.00
U.00
o.oo
.7?
NON-0XIDATIUN NOkM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.13
14.90
17.36
2.59
0.00
0.00
0.00
31.27
0.00
0.00
27.92
0.00
0.00
1.84
0.00
0.00
0.00
0.00
.66
o.uo
.40
3-COMPONE.NT
WT.PERCENTS
F 44.37
M 45.01
A 10.63
F 47.01
C 41.73
A 11.?6
125
H0RNRLENUE-,iEUtr4?LKGITE !,IGRITt
2.50H 44.26E. uiUF* (,ULO. S. SOMALI
T. MANASSL, 1917
3>IO2
TIU2
AL2O3
FE2O3
FEO
MMO
MGO
CAu
NA2O
<2J
P2J5H2U*
H2O-
CO2
SO3
TOTAL
OHldl'tWAhALYSii
46.741.11
14.111.66
8.34
.23
6.7316.04
3.01
.75
.06
.(.0
0.00
U.OO
0.00
0.00
0.00
0.00
0.00
101.38
wATER-C02-FkEE(100.0)
48.361.10
14.001.65
8.28
.23
6.6815.92
2.99.74
? Ofc
SITI
AL
FE3
Ft2
MN
Mb
CA
NA
K.
PH*
H-
C
S
0
ATOMSHEIGHT
22.77
.67
7.471.16
6.48.18
4.0611.46
2.23
.62
.03
.01
0.000.00
0.00
44.24
ATOhSNUMBEKS (100.0
17.87
6
2
3
6
2
31
10
46
56
07
68
30
14
35
02
60.1%
0
CBOR
AnAN
NE
LCAC
NSDI
woHY
OLMT
H"lIL
TI
Kll
AP
CC
MGU/MGG+FEU
IN FEMICS =
WEIGHT f:OHM(100.0)
0.000.00
4.41
6.4222.56
9.15
0.00U.OO
0.0046.07
0.000.00
4.782.39
0.002.09
0.000.00
.13
U.OO
.64
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
0.00
0.00
4.42
6.5522.63
10.210.00
0.00
0.00
46.62
0.00
0.007.35
0.000.00
2.100.00
0.00.13
0.00
3-COMPONENT
WT.PERCENTS
F 48.80
M 32.85
A 18.35
33.56
53.83
12.62
15.203.7S
81.01
No. 125 microcline; uncommon quartz, with undulose extinction;
common biotite and ferric-poor hornblende, in contortedREMARKS: See under 105.
MINERALiOGY: Rather fine-grained. Groundmass: Fresh, crystals; accessory ilmenite and leucoxene, titanite,
zoned labradorite-andesine; occasional crystals bytownite; apatite, zircon; secondary muscovite.
green-brown hornblende, of earlier generation than clear-
green hedenbergite; accessory titanite, epidote, apatite,
magnetite; no quartz nor alkali feldspar.
No. 126
REMARKS: See under 105.
MINERALOGY: Panidiomorphic; some lamination
developed. Groundmass: Rather large, prismatic
amphibole; pleochroism differs from hornblende in being
yellow-green ? intense green-brown ? dark green.
Somewhat altered oligoclase-andesine; no alkali feldspar;
minor quartz; accessory apatite, magnetite, limonite.
No. 127
REMARKS: See under 105. MnO trace.
MINERALOGY: Cataclastic structure. Groundmass:
Albite-oligoclase, commoner than antiperthite (with
myrmekite) showing undulose extinction, rare xenoblastic
126
AMPHlbOLE DiOKITt"
2.49W 44.05E.
E. MANASSE. 1917
AkAfaA, S. 5OHALI
5102
TI02
AL2O3
FE203
FEUKNU
MGO
CAQ
NA20
K20
P2O5
H20*
H20-
C02
503
TOTAL
ORIGINALANALYSIS
51.7R
.82
17.28
2.29
8.b6
.43
4.13
9.32
3.67
1.17
.06
.78
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.59
WATER-C02-FKEE
(100.0)
51.88 SI
TlAL
FL3FE2
MNMt>
CANA
KP
Ht
H-C
S
ATOMS
XEIGHT
24.19
.49
9.14
1.60
6.89
.33
2.49
6.66
2.72
.97
.03
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.93
.23
7.44
.63
2.71
.13
2.25
3.65
2.60
.55
.02
Qcn
ORA8
AN
NELC
ACNS
DI
WOHY
OLMT
ILTI
RU
AP
CC
MCjG/MGOthCO
wtlGHT HOUK
(1OO.O)
0.00
0.00
6.94
31.17
27.23
0.00
0.00
0.00
0.00
15.75
0.00
6.85
7.03
3.33
0.00
1.56
U.00
0.00
.13
0.00
NON-OXIDATION NORM
(KE203 CONVERTED TO FEO)
0.00
0.00
6.97
31.31
27.35
o.oo0.00
0.00
0.00
15.99
0.00
2.22
14.46
0.00
0.00
1.57
0.00
0.00
.13
o.oo
129
25.3
39.0
24.9
10.7
.17
.39
3-COMPGNENT
WT.PERCENT5
F 55.4?
M 20.53
A 24.06
F 44.05
C 36.87A 19.1?
N 25.92
K 8.26
C 65.8?
HlOTITE-HOHNt-.LENDE GNEISS
2.SON 44.26R, BUR .'iUI.P,
E. MANASSt. 1917
SIU2
TI02
AL203
FE203
FEO
MNOMGO
CAO
NA20
K20
P2O5
H20*
H20-
C0<>
S03
TOTAL
OrtI&r:A|
ANALYSIS
61.21
1.04
16.02
2.10
4.28
0.00
3.65
4.96
4.21
2.54
.23
.64
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.R8
k.ATE?-C02-FKtE
(100.0)
61.06
1.04
15.98
2.09
4.27
0.00
3.64
4.95
4.20
2.53
.23
SITI
ALFt3
FL2MN
Mij
CA
NA
?4 +
-|_
ATOMS
*EIGHT
28.60
.62
8.48
1.47
3.33
0.00
2.20
3.54
3.12
2.11
.10
.01
0.00
0.00
0.00
ATOMS
NUMftERS (100.0
21.56
.28
6.65
.56
1.260.00
1.92
1.87
2.88
1.14
.07
IL
TI
RU
AP
CC
MGO/MGO*FEU
IN FLMCS =
(?EIGHT foOHM
(1U0.0)
10.61
0.00
15.01
35.62
17.22
0.00
0.00
0.00
0.00
4.88
0.00
11.14
0.00
3.05
0.00
1.97
0.00
0.00
NON-OX I DAT I ON NORM
(FE2O3 COIMVFRTED TO FEO)
8.43
0.00
15.07
35.76
17.29
0.00
0.00
0.00
0.00
5.02
0.00
15.94
0.00
0.00
0.00
1.98
0.00
0.00
.50
0.00
197
30
34
17
18
2
23
.4
.2.1
.4
.28
.51
.5
.31
.50
3-COMPONENT
WT.PE?CENTS
F 38.0?
M 71.75
A 40.23
F 35.27C 27.42
A 37.31
N 35.95K 21.69
C 42.36
128MOTITt GNEIS
1.S2H 42.57L.
-.. XMASSt , 1<*
< hILL, S. SOMALI
SIU2
TI02
AL203
FF.203
FF.0
MGO
P?O5
H2O +
H2U-
WATEN-CO2-FK?E
(100.0)
b4.85
.84
16.38
2.82
1.73
0.00
2.98
2.49
5.33
2.51
.OH
SI
Tl
AL
FL3
Ft2
MIt
Mo
CA
NA
K
H
H +
H-
C
s
ATOMS
HEIGHT
30.21
.50
8.6'
1.9
1.3'
0.0(
1.7
1.7
3.9'
i
)
2.08
.03
.01
0.00
0.00
0.00
ATUMS
NUi-iHERS (100.0
22.53
.22
6.71
.74
.50
0.00
1.54
.93
3.59
1.11
.02
CiHT MGI->,
(100.0)
53
52
86
16
90
CO
00
00
00
00
ro
44
10
13
f 7
to
00
00
NON-OXIUATIUN MORM
UE2O3 CONVF.IUED TO KEO)
11.37
.52
14.94
45.42
11.96
0.00
0.00
0.00
0.00
0.00
0.00
13.49
0.00
0.00
o.oo
1.61
0.00
0.00
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
uz
239
35.
9.
25.
2.
39
3-COMPONEhT
WT.PERCENTS
F 29.59
M 19.40
A 51.01
F 30.57
51.6024.30
24.10
No. 128
REMARKS: See under 105. MnO trace.
MINERALOGY: Porphyroblastic cataclasite. Phenocrysts:
Fresh microcline. Groundmass: Abundant small albite-
oligoclase (slightly kaolinised, with mica and calcite),
with zoning out to albite rims; uncommon quartz in
irregular grains, with undulose extinction; chloritised
biotite; rare muscovite; rare, rather large actinolite
associated with biotite; accessory magnetite, ilmenite,
apatite, zircon, secondary titanite, epidote.
No. 129
REMARKS: See under 105. TiO, trace. This analysis
is reproduced in Aloisi (1938) with 0. 29% MgO and 0. 30%
MINERALOGY: Uniformly medium-grained. Groundmass:
Abundant microcline, occasionally with perthite or crypto-
perthite; rare orthoclase; somewhat sericitised albite-
oligoclase, with albite rims; quartz (straight extinction)
with numerous inclusions; yellow-black biotite; accessory
muscovite, iron-oxides, titanite, apatite, zircon.
No. 130
REMARKS: See under 105. Po?5 traLCe> no separate
determination of FeO.
MINERALOGY: Fine-grained, saccharoidal quartz-
feldspar rock. Groundmass: Slightly altered, zoned
andesine (between labradorite and oligoclase-andesine);
no alkali feldspar; quartz, rich in inclusions of
tourmaline and less common apatite; accessory hornblende.
129
PIOTITC i.KANlT[
i.'.Rn 44.05E.
E. HA?AS5t, 1917
r,UF; Ai.Al A, S.
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGU
CAO
NA20
K2O
P2O5
H2O+
H2O-
CO2
503
ANALYSIS72.17
0.00
14.72
.93
1.02
0.00
? 59
1.58
4.B2
4.94
.09
0.00
0.00
0.00
O.CO
0.00
0.00
0.00
71.55
0.00
14.59
.92
1.01
0.00
SI
Tl
AL
Ft3
F?2
MN
MC
CA
NM
K
P
H*H-
Cs
ATOMS
HEIGHT
33.72
0,00
7.79
.65
.79
0.00
.36
1.13
3.58
4.10
.04
0.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.67
0.00
5.93
.24
.29
o.oo.30
.58
3.20
2.16
.03
0
OR
A=?
ANMF
LC
AC
NS
DI
WO
HY
OLhT
H?1IL
TI
RU
AP
CC
MGO/MGG-H-fcO
IN FEMIC3 =
oElCHT NOKto
(100.0)
21.07
0.00
29.C3
40.54
3.83
0.00
0.00
0.00
0.00
2.C.2
I). CO
1.18o.oo
1.34
0.00
0.00
0.00
0.00
. .200.00
.6<t
NON-OX IDA!ION NORM
(FE2O3 CONVERTED TO KEO)
20.13
0.00
29.08
40.61
3.84
0.00
0.00
0.00
0.00
2.93
0.00
3.22
0.00
0.00
0.00
0.00
0.00
0.00
.20
0.00
.37
C/FM
02
3-COMPONENT
HT.PERCENTS
F 15.B5
M 4.80
A 79.35
F 14.67
C 11.89
A 73.44
N 4?.50
K 43.5h
C 13.93
130
DIORI TIC APLlIt.
2.49,>l 44.05E,
F. MAHASbt. 191/
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MG<J
CAO
N?20
K20
P2O5
H20*
H?0-
C02
S03
TOTAL
ANALYSIS
74.00
0.00
15.56
.18
0.00
U.00
.19
5.06
4.36
.32
0.00
? 43
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.10
k,ATER-C02-FKLF
(100.0)
74.25
0.00
15.61
.18
0.00
0.00
SI
TI
AL
Ft 3
FL2
MN
Mti
CA
NAK
P
H*
H-C
s
ATOMS
J.E1CHT
34.57
0.00
8.23
.13
0.00
0.00
.11
3.62
3.23
.27
0.00
.01
0.00
0.00
0.00
ATOMS
NIMhERS (100.0)
25.24
0.00
6.26
.05
0.00
0.00
.1U
1.R5
2.R9
.14
0.00
0
OH
AH
AN
NF
LC
AC
N5
DI
WO
HY
OL
HT
H'l
IL
TI
R.J
Al)
CC
M<iU/MG0 + |-LO
I.J FtMCS =
wtK'HT fiOi.'M
(100.0)
36.97
0.00
1.90
37.12
21.99
0.00
0.00
0.00
0.00
1.03
? Kl
0.00
0.00
0.00
4 ]S
0.00
O.CO
0.00
0.00
U.00
1.00
NON-OXIDATION NORK
(fE2O3 CONVFKTEU TO FEO)
36.86
0.00
1.90
37.13
22.00
0.00
0.00
0.00
0.00
1.53
.58
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
? 70
SIAL
FHC
ALK.
KrfG
TIP
C/FM
OZ
380
47.1
Z.i
27.9
22. a
.05
.r>h
0.0
0.00
12.95
189
3-COhPONFNT
WT.PERCENTS
F 3.56
1.81
51.01
47.1A
44.76
3.29
51.95
131
APLITt
2.O6U 43.0bt? MALA'!LI Alii
F. *IArtASS?, 1917
AyLOLI, S. SOMALI
SIU2
TIO2
AL2O3
FE,;O3
FEU
MNU
MGO
CAO
NA2O
K2O
P205
H2O+
H2O-
CO2
SOJ
TOTAL
OkltliAL
ANALY5IS
7b.18
0.00
13.74
1.01
0.00
0.00
.15
.53
5.11
4.8b
0.00
.23
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100,RO
hATER-C02-FREE
74.75
0.00
13.66
1.00
0.00
0.00
.15
.53
5.08
4.82
0.00
(100.0)
SITI
ALFh3
Ft2MN
MG
CANA
<P
H*
H-C
S
0
ATOMS
*EIGHT
35.12
0.00
7.27
.71
0.00
0.00
.09
.38
3.79
4.03
0.00
.00
0.00
0.00
0.00
49.41
ATOMS
NUMBERS (100.0)
25.58
0.00
5.51
.26
0.00
0.00
.08
.19
3.37
2.11
0.00
62.90
WhlCHT r-iOftM
(100.0)25.74
0.0026.b8
43.11.15
0.000.00
0.00
0.00.80
.600.00
0.00
0.001.01
0.000.00
0.00
0.000.00
In FEMCS = 1.0?
NON-OXIDATIUN NORM
(FE2O3 CONVERTED TO FEO)
25.110.00
28.6443.19
.150.00
0.000.00
0.002.14
0.00.77
0.00
0.000.00
0.000.00
0.00
0.000.00
.25
NIGGLl
424
45.
0.0
0.00
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
N
KC
9.08
1.35
89.57
8.78
4.61
86.61
48.71
46.21
5.05
No. 131
REMARKS: See under 105. No separate determination of
FeO; P2O5 trace.
MINERALOGY: Fine-grained, equigranular quartzofeld-
spathic rock. Groundmass: Abundant kaolinised micro-
cline-microperthite (some cryptoperthite); common
altered albite; quartz, with undulose extinction; rare
biotite (pleochroism yellow-green brown); accessory
zircon, apatite, secondary magnetite; muscovite,
orthoclase(?).
No. 132
REMARKS: TiO-, Al O CaO, NiO absent; MnO trace;
no separate determination of H?O-.
MINERALOGY: Groundmass: Serpentinised, round
colourless olivine (2V = 88-1/2?); accessory chromite in
dispersed form; antigorite; secondary magnetite.
No. 133
MINERALOGY: Groundmass: Quartz, chalcedony,
limonite.
OTHER INFORMATION: Reddish violet-chocolate
coloured rock, with porcelanous appearance, which
forms a thick capping to the dunites of the Yubdo region
(see Augustithis, 1965).
REMARKS: A1-,O, trace; no separate determination of
132
DUNITE8.58N 35.28E, YUBDO, KOLLLGA
L. DUPARC AND E. MOLLY, 1928
SIO2
TIO2
AL2O3FE2O3
FEU
MNO
MGOCAO
NA2OIC2O
P2O5
H2O +H2O-
CO2
SO3CKZO'i
TOTAL
ORIGI,\|AiANALYSIS
36.55
0.00
0.00
7.054.25
0.00
43.510.00
0.00
0.00
0.00
8.60
0.00
0.00
0.00.35
0.000.00
0.00
100.31
kvATER-C02-FREE(100.0)
40.01
0.00
0.00
7.72
4.65
0.0047.62
0.00
0.000.00
0.00
SI
TI
AL
FE3
FE2
MNHG
CA
MAK
P
H*
H-
C
5
ATOMSWEIGHT
17.08
0.00
0.00
4.93
3.30
0.0026.25
0.00
0.000.00
0.00
.10
0.00
0.00
0.00
ATOMSNUMBERS (100.0)
14.06
0.00
0.00
2.04
1.37
0.0024.98
0.00
0.000.00
0.00
NORM SI02 DEFICIT 0.00
MGO/MGO+FEU
IN FEMICS =
0.00Wfcl&HT NORM
(100.0)
0.00
0.00
0.00
0.00
0.00
0.00
0.000.00
0.00
0.00
0.00
13.06
75.7311.21
0.000.00
0.00
0.00
0.00
0.00
-.16NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
0.00
0.00
0.00
0.00
0.000.00
0.00
0.00
0.00
0.00
100.le0.00
0.000.00
0.00
0.00
0.00
0.00
ALFM
cALK
KMG
TIp
0.0100.0
0.00.0
I.88
0.0
0.00
3-COMPONENT
WT.PERCENTSF 20.62
M 79.38A 0.00
F 100.00C 0.00
A 0.00
133rIRBIklTL
8.58N 35.27L,L. DUPARC AND VALLLYi
19?8
YUBuO, wOLLEGA
SI 02
TI02
AL2O3FE2O3
FEU
MNOMGO
CAO
NA20
K20
P2O5
H2U +
H20-
C02
S03CR103
TOTAL
ORIGINALANALYSIS
8a.2O
0.00
0.009.01
.28
0.00.30
.24
0.00
0.00
0.00
1.50
0.00
0.00
0.00.('6
0.00
0.000.00
100.39
ATER-C02-FREE(100.0)
9.97
0.00
0.009.19
.29
0.00.31
.24
0.000.00
0.00
SI
TI
ALFE3
FE2
MNMt,
CA
NAK
P
H*
H-c
s
ATOMSHEIGHT
41.21
0.00
0.006.30
.22
0.00.18
.17
0.000.00
0.00
.02
0.00
0.00
0.00
ATOMSNUMBERS (100.0)
31.09
0.00
0.002.39
.08
0.00.16
.09
0.000.00
0.00
0CFS
OR
ABAN
NE
LC
ACNS
DI
MOHY
OL
MT
HM
IL
TIRU
AP
CC
MGO/MGOFEO
IN FEMCS =
rftlGHT NORM(100.0)
89.220.00
0.00
0.000.00
0.00
0.00
0.000.00
.95
0.00.32
0.00.92
8.58
0.00
0.000.00
0.00
0.00
1.00
NON-OX I DAT I ON NORM(FE2O3 CONvFKTED TO FEO)
84.220.00
0.00
0.000.00
0.00
0.00
0.000.00
1.10
0.0014.68
0.00
0.00
0.00
0.00
0.000.00
0.00
0.00
.07
NlGGLl
11390.0
96.7
3.30.0
I
.06O.U
0.00
3-COMPONENTWT.PERCENTS
F
M
A
F
C
A
N
K
C
96.?7
3.13
0.00
97.48
2.52
0.00
0.00
0.00
100.00
134
ALBITIC A
11.05N 49.
P. ALOISI
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2a5
H2J*
H2O-
co<;SOS
TOTAL
OKIOIMAL
ANALySlb
61.27
0.00
25.2H
,h2
0.00
0.00
0.00
.50
6.50
4.44
0.00
1.68
.20
0.00
0.00
0.00
0.00
0.00
0.00
100.49
WATER-C02-FREE
(100.0)
62.13
0.00
25.64
.63
0.00
0.00
0.00
.51
6.59
4.50
0.00
SITI
AL
FE3F?2
MNMt,
CANA
K.P
H*H-
CS
0
ATOMS
WEIGHT
28.63
0.00
13.38
.43
0.00
0.00
0.00
.36
4.82
3.69
0.00
.02
.00
0.00
0.00
49.17
ATOMS
NUrtBERS (100.0)
21.26
0.00
10.34
.16
0.00
0.00
0.00
.19
4.38
1.97
0.00
61.71
0
CBOR
AHAN
NELC
ACNS
DIWO
HYOL.
MT
H"l
ILTI
RUAr>
Cf
MGU/MGO+htU
IA FLMC5 =
HEIGHT NORM
(100.0)
5.28
8.97
26.68
55.92
2.52
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
? 63
0.00
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
4.86
8.98
26.71
55.98
2.53
0.00
0.00
0.00
0.00
0.00
0.00
.94
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NIGGLI
SIAL
KM
CALK
KMG
TI
P
C/FM
QZ
244
59.
1.
2.
36.
0.
0.
0.
1.-2
3-COMPONENT
WT.PERCENTS
F 5.36
M 0.00
A 94.64
F 5.14C 4.IS
A 90.71
N 56.87K 38.81
C 4.37
No. 134
REMARKS: TiO_ trace, no separate determination of
FeO (analyst: P. Comucci).
MINERALOGY: White, very fine-grained rock.
Groundmass: Fresh albite, some as micro-phenocrysts;
no microcline nor orthoclase; rather rare, small
rounded quartz; small laths of irregularly distributed
muscovite; accessory iron-oxides, chlorite.
No. 135
REMARKS: MnO trace (analyst: P. Comucci).
MINERALOGY: Medium-grained, hypidiomorphic.
Groundmass: Abundant zoned An37 ? An20; scarce micro-
cline (with myrmekite); abundant quartz (gently undulose
extinction); abundant biotite (fresh or slightly chloritised),
intensely coloured and pleochroic; accessory apatite
(rather common and large); zircon in pleochroic haloes in
biotite.
No. 136
MINERALOGY: Groundmass: Abundant chlorite,
kaolinised An30-23, hornblende (more common than in
no. 140), accessory iron-oxide and calcite.
OTHER INFORMATION: Specific gravity 3.046,
published norm incorrect.
135
HIOTITE ijRANlTE
U.27N 49.34E,
P. ALOISI, 1934
HANTARA, KANDALA, N. SOMALI
SIU2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O+
H20-
CO2
S03
TOTAL
ORIGINAL
ANALYSIS
69.96
? 50
15.54
.39
2.22
0.00
1.28
2.98
2.68
3.78
.20
.HI.12
o.oo0.00
0.00
0.00
o.oo0.00
100.46
?ATER-C02-Fr(tE
(100.0)
70.29
.50
15.61
.39
2.23
0.00
1.29
2.99
2.69
3.80
.20
SITl
ALFt3
Ffc2MN
MG
CA
NA
K
PH*
H-C
s
ATOMS
WEIGHT
32.69
.30
8.22
.27
1.73
0.00
.77
2.13
1.99
3.14
.09
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
24.35
6
0
1
1
1
13
37
10
65
00
67
11
81
68
06
cc
MGQ/MGO*FEO
IN FE.MICS =
HEIGHT NORM
(100.0)
30.78
2.03
22.51
22.84
13.71
0.00
0.00
0.00
0.00
0.00
0.00
6.16
0.00
.57
0.00
.95
0.00
0.00
.44
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
30.38
2.04
22.53
22.86
13.72
0.00
0.00
0.00
0.00
0.00
0.00
7.08
0.00
0.00
0.00
.95
0.00
0.00
.44
0.00
SIAL
FMC
ALK
326
42.7
19.0
14.9
23.4
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 25.22
M 12.37
A 62.42
F 21.66C 24.73
A 53.61
N 28.39
K 40.04C 31.57
136
GREENSCHIST
. MURA-jABO WATERFALL. DABUS VALLEY. WOLLEGA
L. MUHLEN AND J.H. HELL-1ERS, 1936
SI02
TI02
AL2O3
FE2O3
FEOMNU
MGU
CAO
NA20
K2G
P205
H20+
H2Q-
C02
S03
S
-0
TOTAL
ORIGINAL
ANALYSIS
43.19
3.75
13.35
10.01
9.25
.22
4.R4
8.29
2.79
.76
.38
3.00
.06
? 38
0.00
.26
0.00
0.00
-.07
100.46
WATER-C02-FKEE
(100.0)
44.60
3.87
13.79
10.34
9.55
.23
5.00
8.56
2.88
.78
.39
SI
TIAL
Ft3FE2
MN
Mo
CANA
<P
H +
H-
CS
ATOMS
WEIGHT
20.18
2.25
7.06
7.00
7.19
.17
2.92
5.92
2.07
.63
? 17
.04
.00
.10
0.00
ATOMS
NUMBERS (100.0)
16.93
1.11
6.17
2.96
3.04
.07
2.83
3.46
2.12
.38
.13
0
C3
OR
AR
ANNE
LCAC
NS
01
WO
HYOL
MT
HM
ILTI
RU
AP
CC
MGO/MGOtFeO
IN FE>ICS x
HEIGHT MOI'M
(100.0)
2.90
0.00
4.63
24.33
22.24
0.00
0.00
0.00
0.00
12.24
0.00
9.64
0,00
14.96
0.00
7.32
0,00
0,00
.85
.69
.84
NON-OXlDATIUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.72
24.82
22.69
0.00
0.00
0.00
0.00
13.31
0.00
.86
24.36
0.00
0.00
7.47
0.00
0.00
.B7
.91
.38
FMC
ALK.
K.MS
TIP
C/FM
OZ
53.2
20.9
7.5
.15
.32
6.6
.38
.39
-29
3-COMPONENT
WT.PERCENTS
F 69.66
M 17.50
A 12.84
F 61.93C 26.66
A 11.41
137
F'AbK XLNOLlTh IN UIORITL 1*3
10.27.J 35.0?E* TULU ;<OjA, LO*[
L. MUHLEN AND J.H.HELLV.E,<S, 1936
OAbUS VALLEY. ?OLLE6A
SI 02
TIO2
AL2O3
FE2O3
FEO
MNO
MGU
CAU
NA2O
KZU
P2U5
H2G +
H2O-
CO2
SO3
TOTAL
ORIGINAL
AUALYSI;
46.11
.57
14.25
10.26
6.11
.19
4.95
9.83
4.44
1.34
.51
1.58
.07
0.00
0.00
0.00
0.00
0.00
0.00
100.21
ATER-C02-FKEE
(100.0)
6.78
4
0
6
5
9
4
1
58
46
41
20
19
02
97
50
36
52
SITI
ALFL3
Ft2
MNMG
CA
NAK
P
H+
H-
C
5
ATOMS
WEIGHT
21.54
.34
7.54
7.18
4.75
.15
2.99
7.03
3.29
1.11
.22
.02
.00
0.00
0.00
ATOMS
NUMBEKS (100.0)
17.43
.16
6.35
2.92
1.94
.06
2.79
3.98
3.26
.65
.16
0CB
OH
AB
ANNE
LCAC
NS
DlWO
HYOL
MTHM
IL
TIR'J
AP
CC
M&O/MGC?-FFO
IN FEt".ICS =
WEIGHT i:OI<M
(100.0)
0.00
0.00
S.05
25.73
15.16
6.75
0.00
0.00
0.00
24.84
0.00
0.00
2.13
15.12
0.00
1.10
0.00
0.00
1.13
0.00
.88
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
0.00
0.00
8.21
14.02
15.47
13.51
0.00
0.00
0.00
27.15
0.00
0.00
19.37
0.00
0.00
1.12
0.00
0.00
1.15
0.00
.38
NI66LI
SIAL
F*
C
ALKK.
MGTI
PC/FM
oz
103
18.
45.
23.
11.
1.
-43
3-COMPONtNT
WT.PERCENTS
F 60.41
M 18.27
A 21.33
F 51.19C 30.74
A 18.07
N 28.44K 8.5b
C 62.97
No. 137
REMARKS: Compared with host-rock no. 143: high
alkalis (for SiCu^o); higher iron, magnesium, calcium;
same aluminium.
MINERALOGY: None given.
OTHER INFORMATION: Specific gravity 3. 132.
No. 138
MINERALOGY: Groundmass: Subparallel An58; some
olivine with keliphytic hornblende; accessory titanite,
magnetite (some in olivine).
OTHER INFORMATION: Specific gravity 2.932; see under
no. 139.
No. 139
MINERALOGY: Groundmass: Labradorite, chloritised
hornblende, orthoclase, augite, apatite, olivine, biotite,
zircon.
OTHER INFORMATION: Specific gravity 2. 969. Mt.
Karawini is a grabbo-anorthosite massif, with associated
hornblende granite and syenitic diorite.
138
ANORTHOSlTIC &Aij!?RO
9.53N 35.14E, MT. KAkAwIM. DAnUS VALLEY. wOLLEGA
L. MUHLEN AND J,H. HELLMEKS. 1936
5102
T10Z
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H2C1*
H20-
C02
S03
5
TOTAL
OKIGIUAL
ANALYSIS
46.30
.77
20.12
2.01
6.02
.07
10.34
9.(41
3.3ft
.34
.04
.66
.10
.17
0.00
.06
0.00
0.00
0.00
100.39
WATER-C02-FKEE
(100.0)
46.67
.78
20.28
2.03
6.07
.07
10.42
9.89
3.41
.34
.04
SI
TI
AL
FE3
Ft2
MN
Mb
CA
NA
K
P
H+
H-
C
S
ATOMS
WEIGHT
21.63
.46
10.65
1.41
4.68
.05
6.24
7.01
2.51
.28
.02
.01
.00
.05
0.00
ATOMS
NUMBERS (100.0
16.74
8
1
5
3
2
21
57
55
82
02
58
80
37
16
01
0
CS
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FKU
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
2.03
20.23
3B.93
4.66
0.00
0.00
0.00
7.07
0.00
0.00
22.19
2.94
0.00
1.47
0.00
0.00
.09
.39
.80
NON-OXIDATION NORM
IFE2O3 CONVERTED TO FEO)
0,00
0.00
2.03
17.97
39.08
5.95
0.00
0.00
0.00
7.17
0.00
0.00
25.83
0.00
0.00
1.4a
0.00
0.00
.09
.39
.72
ALFM
C
ALK
24.746.0
22.0
7.3
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 36.35
M 46.81
A 16.84
F 37.24
C 45.50
A 17.25
139
?,ABBRU
9.53N 35.14E. MT. KAP.AI.IM. uAnUi VALLEY.
L. MUrtLEN AND J.H. HELL.1EPS, 193*.
SIO2
TIO2
AL2O3
FE2O3
FEO
MNiJ
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
S
TOTAL
ANALYSIS
4b.82
.73
16.76
3.11
4.43.09
tf.fil
11.90
3.38
.45
.05
1.37
.06
.05
0.00
.03
0.00
0.00
0.00
100.04
?ATLR-C02-FKLE
(100.0)
49.55
.74
17.01
3.16
4.50.09
8.94
12.08
3.43
.46
.05
SI
TI
AL
FE3
FE2
MN
Mo
CA
NA
K
P
ATOMS
wEIGrfT
22.81
.44
8.87
2.18
3.44.07
5.31
8.50
2.51
.37
.02
ATOMS
NUMhERS (100.0
17.63
7
1
4
4
2
20
22
86
36
03
80
66
40
21
02
0
CB
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FtO
IN FEf'ICS =
WEIGHT NOKM
(100.01
0.00
0.00
2.70
23.75
29.61
2.S8
0.00
0.00
0.00
23.64
0.00
0.00
11.19
4.58
0.00
1.41
0.00
0.00
.11
.12
.86
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
2.72
20.24
29.79
4.88
0.00
0.00
0.00
24.31
0.00
0.00
16.42o.oo
0.00
1.41
0.00
0.00
.11
.12
.71
SI
AL
FM
C
ALK
107
21.7
42.4
28.1
7.h
C/FM
QZ
3-C0MP0NENT
WT.PERCENTS
F 37.3h
M 43.66
A 18.98
F 32.40
C 51.14
A 16.46
N 21.49
K 2.86
C 75.65
CHLORITt SCHIST
? GEDO R1VF.R, CAsuS vAULEY. hOLLFiiA
L. MUHLEN AND J.H. H6LLMERS, 1936
SI02
TI02
AL2O3
FE2O3
FFU
I* NO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
CO,;
S03
s
-0
TOTAL
ac^
ORAy
ANHE
LCAC
NSDI
woHY
OLMT
HV1
ILTI
RU
AP
CC
MGO/MGO+KCO
In FLflCS =
ORItlMAl
ANALYSIS
50.09
1.69
14.77
10.49
3.13
.36
7.30
1.35
7.44
.35
.30
3.07
.11
0.00
0.00
.08
U.OO
0.00
-.02
100.51
WEIGHT NORM
(100.0)
0.00
.32
2.13
59.77
5.08
2.75
0.00
0.00
0.00
0.00
u.oo
0.00
13.12
6.57
6.28
3.30
0.00
0.00
.67
0.00
1.00
WATER-C02-FREE
(100.0)
51.50
1.74
15.18
10.78
3.22
.37
7.50
1.39
7.65
.36
.31
NON-OXIDATION NORM
(FE2O3 CONVFRTED TO FEO)
0.00
.33
2.18
50.97
5.19
8.26
0.00
0.00
0.00
0.00
0.00
0.00
29.02
0.00
0.00
3.37
0.00
0.00
.69
0.00
.55
SITl
Al_FE3
Ft2
MN
MCJ
CANA
KP
H +
H-C
5
0
ATOMS
WEIGHT
23.40
1.01
7.61
7.34
2.43
.28
4.40
.96
5.52
.29
.13
.04
.00
0.00
0.00
46.82
NIGOLI
SI
ALFM
CALK
KMG
TIP
C/FM
QZ
ATOMS
NUMBERS (100.0)
18.46
.47
6.42
2.91
.97
.11
4.02
.53
5.32
.16
.09
60.53
127
22.1
55.3
3.7
18.9
.03
.50
3.2
.32
.07
-49
3-COMPONENT
WT.PERCENTS
F 47.44
M 25.43
A 27.13
F 59.84
No. 140
REMARKS: CO2 absent.
MINERALOGY: Groundmass: An25 and chlorite
(plagioclase is kaolinised), some magnetite and horn-
blende(?).
OTHER INFORMATION: Specific gravity 2.790; this rock
occurs where the regional foliation is N-NNE.
No. 141
MINERALOGY: Abundant kaolinised microcline. Ground-
mass: Hornblende (hastingsite with a tendency to
barkevikite); augite, hypersthene, some An52-48,
magnetite, apatite.
OTHER INFORMATION: Specific gravity 2.878; this rock
is associated with syenite and pegmatite, and occurs at
the effluence of the Moli into the Dabus.
No. 142
MINERALOGY: Coarse-grained. Groundmass: Hasting-
site (3-8 mm grains), fresh An45-43, biotite, orthoclase,
magnetite, olivine, apatite, zircon, small augite.
OTHER INFORMATION: Specific gravity 2.878.
141
MICROCLINL UIORITE
10.34H 35.08E, MOLI STREAM, DAHUS VALLEY, WOLLEGA
L. MUHLEN AND J.H. HELLMEKS, 193<
SIO2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2o
P2O5
H2O+
H20-
CO2
503
S
TOTAL
ANALYSIS
54.12
.75
16.75
4.64
3.90
.11
3.41
6.19
4.59
3.12
.12
1.77
.09
.38
0.00
.05
0.00
o.oo0.00
99.99
*ATER-C02-FREE
55.39
.77
17.14
4.75
3.99
.11
3.49
6.34
4.70
3.19
.12
(100.0)
nM_
FE3"E2
MN
MCCA
?A
it
1.
ATOMS
WEIGHT
25.28
.45
8.86
3.25
3.03
.09
2.06
4.42
3.41
2.59
.05
.02
.00
.10
ATOMS
NUMBERS (100.0)
19.88
.21
7.25
1.29
1.70
.03
1.H7
2.44
3.27
1.46
.04
0
Cfl
OR
ABAN
NELC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
111 FEKICS =
WEIGHT NORM
(100.0)
0.00
0.00
18.84
39.68
16.13
0.00
0.00
0.00
0.00
9.63
0.00
5.72
.51
6.88
0.00
1.45
0.00
0.00
.27
.88
.83
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
19.01
38.12
16.2a
1.04
0.00
0.00
0.00
10.23
0.00
0.00
12.69
0.00
0.00
1.46
0.00
0.00
.27
.89
.46
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 43.44
M 17.34
A 39.22
F 38.06
C 27.50
A 34.36
C
D.I.
33.02
22.45
44.53
142
HORNnLENDE OIORITE
10.27N 35.08E, TULU DOjA, LOwER DA8US VALLEy,
L. MUHLEN AND J.H. HELLfiERS, 1936
SIU2
T102
AL2O3
FE2O3
FFO
MNO
MGO
CAO
NA20
K2U
P2Q5
H20*
H20-
C02
S03
S
TOTAL
ORIGINAL
ANALYSIS
55.34
.70
16.66
5.50
3.65
.09
3.71
6.96
4.20
1.80
.12
1.01
? 12
.04
0.00
.06
0.00
0.00
0.00
99.96
WATER-C02-FREE
(100.0)
56.05
.71
16.87
5.57
3.70
.09
3.76
7.05
4.25
1.82 ?
.12 (
SIri
*L
?E3
~t2
IN
It.
:A4A
ATOMS
WEIGHT
25.85
.42
8.81
3.85
2.84
.07
2.24
4.97
3.12
1.49
.05
.01
.00
.01
0.00
ATOMS
NUMBERS (100.0
20.08
.19
7.13
1.50
1.11
.03
2.01
2.71
2.96
.83
.04
0
CBOR
ARAN
NELC
ACNS
01
MOHY
OL
MT
HM
ILTI
RU
AP
CC
MGO/MGO + FECl
IN FEMCS =
WEIGHT NORM
(100.0)
6.03
0.00
10.80
36.06
21.51
0.00
0.00
0.00
0.00
9.91
0.00
5.91
0.00
6.09
0.00
1.35
0.00
0.00
.27
.09
.91
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
.15
0.00
10.91
36.45
21.74
0.00
0.00
0.00
0.00
10.65
0.00
18.37
0.00
0.00
0.00
1.36
0.00
0.00
.27
.09
.47
3-COMPONENT
WT.PERCENTS
F 46.5?
M 19.67
A 31.81
F 41.38
C 31.48
A 27.14
N 32.41
K 13.89
C 53.70
DIORITE (t.ITH lA'-IC >t.vOl ITH' 137)
10.27N 35.O4JE, TULU ,-OjA, LOwLtf DAbUS VALLEY. ftOLLEGA
L. MUHLEN AND J.H. HtLL ifRS, 193h
SILI2
TIU2
AL2U3
FE203
FEOMHO
MaoCAU
NA20
K2U
P2O5
H2O*
H2U-
COl
SO3
TOTAL
URIC. I .AL
ANALYSIS
56.13
? f,5
14.46
6.63
4.27
.12
2.92
7.64
3.71
1.71
.46
1.39
.or0.00
o.oo
O.CIO
0.00
0.00
0.00
100.16
wATER-C02-FREE
(loo.o)56.87
.66
14.65
6.72
4.33
.12
2.96
7.74
3.76
1.73
.47
SITl
AL
FE3
F?2
MN
Mb
CA
NAK
PH*
H-
C
S
ATOMS
HEIGHT
26.22
.39
7.65
4.64
3.32
.09
1.76
5.46
2.75
1.42
.20
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.56
6
1
1
1
3
2
18
24
R3
31
04
60
00
64
HO
14
Q
caOR
AB
AN
NELC
ACNS
DI
WO
HY
OL
MT
H^1
IL
TI
RU
AP
CC
MGO/MCOtFEO
I ,M FtnlCS =
?.?.IGHT N0'!M
(100.0)
11.53
0.00
10.26
31.67
17.94
0.00
0.00
0.00
0.00
14.14
0.00
2. 22
0.00
9.76
0.00
1.25
0.00
0.00
1.02
0.00
.86
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
4.50
0.00
10.40
32.29
18.IB
0.00
0.00
0.00
0.00
15.34
0.00
17.00
0.00
0.00
0.00
1.27
0.00
0,00
1.03
0.00
.36
NIGGLl
SIAL
FM
C
ALK
K
MG
TIP
C/FM
OZ
163
24.7
37.8
23. ?
13.6
.2
.3
1.4
.5
.6
8
3-C0MP0NENT
WT.PERCENTS
F 56.65
M 15.18
A 28.17
F 45.49C 31.89
A 22.62
N 78.41K 13.09
C 58.50
No. 143
REMARKS: Analysis of host material to basic inclusions
(see no. 137).
MINERALOGY: Fine-grained with schlieren. Ground-
mass: An60-35, hastingsite, chloritised biotite, augite,
large magnetite; some titanite, apatite, zircon.
OTHER INFORMATION: Specific gravity 3. 135.
No. 144
MINERALOGY: Phenocrysts: Large bluish quartz, with
undulose extinction, and apatite inclusions. Groundmass:
Bluish quartz, andesine, dark biotite; accessory ortho-
clase, muscovite, augite.
OTHER INFORMATION: Specific gravity 2. 679; this
rock-type forms a 1 X 2 km massif associated with some
diorite.
No. 145
MINERALOGY: Groundmass: Dominant microcline,
quartz, oligoclase, biotite, augite, apatite.
OTHER INFORMATION: Specific gravity 2.641; this rock-
type forms a 9 X 6 km massif.
144
RIOTITE GRANITE
10.27N 35.08E. TULU LtOJA, LOWER DABUS VALLEY. WOLLEGA
L. MUHLEN AND J.H. HELLMEKS. 1936
SIO2
TIO2
AL2O3
FE2O3
FEU
MNOMGO
CAO
NA2O
K2O
P2O5
H20*
H2O-
CO2503
TOTAL
ORI&IMAL
ANALYSIS
69.24
.02
16.08
1.05
2.11
0.00
.39
3.95
3.95
1.86
.05
.89
.17
.13
.14
0,00
o.oo0.00
0.00
100.03
wATER-CO2-FRtE
(100.0)
70.15
.02
16.29
1.06
2.14
0.00
.40
4.00
4.00
1.88
.05
SITI
AL
FE.3
FE2HN
MoCA
NAK
P
Ht
H-
C
ATOMS
WEIGHT
32.35
.01
8.51
.73
1.64
0.00
.24
2.82
2.93
1.54
.02
.01
.00
.04
ATOMS
NUMBERS (100.0)
24.23
.01
6.63
.28
.62
0.00
.20
1.48
2.68
.83
.01
Q
CBOR
AHAN
NE
LC
ACNS
DIWO
HYOL
MTHI
ILTI
RUAP
CC
MGO/MGO+f EG
IN FEMCS =
WEIGHT NORM
(100.0)
29.42
.77
11.15
33.91
1U.75
0.00
0.00
0.00
0.00
0.00
o.oo4.00
o.ool.f>4
0.00
.04
o.oo
0.00
.11
.30
.30
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
28.35
.77
11.18
33.98
18.79
0.00
0.00
0.00
0.00
0.00
0.00
6.48
0.00
0.00
0.00
.04
0.00
0.00
.11
.30
.19
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 33.76
M 4.17
A 62.07
F 24.46
C 30.57A 44.97
N 40.47
K 19.06C 40.47
145
RIOTITE bPANlTL
10.ION 35.1OE. TULU FAGUEDDO, DABJS VALLEY,
L. MUHLEN AND J.H. HELLiiERS, 193(.
SI02
TIU2
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
74.84
.01
12.73
.88
1.32
0.00
.30
.94
5.79
1.98
.04
.78
.14
.09
.11
0.00
0.00
0.00
0.00
99.95
\?ATER-C02-FREE
(100.0)
75.73
.01
12.88
.89
1.34
0.00
.30
.95
5.86
2.00
.04
SITI
ALFE3
FE2MN
MG
CANA
KP
H+
H-
CS
ATOMS
*EI6HT
34.97
6
1
0
4
1
01
74
62
03
00
ia
67
30
64
02
01
00
02
04
AT0M5
NUMBERS (100.0)
25.82
.00
5.18
.23
.38
0.00
.15
.35
3.88
.87
.01
0
CB
ORAB
ANNE
LC
ACNS
DIWO
HYOL
MT
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WcIGHT NOi:M
(100.0)
31.10
0.00
11.86
49.66
2.B6
0.00
0.00
0.00
0.00
.89
0.00
2.01
0.00
1.29
0.00
.02
0.00
0.00
.09
.21
.37
NON-OXIDATION NORM
(FE2O3 CONVFRTED TO FEO)
30.21
0.00
11.88
49.75
2.87
0.00
0.00
0.00
0.00
.91
0.00
4.06
0.00
0.00
0,00
.02
0.00
0.00
.09
.21
.21
CALK
K
TIP
C/FM
uz
5.7
39.1
.18
.20
.0
.10
.45
168
3-COMPONENT
WT.PERCENTS
F 21.42
M 2.92
A 75.66
F 20.16
C 8.6?
A 71.22
N 66.48K 22.73
C 10.79
CHLORlTE-MAoNETITE SCHlbT (MoNETITE REMOVED)
9.08N 3S.3OE. nO*TA STPEAt?, NEAR YUBDO, ki
P. COnUCCI. 19*8
SI 02
TIG2
AL203
FE2O3
FEO
MNO
MGU
CAO
NA20
K20
P2O5
H2G*
H20-
C0<:
503
TOTAL
ORIC-INAL.
ANALYSIS)
27.12
1.52
25.63
0.00
6.80
.14
25.42
0.00
.28
.90
.?H
11.59
.64
0.00
0.00
0.00
0.00
0.00
0.00
100.32
WATER-C02-FREE
(100.0)
30.79
1.73
29.10
0.00
7.72
.16
28.86
0.00
.32
1.02
.32
SI
TlAL
Ft3
FE2
Mil
MG
CA
NA
KP
H-f
H-C
S
0
ATOMS
WEIGHT
12.67
.91
13.56
0.00
5.29
.11
15.33
0.00
.21
.75
.12
.14
.01
0.00
0.00
51.23
ATOMS
NUMBERS (100.0)
10.79
.46
12.02
0.00
2.27
.05
15.10
0.00
.22
.46
.09
58.55
N0R.-1 P205 EXCESS
0
CT
OR
AB
AN
NELC
AC
NS
CI
WO
HY
OL
MT
H"'
IL
TI
RU
AH
CC
IN FLMCS =
.28
hfclOHT NOr.M
(100.0)
0.00
27.46
6.05
2.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2.66
57.54
0.00
0.00
3.27
0.00
0.00
0.00
0.00
.89
.28
NON-OXIDATlUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
27.46
6.05
2.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2.66
57.54
0.00
0.00
3.27
0.00
0.00
0.00
0.00
.89
NIGGLI
SI
AL
FMC
AL<
K
MG
TIP
C/FM
OZ
45
25.3
73.3
0.0
1.4
.6
.8
1.9
.1
0.0
-60
3-COMPONENT
WT.PERCENTS
F 20.36
M 76.11
A 3.53
F 85.21
C 0.00
A 14.79
76.27
0.00
No. 146
REMARKS: Fe O and CaO traces.
MINERALOGY: Phenocrysts: 1-mm magnetite crystals
(removed prior to analysis). Groundmass: Yellow-green
fibrous chlorite, with some magnetite.
No. 147
REMARKS: No separate determination of H-O-; ^2O5
trace.
MINERALOGY: Groundmass: Serpentinised olivine
(2V = 90?); abundant large magnetite, and minute second
generation associated with lines of serpentinisation; rare
bronzite.
No. 148
MINERALOGY: Rather coarse-grained. Groundmass:
Actinolite-hornblende (pleochroic: yellow-brown ? pale
green ? blue green) subordinate to non-pleochroic augitic
diopside (with iron oxides along cleavages), common
magnetite and ilmenite with titanite rims, accessory
titanite, and rare zoisite; no olivine.
1*7
TMJNITE
0B.57N 35.28. fc YUBDO, wOLLF.GA
P. COMUCCI. 1948
S1O2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2OK2O
P2O5
H2O*
H2O-
CO2SO3
CMOS
KIIO
TOTAL
ORIGINAL
ANALYSIS
37.70
.10
0.00
4.34
5.10
.20
44.27
0.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
.32
.43
0.00
0.00
100.46
?ATER-C02-FREE
41.11
.11
0.00
4.73
5.56
.22
48.27
0.00
0.00
0.00
0.00
(100.0)
SITl
ALFE3
FE2MN
MG
CA
NAK
P
H*H-
CS
ATOMS
WEIGHT
17.61
.06
0.00
3.04
3.96
.15
26.70
0.00
0.00
0.00
0.00
.10
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
14.36
.03
0.00
1.25
1.63
.06
25.17
0.00
0.00
0.00
0.00
0
CBOR
AB
ANNE
LCAC
NS
01MO
HYOL
MT
H*IL
TIRU
APCC
MGO/MG0*FE0
IN FEMCS s
WEIGHT NORM
1100.0)
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
11.89
SI.03
6.67
0.00
.21
0.00
0.00
0.00
0.00
.96
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.53
96.26
0.00
0.00
.21
0.00
0.00
0.00
0.00
.90
cALK
KMG
TIP
C/FM
02
0.0
0.0
I.90
.1
0.00
0.00
-49
3-COMPONENT
WT.PERCENTS
F 17.5R
M 82.42
A 0.00
F 100.00
C 0.00
A 0.00
148
PYROXENE HOHNULENDITE
9.00N 35.58Ei MILL
P. COMUCCI. 194B
S. OF ADASlNA, E. OF GHlMBl. WOLLEGA
SI02
TI02
AL203
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
SO 3
TOTAL
ORIGINAL
ANALYSIS
40.56
3.62
1.70
18.98
5.16
.37
11.70
13.88
1.03
1.05
.39
1.30
.42
0.00
0.00
0.00
0.00
0.00
0.00
100.16
I.ATER-C02-FKEE
(100.0)
41.20
3.68
1.73
19.28
5.24
.38
11.89
14.10
1.05
1.07
.40
SI
TI
AtFt3
FE2
MNMG
CA
NA<
PH*
H-C
s
ATOMS
WEIGHT
18.95
2.17
.90
13.27
4.01
.29
7.06
9.92
.76
.87
.17
.02
.00
0.00
0.00
AT0M5NUMBERS (100.0
16.17
1
5
1
6
5
09
80
70
72
13
96
93
RO
53
13
NORM SI02 DEFICIT 0.00
LIGHT IMORK
(100.0)
0.00
0.00
6.31
2.93
0.00
TIPJ
AP
CC
MGO/MGO*FLO
IN FtMICS =
0.00
0.00
.67
0.00
1.00
-1.25
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
0.00
1.65
5.14
0.00
1.43
58.39
0.00
0.00
26.57
0.00
0.00
7.24
0.00
0.00
.90
o.oo
.54
FM
C
ALK
KMG
TIP
C/FM
OZ
67.
27.
3.
5.
-34*
3-COMPONENT
WT.PERCENTS
F 63.66
M 30.85
A 5.49
F 60.20
C 34.61A 5.19
6.58
86.97
9.05H 35.53E.
P. C0MUCC1. 1948
OF GHI'CI, l.OLLEGA
SIO2TIU2
AL2O3
FE2O3
FEO
MMU
MC.L)
CAU
NA2O
K?O
P2O5
H2O+
H?O-
CO2
SOJ
TOTAL
OkICI.\'A|_
ANALYSIS
4B.60
.10
22.33
2.70
<t.C8
.06
6.64
11.0<t
3.07
.98
.01
.90
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.51
??ATER-C02-rKtE
(100.0)
48.79
.10
22.42
2.71
4.10
.06
6.67
11.08
3.0e
.98
.01
SITl
AL
Ft3
FE2
MN
M6
CA
NA
K
P
H?
H-
C
S
0
ATOMS
*EIGHT22.71
.06
11.81
1.893.17
.05
4.017.89
2.28
.81
.00
.01
0.000.00
0.00
45.82
ATOMSNUMBERS (100.0)
17.46
.03
9.4$
.73
1.23
.02
3.564.25
2.14
.45
.00
60.68
0
C'i
o?An
AN
NE
LC
AC
NS
01
woHY
OL
Mf
H:/
ILTI
RU
AP
cc
IN FEI-UC5 =
rttlGHT NOkM
(100.0)
0.00
0.00
5.P.3
22.19
44.39
2.13
0.00
0.00
0.00
6.53
0.00
0.00
12.78
3.94
0.00
.19
0.00
0.00
.02
0.00
.81
NON-OX I DAT I ON NORM
(FE2O3 CONVEKTED TO FEO)0.00
0.00
5.8619.17
44.623.84
0.000.00
0.008.75
0.000.00
17.540.00
0.00
.19
0.000.00
.02
0.00
.65
NIG6LI
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
QZ
110
29.9
35.026.9
8.2
.17
.64
.1
.01
.77
-23
3-COMPONENT
WT.PERCENTS
F 38.HI
M 38.01
A 73.18
F 31.00
C 50.4B
A 18.57
N 20.34
K 6.49
C 73.16
No. 149
MINERALOGY: Phenocrysts: Fresh An65. Groundmass:
Labradorite, colourless fresh olivine with keliphitic rim
(radiating fibres of tremolite may occasionally occupy the
whole olivine crystal) and associated with magnetite, rare
pale-rose hypersthene, tremolite in veins in plagioclase.
No. 150
REMARKS: In Comucci's end-table SiC>2 is given as
49.43% and the summation as 100. 35%.
MINERALOGY: Very fine-grained. Groundmass:
Irregularly oriented actinolite fibres (weakly pleochroic);
some chlorite; rather rare epidote, altered in part to
ferric oxide; accessory titanite, magnetite, plagioclase.
No. 151
MINERALOGY: Medium-fine-grained melanocratic.
Groundmass: Zoned An52 ? An45, fresh or epidotised;
hornblende, with inclusions of iron-oxide and feldspar;
small epidote and zoisite; titanite, sometimes as rims
to ilmenite.
150
AMPHldOLlTE
9.04N 35.37E.
P. COMUCCI. 1948
HEAD OF KILIMTC RlvER. NE OF YUtJOO, WOLLEGA
SI02
T102
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2U
P2O5H20*
H20-
C02
S03
ORIGINALANALYSIS
49
9
3
6
11
14
1
1
0
0
46
64
6 2
88
76
2282
48
01
19
60
58
08
00
00
(.ATER-C02-FHEE
(100.0)49.62
.64
9.653.89
6.78
.22
11.86
14.531.01
1.19
.60
SITl
ALFE3
Ffc.2
MNMG
CANA
KP
ATOMS
?EIGHT
23.11
.38
5.092.71
5.25
.177.13
10.35
.75
.99
.26
ATOMSNUMBERS (100.0)
18.27
.18
4.191.08
2.09
.076.52
5.73? 72
.56
.19
.000.00
0.00
0
CBOR
ARAN
NELC
ACNS
DI
WOHY
OLMT
HM
ILTI
RO
AP
CC
MGO/MGCu-FEO
IIM FfchlCS =
WEIGHT MORM(100.0)
0.000.00
7.078.59
18.24
0.000.00
0.000.00
40.29
0.0014.25
3.375.65
0.00
1.220.00
0.001.32
0.00
.82
NON-OX 1 DAT ION NORM
(FE2O3 CONVERTED TO FEO)
0,000.00
7.128.65
18.37
0.000.00
0.000.00
41.35
0.007.32
14.630.00
0.00
1.230.00
0.00
1.33
0.00
.69
NlGGLl
10011.5
53.531.5
3.5.44
.67
3-COMPONENTWT.PERCENTS
F 43.15M 47.91
A 8.92
F 38.95C 53.00
A B.05
N 6.06K 7.13
C 86.81
151
0I0R1IE PcABriRO"
9.00N 35.30E,
P. C0MUCC1. 1948
OALATTI, KONTUHl VALLEY? E. OF YUBJO, wOLLEiA
SI 02
TI02
AL203
FE2O3
FEUMNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
T01AL
ORIGINAL
ANALYSIS
50.01
1.20
15.45
5.49
5.46
.15
6.75
11.08
2.70
.43
.43
.95
.28
0.00
0.00
0.00
0.00
o.oo0.00
100.38
*ATER-C02-F?EE(loo.o)
50.441.21
15.585.54
5.51
.15
6.8111.17
2.72
.43
.43
SITl
ALFt3
Ft2
MNMt.
CANA
K
P
Ht
H-C
s
ATOMS
HEIGHT
23.36
.72
8.173.84
4.24
.12
4.077.92
2.00
.36
.19
.01
.00
0.00
0.00
ATOMSNUMBERS (100.0
18
6
1
1
3
4
1
38
33
69
52
68
05
70
37
93
20
13
0
C1
OR
AR
AN
NELC
ACNS
DlWO
HYOL
MTHM
IL
TIRU
APCC
MGO/MGOtFEO
IN FEMICS =
WEICHT NORM
(100.0)
3.22o.oo
2.57
23.0928.98
0.000.00
0.000.00
19.100.00
11.750.00
8.050.00
2.30
0.000.00
.95
0.00
.85
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
0.000.00
2.60
23.3329.29
0.000.00
0.000.00
20.080.00
14.017.41
0.000.00
2.32
0.000.00
.96
0.00
.57
c
ALK
C/FM
OZ
3-COhPONENT
WT.PERCENTSF 52.57
M 32.41A 15.03
F 43.52
C 44.04
A 12.44
N 19.00
K 3.03
C 77.97
152
BASIC QUAfcTZ JlORlTE
8.58N 35.2BE. UILLO
P. COMUCC1. 1948
iTPEAi, U. OF YUBDO. wOLLtGA
SIU2
TIO2
AL2O3
FE2O3
FEO
MNO
MGU
CAO
NA2O
K2U
P2O5
H2U*
H2G-
CO2
503
TOTAL
0
CR
ORAP
AN
NE
LC
AC
NS
DIWO
HY
OLfj
H?
ILTI
RJ
CC
MGO/MdO + t to
I.N FEhlCS =
ORI&INAl
ANALYSIS
52.24
2.75
14.B5
3.38
5.71
.11
4. 39
O.92
3.68
3.80
1.35
1.06
.OS
0.00
0.00
0.00
o.ooU.OO
0.00
100.32
WEIGHT I-.OKM
(100.0)
0.00
0.00
22.69
31.46
U.82
0.00
0.00
0.00
0.00
11.08
0.00
7.71
1.04
4.95
0.00
5.26
0.00
0.00
2.98
0.00
.81
?jATER-C02-FKEE
(100.0)
52.67
2
14
3
5
4
6
3
3
1
77
97
41
76
11
43
98
71
83
36
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0,00
22.84
31.67
12.91
0.00
0.00
0.00
0.00
11.55
0.00
1.45
11.29
0.00
0.00
5.30
0.00
0.00
3.00
0.00
.56
SITI
AL
Ft3
Ffc2
MNM&
CA
NA
tcP
H*H-
C
S
0
ATOMS
WEIGHT
24.41
1.65
7.86
2.36
4.44
.09
2.65
4.95
2.73
3.15
.59
.01
.00
0.00
0.00
45.44
NIGGLl
SIAL
FMC
ALH
K
MGTI
P
C/FM
QZ
ATOMS
NUMBERS
19.14
.76
6.41
.93
1.75
.03
2.40
2.72
2.62
1.78
.42
6V.03
144
24.2
38
20
16
5
1
7
5
6
40
47
7
58
53
-22
(100.0)
3-C0MP0NENT
WT.PERCENTS
F
M
A
FC
A
N
KC
U.I.
43.37
20
35
38
29
11
25
?6
48
94
69
70
4b
84
56
39
Oh
67.43
No. 152
MINERALOGY: Medium-fine grained, melanocratic.
Groundmass: Rather uncommon, sericitised An27-25;
dominant, large laths of biotite; common hornblende;
rather common, irregular grains of titanite; large
crystals of apatite, magnetite, ilmenite; accessory
quartz (mosaic), calcite, epidote.
No. 153
REMARKS: Occurs near Merech, at the Botteji river
and "Tulu Soiaiona. "
MINERALOGY: Variable grain-size, slightly cataclasised.
Groundmass: Orthoclase, more abundant than microcline
(shows myrmekite with albite); large sub-parallel
muscovite (undulose extinction) associated with medium-
sized, abundant biotite; rather common epidote; large
irregular grains of magnetite; accessory zoisite, orthite,
zircon; no quartz.
No. 154
REMARKS: Situated on the "Mora-Gudi-Karavayon"
track.
MINERALOGY: Medium-grained, melanocratic. Ground-
mass: Quartz in mosaic aggregate (straight extinction);
abundant biotite in aggregates; large magnetite and
ilmenite; accessory apatite, titanite, orthoclase(?).
153
SYENITE
P. COMUCCI, 194B
TULU iiOTTEJl. ,OLLEGA
S1O2
TIO2
AL2O3
FE2O3
FEDMNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
503
TOTAL
URI&INAL
ANALYSIS
55.76
.14
22.71
3.36
1.28
.06
.09
1.60
5.43
8.43
.07
1.06
.44
0.00
0.00
0.00
0.00
0.00
0.00
100.43
56.36
.14
22.96
3.40
1.29
.06
.09
1.62
5.49
8.52
.07
SITl
AL
Ft 3
FE2MN
MGCA
NAK
P
H*H-
Cs
ATOMS
KEIGHT
26.05
.08
12.02
2.35
.99
.05
.05
1.14
4.03
7.00
.03
.01
.01
0,00
0,00
ATOMS
NUMBERS (100.0)
19.97
.04
9.59
.91
.38
.02
.05
.61
3.77
3.86
.02
NE
LC
AC
NS
DI
MO
0.00
1.87
50.4820.91
7.6313.89
NORM
(100.0)
ILTI
RU
APCC
MG0/M6O+FE0
IN FEMICS =
0
0
0
1.
.27.00
.00
.15
.00
oo
NON-OXIDATIUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
1.88
50.81
17.39
7.68
15.96
0.00
0.00
0.00
0.00
0.00
0.00
5.85
0.00
0.00
.27
0.00
0.00
.16
0.00
.04
SIAL
FM
CALK
K
188
45.3
12. 8
5.8
36.1
.51
3-COMPONENT
WT.PERCENTS
F
MA
F
C
A
N
KC
24.96
.48
74.56
23.0ft
7.96
68.96
35.12
54.53
10.35
154
QUARTZ DIGRITE
8.45N 35.OOE,
P. COMUCCI< 1948
UARMAY STREAM, C. 40KM M. OF YU3C0, WOLLEGA
SI02
TIU2
AL203
FE203
FEOMNO
MGOCAO
NA20
K20
P2U5
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
65.67
.36
17.26
2.46
1.65
.05
1.17
3.24
5.74
1.84
.14
.79
.12
0.00
0.00
0.00
0.00
0.00
0.00
100.49
WATER-C02-FREE
(100.0)
65.95
.36
17.33
2.47
1.66
.05
1.17
3.25
5.76
1.85
.14
SITl
ALFE3
FE2MN
MGCA
NA<
PH*
H-C
S
ATOMS
WEIGHT
30.68
.22
9.13
1.72
1.28
.04
.71
2.32
4.26
1.53
.06
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
22.84
7
1
3
09
08
65
48OlJ
61
21
R7
82
04
0CB
ORAB
ANNE
LC
ACNS
01MO
HYOL
MTHM
ILTI
RU
AD
CC
MGO/MGO*FtO
IN FEMICS =
* EIGHT r!ORt-i
(100.0)
16.58
.20
10.95
48.90
15.36
0.00
0.00
0.00
0.00
0.00
0.00
3.43
0.00
3.59
0.00
.69
0.00
0.00
.31
0.00
.88
NON-OXI DATI Oh NORM
(FE2O3 CONVERTED TO FEO)
14.03
.20
11.00
49.13
15.43
0.00
0.00
0.00
0.00
0.00
0.00
9.20
0.00
0.00
0.00.69
0.00
0.00
.31
0.00
.38
SIAL
FMC
ALKK
MG
TIP
C/FM
OZ
258
40.0
19. H
13.7
26.6
.17
.35
1.1
.23
.69
52
3-COMPONENT
WT.PERCENTS
F
MA
F
C
A
N
K
C
31.96
9.10
58.94
27.53
21.70
50.77
53.05
17.01
29.94
155
i.IOTITE SCHIST
9.O3U 35.36E. KARTA RIvfR. C.AN.Jl-KApI FORD.
P. COrtUCCl. 19*.8
SI02
TI02
AL2O3
FE203
FEO
MNO
?<&O
CAO
NA20
<2O
P2O5
H2O +
H2O-
CD2
SO3
OKI&IhAi
ANALYSlb
66.32
.22
15.57
2.75
3.01
.07
? 81
4.1?
4.09
2.78
.16
? 6fl
.10
0.00
0.00
0.00
WATEK-C02-FHEE
(100.0)
66.39
.22
15.59
2.75
3.01
.07
.81
4.12
4.09
2.78
.16
SI
TI
AL
Ft3
Ft2
MN
MG
CA
NA
K
PH*
H-C
s
ATOMS
HEIGHT
30.98
.13
8.24
1.92
2.34
.05
.49
2.94
3.03
2.31
.07
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
23.28
6
1
2
1
.06
44
.73
89
02
42
55
79
25
05
0
CT
OR
A3
AN
NE
LC
ACNS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+HEO
IN FEMCS :
WE.I6HT NORM
(100.0)
21.53
0.00
16.49
34.73
15.88
0.00
0.00
0.00
0.00
3.09
0.00
3.50
0.00
4.00
0.00
.42
0.00
0.00
.35
0.00
.47
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
18.72
0.00
16.58
34.91
15.97
0.00
0.00
0.00
0.00
3.21
0.00
9.83
0.00
0.00
0.00
.42
0.00
0.00
.35
0.00
.22
263
36
3-COMPONENT
WT.PERCENTS
F 42.86
M 6.03
A 51.12
F 34.39C 24.60
A 41.01
N 37.22K 25.30
C 37.49
No. 155
MINERALOGY: Rather fine-grained, not strongly
laminated. Groundmass: Abundant biotite, oriented in
various-sized grains, of maroon colour; extremely fine- commoner than dark, chloritised amphibole; accessory
large with slightly undulose extinction. Groundmass:
Kaolinised orthoclase and microcline (perthite and anti-
perthite); rather uncommon albite; large biotite,
grained quartz-feldspar mosaic; rare yellow garnet,
apatite.
No. 156
REMARKS: Summation given as 100.19 in end-table; the
SiO, value is 68. 54%; MnO trace.
MINERALOGY: Phenocrysts: Large corroded orthoclase
(but some perthite and some plagioclase twinning ? optic
angle quoted as "not small"). Groundmass: Microfelsitic;
some devitrified glass with abundant magnetite in fluidal
arrangement; abundant minute quartz; some muscovite,
biotite, epidote.
No. 157
REMARKS: Given as 15 km "east" of Yubdo, from
Sotello and Jauri (same as Aleltu-Meti?) streams.
MINERALOGY: Rather coarse-grained, aggregated
femics; no lamination. Phenocrysts: Rare quartz, very
titanite, magnetite, epidote, apatite, and low-refractive
index mineral "sodalite(?).
156
MlCROGRAMITE a|.,?TARHYOLlTE?
9.06N 35.2?E. KARTA RIVER, NE OF YUBDO,
P. COMUCCI? 194B
SIO2
TIO2
AL2O3
FE2O3
FEU
MNO
MGO
CAO
NA20
K2O
P2O5
H2O +
H2O-
CO2
503
TOTAL
ANALYSIS
68.64
.50
15.41
3.43
.36
0.00
? 38
.07
4.29
5.78
.14
.67
? 32
0.00
0.00
0.00
o.oo0.00
0.00
99.99
WATER-C02-FREE
(100.0)
69.33
.51
15.57
3.46
.36
0.00
.38
.07
4.33
5.84
.14
SITI
ALFt3
Ft2MN
CANA
KP
H+
H-C
5
ATOMS
WEIGHT
32.07
.30
B.15
2.40
.28
0.00
.23
.05
3.18
4.80
.06
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.01
24.08
6
0
2
2
13
37
91
11
00
ZO
03
92
59
04
0
CB
ORAB
ANNE
LCAC
NSDI
WO
HYOL
MTHM
ILTI
PU
APCC
WEIGHT NORM
(100.0)
21.03
2.09
34.60
36.76
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.96
0.00
0.00
3.47
.77
0.00
.10
.130.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
18.88
2.10
34.83
37.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
.97
0.00
0.00
.13
0.00
IN FEMICS = 1.00
c
ALK
C/FM
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
26.62
2.67
70.7?
27.21
.50
72.29
4Z.41
57.00
HORNBLENDE-BlOTITb GRA.NITT
8.47H 35.30E. 15<M S. OF vtJBUO.
P. COMUCCI, 1948
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H2U-
C02
S03
CL
-0
TOTAL
ORIGINAL
ANALYSIS
66.74
.22
14.36
1.67
1.65
.03
.17
.86
4.72
6.80
.32
.55
.18
0.00
.55
.03
0.00
0.00
-.01
100.84
WATER-C02-FKEE
(100.0)
69.06
.22
14.43
1.68
1.66
.03
.17
.86
4.74
6.83
.32
SI
T]AL
Ft3
Ffc2
MN
MGCA
NAK
P
H*
ATOMS
WEIGHT
32.12
.13
7.60
1.17
1.28
.02
.10
.61
3.50
5.64
.14
.01
ATOMS
NUHBERS (100.0
24.10
5
3
3
06
93
44
4B
01
09
32
21
04
09
0
CROR
AB
ANNE
LCAC
NS0!
woHY
OLMT
HMIL
TIRU
APCC
MGO/MCi(J*FEO
IN FEMICS =
WEIGHT NOf-'M
(100,0)
14.22
0.00
40.48
36.10
0.00
0.00
0.00
3.63
0.00
2.09
0.00
1.73
0.00
.62
0.00
.42
0.00
0.00
.70
0.00
.19
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
14.38
0,00
40.61
36.22
0.00
0.00
0,00
0.00
.96
2.12
0.00
4.57
0.00
0.00
0.00
.42
o.oo0.00
.71
o.oo
.10
SIAL
FHc
ALKK
MG
TI
323
39.8
13. 8
4.3
42.1
.4
.0
. H
3-COMPONENT
WT.PERCENTS
F 22.12
38.1354.93
6.95
158
HIOTITE GKAI.1TL
9.O2N 36.05E.
P. COMUCCI, 1948
TULU KLLLA, KAKTA VALLEY? fcOLLFGA
SI02
TIJ2
AL2O3
FE203
FF.u
KNOMGO
CAO
NA2O
IC2U
P2O5
H2O*
H2O-
co<:SO 3
TOTAL
Q
aOR
ABAN
NELC
ACNS
DIWO
HYOL
MTH*
IL
TIRU
AnCC
IN FLe Ki =
ORIGINAL
ANALYSIS
68. R4
.56
13.71
1.22
2.35
.07
.76
2.01
3.69
6.29
0.00
.57
.18
0.00
0.00
o.ooo.oo
0.00
0.00
100.25
(.LIGHT f,Oi(M
(1U0.0)
18.31
0.00
37.46
31.46
2.20
0.00
0.00
0.00
0.00
6.55
0.00
1.16
0.00
1.7B
0.00
1.07
0.00
0.00
O.OO
0.00
.50
fcATER-COz-FREE
(100.0)
69.19
.56
13.78
1.23
2.36
.07
.76
2.02
3.71
6.32
0.00
NON-OXIDAT ION NORM
(FE2O3 CONvEHTED TO FEO)
17.05
0.00
37.55
31.53
2.21
0.00
0.00
0.00
0.00
6.73
0.00
3.86
0.00
0.00
0.00
1.07
0.00
0.00
0.00
0.00
.32
SITI
ALFE3
FE.2
MNMb
CANA
KP
H?H-
C5
0
ATOMS
WEIGHT
32.16
.34
7.25
.85
1.83
.05
.46
1.44
2.74
5.22
0.00
.01
.00
0.00
0.00
47.90
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
02
ATOMS
NUMBERS
24.23
.15
5.69
.32
.69
.02
.40
? 76
2.52
2.A3
0.00
62.39
314
36. b
18
9
34
1
0
6
8
7
53
2R
00
53
75
(100.0)
3-C0MP0NENTWT
FM
A
FC
A
N
KC
O.I.
PERCENTS
74.95
5.31
69.74
22.94
12.92
64.14
30. 7R
52.46
16.76
82.45
No. 158
REMARKS: P2O5 and Cl traces.
MINERALOGY: Variable grain-size. Groundmass: K-
feldspar commoner than plagioclase; microcline com-
moner than orthoclase; microcline occurs as large
crystals with undulose extinction, the orthoclase is
sericitised; albite, with muscovite lamellae and anti-
perthite; large quartz, with inclusions; abundant biotite
(altered to chlorite and epidote) with pleochroic haloes,
some associated muscovite; accessory titanite,
magnetite, epidote, calcite.
No. 159
REMARKS: TiO2 and H2O- traces; specimen collected
from 4 km west of Uris River bridge.
MINERALOGY: Medium grained, femics equal mafics in
abundance. Groundmass: Microcline (some orthoclase?)
with anti-perthite; abundant myrmekite, vermicularitised
at contact; abundant An29-22 in rather large plates;
large rounded quartz, slightly undulose extinction;
pleochroic hornblende, more common than chloritised
biotite, both in large crystals; rare large magnetite;
rather common apatite; scarce titanite, zircon, epidote.
No. 160
REMARKS: No separate determination of FeO; MnO and
PpOg traces; specimen collected from right bank of
stream, 1/2 km SE of bridge.
MINERALOGY: Fine-grained, saccharoidal, mafic rock.
Groundmass: Small albite-oligoclase, and small quartz
(undulose extinction) in mosaic; subordinate muscovite;
no orthoclase, no biotite.
159
HORNBLENDE URANIT
8.55N 36.12E,
P. COMUCCI, 1948
BlRUIK VALLEY. S. OF YUBDO? wOLLEliA
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAD
NA2O
K2O
P2O5
H2O*
H2O-
C02
503
TOTAL
ANALYSIS70.22
0.00
13.H3
2.47
1.58
.03
1.40
4.56
3.60
2.21
? 13
.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.50
WATER-C02-FKEE
(100.0)
70.20
0.00
13.83
2.47
1.58
.03
1.40
4.56
3.60
2.21
.13
SITl
AL
FE3FE2
MNMG
CA
NAK
PH*
H-C
s
ATOMS
WEIGHT
32.81
0.00
7.32
1.73
1.23
.02
.84
3.26
2.67
1.83
.06
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.38
0.00
5.66
.65
.46
.01
.73
1.70
2.42
.98
.04
0CB
OR
ABAN
NELC
AC
NSDI
WO
HY
OLMT
HMIL
TI
RUAP
CC
MGO/MOO-tFEO
IN FfcMICS r
WEIGHT MOPM
(100.0)
30.20
0.00
13.09
30.53
15.01
0.00
0.00
0.00
0.00
5.51
0.00
1.79
0.00
3.59
0.00
0.00
0.00
0.00
.28
0.00
.83
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
27.72
0.00
13.15
30.68
15.08
0.00
0.00
0.00
0.00
5.87
0.00
7.22
0.00
0.00
0.00
0.00
0.00
0.00
.29
0.00
.41
SIAL
FMc
ALK
302
35
22
21
21
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 35.97
M 12.43
A 51.60
F 28.09C 31.6?
A 40.24
N 34.7?
K 21.31C 43.97
160
APLITL
8.ION 34.57Et
P. COMUCCIt 1948
SARITI STREAK, WOLLEGA
SI02
TI02
AL203
FE203
FEOMNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
OHIGINAL
ANALYSIS
76.96
.06
13.64
.48
0.00
0.00
.15
.92
4.04
3.41
0.00
.54
.14
0.00
0.00
0.00
0.00
0.00
0.00
100.34
WATER-COZ-FKEE
(100.0)
77.22
.06
13.69
.48
0.00
0.00
.15
.92
4.05
3.42
0.00
51Tl
ALFt3
Ft2MN
MbCA
NAK
PH*
H-
Cs
ATOMS
teEIGHT
35.96
.04
7.22
.34
0.00
0.00
.09
.66
3.00
2.83
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (1O0.0)
26.26
.02
5.49
.12
0.00
0.00
.08
.34
2.67
1.49
0.00
0
CR
ORAR
AN
NELC
ACNS
01wo
HYOL
MT
HM
IL
TIRU
AC
CC
MG0/M60*Ff:0
IN FEMICS =
fcMGHT NORM
(100.0)
38.20
1.61
20.28
34.40
4.59
0.00
0.00
0.00
0.00
0.00
0.00
? 38
0.00
0.00
.48
0.00
0.00
.06
0.00
o.oo
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
37.95
1.61
20.30
34.43
4.60
0.00
0.00
0.00
0,00
0.00
0,00
I.00
0.00
0,00
0.00
.11
0.00
0.00
0.00
0.00
.44
SIAL
FMC
ALK
KMG
TIP
C/FM
489
51.
3.
6.
38.
0.
1.
3-COMPONENT
WT.PERCENTS
F 5.94
M 1.86
A 92.20
F 5.42
C 10.40
A 84.18
N 48.27
K 40.74
C 10.99
161QUARTZ POHP
R.FILJAK, S
r.YKY
K,T.
.QLOM1CIC,
?TK Oi~
?. 7 AC,
AN. L^
OR AC,
1THLA
1959
SIU2
TI02
AL203
FF2O3
FEU
MNO
MGU
CAU
NA2O
K2O
P2O5
H2O +
H2U-
CO2
503
TOTAL
UKICINAL
ANALYSIS
5a.91
.5B
17.38
(..29
.34
? Oh
4.K1
2.17
4.99
.94
0.00
3.09
.26
0.00
0.00
0.00
0.00
0.00
0.00
99. 82
i,ATER-C02-FKEE(100.0)
.35
.06
4.99
51
TIAL
Ft3FE2
MNMG
CA
NAK
PH+
H-C
S
ATOMS
HEIGHT
27.52
.35
9.20
4.40
.26
.05
2,90
1.55
3.70
.78
0,00
.04
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
0
coOR
ABAN
NF.LC
ACNS
DI
WOHY
OLMT
HMIL
TIRU
APcc
MGO/MGOFEO
IN FtHlCS =
IxtlGhT NOKM
(100.0)
14.P3
4.34
5.77
43.87
11.19
0.00
0.00
0.00
0.00
0.00
0.00
12.45
0.00
0.00
6.54
.ea0.00
.14
0.00
0.00
1.00
NON-OXlDATION NORM
(FE2O3 CONVERTED TO FEO)
10.64
4.39
5.85
44.43
11.33
0.00
0.00
0.00
0.00
0.00
0.00
22.21
0.00
0.00
0.00
1.16
0.00
0.00
0.00
0.00
.63
NIGGLI
SIAL
FM
CALK
KMO
TIP
C/FM
OZ
194
33.8
40.5
7.7
18.0
.1
.5
1.4
0.0
.1
22
3-COMPONENT
WT.PERCENTS
F 38.17
M 27.69
A 34.14
F 45.01
C 14.73
A 40.26
N 61.60
K 11.60
C 26.79
No. 161
MINERALOGY: Phenocrysts: Idiomorphic feldspar,
corroded quartz. Groundmass: Actinolite (chloritised
and epidotised), kaolin, calcite and secondary quartz.
No. 162
REMARKS: SiO2 determined to two significant figures,
A^O, to three significant figures.
MINERALOGY: Mesocratic non-migmatic (metasomatic)
gneiss, medium-coarse grained with granoblastic
texture. Groundmass: Abundant fresh anhedral
An35-15 often as porphyroblastic clots, olive-brown
biotite, feldspathoid (cancrinite or pseudomorphs after
cancrinite, or nepheline); less common fresh non-
perthitic microcline; accessory calcite, iron-ore,
apatite, zircon, very rare sphene, allanite,
pyrochlore.
OTHER INFORMATION: Mode:
cancrinite 8.2% biotite 36.7%
plagioclase 48.0% calcite 5.4%
microcline 0.2% apatite 1.5%
No. 163
REMARKS: See under 162. CO, present but not deter-
mined.
MINERALOGY: Same as 162.
OTHER INFORMATION: Mode:
nepheline 0.2% biotite 30.7%
cancrinite 14.5% calcite 1.4%
oligoclase-andesine 42.6% zircon 0.1%
microcline 10.0% apatite 0.5%.
BIOTITE-CANCRINITE GNEISS
1O.25N 43.HE. TUG DARKAINLE. SOMALI REPUBLIC
O.C. GELLATLY AND G. HORNUNG, 1968
SIO2
TI02
AL2O3
FE2O3
FEO
MNOMGO
CAO
NA2O
K2O
P2O5
H20*
H2O-
CO2SO3
TOTAL
ORIGINAL
ANALYSIS
48.00
1.40
15.SO.92
9.26
.36
5.10
6.18
5.04
4.80
.60
2.73
.11
0.00
0.00
0.00
0.00
0.00
0.00
99.60
WATER-C02-FREE
(100.0)
49.61
1.45
16.02
.54
9.57
.37
5.27
6.39
5.21
4.96.62
SITI
ALFE3
FE2
MNMG
CANA
KP
H+H-
CS
0
ATOMS
WEIGHT
22.43
.84
8,20.36
7.20
.28
3.08
4.42
3.74
3.98.26
.03
.00
0.00
0.00
44.78
ATOMS
NUMBERS (100.0)
18.17.40
6.91
.15
2.94
.12
2.88
2.51
3.70
2.32.19
59.72
0CB
ORAB
ANNE
LCAC
NSDI
WOHY
OL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS ?
WEIGHT NORM
(100,0)
0.00
0.00
29.38
7.04
5.60
20.11
0,00
0.00
0.00
18.73
0.00
0.00
14.27
.78
0.00
2.75
0.00
0.00
1.36
0.00
.53
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0,00
0.00
29.41
6.43
5.60
20.46
0.00
0.00
0,00
18.79
0,00
0.00
15.20
0.00
0.00
2.75
0,00
0.00
1.36
0.00
? 51
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
120
22.9
40.4
16.7
20.0.39
.47
2.6
.64.41
-60
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
c
D.I.
39.56
20,63
39.81
37.91
23.95
38.14
31.46
29.96
38.58
65.73
BIOTITE-CANCRINITE GNEISS
10.25N 43.14E. 1KM WEST OF TUG DARKAINLE, SOMALI REPUBLIC
D.C. GELLATLY AND G. HORNUNG. 1968
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSI5
52.00
.8217.90
2.20
6.24
.281.80
3.02
6.47
5.02
.34
2.08
.07
0.00
0.00
0.00
0.00
0.00
0.00
98.24
WATER-C02-FREE
(100.0)
54.12
.8518.63
2.29
6.49
.29
1.87
3.14
6.73
5.22.35
SI
TIAL
FE3
FE2MN
MGCA
NA
KP
H*
H-C
S
0
ATOMS
WEIGHT
24.29
.499.47
1.54
4.85
.22
1.09
2.16
4.80
4.17
.15.02
.00
0.00
0.00
44.99
ATOMS
NUMBERS (100.0)
19,46
.23
7.90
.62
1.96
.09
1.01
1.21
4.70
2.40
.11
60.32
QCB
OR
AB
AN
NELC
ACNS
DIWO
HYOL
MTHM
ILTI
RU
APCC
MGO/MGO*FE0
IN FEMIC5 *
WEIGHT NORM
(100.0)
0.00
0.00
30.95
27.28
5.08
16.15
0.00
0.00
0.00
7.16
0.00
0.00
7.66
3.33
0.00
1.62
0.00
0.00
.77
0.00
.40
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.000.00
31.08
24.75
5.10
17.660.00
0.000,00
7.30
0.000.00
11.710.00
0.001.63
0.000.00
.780.00
.30
NIGGLI
SIAL
FM
C
ALK
KMG
TIP
C/FM
OZ
15731.9
29.7
9.828.7
.34.27
1.9? 44
.33
-58
3-COMPONENTWT.PERCENTS
FM
A
F
CA
NK
C
D.I.
38.84
8.28
52.88
36.78
13.16
50.07
44.59
34.60
20.81
82,42
BIOTITE-RICH BAND FROM NEPHELINE MI6MATITE
10.25* 43.13E* 1KM WEST OF TUG DARKAINLE. SOMALI REPUBLIC
D.C. GELLATLY AND G. HORNUNG, 1966
SI02
TI02
AL2O3
FE2O3FEO
MNOMGO
CAO
NA2OK2O
P2O5
H2O*
H20-
CO2SO3
TOTAL
QCB
OR
ABAN
NELC
ACNS
DIWO
HY
OLMT
HMIL
TIRU
APCC
MGO/MGO*FEO
IN FEMICS ?
ORIGINALANALYSIS
58.00.85
19.252.65
4.74.22
.401.77
7.403.48
.22.94
.04
0.000.00
0.000.00
0.000.00
99.96
WEIGHT NORM
(100.0)
0.00.53
20.83
56.027.58
4.000.00
0,000.00
0.000.00
0.005.03
3.890.00
1.63
0.000.00
? 490.00
? 19
WATER-C02-FREE
(100.0)
58.60
.86
19.45
2.68
4,79
.22.40
1.79
7.48
3.52
.22
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
,5320.94
53.20
7.62
5.70
0.00
0.00
0.00
0.00
0.00
0.00
9.87
0.00
0,00
1.64
0.00
0.00
,49
0.00
.10
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-
Cs
0
ATOMS
WEIGHT
27.10
.51
10.19
1.85
3.68
.17.24
1.27
5.49
2.89
.10.01
.00
0.00
0.00
46.47
NlGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
02
ATOMS
NUMBERS (100.0)
20.71
.23
8.10
.71
1.42
.07.21
.68
5.13
1.59
.07
61.08
197 1
38.6 t
23.0 /
6.5
32.0 f
(-COMPONENT
(T.PERCENTS
39.58
1 2.14
k 58.28
36,68
.24 C 8.83
.09 A S4.29
2.2.32 N 56.50
.28 ? 27.51
?31 C 13.99
94.87
No. 164
REMARKS: See under 162.
MINERALOGY: Foliated, medium grained, meso-
leucocratic rock with granoblastic texture. Groundmass:
Dominant fresh anhedral An35, oriented olive-brown
biotite, rather rare fresh poorly-twinned microcline;
accessory zircon, sphene, calcite, pyrochlore, and
co-existing traces of quartz and nepheline.
OTHER INFORMATION: Mode:
oligoclase-andesine 77.4%
microcline 6.9%
biotite 12.5%
No. 165
REMARKS: See under 162. Published summation is
99.39%.
MINERALOGY: Medium grained, leucocratic,
granoblastic rock. Groundmass: Dominant anhedral
untwinned AnlO and interstitial altered nepheline (pinite);
subsidiary potassium feldspar and green biotite;
accessory cancrinite, zircon, pyrochlore.
pyrochlore 0.1%
zircon 1.1%
OTHER INFORMATION: Mode:
nepheline 21.7% microcline
cancrinite 4.8% biotite
albite 57.4% zircon
No. 166
REMARKS: See under 162.
MINERALOGY: Similar to 162 and 163.
7.7%
8.1%
0.3%
LEUCOCRATIC BAND FROM NEPHELINE MlGMATITE
IO.25N 43.13E< 1KM WEST OF TUG DARKA1NLE. SOMALI REPUBLIC
D.C. GELLATLY AND G. HORNUNG. 1968
SI02
TI02
A 1.203
FE2O3FEO
UNOMGO
CAO
NA20K20
P2O5
H20*
H20-
C02503
TOTAL
0
CBOR
A6AN
NE
LC
ACNS
DI?0
HY
OLMT
HM
ILTI
RU
APCC
MGO/MG0?FEOIN FEMICS ?
ORIGINALANALYSIS
59.00? 13
21.BO
1.152.52
.12
.40
.97
8.732.34
.032.10
.220.00
0.000.00
0.00
0.000.00
99.51
WEIGHT NORM
(100.0)
0.003.26
14.27
67.034.78
4.96
0.00
0.000.00
0.000.00
0.003.66
1.720.00
.250.00
0.00
.070.00
.26
WATER-C02-FREE(100.0)
60.71.13
22.43
1.182.59
.12.41
1.008.98
2.41.03
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.003.27
14.30
65.824.79
5.71
0.00
0.000.00
0.000.00
0.005.79
0.00
0.00
.25
0.00
0.00
? 07
0.00
.17
SITI
*L
FE3FE2
MNMG
CANA
KP
H*
H-C
s
0
ATOMS
WEIGHT
27.56
.08
11.53
.80
1.96.09
.24
.696.48
1.94.01
.02
.00
0.000.00
48.08
NIGGLI
SIAL
FM
CALK
K
MG
TIP
C/FMOZ
ATOMSNUMBERS
20.95.03
9.12
.31.75
.04
.21.37
6.011.06
.01
61.13
21446,6
13.4
3.836.2
.15
.16
? 4.05
.28
-31
(100.0)
3-COMPONENT
WT,
FM
A
FC
A
NK
C
O.I.
.PERCENTS
24.242.64
73.12
23.366.17
70.46
72.5119.44
8.06
90.17
BIOTITE PORPHYROCLASTIC NEPHELINE GNEISS1O.25N 43.15E. 1KM SE OF HUDUOUREH, SOMALI REPUBLIC
D.C. GELLATLY AND G. HORNUNG* 1968
SI02TI02
AL2O3
FE203FEO
MNOMGO
CAO
NA20K20
P205
H20*H20-
C02
S03
TOTAL
ORIGINALANALYSIS
49.001.96
15.40
.778.85
? 30
4.50
5.574.87
4.75
.45
2.86
? 06
0.00
0.00o.oo
0.00
0.00
0*0099.34
WATER-C02-FREE(100.0)
50.822.03
15.97
.809.18
.314.67
5.785.05
4.93
? 47
SITI
ALFE3
FE2MN
MGCA
NAK
P
H*H-
Cs
0
ATOMSWEIGHT
22.891.18
8.15
.546.88
.232.71
3.983.61
3.94
.20
.03.00
0.00
0.00
44.99
ATOMSNUMBERS (100.0)
18.58.56
6.88.22
2.81.10
2.552.26
3.58
2.30.14
60.01
Q
CBOR
ABAN
NE
LC
ACNS
01
WOHY
OLMT
HMIL
TIRU
APCC
M60/MG0?FE0IN FEMICS ?
WEIGHT NORM(100.0)
0.00
0.00
29.1813.98
6.2815.63
0.00
0.00
0.0016.38
0.00
0.0012.53
1.160.00
3.860.00
0.001.02
0.00
.53
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
0.000.00
29.2213.08
6.2916.15
0.00
0.00
0.0016.47
0.00
0.0013.91
0.000.00
3.860.00
0.001.02
0.00
.50
NIGQLI
SIAL
FMC
ALKK
MG
TI
PC/FM
OZ
12924.0
39.615.8
20.5.39
.45
3.9
.50
.40
-53
3.C0MP0NENTWT.PERCENTS
FH
A
FC
A
NK
C
D.I.
40,5218.96
40,52
38,7722.45
38.77
32.0631.27
36.67
68.13
167
BIOTITE NEPHELINE SYENITE
10.26N 43.14E, 1KM NW OP HUDUDUREH, SOMALI REPUBLIC
D.C. GELLATLY AND G, HORNUNG. 1968
5102T1O2
AL2O3FE2O3
FEOMNO
MGOCAO
NA2OK20
P2O5
H2O*H2O-
CO2SO3
TOTAL
0CB
OR
ABAN
NELC
AC
NS01
WO
HVOL
MTHM
ILTI
RU
APCC
MGO/MGO+FEOIN FEMICS ?
ORIGINALANALYSIS
57.00
.13
22.301.55
3.02.12
0.001.0!
9.164.57
.03
.810.00
0.000.00
0.000.00
0.000.00
99.74
WEIGHT NORM
(100.0)
0.00.40
27.37
40,715.10
20.490.00
0.00
0.000.00
0.00
0.003.34
2.280.00
.25
0.000.00
? 070.00
0.00
WATER-C02-FREE(100.0)
57.62
.13
22.541.57
3.05
.12
0.001.06
9.264.62
.03
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00.40
27.45
39.025.12
21.530.00
0.00
0.000.00
0.00
0.006.17
0.000.00
.25
0.000.00
.070.00
0.00
SITI
ALFE3
FE2MN
MGCA
NAK
P
H*H-
Cs
0
ATOMSWEIGHT
26.63.08
11.801.08
2.35.09
0.00.75
6.803.79
.01
.010.00
0.000.00
46.35
NIGGLI
51AL
FM
CALK
KMG
TIP
C/FMOZ
ATOMSNUMBERS
20.13.03
9.28.41
.89.04
0.00.40
6.282.06
.01
60.47
19044.0
12.7
3.639.5
.250.00
.3
.04.30
-68
(100.0)
3-COMPONENT
WT
FM
A
FC
A
NK
C
D.I.
.PERCENTS
24.970.00
75.03
23.625.43
70.96
61.9830.92
7.10
100.00
No. 167
REMARKS: See under 162. Published summation is
99.68%.
MINERALOGY: Coarse-grained, leucocratic, subsolvus
type; primary hypidiomorphic-granular texture modified
by regional metamorphism to give sutured or
irregular grain boundaries. Phenocrysts: Subhedral,
slightly altered nepheline. Groundmass: Fresh micro-
cline and microcline-perthite, fresh tabular twinned
An5; accessory green biotite or (less commonly) sodic
amphibole or aegirine-augite; rarer zircon, apatite,
ilmenite, sphene; rare pyrochlore, calcite rimmed with
cancrinite.
OTHER INFORMATION: Mode: (Average for Darkainle
nepheline syenites.)
nepheline 23.0% biotite 5.4%
cancrinite 5.0% calcite 0.4%
albite 37. 7% muscovite 0. 2%
microcline 28.0% natrolite 0.3%
No. 168
REMARKS: See under 162.
MINERALOGY: Same as 167.
No. 169
REMARKS: See under 162.
MINERALOGY: Same as 167.
BIOTITE NEPHELINE SYENITE
1O.24N 43.15E. TUG DARKAINLE. SOMALI REPUBLIC
D.C. GELLATLY AND 0. HORNUNG. 1968
5102
TI02
AL203
FE203FEO
HNO
MOOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
0CB
OR
ABAN
NELC
ACNS
01
MOHY
OL
MTHM
IL
TI
RUAP
CC
MGO/MGOtFEO
IN FEMJCS *
ORIGINAL
ANALYSIS
56.26
.08
22.22
1.19
2.76
.12
.12
1.11
9.38
5.26
.07
.69.14
.71
0.00
0.00
0.00
0.00
0.00
100.11
WEIGHT NORM
(100.0)
0.00.84
31.39
36.24.61
23.77
0.00
0.00
0.00
0.00
0.00
0.00
3.47
1.74
0.00
.15
0.00
0.00
.15
1.63
.09
WATER-C02-FREE
(100.0)
57.08
.08
22.54
1.21
2.80
.12
.12
1.13
9.52
5.34
.07
SI
TI
AL
FES
FE2
MN
MG
CA
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
.84
31.46
34.94
.61
24.58
0.00
0.00
0,00
0.00
0.00
0.00
5.63
0.00
0.00
.15
0.00
0.00
.15
1.63
.05
ATOMS
WEIGHT
26.28
.05
11.76
.83
2.15
.09
.07
.79
6.96
4.37
.03
.01
.00
? 19
0,00
46.53
C
ALK
MG
TI
C/FM
OZ
ATOMS
NUMBERS (100.0)
19.95
.02
9.29
.32
.02
.04
.06
.42
6.45
2.38
.02
186
43.3
11.5
3.9
41.2
.27
.05
.2
.10
.34
3-COMPONENT
WT.PERCENTS
F 21.11
M .64
A 78.25
F 20.05C 5.63
A 74.31
N 59,56
K 33.40
C 7.05
AMPHIBOLE NEPHELINE SYENITE
1O.23N 43.14Et 1KM E. OF TUG DARKAINLE, SOMALI REPUBLIC
D.C. GELLATLY AND G. HORNUNG, 1968
SI02
TI02
AL2O3
FE2O3FEO
MNOMGO
CAO
NA20K20
P2O5
H20*
H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
60.00
,08
20,90
1.45
2.83
.20.50
.99
10.83
2.20
0.00.51
.02
0.00
0.00
0.00
0.00
0.00
0.00
100.51
WATER-C02-FREE
60.01
.08
20.90
1.45
2.83
.20.50
.99
10.83
2.20
0.00
(100,0)
SITI
ALFE3
FE2
MNMG
CANA
KP
H*H-
C
S
0
ATOMS
WEIGHT
28.03.05
11.06
I.01
2.20
.15.30
.71
8.03
1.83
0.00
.01.00
0,00
0.00
47.13
ATOMS
NUMBERS (100.0)
20,75
.02
8,52
,38.82
.06.26
.37
7,27
.97
0,00
60,59
0CB
OR
ABAN
NE
LC
ACNS
01WO
HY
OL
MTHM
ILTI
RUAP
CC
MGO/MGO?FEO
IN FEMICS ?
WEIGHT NORM
(100.0)
0.00
0,00
13.04
59.64
1.80
17.46
0.00
0.00
0.00
2.68
0.00
0.00
3.11
2.11
0.00
.15
0.00
0.00
0.00
0.00
.28
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
13.07
58.13
1.81
18.42
0.00
0.00
0.00
2.73
0.00
0.00
5.69
0.00
0.00
.15
0.00
0.00
0.00
0.00
.18
NIGGLI
SIAL
FMC
ALKK
MG
TIP
C/FM
OZ
202
41.514.0
3.6
40,2
.12.17
.2
0.00
.24-59
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
24.03
2.81
73.16
23.39
5.41
71.20
77.25
15.69
7.06
89.54
PYROXENE NEPHELINE SYENITE
10.24N 43.16E. IKM ESE OF HUOUOUREH, SOMALI REPUBLIC
D.C. QELLATLY AND G. HORNUNGt 1968
SIO2
TIO2
*L2O3
FE2O3
FEOMNO
MGOCAO
NA2OK2O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
0CB
ORAB
ANNE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO?FEO
IN FEMICS ?
ORIGINAL
ANALYSIS
57.00
1.04
22.70
2.03
.92.10
0.00
1.20
11.94
2.97
0.00
? 42
.030.00
0.000.00
0.000.00
0.00100.35
WEIGHT NORM(100.0)
0.000.00
17.6145.47
0.0029.71
0.00.93
0.000.00
2.490.00
0.00? 29
1.52
1.98
0.00
0.00
0.00
0.00
0.00
WATER-C02-FREE
(100.0)57.06
1.04
22.722.03
.92.10
0.001.20
11.952.97
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
17.68
43.43
0.00
31.03
0.00
0.00
.25
5.35
0.00
0.00
.28
0.00
0.00
1.98
0.00
0.00
0.00
0.00
0.00
SITI
ALFE3
FE2MN
MGCA
NAK
PH?
H-C
s
ATOMS
WEIGHT
26.63
.62
12.01
1.42
.72.08
0.00
.86
8.86
2.47
0.00.00
.00
0.00
0.00
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
p
C/FM
OZ
ATOMS
NUMBERS (100.0)
19.72
.27
9.26
.53
.27
.03
0.00
.45
8.02
1.31
0.00
186
43.8
7.8
4.2
44.2
.14
0.00
2.6
0.00
.54
-89
3-COMPONENT
WT.PERCENTS
F 16.52
M 0.00
A 83.48
F 15.48
C 6.30
A 78.23
N 74.12
K 18.44
C 7.45
D.I. 100.00
No. 170
REMARKS: See under 162. Published summation is
99.35%.
MINERALOGY: Same as 167.
VOLCANIC S
No. 1001
REMARKS: Loss on heating 6.06%.
MINERALOGY: Comucci (1928) reports the Mt. Ganga
basalt as having a groundmass of brown glass with
plagioclase microlites, skeletal olivines, chalcedony?.
OTHER INFORMATION: A specimen of olivine basalt
from Cape Luma, north of As sab, yielded SiO2 50.09%.
The mineralogy was fresh olivine crystals in a glass and
andesine-labradorite groundmass. Manasse (1908)
reports four SiO2 analyses from the Mts. Ganga-Sella
basalts: 49. 30, 50. 32, 49. 42, 50. 20%. (The last of these
is an olivine basalt.) It is difficult to reconcile the SiO2
values of Ricciardi and Manasse, but Manasse's values
are supported by an analysis of Pantanelli (see 1002).
No. 1002
REMARKS: Loss on heating 3.02%.
MINERALOGY: Comucci (1928) reports the Mt. Sella
basalt as phenocrysts of olivine and a groundmass brown
glass with andesine microlites.
OTHER INFORMATION: Pantanelli (1886) obtained SiO2
50. 2% from a very fine-grained, scoriaceous black
basalt of specific gravity 2.96. He describes phenocrysts
of rare olivine set in a groundmass of labradorite,
olivine augite, magnetite, and rare apatite.
1001
PA5ALT SCORIA
13.O2M 42.32E, NT.
L. RICCIARD1 1886
ASSAb, ERITREA
SI02
TI02
AL2O3
FE2O3
FEUMNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
C02
SO3
CH2O3
TOTAL
ANALYSIS
45.57
0.00
13.07
6.72
12.43
.21
2.60
6.79
2.04
3.36
.52
6.06
0.00
0.00
0.00
.28
0.00
0.00
0.00
99.85
WATER-C02-FKEE
(100.0)
48.73
0.00
13.98
7.19
13.29
.22
2.99
7.26
2.18
3.59
.56
SITl
AL
FL3FE2
MN
Mo
CANA
KP
H*H-
Cs
ATOMS
?EI&HT
21.29
0.00
6.92
4.70
9.66
.16
1.69
4.85
1.51
2.79
.23
.07
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.52
0.00
6.26
2.06
4.23
.07
1.70
2.96
1.61
1.74
? 1H
0
CBOR
ABAN
NELC
ACNS
DI
WOHY
OLMT
HMIL
TI
RUAP
CC
MGU/MGO*FEO
IN FEMICS =
WEIGHT NOtM
(100.0)
0.00
0.00
21.28
18.49
17.69
0.00
0.00
0.00
0.00
12.91
0.00
12.42
5.55
10.44
0.00
0.00
0.00
0.00
1.22
0.00
.34
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
21.57
17.17
17.93
.85
0.00
0.00
0.00
13.31
0.00
0.00
27.92
0.00
0.00
0.00
0.00
0.00
1.23
0.00
.22
C
A LK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 70.02
M 10.24
A 19.74
F 61.10C 21.67
A 17.23
N 16.74K 27.56
C 55.70
1002
RASALT LAVA
13.02N 42.34E, MT. SELLA,
L. RICCIAKDI. 1886
ASSAfj, ERITREA
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
SOi
CR2O3
TOTAL
ORIGINAL
ANALYSIS
46.30
0.00
13.44
4.11
12.61
.22
4.42
11.88
2.13
1.94
.59
3.02
0.00
0.00
0.00
.26
0.00
0.00
0,00
100.92
WATER-C02-FKEE
47.42
0.00
13.76
4.21
12.91
.23
4.53
12.17
2.18
1.99
.60
(100.0)
SITI
AL
Ft3FE2
MNMG
CANA
KP
H*
H-C
s
ATOMS
WEIGHT
21.63
0.00
7.11
2.87
9.80
.17
2.67
8.49
1.58
1.61
.26
.04
0,00
0.00
0.00
ATOMS
NUMBERS (100.01
17.93
0.00
6.13
1.20
4,09
.07
2.56
4.93
1,60
,96
.19
0CH
OR
ABAN
NELC
ACNS
DI
WOHY
OL
MT
H-i
ILTI
RUAP
CC
MGO/MGOtFLO
IN FthlCS =
titlGHT NORM
(100.0)
0.00
0.00
11.76
14.40
21.Hi,
2.22
0.00
0.00
0.00
29.61
0.00
0.00
12.72
6.12
0.00
0.00
0.00
0.00
1.32
0.00
.42
NON-OX IOAT ION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
11.86
9.63
22.04
4.88
0.00
0.00
0.00
30.21
0.00
0.00
20.05
0.00
0.00
0.00
0.00
0.00
1.33
0.00
.33
SIAL
FMC
ALK
KMG
TI
P
C/FM
OZ
104
17
46
28
7
0
-26
3-COMPONENT
WT.PERCENTS
F 66.3?
M 17.53
A 16.14
51.18
36.3612.46
13.35
12.16
74.4H
1003
BASALT LAVA
L. RICC1AKDI, 1886
SI 02
TI02
AL2O3
FE2O3
FEu
MNU
MGU
CAU
NA20
K2U
P205
H2O*
H2U-
C02
S03
CK2O3
TOTAL
UKIGIMAL
ANALYSIS
46.67
0.00
12.64
6.13
10.07
.19
b. 64
11.48
1.64
2.31
.74
2.64
0.00
0.00
0.00
.34
0.00
0.00
0.00
100.49
^ATER-C02-FKEE
(100.0)
47.86
0.00
12.96
6.29
10.33
.19
5.78
11.77
1.68
2.37
.76
SITl
ALFE3
Ft2
MN
MS
CA
NA
K
P
H*
H-
C
S
0
ATOMS
HEIGHT
21.80
0.00
6.69
4.29
7.83
.15
3.40
8.20
1.22
1.92
.32
.03
0.00
0.00
0.00
44.30
ATOhS
NUMBERS (100.0
18.02
0
5
1
3
3
4
1
1
00
75
? 78
26
06
25
75
23
14
24
60.51
0
CH
OR
AR
AN
NE
LC
AC
NS
DIwo
HY
OL
MTHM
ILTI
RU
AP
CC
MGG/MGU?FEu
IN FEI-ilCS =
WEIGHT NORM
(100.0)
0.00
0.00
14.03
14.26
20.79
0.00
0.00
0.00
0.00
27.51
0.00
6.09
6.54
9.13
0.00
0.00
0.00
0.00
1.66
0.00
.57
NON-OXIDATION NORM
(HE203 CONVERTED TO FEO)
0.00
0.00
14.20
10.65
21.04
2.05
0.00
0.00
0.00
28.51
0.00
0.00
21.88
0.00
0.00
0.00
0.00
0.00
1.68
0.00
.40
NIGGLI
SI
ALF?
C
ALK
KMG
TIP
C/FM
02
105
16.
48.
27.
6.
0.
-23
3-COMPONENT
WT.PERCENTS
F 62.82
M ?1.87
A 15.32
F 51.22
10.614.q
74.4
NO. 1003
REMARKS: Loss on heating 2.64%.
MINERALOGY: See 1002.
No. 1004
REMARKS: MnO and MgO traces; loss on heating 1.50%.
MINERALOGY: Phenocrysts: Rare corroded feldspar.
Groundmass: Pale yellow-green aegirine, abundant
nepheline, some feldspar and epidote. Flow texture
sometimes developed.
OTHER INFORMATION: Specific gravity 2. 64.
No. 1005
REMARKS: TiO2 trace; loss on heating 0.83%.
MINERALOGY: Phenocrysts: Anorthoclase. Ground-
mass: Flow-banded anorthoclase and aegirine.
OTHER INFORMATION: The Axum stellae were carved
from this rock-type.
1004
TINGUAITE
14.0814 38.43E,
G.T. PRIOR, 1900
tDOA t>HECRGHIS, AXUM, TlGRAy
SI02
TI02
AL2O3
FE2O3
FEOMNO
MfiO
CAO
NA20
K20
P2U5
H2U+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
57.81
0.00
18.74
5.76
.42
0.00
0,00
1.28
9.35
4.52
0.00
1.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.38
V.ATER-C02-FREE
(100.0)
59.06
0.00
19.15
5.88
.43
0.00
0.00
1.31
9.55
4.62
0.00
SITl
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
27.01
0.00
9.92
4.03
.33
0.00
0.00
.91
6.94
3.75
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.72
0
7
1
0
0
6
2
0
00
92
56
13
00
00
49
50
07
00
0
CBOR
ABAN
NE
LCAC
NSDI
WO
HYOL
MTHM
ILTI
R'JAP
ccMGO/MGO+ftO
IN FEMCS =
WEIGHT NORM
(100.0)
0.00
0.00
27.36
42.38
0.00
16.44
0.00
7.30
0.00
0.00
2.72
0.00
0.00
1.39
2.42
0.00
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
27.67
42.79
0.00
16.67
0.00
0.00
1.95
5.87
0.00
0.00
5.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SIAL
FMC
ALK
K
MGTI
P
C/FM
QZ
199
38.0
16.1
4.7
41.2
.2
0.0
0.0
0.0
.2
-57
3-COMPONENT
WT.PERCENTS
F 30.8?
M 0,00
A 69.IB
F 28.97
61.7?
29.84
1005
SOLVSbERGITL
14.0BN 3B.43E,
G.T. PRIOR, 1900
EDDA GhEORGhJS. AXJK, TIGRAY
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ANALYSIS
63.74
0.00
17.P6
4.27
.30
.19
.10
.83
7.23
5.19
0.00
.63
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.54
WATER-C02-FREE
(100.0)
63.93
0.00
17.91
4.28
.30
.19
.10
.83
7.25
5.21
0.00
Si
TIAL
FE3
Ffc2
MM
MG
CA
NA<
PH*
H-C
S
ATOMS
WEIGHT
29.78
0.00
9.45
2.99
.23
.15
.06
.59
5.36
4.31
0,00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
22.29
0.00
7.36
1.13
.09
.06
.05
.31
4.90
2.32
0.00
Q
CBOR
ABAN
NELC
ACNS
DI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMCS =
WEIGHT NORM
(100.0)
.39
o.no30.84
61.50
.85
0.00
0.00
0.00
0.00
.54
1.08
0.00
0.00
1.60
3.19
0.00
0.00
0.00
0.00
0.00
1.00
NON.OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
31.10
58.60
.86
1.85
0.00
0.00
0.00
2.94
0.00
0.00
4.66
0.00
0.00
0,00
0.00o.oo
0.00
0.00
.04
AL
FMC
ALK
K
MGTI
p
C/FM
OZ
24941.2
14.8
3.5
40.5
.04
0.0
0.00
.24
-13
3-COMPONENT
WT.PERCENTS
F 26.74
M ,59
A 72.67
F 25.65
C 4.66
A 69.70
N 54.57
K 39.17
C 6.26
1006
GRORUDlTIC ObSlDlAN
14.16N 38.59E. BASE. OF
G.T. PRIOk, 1900
BERRACHt N.E. OF AbUA, TIGRAY
SI02
TIO2
AL2O3
FF2O3
FEUMNO
MGOCAO
NA2O
K2O
P2O5
HZU*
H2O-
CO2SO3
TOTAL
0CB
ORA3
AN
NELC
ACNS
DI
WO
HYOL
MT
HH
ILTI
RUAc
1CC
IN FEHICS -
ORIGINA|
ANALYSIS
67.03
O.OO
14.25
1.96
1.70
0.00
0.00
1.05
3.85
3.90
0.00
5.73
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.47
ktlGHT NORM
(100.0)
2B.40
1.88
24.66
34.fc4
5.57
0.00
0.00
0.00
0.00
0.00
0.00
1.61
0.00
3.04
0.00
0.00
0.00
0.00
0.00
0.00
0.00
HATER-C02-FREE
(100.0)
71.51
0.00
15.20
2.09
1.81
0.00
0.00
1.12
4.11
4.16
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
26.30
1.89
24.76
34.98
5.59
0.00
0.00
0.00
0.00
0.00
0.00
6.4B
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SITI
ALF?3
FE2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
31.32
0.00
7.54
1.37
1.32
0.00
0.00
.75
2.86
3.24
0.00
.07
0.00
0.00
0.00
51.01
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
UZ
ATOMS
NUMBERS
24.76
0.00
6.20
.55
.53
0.00
0.00
.42
2.76
1.R4
0.00
62.96
359
45.0
15.6
6.0
33.4
.40
0.00
0.0
0.00
.39
125
(100.0)
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
O.I.
32.OR
0.00
67.92
29.37
A. 43
62.20
43.75
44.32
11.93
100.00
No. 1006
REMARKS: MnO and MgO traces; loss on heating 5.73%.
MINERALOGY: Phenocrysts: Scarce feldspar and augite.
Groundmass: Pale-brown perlitic glass with feldspar
microlites.
OTHER INFORMATION: Specific gravity 2. 376.
No. 1007
REMARKS: No separate determination of FeO; MnO and
MgO traces; loss on heating 0.44%.
MINERALOGY: Phenocrysts: Rare anorthoclase.
Groundmass: Feldspar, aegirine, quartz, iron-oxides;
no flow-texture.
OTHER INFORMATION: Specific gravity 2.58.
No. 1008
REMARKS: No separate determination of FeO; MnO and
MgO traces; loss on heating 0. 28%.
MINERALOGY: Phenocrysts: Small corroded anortho-
clase, quartz, riebeckite phenocrysts die out close to
contact with phyllites. Groundmass: Anorthoclase,
riebeckite, rare aegirine.
OTHER INFORMATION: Specific gravity 2.58. Prior
also gives a partial analysis of a paisanite from Amba
Semajata (14. UN 38. 58E), east of Adua:
SiO2 68.96 MnO tr.
A12O 15.17 MgO tr.
Fe2O 3.10 CaO 0.71
alkalis (by difference from 100.00) 12.06
This rock has a microgranitic appearance, and is com-
posed of anorthoclase, rare quartz and iron-oxide after
aegirine(?).
14.17N 3B.58E,
C.T. PRIOR, 1900
AM[A SIpAT, N.t. OF ADUA, TlGRAy
SI02
T102
A|_203
FE203
FEOMNO
MGOCAO
NA20
K20
P205
H20*
H2CI-
C02S03
TOTAL
OHI&IMA
ANALySI
73.46
0.00
12.47
3.64
0.00
0.00
0.00
.32
5.63
4.03
0.00
.44
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.99
WATER-C02-FKEE
(100.0)
73.79
0.00
12.53
3.66
0.00
0.00
0.00
.32
5.66
4.05
0.00
51TI
*LFt3
Ffc2
MNH6
CANA
<
PH*
H-C
s
ATOMS
HEIGHT
34.32
0.00
6.60
2.55
0.00
0.00
0.00
.23
4.18
3.35
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.42
0.00
5.09
.95
0.00
0.00
0.00
.12
3.7B
1.7B
0.00
0
enOR
ABAN
NE
LCAC
NS
DIWO
HYOL
MT
HMIL
TIRU
APCC
MGO/MGO*FEO
IN FEMICS =
WfclGHT NORM
(100.0)
26.28
0.00
23.99
41.87
0.00
0.00
0.00
5.39
0.00
0.00
.67
0.00
0.00
0.00
1.80
0.00
0.00
0,00
o.ooo.oo
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
26.08
0.00
24.16
42.16
0.00
0.00
0.00
0.00
1.43
1.44
0.00
4.73
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
397
39. 8
14.9
1.9
43.5
.32
0.00
0.0
0.00
.13
134
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
27.37
0.00
72.63
76.73
2.35
70.93
56.41
40.38
3.21
1008
PAISANITE
14.ION 36.55E.
G.T. PRIOR, 1900
AM&A SHELLCDA, ADUA, TIGRAY
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
76.01
0,00
11.96
2,06
0.00
0.00
0.00
.26
4.46
4.73
0.00
.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.76
WATER-C02-FREE
76.41
0.00
12.02
2.07
0.00
0.00
0.00
.26
4.48
4.75
0.00
(100.0)
SITI
ALF?3
FE2MN
MS
CANA
KP
H*H-
cs
ATOMS
WEIGHT
35.51
0.00
6.33
1.44
0.00
0.00
0.00
.19
3.31
3.93
0.00
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.21
0.00
4.86
.54
0.00
0.00
0.00
.10
2.98
2.08
0.00
0
CBOR
AH
ANNE
LC
ACN5
DI
WOHY
OLMT
mIL
TI
RU
AD
CC
IN FEMICS r
WEIGHT NOKM
(100.0)
32.31
0.00
28.18
35.33
0.00
0.00
0.00
2.39
0.00
0.00
.54
0.00
0.00
0.00
1.25
0.00
0.00
o.oo0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
31.96
0.00
28.29
35.47
0.00
0.00
0.00
0.00
.63
1.16
0.00
2.48
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
=M
cALK
KMG
TIP
C/FM
OZ
9.
1.
45.
0.
0.
0.
192
3-COMPONFNT
WT.PERCENTS
F 18.31
17.90
2.2679.84
47.20
50.052.75
1009
OLIVIHE BASALT (K'ECEIT)
. AFAR AND 1S5A
A. DF- GENNES AND A. F,0NAK0, 1900
SIO2
TIO2
AL203
FE203
FEO
MNU
M30
CAO
NA20
K2U
P2GS
H20+
H20-
C02
S03
TOTAL
ORIdNAi
ANALYSIS
48.75
0.00
1B.70
15.46
0.00
0.00
5.32
9.25
2.77
? 72
0.00
.87
0.00
0.00
0.00
0.00
0.00
0.00
0.00
loi.e^
wATER-cOz-FfiEE(loo.o)
48.280.00
18.5215.31
0,000.00
5.279.16
2.74.71
0.00
SI
TI
AL
FE3
FL2
HN
MG
CA
NA
K
P
Ht
H-
C
s
0
ATOMS
?EIGHT
22.78
0.00
9.69
10.81
0.00
0.00
3.21
6.61
2.06
.60
0.00
.01
0.00
0.00
0.00
45.87
ATOMS
NUMBERS (100.0)
17.680.00
7.994.23
0.000.00
2.R83.60
1.95
.33
0.00
61.35
0.00
4.22
23.26
36.08
0.00
0.00
0.00
0.00
7.37
0LMT
HM
IL
TI
RU
AP
CC
MGO/MGG^EU
IN FEf-iICS =
0.000.00
15.34
0.00
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(hE2O3 CONVFrtTED TO FEO)
0.00
0.00
4.35
23.96
37.17
0.00
0.00
0.00
0.00
8.22
0.00
6.95
19.36
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.43
111
25.
22.7
7.2
0.0
0.00
3-COMPONENT
WT.PERCENTS
F 63.70
M 21.92
A 14.38
F 54.62
C 32.80
A 12.3R
No. 1009
REMARKS: No separate determination of FeO; loss on
heating 0. 87%.
MINERALOGY: None given.
No. 1010
REMARKS: No separate determination of FeO; loss on
heating 0. 75%.
MINERALOGY: None given.
No. 1011
REMARKS: No separate determination of FeO; loss on
heating 1.38%; published summation is 100.87.
MINERALOGY: Spherulitic vitric rhyolite with arfvedsonite
and riebeckite.
1010
0L1VINE BASALT (RECENT)
? AFAk AMD ISSA
A. DE GENNES AND A. BONARD. 1900
SI02
TI02
AL2O3
FE2O3
FED
MNO
MGO
CAONA20
K2U
P205
H2O+
H20-
C02
S03
TOTAL
ORlGlNAl
ANALYSIS
50.20
0,00
IB.70
14.66
0.00
0.00
b.37
8.55
2.98
.86
0.00
.75
0.00
0.00
0.00
0.00
0.00
0.00
0.00
102.07
WATER-C02-FREE
(100.0)
49.55
0.00
18.46
14.47
0.00
0.00
5.30
8.44
2.94.85
0.00
SI
TI
AL
Ft3
F?2
MM
MG
CA
NA
K
P
Ht
H-
C
5
ATOMS
HEIGHT
23.45
0.00
9.89
10.25
0.00
0.00
3.24
6.11
2.21
.71
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.05
0.00
7.92
3.97
0.00
0.00
2.88
3.29
2.08
.39
0.00
0
CR
OR
A3
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGOtFEO
IIM FEt'.ICS =
WEIGHT NOKM
(100.0)
4.63
0.00
5.03
24.94
34.62
0.00
0.00
0.00
0.00
5.71
0.00
10. 5B
0.00
0.00
14,50
0.00
0.00
0.00
0.00
0,00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
5.17
25.64
35.60
0.00
0.00
0.00
0.00
6.35
0.00
11.65
15.59
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.45
117
25
3-COMPONFNT
wT.PERCENTS
F 61.4?
M 22.50
A 16.09
F 54.20
C 31.61
A 14.20
1011
HYALORHYOLITt
, AFAR Af,D ISSA
A. DE GENNES AND A. BONARD, 1900
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20*
H20-
C02
S03
TOTAL
OKIcIMA,
ANALYSIS
73.10
0.00
12.20
3.91
0.00
0.00
1.54
1.51
2.R9
4.40
0.00
1.38
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.93
WATER-C02-FREE
(100.0)
73.43
0.00
12.26
3.93
0.00
0.00
1.55
1.52
2.90
4.42
0.00
SI
TI
AL
FE3
FE2
MN
Mb
CA
NA
<
P
H*
H-
C
S
ATOMS
WEIGHT
34.15
0.00
6.46
2.73
0.00
0.00
.93
1.08
2.14
3.65
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.42
0.00
5.00
1.03
0.00
0.00
.HO
.56
1.95
1.95
0.00
0
CH
OR
Afl
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H<4
IL
TI
RU
AP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
33.97
0.00
26.20
24.63
7.30
0.00
0.00
0.00
0.00
.19
0.00
3.77
0.00
0.00
3.94
0.00
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
31.54
0.00
26.39
24.82
7.36
0.00
0.00
0.00
0.00
.21
0.00
9.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.46
c
ALK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 30.69
M 12.09
A 57.22
F 30.76
C 11.88
A 57.36
N 32.84
K 50.00
C 17.16
1012
HYAL0RHY0LITE
. AFAR AND ISSA
A. DP GENNES AND A. bONARO, 1900
SI02
TI02
AL203
FE203
FEO
MNOM6U
CAO
NA20
K20
P2O5
H20*
H20-
C02
50J
TOTAL
ORI&INAi
ANALYSIS
76.60
0.00
10.40
5.65
0.00
0.00
1.52
.51
l.PO
4.10
0.00
1.20
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.78
WATER-C02-FKEE
(100.0)
76.16
0.00
10.34
5.62
0.00
0.00
1.51
.51
1.79
4.0e
0.00
SI
TIAL
FE3Ft2
MNM&
CA
NAK
PH*
H-C
S
0
ATOMS
-EIGHT
35.79
0.00
5.50
3.95
0.00
0.00
.92
.36
1.34
3.40
0.00
.01
0.00
0.00
0.00
50.50
ATOMS
NUMBERS (100.0)
26.41
0.00
4.23
1.47
0.00
0.00
.78
.19
1.20
1.80
0.00
63.92
0
C3
ORAR
ANNE
LC
ACN5
01wo
HYOL
MT
HM
ILTI
RUAC
CC
Wtl&HT NORM
(100.0)
46.68
2.05
24.16
15.18
2.52
0.00
0.00
0.00
0.00
0.00
0.00
3.77
0.00
0.00
5.63
0.00
0.00
n.oo0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
43.33
2.07
24.42
15.35
2.55
0.00
0.00
0.00
0.00
0.00
0.00
12.28
0.00
0.00
0.00
0.00
o.oo0.00
0.00
0.00
NIGGLI
SI
ALFM
CALK
,KMG
TIP
C/FM
OZ
435
34.
37.
3.
24.
0.
0.
236
FtMCS = 1.00
3-COMPONENT
wT.PERCENTS
F 43.23
M 11.63
A 45.14
F 46.85
C 4.23A 48.92
N 28.08
K 63.96
No. 1012
REMARKS: No separate determination of FeO; loss on
heating 1. 20%.
MINERALOGY: Same as 1011.
No. 1013
REMARKS: No separate determination of FeO; loss on
heating 2. 50%.
MINERALOGY: None given.
No. 1014
REMARKS: In the two source references given it is
evident that some oxide values have been transposed;
these have been corrected for, following El-Hinnawi
(1964).
MINERALOGY: None given.
1013
RHYOLITE
, AFAR ANL 1SSA
A. OE GENNES AND A. CONAPD, 1900
SI02
TI02
AL203
FE2O3
FEU
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
503
TOTAL
ORlGlNAi
ANALYSIS
76.80
0.00
11.80
.B5
0.00
0.00
1.28
.43
.40
5.90
0.00
2.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.96
WATER-C02-FKEE
78.80
0.00
12.11
.87
0.00
0.00
1.31
.44
.41
6.05
0.00
(100.0)
SITI
AL
FE3FE2
MN
Mi
CANA
KP
H+
H-C
S
ATOMS
WEIGHT
35.88
0.00
6.24
.59
0.00
0.00
.77
.31
.30
4.90
0.00
.03
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
27.02
0.00
4.89
.23
0.00
0.00
.67
.16
.27
2.65
0.00
0
enOR
ABAN
NE
LCAC
NSD!
WO
HYOL
MT
HM
ILTI
RU
AB
CC
MGO/MG0*FEO
IN FEMCS =
WEIGHT NORM
(100.0)
50. ZZ
4.06
3S.89
3.48
2.20
0.00
0.00
0.00
0.00
0.00
0.00
3.28
0.00
0.00
.87
0.00
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
49.71
4.07
35.95
3.49
2.20
0.00
0.00
0,00
0.00
0.00
0.00
4,59
0.00
0,00
0.00
0.00
0,00
0.00
0.00
0.00
.77
FMC
ALK
K
MG
TIP
C/FM
OZ
18.1
3.3
29.4
.91
.75
0.0
0.00
.18
325
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
10.08
15.IB
74.73
11.21
5.67
R3.U
1014
ANKARAMITt
, BETWEEN Jlf-uTI AND DAHITA, AFAR AND ISSA
RAOULT (IN KREHKEL. 1925 AND ffOHLEDER AND HITCHEN, 1930)
SI02
TI02
AL2O3
FE203
FEOMNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
44.24
2.18
8.61
5.57
7.62
0.00
14.68
13.03
1.84
.47
.17
1.98
0.00
0.00
.04
0.00
0.00
0.00
0.00
100.43
WATER-C02-FREE
(100.0)
44.95
2.22
8.75
5.66
7.74
0.00
14.92
13.24
1.87
.48
.17
SITI
ALFE3
Ft2
MN
MGCA
NAK
P
H*
H-
cs
ATOMS
WEIGHT
20.67
1.31
4.56
3.90
5.92
0.00
8.85
9.31
1.37
.39
.07
.02
0.00
0.00
.02
ATOMS
NUMBERS (100.01
16.70
.62
3.83
1.58
2.41
0.00
8.27
5.27
1.35
.23
.05
0
C3
ORAn
AN
NELC
AC
NSDI
woHY
OL
MT
HM
ILTI
RU
AO
CC
MGO/MGO+FLO
IN FEMCS =
WEIGHT NORM
(100.0)
0.00
0.00
2.83
9.68
14.04
3.34
0.00
0.00
0.00
40.13
0.00
0.00
17.18
8.22
0.00
4.20
0.00
0.00
.3H
0.00
.89
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
2.86
3.19
14.20
6.95
0.00
0.00
0.00
41.57
0.00
0.00
26.61
0.00
0.00
4.25
0.00
0.00
.38
0.00
.72
FMC
ALK
60.6
26.1
3.9
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 43.70
M 4S.64
A 7.65
F 46.23
C 45.67A 8.10
N 11.99K 3.06
C 84.94
1015
P0RPHYRIT1C -SASALT
, faETWEEN . uilfcT KhARAB AND OBOCK (AFAR AND IS5A)
RAOULT (IN I<.RENK.E:L. 1925 AND ROHLEDER AND HITCHEN, 1930)
5IU2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CftO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
46.09
2.00
17.71
3.31
6.36
0.00
4.75
13.62
2.52
.90
.36
.26
0.00
0.00
.05
0.00
o.oo0.00
o.oo100.13
?,ATER-CO2-FKtE
(100.0)48.IB
2.0017.74
3.326.37
0.004.76
13.842.52
.90
.36
SITI
ALFE3
FE2MN
Mb
CANA
KP
H*H-
CS
0
ATOMSWEIGHT
22.471.20
9.372.32
4.940.00
2.879.88
1.87
.75
.16
.00
0.000,00
.02
44.30
ATOMSNUMBERS (100.0)
17.68
7
1
0
2
5
1
55
67
92
96
oo61
45
HO
42
11
60.83
0
CHOR
AnAN
NELC
ACNS
DI
WO
HY
OL
MT
HM
1L
TI
RU
AP
ccMGU/MGO+FEO
IN FEMICS =
WtlGHT NORM(100.0)
0.000.00
5.34
20.91
34.38
.27
0.000.00
0.0026.14
0.000.00
3.554.8?
0.003.00
0.000.00
.79
0.00
.73
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
0.000.00
5.37
17.20
34.602.35
0.000.00
0.0027.02
0.000.00
8.B30.00
0.003.83
0.000.00
.79
0.00
.54
NIGGLI
SIAL
FM
C
ALKK
MGTI
PC/FM
02
HI
24.
34.
34.
7.
3.
-17
3-COMPONENTWT.PERCENTS
FM
A
F
CA
N
Kc
54.2026.63
19.17
35.93
51.3612.71
14.62
5.2280.16
No. 1015
REMARKS: See under 1014. El-Hinnawi (1964) quotes
the SO3 value as Cl.
MINERALOGY: None given.
No. 1016
REMARKS: MnO trace; loss on heating 1.05%.
MINERALOGY: Phenocrysts: Large alkali feldspar,
minor plagioclase. Groundmass: Feldspar, riebeckite,
quartz, calcite.
OTHER INFORMATION: This is most probably, but not
certainly, a PreCambrian Basement rock.
No. 1017
REMARKS: The analyses of Arsandaux (1903a, b) are
only quoted to one decimal place; loss on heating is given
under H_O+.
MINERALOGY: Phenocrysts: Anorthoclase crystals with
'secondary' albite penetrations. Groundmass:
Anorthoclase, aegirine, riebeckite, quartz.
1016
*DAHAMITE* (RIEBECK.ITE C0MEND1TE) nBASEMENT"
, SOCOTHA ISLAND, INDIAN OCEAN
A. PELIK.AN. 1902
SI02
TI02
AL203FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20 +H20-
C02S03
TOTAL
OK I GINALANALYSIS
74.02
0.00
13.561.93
1.09
0.00.23
.56
5.R0
2.06
0.00
1.050.00
0.000.00
0.000.00
0.00
0.00
100.30
WATER-C02-FREE
74.58
0.00
13.66
1.94
1.10
0.00.23
.56
5.84
2.080.00
(100.0)
SI
TI
AL
FE3
FE2
MNMG
CA
NA
KP
H*
H-
Cs
ATOMSWEIGHT
34.58
0.00
7.17
1.35
.85
0.00.14
.40
4.30
1.710.00
.01
0.000.00
0.00
ATOMSNUMBERS (100.0)
25.49
0.00
5.50.50
.31
0.00.12
.21
3.87.91
0.00
0
caOR
ABAN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H1*!
IL
TIRU
AP
CC
MdO/MGCUKEO
IN FEhlCb =
*ElGHT NORM(100.0)
30.74.75
12.30
49.582.R1
0.00
0.00
0.00
0.00
0.00
0.00
.99
0.00
2.83
0.00
0.00
0.00
0.00
0.000.00
.65
NON-OXIDATION NORM(FE20J CONVERTED TO FEO)
28.79.75
12.35
49.772.82
0.00
0.00
0.00
0.00
0.00
0.00
5.52
0.00
0.00
0.00o.oo
0.00
0.00
0.000.00
.13
0.00
.22
153
3-COMPONENT
WT.PERCENTS
F 27.lfl
M 2.07
A 70.75
F 26.40
68.88
24.47
6.65
09.27N 41.53E. KARSA, HARAkrE
H. ARSANDAIJX. 1903A
SI02
TIU2
AL203
FE203FEO
MNO
MGO
CAO
NA20
K2U
P2U5
H20*
H20-C02
S03
OR 101 MAIANALYSIS
66.50
0.00
18.90
3.601.30
0.00.40
.20
4.80
4.50
0.00.90
0.000.00
0.00
WATER-C02-FREE(100.0)
66.370.00
18.86
3.59
1.300.00
.40
.20
4.794.49
0.00
SITI
AL
FE3
Ft2MN
MG
CA
NAK
PH+
H-
Cs
ATOMSWEIGHT
31.070.00
10.00
2.52
1.010.00
.24
.14
3.563.74
0.00.01
0.000.00
0.00
ATOMSNUMBERS (100.0)
23.040.00
7.72
.94
.38
0.00.21
.07
3.231.99
0.00
Q
CB
OR
AB
ANNE
LC
AC
NS
DI
WO
HY
OLMT
HM
IL
TIRU
AP
CC
M6O/MG0+FE0
IN FEMICS =
WEIGHT NOKM(100.0)
20.125.73
26.61
40.64.99
0.00
0.00
0.00
0.00
0.00
0.00
1.00
0.004.19
.71o.oo
0.000.00
o.oo0.00
1.00
NON-OXIDATION NORM(FE203 CONvEkTED TO FEO)
16.715.77
26.80
40.92
1.000.00
0.00
0.00
0.00
0.00
0.00
8.80
0.000.00
0.00
0.00
0.000.00
0.00
0.00
.14
28547.8
MGTI
PC/FM
QZ
.140.0
0.00.05
56
3-COMPONENT
?|T.PERCENTS
F 33.56
50.53
47.37
1018
PANTELLEFUTE
09.0HU 39.52E, TADECrtA
H. ARSANDAUX. 1903A
SIu2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
<2O
P2O5
H2O*
H2U-
CO2
SO3
TOTAL
ANALYSI68.50
0.00
12.10
6.20
2.20
0.00
.10
.60
6.10
4.50
0.00
.20
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.?>0
?ATER-C02-FRtE
(100.0)
68.30
0.00
12.06
6.18
2.19
0.00
.10
.60
6.08
4.49
0.00
SITI
AL
FE3
FE2MN
Mi
CANA
KP
H*
H-C
s
ATOMS
WEIGHT
32.00
0.00
6.40
4.34
1.71
0.00
.06
.43
4.53
3.74
0.00
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.06
0.00
5.01
1.64
.65
0.00
.05
.23
4.16
2.02
0.00
0
CBOR
ABAN
NE
LC
AC
NS
DIWO
HY
OL
MT
HM
IL
TI
RU
APcc
IK&I6HT NORM
(100.0)
16.93
0.00
26.58
37.03
0.00
0.00
0.00
12.83
0.00
2.62o.oo
1.46
0.00
2.56
0.00
0.00
0.00
o.oo0.00
U.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
17.27
0.00
26.90
37.47
0.00
0.00
0.00
0.00
3.43
2.68
0.00
12.24
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
294
30.7
28.7
2.H
37.9
.33
.02
0.0
0.00
.10
64
3-COhPONENT
WT.PERCENTS
FM
A
F
CA
N
KC
43.9R
.52
55.50
42. 86
3.06
54. OH
54.46
40.18
5.36
No. 1018
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1019
REMARKS: See under 1017. Loss-on-heating trace.
MINERALOGY: None given.
No. 1020
REMARKS: See under 1017.
MINERALOGY: None given.
1019
PANTELLtRlTIC OHSIwlAN
09.00N 39.55E. FANTALIi
H. AR5ANDAUX* 1903A
S102
TI02
AU2O3
FE2O3
FEOMNO
MGUCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
69.10
0.00
10.50
3.60
6.40
0.00
.10
.40
6.20
4.30
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.60
WATER-C02-FritE
68.69
0,00
10.44
3.58
6.36
0.00
.10
.40
6.16
4.27
0.00
(100.0)
SI
TlAL
FE3FE2
MN
MS
CANA
K
PH*
H-
C
S
ATOMS
WEIGHT
32.28
0.00
5.56
2.52
4.97
0.00
.06
.29
4.60
3.57
0.00
0.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.38
0.00
4.37
.96
1.89
0.00
.05
.15
4.24
1.94
0.00
0
CBOR
AOAN
NE
LCAC
NSDI
WO
HY
OL
MT
HM
ILTI
RU
AP
CC
MGO/MGO+FEO
14 FEM1CS =
WEIGHT NOPM
(100.0)
19.18
0.00
25.33
29.85
0.00
0.00
0.00
10.38
2.48
1.76
0.00
11.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.03
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
20.95
0.00
25.50
30.05
0.00
0.00
0.00
0.00
5.26
1.77
0.00
16.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.02
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
292
26.2
34. 8
l.B
37.1
.31
.02
0.0
0.00
.05
76
3-C0MP0NENT
WT.PERCENTS
F 48.54
56.88
39.45
1020
PANTELLERITE
09.18N 40.5lEi MULU.
H. ARSANDAUX, 1903A
E. OF K.IES50. HARA&GE
SI02
TI02
AL2O3
FE2O3
FEOmo
MGO
CAU
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
71.40
0.00
11.80
5.60
1.40
0.00
.60
.20
4.20
4.30
0.00
1.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.90
WATER-C02-FREE
(100.0)
71.76
0.00
11.86 n
5.63 FE3
1.41 "E2
0.00 MN
.60 Mb
.20 CA
4.22 NA
4.32 ?
0.00 f
<u4_
ATOMS
WEIGHT
33.36
0.00
6.24
3.92
1.09
0.00
.36
.14
3.12
3.57
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.07
0.00
4.88
1.46
.41
0.00
.31
.08
2.86
1.93
0.00
0a
ORAS
ANNE
LCAC
NSDl
woHY
OLMT
HMIL
TI
RU
AP
CC
MG0/MG0*F?O
Hi FtKICS =
WEIGHT NORM
(100.0)
29.26
0.00
25.61
35.81
.58
0.00
0.00
0.00
0.00
? 33
0.00
1.35
0.00
4.55
2.51
0.00
0.00
0.00
0.00
0.00
I.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
24.53
0.00
25.89
36.20
.59
0.00
0.00
0.00
0.00
.37
0,00
12.43
0,00
0,00
0.00
0.00
0,00
0.00
0.00
0.00
.15
SIAL
FMC
ALK
K.
MG
TIP
C/FM
OZ
351
34.3
31.0
1.1
33.7
.40
.14
0.0
0.00
.03
117
3-COMPONENT
WT.PERCENTS
F 43.4R
M 3.73
A 52.80
F 44.59
C 1.27
A 54.14
N 48.?B
K 49.43
C 2.30
1021
PANTELLERlTIC O'jSl,;lAN
08.55,< 39.23E, bALCHU
H. ARSANDAUX. 1903A
SIO2
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K2O
P205
H2O*
H2O-
C02
S03
TOTAL
OR IGI MAI.
ANALYSIS
71.70
0.00
K.JO
1.60
1.60
0.00
.40
0.00
3.80
4.60
0.00
2.20
0.00
0.00
0.00
0.00
o.oo
0.00
0.00
100.10
WATER-C02-FKEE
(100.0)
73. 2<,
0.00
14.50
1.63
1.63
0.00
.41
0.00
3.88
4.70
0.00
SITl
ALFE3
FE2
MN
Mb
CA
NA
K
PH*
H-C
S
0
ATOMS
HEIGHT
33.50
0.00
7.51
1.12
1.24
0.00
.24
0.00
2.82
3.82
0.00
.03
0,00
0.00
0.00
49.82
ATOMS
NUMBERS (100.0)
25.25
0.00
5.89
.42
.47
0.00
.21
0.00
2.60
2.07
0.00
63.08
0
CBOR
A8AN
NFLC
ACNS
DI
WOHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO-fFEO
IN FErUCS =
WEIGHT HORM
(100.0)
31.16
3.01
27.85
32.93
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2.68
0.00
2.38
0.00
0.00
0.00
0.00
o.oo
0.00
.45
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
29.52
3.02
27.94
33.0*
0.00
0.00
0.00
0.00
0.00
0.00
0.00
6.49
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.20
N1GGLI
SIAL
FMC
ALK<
MGTI
P
C/FM
QZ
395
46. 1
17.3
0.0
36.6
.44
.19
0.0
0.00
0.00
148
3-COMPONENT
WT.PERCENTS
F 26.67
45.24
54.76
0.00
No. 1021
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1022
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1023
REMARKS: See under 1017.
MINERALOGY: None given.
1022
PANTELLERITE
0B.58N 39.08E, CHAFFADENZA,
H. ARSANDAUX? 1903A
SI02
TIO2
AL2O3
FE2O3
FEO
MNOMGO
CAO
NA20
K20
P2O5
H2Ot
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
72.90
0.00
12.40
3.00
2.40
0.00
.50
.10
4.40
4.30
0.00
.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.40
wATER-COZ-FKEE
(100.0)
72.90
0.00
12.40
3.00
2.40
0.00
.50
.10
4.40
4.30
0.00
SITI
AL
FE3FE2
HNHG
CANA
KP
H+
H-C
S
ATOMS
WEIGHT
34.06
0.00
6.56
2.10
1.87
0.00
.30
.07
3.26
3.57
0.00
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.32
0.00
5.08
.79
.70
0.00
.26
.04
2.97
1.91
0.00
0
CBOR
ABAN
NFLC
ACNS
DIMO
HYOL
MT
HM
ILTI
RU
AP
CC
MGO/MGO-HEO
IN FEMICS =
WEIGHT NORM
(100.0)
2S.85
.30
25.48
37.33
.50
0.00
0.00
0.00
0.00
0.00
0.00
3.18o.oo
4.36
0.00
0.00
0.00
0.00
0.00
0.00
? 4t
NON-OXlDATION NORM
(KE2O3 CONVERTED TO FEO)
25.82
.30
25.63
37.55
.50
0.00
0.00
0.00
0.00
0.00
0.00
10.20
0.00
0.00
0.00
0.00
0.00
o.oo0.00
0,00
.16
374
37.6
TIP
C/FM
OZ
0.0
0.00
.02
130
3-COMPONENT
WT.PERCENTS
F 36.99
M 3.4?
A 59.59
F 38.03
C .70
A 61.27
N 50.00
K 48.86
C 1.14
1023
COMENuITE
11.19N 42.55E. HOL-HOLi
H. ARSANDAU,!, 1903A
,]I:UTI, AFAR AND I5SA
SI02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P205
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
75.90
0.00
11.50
3.40
.90
0.00
.10
0.00
4.00
4.40
0.00
1.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.20
wATEK-C02-FREE
(100.0)
75.75
o.oo11.48
3.39
.90
0.00
.10
0.00
3.99
4.39
0.00
SITI
ALFE3
FE2
MN
MG
CANA
KP
H*H-
Cs
ATOMS
HEIGHT
35.46
0.00
6.08
2.38
.70
0.00
.06
0.00
2.97
3.65
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.16
0.00
4.67
.88
.26
0.00
.05
0.00
2.67
1.94
0.00
0
CBOR
A8AN
NELC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CC
MGO/M60+FE0
IN FEMICS =
WEIGHT NORM
(100.0)
35.42
.13
26.03
33.87
0.00
0.00
0.00
o.oo0.00
0.00
0.00
.25o.oo
2.90
1.40
0.00
o.oo0.00
o.oo0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
32.57
.13
26.20
34.09
0.00
0.00
0.00
0.00
0.00
0.00
0.00
7.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.05
C/FM
OZ
0.00
189
3-COMPONENT
WT.PERCENTS
F 33.59
33.86
0.00
66.14
47.6?
52.3B
0.00
1024
COMENDITE
, HELAnALA, AFAR AND I5SA
H. ARSANDAUX. 1903A
SIO2
TI02
AL2O3
FE203
FEU
MNO
MGO
CAO
NA2O
KZO
P2O5
H2O+
H2O-
CO*
SO3
TOTAL
ORIGINAL
ANALYSIS
76.000.00
12.702.10
.60
0.000.00
.20
4.004.20
0.001.10
0.000.00
0.000.00
0.00
o.oo0.00
100.90
WATER-C02-FKEE
76.15
0.00
12.73
2.10
.60
0.00
0.00
.20
4.01
4.21
0.00
(100.0)
SI
Tl
AL
Ft3
Ft2
MN
MG
CA
NA
K
P
H*
H-
C
S
0
ATOMS
WEIGHT
35.510.00
6.721.47
.47
0.000.00
.14
2.973.49
0.00
.01
0.000.00
0.00
50.13
ATOMS
NUMBERS (100.0)
26.140.00
5.15
.54
.17
0.000.00
.07
2.671.84
0.00
63.41
0
CB
OR
AB
AN
NF
LC
AC
NS
DI
MO
HY
OL
MT
H:-t
IL
TI
RJ
Ai>
cc
MGO/MCO-M '.0
IH FEMCb =
WEIGHT NOHM
(100.0)36.15
1.19
24.9434.01
1.000.00
0.000.00
0.00
0.000.00
0.00
0.001.94
.77
0.00
0.00
0.000.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
34.35
1.19
25.05
34.14
1.00
0.00
0.00
0.00
0.00
0.00
0.00
4.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
C/FM
02
464
45.8
3-COMPONENT
WT.PERCENTS
F 74.77
24.32
1.80
73. 87
47.6??50.00
2.38
No. 1024
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1025
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1026
REMARKS: See under 1017. Published summation 101.6.
MINERALOGY: None given.
1025
[-OLER1TIC F'ASALT
09.13N 41.07E, HIRNA,
H. ARSANDAUX. 1903L.
SIU2
TIO2
AL2O3
FE203
FEOMNO
MSOCAO
NA20
K2O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
ORIGINAL
ANALYSIS
46.20
4.00
19.00
1.30
13.20
0.00
4.70
7.70
2.70
.70
0.00
1.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.00
HATER-C02-FREE
46.43
4.02
19.10
1.31
13.27
0.00
4.72
7.74
2.71
.70
0.00
(100.0)
SITI
ALFt3
FE2MS
Mi
CANA
KP
H*H-
CS
ATOMS
WEIGHT
21.58
2.40
10.05
.91
10.26
0.00
2.84
5.50
2.00
.58
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.23
1.12
8.35
.37
4.13
0.00
2.62
3.08
1.95
.33
0.00
0
CBOR
ASAN
NE
LCAC
NSDI
WO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
4.17
23.01
37.62
0.00
0.00
0.00
0.00
.55
0.00
15.47
9.45
1.90
0.00
7.63
0.00
0.00
0.00
0.00
.48
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
4.18
23.07
37.91
0.00
0.00
0.00
0.00
.56
0.00
12.97
13.67
0.00
0.00
7.65
0.00
0.00
0.00
0.00
.44
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
111
26
45
19
7
7
0
-19
9
8
9
4
15
37
2
UO
43
3-COMPONENT
WT
FM
A
FC
A
N
KC
O.I.
.PERCENTS
64.16
70.80
15.04
56.64
30.08
13.28
24.32
6.31
69.37
75.57
1026
DOLERITIC BASALT
09.08M 40.02E. AWARAMALKA,
H. ARSANDAUX? 1903B
KASSAM VALLEY* SHOA
SI02
TIU2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02503
TOTAL
ORIGINAL
ANALYSIS
46.30
l.RO
20.10
2.70
10.00
0.00
7.80
9.30
2.90
.70
0.00
.70
0.00
0.00
0.00
0.00
0.00
0.00
0.00
102.30
WATER-C02-FKEE
(100.0)
45.57
1.77
19.78
2.66
9.84
0.00
7.68
9.15
2.85
.69
0.00
SITI
ALFt3
F?2MN
MGCA
NAK
PH*
H-C
S
ATOMS
HEIGHT
21.63
1.08
10.63
1.89
7.77
0.00
4.70
6.65
2.15
.58
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
16.70
.49
8.55
.73
3.02
0.00
4.20
3.60
2.03
.32
0.00
0
CBOR
AB
ANNF.
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RU
APCC
MGO/MGO*FLO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
4.08
21.10
39.10
1.68
0.00
0.00
0.00
5.23
0.00
0.00
21.58
3.86
0.00
3.36
0.00
0.00
0.00
0.00
.66
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.10
18.13
39.30
3.36
0.00
0.00
0.00
5.33
0.00
0.00
26.41
0.00
0.00
3.38
0.00
0.00
0.00
0.00
.57
c
ALK.
C/FM
OZ
3-COMPONENT
MT.PERCENTS
F 52.70
M 32.37
A 14.94
49.61
36.33
14.06
22. 48
5.43
72.09
1027
rOLEFUTIC BASALT
. YAffLI. jIUTI, AFAR AND ISSA
H. ARSANDAUX. 1903n
SI02
TIU2
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H2U +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
46.60
1.40
18.80
.40
9.10
0.00
12.20
10.60
2.10
? 20
0.00
.10
0.00
0.00
o.oo0.00
0.00
0.00
0.00
101.50
WATER"
45.96
1.38
18.54
.39
8.97
0.00
12.03
10.45
2.07
.20
0.00
CO2?F^EE
(100.0)
SITI
AL
FE.3Ft2
MN
MCJ
CA
NAK.
PH*
H-C
S
ATOMS
WEIGHT
21.77
.84
9.95
.28
7.07
0.00
7.36
7.58
1.56
.17
0.00
.00
0.00
0.00
o.oo
ATOMS
NUMBEKS (100.0)
16.63
.38
7.91
.11
2.72
0.00
6.50
4.06
1.45
.09
0.00
0CB
OR
AnAN
NE
LCAC
NSDI
WO
HY
OL
NT
HM
ILTI
RU
APrc
MGO/NKjGtFEQ
IN FEMICS =
WEldHT NORM
(100.0)
0.00
0.00
1.17
16.88
40.69
.37
0.00
0.00
0.00
9.12
0.00
0.00
28.59
.57
0.00
2.62
0.00
0.00
0.00
0.00
.74
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
1.17
16.44
40.72
.61
0.00
0.00
0.00
9.14
0.00
0.00
29.30
0.00
0.00
2.62
0.00
0.00
0.00
0.00
.73
SIAL
FMC
ALK
KMG
TI
92
21
51
22
4
2
3-COMPONENT
WT.PERCENTS
F 39.5H
M 50.83
A 9.5H
F 42.41
C 47.3?
A 10.27
N 16.2R
K 1.55
C 82.17
No. 1027
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1028
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1029
REMARKS: See under 1017. Published summation 101.0.
MINERALOGY: None given.
1028
PORPHYRITIC BASALT
08.5SN 39.23E, BALCHI,
H. ASSANDAUX. 1903B
SI 02
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
47.30
3.40
17.80
4.20
11.50
0.00
4.50
7.10
2.80
1.10
0.00
1.60
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.30
WATER-C02-FREE
(100.0)
47.44
3.41
17.85
4.21
11.53
0.00
4.51
7.12
2.61
1.10
0.00
SI
TI
ALFt3
FE2MM
MbCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
22.10
2.04
9.42
2.94
8.94
0.00
2.71
5.07
2.08
.91
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.63
.95
7.82
1.1B
3.59
0.00
2.50
2.S4
2.02
.52
0.00
Q
CBOR
ABAM
NF
LCAC
NS01
WOHY
OLMT
HM
IL
TIRu
AP
CC
MGO/MGOtFtO
IN FLKICS =
WEIGHT NORM
(100.0)
0.00
0.00
6.53
23.81
32.82
0.00
0.00
0.00
0.00
2.15
0.00
21.51
.59
6.12
0.00
6.47
0.00
0.00
0.00
0.00
.55
NON-OXIDATION NORM
(FE2O3 CONVFMTED TO FEO)
0.00
0.00
6.59
24.00
33.08
0.00
0.00
0.00
0.00
2.21
0.00
13.66
13.93
0.00
0.00
6.52
0.00
0.00
0.00
0.00
.40
3-C0MP0NENT
WT.PERCENT5
F 65.15
M IB.67
A 16.18
F 58.80
C 26.59A 14.61
N 25.45
K 10.00
C 64.55
1029
PORPHYRITIC tjASAiT
oHISSI HILL. JIBUTI. AFAR AND ISSA
H. ARSANDAUX, 1903ti
SIU2
TI02
AL203
FE2O3
FEU
MNO
MGO
CAO
NA20
K2O
P205
H2O*
H2O-
CO2SO3
TOTAL
ANALYSIS
48.70
1.70
15.70
4.50
12.50
0.00
6.00
10.10
3.30
.50
0.00
1.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
104.00
HATER-C02-FREE
(100.0)
47.28
1.65
15.24
4.37
12.14
0.00
5.83
9.81
3.20
.49
0.00
SITI
ALFt3
FE2MN
MG
CANA
KP
H*H-
CS
ATOMS
WEIGHT
22.75
1.02
8.31
3.15
9.72
0.00
3.62
7.22
2.45
.42
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.65
.46
6.71
1.23
3.80
0.00
3.?5
3.92
2.32
.23
0.00
0
CB
ORA8
ANNE
LC
ACNS
01wo
HY
OL
MTHM
IL
TIRU
AP
CC
MG0/MGO*FEO
III FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
2.87
27.16
25.74
0.00
0.00
0.00
0.00
19.10
0.00
.47
15.18
6.35
0.00
3.13
0.00
0.00
0.00
0.00
.54
NON-OX IDAT I ON NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
2.90
22.58
25.96
2.60
0.00
0.00
0.00
19.56
0.00
0.00
23.22
0.00
0.00
3.16
0.00
0.00
0.00
0.00
.42
C/FM
QZ
3-COMPONENT
WT.PfcRCENTS
FM
A
F
CA
63.43
22.39
14.18
55.02
32.69
12.30
1030
PORPHYRITlc ANGKTH1TE BASALT
. GUBET <HARAp,
H. ARSANDAUX, 1903ft
AFAR AND ISSA
SIU2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAU
NA20
K20
P205
H20 +
H20-
C02
S03
TOTAL
OKIGINAL
ANALYSIS
48.90
1.40
18.90
.30
9.000.00
6.0012.20
3.00
.30
0.00
.50
0.000.00
0.00o.oo
o.ooo.oo
0.00
100.SO
HATER-C02-FREE
(100.0)
48.90
1.40
18.90
.30
9.00
0.00
6.00
12.20
3.00
.30
0.00
SI
TI
AL
FE3
FE2
MN
MG
CA
NA
K
P
H*
H-
C
S
0
ATOMS
WEIGHT
22.85
.84
10.00
.21
7.000.00
3.628.72
2.23
.25
0.00
.01
0.000.00
0.00
44.79
ATOMS
NUMBERS (100.0)
17.80
.38
8.11
.08
2.740.00
3.264.76
2.12
.14
0.00
60.61
WEIGHT NOPM
0
0
1
22
37
1
(100.0)
.00
.00
.78
.97
? 19
.34
IL
TI
RU
^p
cc
M'lO/M&O+FtU
lit FEMC5 =
2.66
0.000.00
0.00
0.00
.58
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
1.78
22.63
37.21
1.53
0.00
0.00
0.00
19.42
0.00
0.00
14.78
0.00
0.00
2.66
0.00
0.00
0.00
0,00
.57
C
ALK
MG
TI
C/FM
QZ
111
25.
38.
3-COMPONENT
WT.PERCENTS
F 50.00
M 32.26
A 17.74
F 37.50
C 49.19
A 13.31
N 19.35
K 1.94
C 78.71
No. 1030
REMARKS: See under 1017.
MINERALOGY: Phenocrysts: Large anorthites.
No. 1031
REMARKS: See under 1017.
MINERALOGY: None given.
No. 1032
REMARKS: See under 1017.
MINERALOGY: Phenocrysts: Labradorite.
1031
OOLERITIC BASALT
O9.OIN 40.30E, KARAKURKURA,
H. ARSANDAUX. 19031)
CHERCHER. HAKARoE
SI02
TIO2
AL2O3
FE2O3
FEO?no
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49.20
2.30
18.00
3.10
6.90
0.00
4.90
8.BO
2.70
.70
0.00
1.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.10
V.ATER-C02-FREE
(100.0)
49.90
2.33
18.26
3.14
9.03
0.00
4.97
8.92
2.74
.71
0.00
SITI
AL
FE3FE2
MM
Mb
CANA
KP
H+
H-C
5
ATOMS
WEIGHT
22.99
1.38
).52
.17
>.92
).00
.96
>.29
.00
.58
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0
18.26
.64
7.87
.87
2.77
0.00
2.72
3.50
1.94
.33
0.00
0C3
ORAB
ANNE
LCAC
NS
DI
MOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
1.88
0.00
4.21
23.22
35.40
0.00
0.00
0.00
0.00
7.38
0.00
18.92
0.00
4.57
0.00
4.43
0.00
0.00
0.00
0.00
.62
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.23
23.36
35.61
0.00
0.00
0.00
0.00
7.56
0.00
20.60
4.19
0.00
0.00
4.45
0.00
0.00
0.00
0.00
.48
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
122
26.4
42.5
23.5
7.6
.15
.43
4.3
0.00
.55
-8
3-COMPONENT
WT.PERCENTS
F 59.11
M 24.14
A 16.75
F 49.59C 36.36
A 14.05
5.74
72.13
1032
P0RPHYRIT1C BASALT
09.44N 42.08E, jlLDESSA, HARARGE
H. ARSANDAUX. 1903b
SI02
TIU2
AL2O3
FE203
FEuMNO
MGOCAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49.30
3.90
16.00
3.30
11.10
0.00
5.20
8.60
2.90
.60
0.00
.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.40
KATER-C02-FKEE
(100.0)
48.86
3.87
15.86
3.27
11.00
0.00
5.15
8.52
2.87
.59
0.00
SITI
ALFE3
FE2
MN
MGCA
NA
K
P
H*
H-
CS
ATOMS
HEIGHT
23.03
2.34
8.47
2.31
8.63
0.00
3.14
6.15
2.15
.50
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.10
1.08
6.92
.91
3.41
0.00
2.85
3.38
2.07
.28
0.00
0CB
OR
ASAN
NELC
ACNS
DI
WO
HY
OL
fT
HM
IL
TIRU
AP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
1.66
0.00
3.52
24.37
28.58
0.00
0.00
0.00
0.00
11.36
0.00
18.41
0.00
4.75
0.00
7.34
0.00
0,00
0.00
0.00
.60
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.54
24.52
28.76
0.00
0.00
0.00
0.00
11.64
0.00
18.95
5.21
0.00
0.00
7.38
0.00
0.00
0.00
0.00
.47
SIAL
FMC
ALK
KMG
TIP
C/FM
OZ
119
22.a
47.2
22.3
7.7
.12
.40
7.1
0.00
.47
-12
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
KC
62.34
22.51
15.15
54.34
32.45
13.21
23.97
4.96
71.07
1033
PORPHYRITIC ilASALT
09.01.N 40.30E, kAPAKURKURA, CHERCHER, HARARGE
H. ARSANDAUJH 1903b
SI02
T1U2
AL203
FE2O3
FEU
MNO
MGO
CAO
NA20
K20
P205
H20+
H20-
C02
S03
TOTAL
OK It IN As
ANALYSIS
49.80
3.P0
17.90
2.90
11.50
0.00
4.?0
7.10
3.20
.80
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.60
k,ATER-C02-Ft<EE
(100.0)
49.02
3.74
17.62
2.85
11.32
0.00
4.53
6.99
3.15
.79
0.00
SITI
ALFE3
FE2
MN
Mi
CANA
KP
H*
H-C
s
0
ATOMS
wElGHT
23.27
2.28
9.47
2.03
8.94
0.00
2.77
5.07
2.37
.66
0.00
0.00
0.00
0.00
0.00
44.73
ATOMS
NUMBERS (100.0)
18.08
1.04
7.66
.79
3.50
0.00
,2.49
2.76
2.25
.37
0.00
61.05
0
C3
0*
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HIIL
TI
RU
AP
CC
MG0/M60+FE0
IN FEMICS =
ntlGHT HORN
(100.0)
.89
0.00
4.66
26.71
31.58
0.00
0.00
U.OO
0.00
2.63u.oo
22.26
0.00
4.15
0.00
7.10
0.00
0.00
0.00
u.oo
.55
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)0.00
0.004.69
26.8531.75
0.000.00
o.oo0.00
2.680.00
20.646.25
0.000.00
7.140.00
0.000.00
0.00
c
ALK
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
62
20
17
56
27
15
.61
.00
.39
? 47
.84
.69
No. 1033
REMARKS: See under 1017.
MINERALOGY: Phenocrysts: Labradorite.
No. 1034
REMARKS: See under 1017.
MINERALOGY: None given.
OTHER INFORMATION: Location uncertain.
No. 1035
REMARKS: CO2 and SO_ traces. The analyses of
Manasse (1908, 1909, 1917) tend to have high summations;
loss on heating is given under I^O plus; otherwise these
analyses appear to be of good quality.
MINERALOGY: Phenocrysts: Zoned bytownite, with
margins of andesine-labradorite; rare titanaugite and
very rare iron-rich olivine. Groundmass: Labradorite,
green pyroxene, altered Fe-rich olivine, magnetite,
ilmenite, apatite and glass. Fluidal texture.
1034BASALT
09.4RN 42.08E,
H. ARSANDAUX.
ARTO
1903B
SIO2
TIO2
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K2U
P205
H2O +
H2O-
CO2
SO3
TOTAL
OklGlNAi
ANALYSIS
50.101.30
19.601.80
9.500.00
4.907.10
3.101.20
o.oo1.50
0.000.00
0.000.00
0.000.00
0.00
100.10
wATER-C02-F*EE(100.0)
50.811.32
19.881.83
9.630.00
4.977.20
3.141.22
0.00
SITI
ALFE3
Ft2MN
Mt>CA
NAK
P
H +
H-C
s
ATOMSHEIGHT
23.41
.78
10.371.26
7.380.00
2.965.07
2.301.00
0.00
.02
0.000.00
0.00
ATOMSNUMBERS (100.0)
18.44
.36
8.50
.50
2.930.00
2.692.80
2.21
.56
0.00
0CB
ORAR
ANNE
LC
ACNS
DI
WO
HY
OLf?T
HMIL
TIRU
AP
CC
MGO/MGO+FLO
IN FEMCb =
WEIGHT .NORM(100.0)
0.00
.26
7.2126.66
35.810.00
0.00
0.000.00
0.000.00
20.604.32
2.650.00
2.50
0.000.00
0.000.00
.54
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
.26
7.2326.75
35.930.00
0.00
0.000.00
0.000.00
17.2710.04
0.000.00
2.51
0.000.00
0.000.00
.47
c
ALK
3-COMPONENT
WT.PERCENTSF 55.12
M 23.90A 20.98
F 49.78
C 31.28A 18.94
N 27.19K 10.53
C 62.28
1035
PORPHYRITIC dASALl
F. MANASSt, 1908
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20*H20-
C02
503
TOTAL
OKICIUAL
ANALYSIS46.60
1.9815.06
12.266.15
.71
2.58
9.663.69
.97
.44
.60
0.00o.oo
0.000.00
0.000.00
0.00101.10
nATLR-C02-Ft<EE(100.0)
46.461.97
15.0112.22
6.13
.71
2.57
9.633.88
.97
.44
SITI
ALFE3
Ft2MN
MG
CANA
KP
H+
H-C
S
ATOMS
WEIGHT21.77
1.197.97
8.574.78
.55
1.56
6.902.89
.81
.19
.01
0.000.00
0.00
ATOMSNOiRERS (100.0)
17.50
.56
6.673.47
1.93
.23
1.45
3.H92.83
? 47
.14
0CB
ORAH
ANNE
LC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGC+FEO
IN FEhlCS =
WEIGHT NORM
(100.0)
2.00
0.00
5.73
32.87
20.66
0.00
0.00
0.00
0.00
13.85
2.86
0.00
0.00
16.40
.94
3.75
0.00
0.00
.96
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
5.8622.46
21.156.07
0.00
0.000.00
21.820.00
0.00
17.820.00
0.003.83
0.000.00
.98
0.00
.23
SIAL
FMC
ALK
no20.9
44.424.4
10.3
C/FM
OZ
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
71.229.9R
IB.80
S5.91
79.3314.76
26.79
6.6866.53
1036
TRACHYANDESITE
F. HAnASSt. 1908
SI02
TI02
AL2O3
FE2O3
FEO
MNU
MGUCAO
NA2O
K20
P205
H2O+
H2O-
CO2
SO3
TOTAL
0CR
OR
AO
ANNE
LCAC
NSDI
WO
HY
OL
MT
H-l
ILTI
RU
AP
CC
Iti FtMCS =
OHIGINAL
ANALYSIS
59.56
? 31
13.94
5.82
2.98
.48
.61
4.72
6.05
3.01
.11
2.31
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.90
WEIGHT NORM
(100.0)
6.10
0.00
18.27
52.57
1.96
0.00
0.00
0.00
0.00
5.39
6.19
0.00
0.00
8.67
0.00
.60
0.00
0.00
.25
0.00
.66
KATER-C02-FKEE
(100.0)
61.03
.32
14.28
5.96
3.05
.49
.63
4.84
6.20
3.08
.11
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
18.48
53.18
1.98
o.oo
0.00
0.00
0.00
19.03
0.00
5.80
.67
0.00
0.00
.61
0.00
0.00
.250.00
.12
SITI
ALFE3
FE2MN
MG
Cft
NAK
PH?
H-C
S
0
ATOMS
WEIGHT
27.83
.19
7.38
4.07
2.32
.37
.37
3.37
4.49
2.50
.05
.03
0.00
0.00
0.00
46.95
NIGGLI
SIAL
FM
CALK
K.
MG
TIP
C/FM
QZ
ATOMS
NUMBERS
21.81
.09
6.02
1.61
.91
.15
.33
1.85
4.30
1.41
.03
61.49
?03
28.0
28.0
17.3
26.6
.25
.11
? H
.16
.62
-3
(100.0)
3-COMPONENT
WT.
FM
A
FC
A
NK
C
D.I.
.PERCENTS
47.64
3.30
49.05
38.97
20.90
40.17
43.90
71.84
34.25
93.52
No. 1036
REMARKS: See under 1035. SO trace.
MINERALOGY: Phenocrysts: Very rare oligoclase.
Groundmass: Oligoclase, sanidine, accessory diopside-
augite, acmite, magnetite, limonite.
No. 1037
REMARKS: See under 1035. CO2 trace.
MINERALOGY: Phenocrysts: Very rare oligoclase.
Groundmass: Oligoclase, sanidine ("not nepheline"),
green non-pleochroic augite-diopside; accessory glass,
magnetite, apatite, calcite, acmite(?).
No. 1038
REMARKS: See under 1035. SO- trace.
MINERALOGY: Phenocrysts: Zoned bytownite-oligoclase,
chiefly andesine-labradorite; rare augite-diopside.
Groundmass: Yellow-grey crystallite base composed of
green non-pleochroic pyroxene, glass, apatite, rare
tridymite, altered olivine, feldspar.
OTHER INFORMATION: Another specimen with SiO,
6319% contains chalcedony, tridymite, labradorite-
bytownite.
1037
APHYR1C TKACHYAN.jtSITE
, ADEN
E. MANASSE, 1908
SIO2
TI02
AL203
FE203
FEOMNO
MGOCAO
NA2O
K2O
P205
H20*
H2O-
CO2SO3
TOTAL
OR1GI;.AL
ANALYSIS
60.75
.46
14.50
6.18
2.94
.55
.43
3.36
5.88
3.74
.25
1.44
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.46
WATER-C02-FKEE
(100.0)
61.34
.46
14.64
6.24
2.97
.56
.43
3.39
5.94
3.78
.25
SI
TlAL
FE3Ft2
HNM6
CANA
KP
H*H-
C
s
ATOMS
HEIGHT
28.38
.28
7.67
4.32
2.29
.43
.26
2.40
4.36
3.10
.11
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0
21.91
6
1
1
4
1
.12
16
68
89
17
23
30
11
72
08
WEIGHT NORM
(XOO.O)
CO
OR
NE
LC
AC
NS
DI
WO
cc
MGO/MGOfFEO
IN FLMICS =
22.37
50.35
2.07
3.40
3.61
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
.92
0.0022.64
50.96
2.09
0.00
0.00
0.000.00
11.89
0.0010.05
0.00
0.00
0.00.89
0.00
0.00
SIAL
FMC
ALKK
M6TI
P
C/FM
OZ
213
30.0
2B.9
12.7
28.4
.30
.OR
1.2
.37
.44
-1
3-COMPONENT
WT.PERCENTS
F 47.57
M 2.24
A 50.18
F 41.27
C 15.20
A 43.53
N 45.30
K 28.81
C 25.89
1038
AuGITt TRACHYOACITE
, ADEN
E. MANASSL, 1908
SI02
TI02
AL203
FF203
FEO
MNO
MGO
CAO
NA20
K2U
P205
H20*
H20-
C02
S03
OKIGINAL
ANALYSIS
64.76
.31
13.40
4.48
2.26
? 31
.39
2.57
5.65
4.10
0.00
1.21
0.00
0.00
o.oo
WATER-C02-FHEE
65.93
.32
13.64
4.56
2.30
.32
.40
2.62
5.75
4.17
0.00
(100.0)
SITI
ALFE3
FE2MN
M&CA
NAK
P
ATOMS
HEIGHT
30.26
.19
7.09
3.13
1.76
.24
? 24
1.84
4.19
3.40
0.00
ATOMS
NUMBERS (100.0)
23.26
.08
5.67
1.21
.68
.09
.21
.99
3.94
1.88
0.00
0
C3OR
ABAN
NELC
ACNS
DlMO
HYOL
MT
ILTI
RJ
AC
CC
MGO/MGO+FEO
IN FEMICS =
WtlGHT NOUM
(100.0)
12.89
0.00
24.73
46.H9
0.00
0.00
0.00
1.67
0.00
4.02
3.40
0.00
0.00
5.79
0.00
.60
0.00
0.00
0.00
0.00
.57
NON-OX IDAT ION NORM
(FE2O3 CONVERTED TO FEO)
9.02
0.0024.95
47.30
0.00
0.00
0.00
0.00
.4411.55
0.00
6.130.00
0.00
0.00.60
0.00
0.00
0.00
0.00
.10
SIAL
FMC
ALK
260
31.7
24.6
11.1
32.6
3-C0MP0NENT
WT.PERCENTS
F 39.93
35.36
13. 4fi
51.15
45.86
33.2R
20.86
1039
APHYR1C TkACHyTt
F. MANASSL. 1908
SI02
TIU2
AL<!03
FE2O3
FEO
MNO
*GO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
S03
TOTAL
ANALYSIS
67.44
0.00
11.59
4.48
1.35
.34
.37
2.08
6.68
4.24
.12
.62
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.31
*ATER-C02-FREE
(100.0)
68.34
0.00
11.74
4.54
1.37
.34
.37
2.11
6.77
4.30
.12
SI
Tl
AL
FL3
FE2
MN
MCJ
CA
NA
K
P
H*
H-
C
S
ATOMS
WEIGHT
31.51
0.00
6.13
3.13
1.05
.26
.22
1.49
4.96
3.52
.05
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
23.96
0.00
4.85
l.?0
.40
.10
.20
.79
4.60
1.92
.04
0
C?
OR
A13
AN
NE
LC
AC
N5
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MOO+FEO
IN htKICS =
fcElSHT NORM
(100.01
15.09
0.00
25.46
36.44
0.00
0.00
0.00
13.17
1.40
7.96
.21
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.27
0.00
.2fi
NON-OXIDATION NORM
(FE2O3 cONvEkTED TO FEO)
17.29
0.00
25.68
36.76
0.00
0.00
0.00
0.00
4.92
8.66
0.00
6.41
0.00
0.00
0.00
0.00
0.00
0.00
.27
0,00
.11
.9
.7
.5
.0
.29
.10
.0
.22
.42
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
D.I.
34.05
2.16
63.79
30.96
11.05
57.99
51.38
32.62
16.00
94.03
No. 1039
REMARKS: See under 1035.
MINERALOGY: Fresh, very fine-grained rock with a
trachytic texture. Groundmass: Aegirine-augite,
aegirine, alkali feldspar, katophorite and/or acmite,
cossyrite, rare tridymite; no feldspathoids.
No. 1040
REMARKS: See under 1035.
MINERALOGY: Phenocrysts: Anorthoclase, rare sanidine
and aegirine-augite. Groundmass: Dark brown glass
(n = 1.512-1.5 20); spherulites of feldspar microlites;
green pyroxene, cossyrite, rare magnetite and apatite.
OTHER INFORMATION: This rock contains schlieren,
the mineralogy of which is identical with the host. Two
specimens gave SiO~ contents of 69.42% and 71. 66%,
the latter bearing some chalcedony.
No. 1041
REMARKS: See under 1035.
MINERALOGY: Groundmass: Chloritised andesine,
titan-augite, rare barkevikite and biotite?; abundant
magnetite, leucoxene (from ilmenite); common apatite;
rare pyrite; analcime and natrolite.
OTHER INFORMATION: The analcime may be derived
from nepheline, and has the composition:
SiO2
A12?
Fe2?3
MgO
CaO
56.24
21.68
tr.
tr.
0.33
Na2?
K2O
H2O
total
n = 1.
13.
0.
8.
100.
4837
30
42
40
37
Dainelli and Marinelli (1912), who collected the Eritrean
specimens analysed by Manasse, state that this
teschenite was taken from a lithological lens in the
PreCambrian basement. There remains some doubt
about this; however, see Comucci (1948).
1040
P0RPHVRIT1C PANTELLEPITE (WELDED TUFF)
? ADEN
E. MANASSE, 1908
SI02
TI02
AL203
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02503
TOTAL
ORIGINAL
ANALYSIS
68.04
0.00
12.10
3.18
1.90
.20
.19
.82
5.53
4.50
0.00
3.40
0.00
0.00
0.00
0.00
o.oo
0.00
0.00
99.86
k,ATER-C02-FREE
(100.0)
70.54
0.00
12.54
3.30
1.97
.21
.20
.85
5.73
4.67
0.00
SiTl
AL
FE3FE2
MM
Mo
CANA
KP
H*H-
C
S
AT0M5
WEIGHT
31.79
0.00
6.40
2.22
1.48
.15
.11
.59
4.10
3.74
0.00
.04
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.60
0.00
5.16
.87
.SB
.06
.10
.32
3.88
2.08
0.00
0
CBOR
ABAN
HELC
ACNS
DIWO
HY
OLMT
HM
ILTI
RU
AP
CC
MGO/MGC-tFLG
1H Ftf-ilCS =
HEIGHT NORM
(100.0)
18.52
0.00
27.65
38.51
0.00
0.00
0.00
8.92
0.00
3.70
0.00
2.38
o.eo
.32o.oo
0.00
0.00
0.00
0.00
0.00
.1*
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
19.80
0.00
27.82
38.75
0.00
0.00
0.00
0.00
2.37
3.76
0.00
7.49
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.07
c
ALIC
C/FM
Ql
3-COMPONENT
WT.PERCENTS
F 33.20
M 1.24
A 65.56
F 31.89
50.97
41.47
1041
TESCHtNITL (POSSIbLY FIASLI
15.37N 39.23E, HACASAT,
E. MANASSL, 1909
MASSA(,,A, ERITREA
SI02
TI02
AL2O3
FE2O3
FEU
MNO
MGU
CAO
NA2O
K2O
P2O5
H2O +
H2O-
CO2
SO3
TOIAL
ANALYSIS
46.20
.76
16.01
5.08
7.01
.16
5.07
7.09
6.50
2.04
.51
4.31
0.00
.210.00
0.00
0.00
0.00
0.00
100.95
lvATER-CO2-FKEE(loo.o)
47.91
.79
16.60
5.27
7.27
.17
5.26
7.35
6.74
2.12
.53
SITl
ALFt3
Ft2MN
MG
CANA
KP
H*
H-C
S
ATOMS
HEIGHT
21.58
.46
8.47
3.55
5.45
.12
3.06
5.07
4.82
1.69
.22
.05
0.00
.06
0.00
ATOMS
NUMBERS (100.0)
17.51
.22
7.15
1.45
2.23
.05
2.87
2.88
4.78
.99
.16
0CB
ORAB
ANNE
LC
ACNS
DIWO
HYOL
MTHM
ILTI
RU
APCC
MGO/MGO+FEO
I N FEMCS =
HEIGHT NORM
(100.0)
0.00
0.00
12.50
20.61
8.70
19.62
0.00
0.00
0.00
lb.97
0.00
0.00
H.A3
7.64
0.00
1.49
0.00
0.00
1.15
.50
.68
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
12.63
14.90
8.79
23.13
0.00
0.00
0.00
19.75
o.oo
0.00
17.63
0.00
0.00
1.51
0.00
0.00
1.17
.50
.46
SIAL
FMC
ALKK
MG
TlP
C/FM
OZ
no22.4
41.418.1
18.1
.17
.43
1.4
.51
.44
-63
3-COMPONENT
WT.PERCENTS
F 47.04
M 19.73
A 33.23
F 43.61
C 25.5H
A 30.81
N 41.59
K 13.05
C 45.36
OLIVINE BASALT
15.ION 38.55E. MAPAHAN-OI (,AALA VALLEY, SOUTH OF ASMARA, ERITREA
F. MAi<ASSE? 1909
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGU
CAO
NA20
K20
P205
H20+
H20-
C02
503
TOTAL
0
a
OR
AR
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H"<
IL
TI
RU
AP
CC
MGO/Vi&OFfO
IN FEHICS =
ORIGINAL
ANALYSIS
46.96
1.45
15.19
8.35
7.30.12
6.63
8.34
4.53
? 59
.17
1.09
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.72
IN EIGHT MOP. 11
(100.0)
o.oo0.00
3.51
32.19
19.39
3.44
0.00
0.00
0.00
16.92
0.00
0.00
9.24
12. 18
0.00
2.76
0.00
0.00
.37
0.00
.83
WATER-CO2-FHEE
(100.0)
47.13
1.46
15.25
8.38
7.33.12
6.65
8.37
4.55
.59
.17
NON-OXIDATION NORM
(FE203 CONVEKTED TO FEO)
0.00
0.00
3.56
22.90
19.71
8.61
0.00
0.00
0.00
18.06
0.00
0.00
23.77
0.00
0.00
2.81
0.00
0.00
.38
0.00
.48
SI
TI
AL
FE3
FE2
MN
MG
CA
NA
<
P
Ht
H-
C
s
0
ATOMS
WEIGHT
21.94
.87
8.04
5.84
5.67
.09
4.00
5.96
3.36
.49
.07
.01
0.00
0.00
0.00
44.37
NIGGL1
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
ATOMS
NUMHEKS (100.0)
17.41
.40
6.64
2.33
2.27.04
3.67
3.31
3.26
.20
.05
60.33
104
19
49
19
10
2
8
7
9
b
08
44
4
16
40
-38
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
57. 12
24.20
18.69
53.76
76.65
17.59
33.66
4.38
61.96
No. 1042
REMARKS: See under 1035.
MINERALOGY: Aphyric. Groundmass: Labradorite,
titanaugite, altered olivine, magnetite, ilmenite, rare
apatite.
OTHER INFORMATION: Doleritic olivine basalts from
Shicket (15. ION, 38.51E) contain amygdale zeolites
which have been analysed:
(1) (2) (3)
52.84 41.30
tr. 29.49
24.46 11.61
tr. 5.11
5.42 tr.
16.48 13.32
99.20 100.83
(1) chabazite (2) apophyllite (3) thomsonite.
No. 1043
REMARKS: See under 1035.
SiO2
A12?3
CaO
Na2O
K2?
H2O
Total
46.69
20.27
9.72
0.96
tr.
22.80
100.44
MINERALOGY: Scoriaceous rock. Phenocrysts: Augite,
corroded olivine. Groundmass: Glass, labradorite,
pyroxene, olivine?, ilmenite and magnetite, calcite,
apatite..
No. 1044
REMARKS: See under 1035. Published summation
101.49% can be accounted for by adding CO, content to
"loss on heating. "
MINERALOGY: Groundmass: Labradorite-bytownite,
abundant titanaugite, barkevikite, magnetite, ilmenite,
accessory apatite, calcite, serpentinite.
OTHER INFORMATION: Manasse also describes an
augitic camptonite from Suru in the Comayli Valley,
due west of Arafali.
1043
PORPHYRITIC O|_IVINL HASAI T
14.52N 39.54E, ALID VOLCANO, ERITREA
E. MANASSE. 1909
SI 02
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H2U-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
48.50
2.23
12.32
10.87
5.33
0.00
5.36
10.42
3.45
1.74
.24
.39
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.85
WATER-C02-FKEE
48.28
2.22
12.26
10.82
5.31
0.00
5.34
10.37
3.43
1.73
.24
(100.0)
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-c
s
ATOMS
WEIGHT
22.66
1.34
6.52
7.60
4.14
0.00
3.23
7.45
2.56
1.44
.10
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.04
.62
5.40
3.05
1.6.6
0.00
2.98
4.15
2.49
.83
.08
0
Cf)OR
AB
ANNE
LC
ACNS
DIMO
HYOL
MT
HMIL
TIRU
?ttlGHT NORM
(100.0)
0.00
0.00
10.26
29.05
12.e9
.03
0.00
0.00
0.00
28.73
.15
0.00
0.00
10.70
3.46
4.21
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
10.47
18.30
13.16
6.19
0.00
0.00
0.00
32.04
0.00
0.00
15.01
0.00
0.00
4.30
0.00
0.00
TI
P
C/FM
3-COMPONENT
WT.PERCENTS
F 60.56
M 20.04
A 19.40
F 50.93C 32.76
A 16.37
N 22.10
K 11.15C 66.75
CC
MGO/MGO+FEO
IN FEMICS =
1044
CAMPTONITt DYKE
15.04N 39.31E.
E. MANASSC 1909
MAI ENDA MARUGLO, COMAYLI RIVER. ERITREA
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
0R1GINA
ANALYS1
I
i
).O3
.48
.10
r.64
J.B7
).00
>.56
.02
..21
.67
.22
..35
.00
.17
).00
).00
).00
VJATER-C02-FHEE
(100.0)
50.65
2.56
12.50
7.B9
4.00
0.00
6.78
9.32
4.35
1.73
.23
SI
TIAL
Ft3
Ft2MN
MGCA
NAK
P
ATOMS
WEIGHT
22.91
1.49
6.40
5.34
3.01
0.00
3.96
6.45
3.12
1.39
.10
ATOMS
NUMBERS 1100.0)
18.54
.71
5.39
2.18
1.23
0.00
3.70
3.66
3.09
.81
.07
0
CBOR
AB
ANNE
LCAC
NS
01wo
HY
OLMT
HM
ILTI
RU
AP
CC
MGO/MGO+FEO
IN FEMCS =
WEIGHT NORM
(100.0)
0.00
0.00
10.09
36.43
9.32
0.00
0.00
0.00
0.00
21.45
0.00
1.48
3.70
5.42
4.07
4.BO
0.00
0.00
.49
2.72
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
10.25
30.54
9.47
3.49
0.00
0.00
0.00
23.05
0.00
0.00
15.07
0.00
0.00
4.88
0.00
0.00
.50
2.76
.60
C/FM
QZ
120
17.
3-COMPONENT
WT.PERCENTS
F 48.06
M 27.39
A 24.55
F 43.5B
C 34.15
A 22.26
N 28.26
K 11.21
C 60.54
PORPHYRITIC OLIVINL fcASAlT
14.30.4 40.10E, 1-lARAHO VOLCANO, ERITREA
f. MANASSt, 1909
SI02T102
AL203FE2O3
FEO
MNO
MGG
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
OklGI'lAt
AUALYSI5
i.0.19
2.24
15.34
7.43
4.65
0.00
6.69
11.32
1.62
.63
.14
.34
CJ.00
0.00
0.00
0.00
0.00
0.00
0.00
100.79
WATER-C02-FKEE
(100.0)49.97
2.23
15.277.40
4.630.00
6.66
11.271.81
.63
.14
SITI
ALFE3
FE2MN
Mb
CANA
KP
H*H-
C
S
0
ATOMS
WEIGHT
23.451.34
8.125.20
3.610.00
4.04
8.091.35
.52
.06
.00
0.000.00
0.00
45.01
ATOMSNUMBERS (100.0
18
6
2
1
0
3
4
1
32
62
60
04
4?
00
65
43
29
29
04
61.30
0
CBOR
ABAN
NELC
ACNS
DIWO
HY
OL
MT
It
TIRU
APCC
MGO/MGO.FEO
IN FEMICS =
AtlSHT HOHK(100.0)
H.230.00
3.71
15.3631.66
0.000.00
0.000.00
18.330.00
8.12
0.00a.49
1.564.23
0.000.00
.30
0.00
I.00
NOH-OXlDATION NORM NIGGLI
(FE2O3 CONVEKTED TO FEO)
1.02 SI
0.00
3.77
15.58 <
32.12 /
0.00 ?
\L
'M
*LK
0.00 MG
0.00 TI
0.00 P
19.73 C/FM
0.00 OZ
23.18
0.00
0.00
0.00
4.29
0.00
0.00
.31
0.00
.58
117
21.1
45. 5
28.4
5.1
. i<;
.5
3.9
.14
.&;
-3
3-COMPONENT
WT.PERCEMS
F 56.93
M 31.53
A 11.55
,73
No. 1045
REMARKS: See under 1035. MnO trace.
MINERALOGY: Calcitic scoria. Phenocrysts: Zoned
bytownite-labradorite. Groundmass: Abundant brown
glass with minute iron-oxide crystals; An60-65, olivine,
pyroxene, magnetite, ilmenite.
OTHER INFORMATION: Some associated tuffs bear
43.06% SiO~. Extra basalt SiO_ determinations from
Manasse (1904, 1908, 1909). See also under 1001.
Porphyritic olivine basalt: Hyalobasalt:
Mt. Surrisan 48.78% Mt. Daggaro 49.25%
Mt. Darcot 48.31%
Mt. Carallumto 49.24%
Mt. Coma Chari 47.36%
No. 1046
50.68%
51.52%
SE flank Mt. Alid 50. 79%
REMARKS: See under 1035. Cl trace.
MINERALOGY: Groundmass: Dominant alkali feldspar
microlites; very small nephelines; wohlerite (rather than
lavenite); non-titaniferous magnetite; scarce apatite,
sodalite.
OTHER INFORMATION: For comments on the occur-
rence of wohlerite, see Rodolico & Pieruccini (1942,
p. 800-801).
No. 1047
REMARKS: See under 1035. MgO and P?O,. traces.
MINERALOGY: White porcellanous rock. Groundmass:
Pale yellow glass, sanidine, anorthoclase, magnetite,
zircon.
OTHER INFORMATION: Occurs intercalated in doleritic
basalts. Silicic tuff from between the Mesozoic sand-
stone and the basalts at Adi Quala yielded SiO? 71. 10%.
1046
TINGUAITh DYKL
14.40N 39.04E.
E. MAHAS5C, 1909
AZEO. HASAKO. ERITREA
SI02
TIO2
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K?U
P2O5
H20*
H2O-
C02
503
TOTAL
ORIGINAL
ANALYSIS
55.38
0.00
18.46
4.72
6.28
.19
1.19
3.93
7.55
2.94
.42
.36
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.42
UATER-CO2-FKEE
(100.0)
54.80
0.00
18.27
4.67
6.21
.19
1.18
3.89
7.47
2.91
.42
SITI
AL
Ft3FE2
MMM6
CANA
KP
H?H-
C
s
ATOMS
WEIGHT
25.87
0.00
9.77
3.30
4.68
.15
.72
2.81
5.60
2.44
.18
.00
0.00
0.00
0.00
ATOMS
NUMRERS (100.0)
19.69
0.00
7.73
1.26
1.87
.06
.63
1.50
5.21
1.33
.13
0
CROR
AB
ANNE
LCAC
NS
DIWO
HYOL
MT
ILTI
RU
AP
CC
MGU/MOO+K.O
IN FfcNICS =
wtlGHT MORM
(100.0)
0.00
0.00
17.23
43.62
7.63
10.58
0.00
0.00
0.00
7.92
0.00
0.00
5.13
6.79
0.00
0.00
0.00
0.00
.91
o.oo
.33
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
17.39
38.79
7.70
13.61
0.00
0.00
0.00
8.15
0.00
0.00
13.45
0.00
0.00
0.00
o.oo0.00
.92
0.00
.17
C/FM
OZ
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
N
KC
48.50
5.25
46.25
43.27
15.46
41.27
52.36
20.39
27.25
1047
TRAfHYTIC TUFF
14.55N 38.50E,
E. MANASSt. 1909
MAI MEIERE, ADI UGR1? ERITREA
SI02
TI02
AL203
FE203
FEO
MNO
MflO
CAO
NA20
<20
P2O5
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
61.28
0.00
21.94
.48
0.00
0.00
0.00
.61
3.37
2.58
0.00
9.64
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.90
^,ATER-C02-FkEE
67.89
0.00
24.31
.53
0.00
0.00
0.00
.68
3.73
2.86
0.00
(100.0)
SITI
AL
FE3Ft2
MN
M(j
CA
NA
KP
H*
H-C
S
ATOMS
WEIGHT
28.63
0.00
11.61
.34
0.00
0.00
0.00
.44
2.50
2.14
0.00
.11
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
23.07
0.00
9.73
.14
0.00
0.00
0.00
.25
2.46
1.24
0.00
0
CFi
ORAB
ANNE
LC
ACNS
DI
noHY
OLMT
HM
ILTI
RU
AP
CC
MflO/MGO-ff-EO
IN FEhlCS =
V.E1GHT NORM
(100.0)
33.65
13.63
16.94
31.68
3.36
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.53
0.00
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
33.33
13.85
16.96
31.71
3.37
0.00
0.00
0.00
0.00
0.00
0.00
.79
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
C/FM
OZ
3-COMPONFNT
WT.PERCENTS
F 7.47
M 0.00
A 92.53
F 6.8?C 8.66
A 84.5?
N 51.37K 39.33
C 9.30
14.43N 39.25E.
E. MANASSE, 1909
SENAFI, ERITREA
5I0Z
TI02
AL2O3
FE2O3
FEO
MNO
??G0
CAO
NA<!0
K20
P205
H2G*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
70.36
0.00
16.90
.91
0.00
0.00
0.00
.4a
5.92
5.04
0.00
1.30
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.91
WATER-C02-FREE
(100.0)
70.64
0.00
16.97
.91
0.00
0.00
0.00
.48
5.94
5.06
0.00
SITl
AL
Ft 3
Ffc2MN
MGCA
NAK
PH*
H-C
S
0
ATOMS
WEIGHT
32.87
0.00
8.94
.64
0.00
0.00
0.00
.34
4.39
4.18
0.00
.02
0.00
0.00
0.00
49.53
ATOMS
NUMBERS (100.0)
24.20
0.00
6.85
.24
0.00
0.00
0.00
.18
3.95
2.21
0.00
62.37
0
C9OR
ABAN
NE
LC
ACMS
DlMO
HYOL
MT
H*lIL
TIRU
AP
CC
W(iO/MGO?FF'O
IN FE.MICS =
wtlGHT NORM
(100.0)
15.47
.80
29.99
50.42
2.40
0.00
0.00
0.00
0.00
0.00
o.oo0.00
0.00
0.00
.92
0.00
0.00
0.00
0.00
0.00
0.00
NON-OX 1DAT ION NORM
(FE2O3 CONVERTED TO FEO)
14.86
.80
30.04
50.51
2.40
0.00
0.00
0.00
0.00
0.00
0.00
1.36
0.00
0.00
0.00
0.00
0.00
0.00
0.00
o.oo
0.00
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
349
49.
3.
2.
44.
0.
0.
0.
71
3-COMPONENT
WT.PERCENTS
F 7.67
M 0.00
A 92.33
F 7.37C 3.09
A 88.74
N 51.75K 44.06
C 4.20
NO. 1048
REMARKS: See under 1035. No separate determination
of FeO; MgO trace.
MINERALOGY: Very fine grained. Groundmass: Very-
abundant Na-feldspar, scarce quartz, no femics, no
nepheline.
No. 1049
REMARKS: See under 1035. MnO, p2?5' SO3' C1
traces.
MINERALOGY: Filamented, very porous pumice.
Phenocrysts: Large zoned anorthoclase, with inclusions
of glass, apatite, magnetite, green pyroxene, cossyrite.
Groundmass: Glass (n 1.4958), no microlites.
OTHER INFORMATION: Other SiO2 determinations on
pumices: Alid, 67.45%; Deri, 72.50%.
No. 1050
REMARKS: See under 1035. MnO and P2?5 traceS-
MINERALOGY: Medium-grained (dyke?). Phenocrysts:
Micro-phenocrysts of Na-sanidine, riebeckite, scarce
aegirine. Groundmass: Alkali feldspar, quartz.
1049
ANORTHOCLASL PUMICL
14.52N 39.54E, ALID VOLCANO, ERITREA
E. MANASSE. 1909
SI02
TI02AL203
FE2O3FEO
MNU
MtiO
CAO
NA20
K20
P2O5
H20tH20-
C02
S03
TOTAL
ORIGINAL
ANALYS1S
71.08
0.0013.46
1.571.38
0.00
.31
.95
6.384.55
0.002.10
0.00
0.000.00
0.000.00
0.000.00
101.78
hATER-C02-FKEE(100.0)
71.310.00
13.501.58
1.380.00
.31
.95
6.404.56
0.00
SITI
ALFt3
Ft2MN
MGCA
NAK
PH*
H-C
S
ATOMSHEIGHT
33.210.00
7.121.10
1.070.00
.19
.68
4.733.7B
0.00
.02
0.000.00
0.00
ATOMSNUMBERS (100.0)
24.63
0
5
0
2
0
00
50
41
40
00
16
35
?9
01
00
0
Cfl
ORAB
ANNE
LC
ACNS
DIMO
HYOL
MTHM
IL
TIRU
APCC
WEIGHT NORM
(100.0)
17.880.00
27.0544.01
0.000.00
0.00
4.571.19
4.070.00
1.230.00
0.000.00
0.00
0.000.00
0.000.00
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
18.650.00
27.1344.14
0.000.00
0.00
0.002.40
4.150.00
3.530.00
0.000.00
0.00
0.000.00
0.000.00
MGO/MGO+fEO
IN FEMICS =
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
34038.0
13.4
4.9
43.7
.3?
.17
0.0
0.00
.36
83
3-COMPONENT
WT.PERCENTS
F 20.79
M 2.18
A 77.03
F 19.89
53.7038.30
8.00
1050
PAISANITt
14.45N 39.06E,
E. MANAS5L, 1909
AMBA TUKILAY, ERITREA
SI02
TI02
AL203
FE2O3
FEOMNO
MGU
CAJ
NA20
K2U
P2O5H20*
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
71.980.00
14.48
.88
.92
0.00
.28
.76
5.983.71
0.00.e5
0.00
0.000.00
0.000.00
u.oo
0.00
99.84
WATER-C02-FREE(100.0)
72.710.00
14.63
.89
.930.00
.28
.77
6.043.75
0.00
SITI
AL
FE3FE2
MN
MG
CA
NAK
PH*
H-C
s
ATOMS
..EIGHT
33.630.00
7.66
.62
.720.00
.17
.54
4.443.08
0.00
.01
0.000.00
0.00
ATOMSNUMBERS (100.0
24.91
0
5
0
4
1
0
00
91
23
27
00
14
?8
01
64
00
0ce
OR
ABAN
NELC
ACNS
DI
WOHY
OLMT
ILTI
RU
AP
CCMGO/MGC+^0
IN FEMICS =
WEIGHT NORM
(100.0)
21.010.00
22.21
51.251.65
0.000.00
0.000.00
1.82
0.00
.77
0.001.29
0.000.00
0.000.00
0.000.00
.49
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
20.100.00
22.25
51.341.65
0.000.00
0.000.00
1.88
0.002.78
0.000.00
0.000.00
0.00
o.oo
0.000.00
.23
c
ALK
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 15
NK
C
D.I.
57
35
7
86
.22
.50
.27
.54
1051
AMPHlBOLt FLLSO-jAclTE UELOFC TuFF)
14.52U 39.54E, ALID VOLCANO, ERITREA
F. MANASSE, 1909
SI02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H?0-
C02
S03
TOTAL
Qen
OR
AnAN
NE
LCAC
NS
DIWO
HY
OLMT
HM
II.TI
RU
AP
CC
MGO/MGOtFEO
IN FEKICS =
OKIGI.SAL
ANALYSIS
72.02
0.00
14.44
1.32
1.040.00
.41
? 9B
6.10
4.260.00
.35
0.00
0.00
0.00
0.000.00
0.00
0.00
100.92
WEIGHT MORM
(100.0)
18.050.00
25.10
50.240.00
0.00
0.00
1.07
0.00
4.02
0.00
.14
0.00
1.37
0.00
0.00
0.000.00
0.00
0.00
.54
WATEK-C02-FHEE(100.0)
71.61
0.00
14.36
1.31
1.030.00
.41
.97
6.07
4.240.00
NON-OXIDATIUN NORM
(FE2O3 CONVERTED TO FEO)
17.260.00
25.17
50.370.00
0.00
0.00
0.00
.28
4.19
0.00
2.73
0.00
0.00
0.00
0.00
0.000.00
o.oo
0.00
.26
SI
TI
AL
FE3
FE2MN
MG
CA
NA
KP
H*
H-
Cs
0
ATOMS
WEIGHT
33.65
0.00
7.64
.92
.81
0.00
.25
.70
4.53
3.540.00
.00
0.00
0.00
0.00
48.89
NIGGLI
SIAL
FM
CALK
K
MG
TI
P
C/FMQZ
ATOMSNUMBERS (100.0)
24.64
0.00
5.82
.34
.30
0.00.21
.36
4.05
1.860.00
62.42
348
41.1
12.0
5.1
41.8.31
.25
0.0
0.00.42
82
3-COMPONENT
WT.PERCENTS
F 17.97
NO. 1051
REMARKS: See under 1035. MnO, p2?5' S?3 traces-
MINERALOGY: Schlieren contain alkali feldspar and
brown amphibole. Phenocrysts: Micro-phenocrysts of
andesine-oligoclase. Groundmass: Micro-feldsitic,
with tridymite cavities; also, glass, magnetite, apatite,
fresh mica, brown amphibole rimmed with iron-oxide
and diopside.
OTHER INFORMATION: Other SiO2 determinations:
South rim of Alid caldera, hornblende felsodacite 71.60%,
hornblende hyalodacite 68.28%;
Hewchew, SW of Deggherto, hyalodacite 67.36%.
No. 1052
REMARKS: See under 1035. MgO trace.
MINERALOGY: Groundmass: Colourless glass (n 1.49);
spherulites with microlites of alkali feldspar and augite.
OTHER INFORMATION: Other SiO2 determinations on
obsidians: West flanks Alid, 71. 19%; Agoghito, SE of
Alid, 73.65%.
No. 1053
REMARKS: See under 1035. MnO trace.
MINERALOGY: Mariolitic cavities with tridymite
(n 1.474). Groundmass: Microfelsitic and spherulitic,
with schlieren; alkali feldspar; kataphorite, magnetite,
calcite.
1052
COMENDlTIC ObSlDlAN
14.51N 39.52E, NEAR BOYA,
E. MANASSEt 1909
ALID VOLCANO, ERITREA
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
72.46
0.00
13.96
1.65
.69
0.00
0.00
.Bl
5.69
5.16
0.00
.17
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.79
WATSR-C02-FREE
(100.0)
72.01
0.00
13.87
1.64
.88
0.00
0.00
.81
5.65
5.13
0.00
SITl
AL
FE3FE2
MNMG
CA
NAK
P
H +
H-C
S
ATOMS
WEIGHT
33.85
0.00
7.39
1.15
.69
0.00
0.00
.58
4.22
4.28
0.00
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.85
0.00
5.64
.43
.26
0.00
0.00
.30
3.79
2.26
0.00
0CB
OR
ABAN
NE
LC
AC
NSDI
WOHY
OL
MTHI
IL
TIRU
APCC
IN FEMCS =
WEIGHT NORM
(1OO.O)
18.91
0.00
30.39
42.77
o.oo0.00
0.00
4.59
0.00
2.97
.2b
0.00
0.00
.09
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
19.63
0.00
30.49
42.91
0.00
0.00
0.00
0.00
1.22
3.58
0.00
2.18
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
FMc
ALK
KMG
TI
10.0
4.4
44.3
.3
0.0
0.0
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
18.97
0.00
81.03
17.89
5.70
76.41
48.80
44.25
1053
PORPHYRITIc TKlHYMlTF COiFNiDlTE (wELDtD TUFF)
14.41N 40.0SE, cADDA AND SAVOITI, EMTREA
E. MAIiASSE. 1909
SI02
TIU2
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20+
H20-
C02
S03
TOTAL
OR Id (At.
ANALYSIS
72.8B
0.00
13.86
1.52
.73
0.00
.23
l.HZ
3.98
4.40
0.00
.52
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.94
wATER-C02-Fr(EE
73.31
0.00
13.94
1.53
.73
0.00
.23
1.83
4.00
4.43
0.00
(100.0)
SITl
ALFE3
FE2MN
MO.
CANA
K
P
H+
H-C
S
ATOMS
WEIGHT
34.05
0.00
7.33
1.06
.57
0.00
.14
1.30
2.95
3.65
0.00
.01
0.00
0.00
0.00
ATOMS
NUHBERS (100.0)
25.27
0.00
5.66
.40
.21
0.00
.12
.68
2.68
1.95
0.00
0CO
OR
A8AN
NELC
AC
NSDI
WOHY
OLMT
HMIL
TIRU
APCC
WtlGHT MORM
(100.0)
29.08
0.00
26.23
33.96
6.94
0.00
0.00
0.00
0.00
1.41
.16
0.00
0.00
2.22
0.00
0.00
o.oo0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
27.54
0.00
26.31
34.06
6.96
0.00
0.00
0.00
0.00
1.90
0.00
3.23
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
TIp
C/FM
oz
0
0
144
.0
.00
.93
3-COMPONENT
WT.PERCENTS
F 20.72
M 2.12
A 77.16
F 18.07
C 14.67
A 67.31
N 39.0?K 43.14
C 17.84
MG0/MG0*FEO
IN FEMICS =
1054
OUARTZ-bOSTOMITE DYKE
14.43M 39.25E, SENAFI, ERITREA
E. MANASSE? 1909
5102
TIU2
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
OHICI'IAL
ANALYSIS
73. 44
0.00
14.35
.50
0.00
0.00
.39
.S3
i>.74
3.?2o.no
.67
0.00
O.CO
0.00
0.00
0.00
0.00
0.00
99.44
k,ATER-C02-FKEE
(100.0)
74.35
0.00
14.53
.51
0.00
0.00
.39
.54
5.81
3.87
0.00
SITI
ALFE3
FL2MN
MG
CM
NAK
PH*
H-C
S
0
ATOMS
WEIGHT
34.31
0.00
7.59
.35
0.00
0.00
.24
.38
4.26
3.17
0.00
.01
0.00
0.00
0.00
49.14
ATOMS
NUMBERS (100.0)
25.31
0.00
5.83
.13
0.00
0.00
.20
.70
3. 84
1.68
0.00
62.81
0
ORAB
ANNE
LCAC
NSDI
WO
HY
OLMT
HM
IL
TI
RU
AP
cc
fttlGHT r-lOPM
(1CO.O)
23.96
0.00
22.92
49.31
2.06
0.00
0.00
0.00
0.00
? 4ft
0.00
.76
0.00
0.00
? ?1
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
23.64
0.00
22.95
49.36
2.06
0.00
0.00
0.00
0.00
.50
0.00
1.50
0.00
0.00
0.00
0.00
0.00
o.oo0.00
0.00
NIbGLI
SIAL
FMc
ALKK
MGTI
P
C/FM
oz
407
47.
5.
3.
44.
0.
0.
129
In FfcMCS - 1.00
3-COMPONENT
KT.PtRCENTS
F 4.7?
4.72
5.0090.27
56.8937.86
No. 1054
REMARKS: See under 1035. No separate determination
of FeO; P2O trace.
MINERALOGY: Phenocrysts: Albite, sanidine, quartz.
Groundmass: Quartz, albite, K-feldspar, magnetite,
kataphorite?.
No. 1055
REMARKS: See under 1035. MnO trace.
MINERALOGY: Phenocrysts: Na-feldspar. Groundmass:
Fluidal tecture; sanidine more abundant than quartz;
scarce magnetite, kataphorite(?).
No. 1056
REMARKS: See under 1035.
MINERALOGY: Black, compact, very fine-grained rock.
Phenocrysts: Extremely rare labradorite. Groundmass:
Fresh labradorite, with apatite inclusions; pale-green
augite, small rounded and altered olivines; common
magnetite, ilmenite; some devitrified glass.
1055
nuARTZ BOSTONITE DYKE
14.37N 39.25E, (JARAKIT,
E. MANASSt. 1909
SI02
TI02
AL2O3FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O +
H2O-
C02
SO3
TOTAL
ANALYSIS74.72
0.00
13.38
1.29
.77
0.00
.35
.18
4.27
3.94
0.00
1.4ft0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.36
WATER-C02-FREE
(100.0)
75.56
0.00
13.531.30
.78
0.00.35
.18
4.32
3.98
0.00
SI
TI
ALFE3
FE2
MM
M6CA
NA
K
PH+
H-C
S
ATOMS
WEIGHT
34.91
0.00
7.08
.90
.60
0.00
.21
.13
3.17
3.27
0.00
.02
0.00
0.00
0.00
ATOMSNUMBERS (100.0)
25. S6
0.00
5.46
.34
.22
0.00
.18
? 07
2.87
1.74
0.00
0
CB
OR
ASAN
NF.
LC
AC
NS
DI
k?0
HY
OL
MT
HM
IL
TIRU
APCC
IN FEMcS =
WEIGHT NORM(100.0)
33.96
1.76
23.61
36.63.91
0.00
0.00
0.00
0.00
0.00
0.00
1.24
0.00
1.90
0.00
0.00
0.000.00
0.000.00
.77
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
32.66
1.76
23.67
36.72.91
0.00
0.000.00
0.00
0.00
0.00
4.270.00
0.00
0.000.00
0.00
0.000.00
0.00
.26
SIAL
FM
C
ALK
K
MGTI
P
C/FM
QZ
442
46.7
12.7
1.1
39.5.38
.24
0.0
0.00.09
184
3-COMPONENTWT.PERCENTS
F 19.40
19.71
1.7278.56
50.89
46.96
1056
AuGITt-OLlVlNE BASALT
03.42M 42.3BE, CURETCA HILL,
E. MANASSt, 1917
SIU2
TI02
AL2O3
FE203
FEOMNO
MGO
CAO
NA20
K2U
P2O5
H20?H20-
C02
S03
TOTAL
ORIGIMAL
ANALYSIS
47.81
2.3
14.2'
4.2'
8.8
.4C
6.5<10.86
3.37.91
.22
1.080.00
0.00
0.00
0.000.00
0.00
0.00
101.0
k,ATER-C02-FREE(100.0)
47.88
2.39
14.25
4.24
8.81.49
6.56
10.87
3.37
.91
.22
SI
TI
AL
Ft3
FE2
MNMG
CA
NA
K
P
H?
H-C
s
ATOMSWEIGHT
22.36
1.43
7.53
2.97
6.85
.38
3.96
7.76
2.50.76
.10
.01
0.000.00
0.00
ATOMSNUMBERS (100.0)
17.74
6
1
2
3
4
2
67
22
18
74
15
63
32
42
43
07
0
CB
OR
ASAN
NE
LCAC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FLO
IN FEMICS =
WEIGHT NORM
(100.0)
0.000.00
5.39
24.7121.01
2.10
0.000.00
0.00
25.80
0.00
0.00
9.81
6.16
0.00
4.54
0.00
0.00
.48
0.00
.69
NON-OXIDATION NORM(FE203 CONVEKTED TO FEO)
0.000.00
5.44
19.9921.18
4.78
0.000.00
0.00
26.61
0.00
0.00
16.95
0.00
0.00
4.57
0.00
0.00
.49
0.00
.52
FMC
ALK
KMG
TIP
C/FM
QZ
46.526.1
8.6
.1!
.47
4.0
.21.56
-28
3-COMPONENT
WT.PERCENTS
F 54.63
M ?7.46
A 17.9?
F 46.29
C 38.5?
A 15.18
N 22.26
K 6.01
C 71.73
1057
TING;MITL
02.41H 42.21E,
F. MANASSL, 1917
DECOER PLAIN. 5 KM N.?. OF ALLENuO, SOMALI
SI02
TIU2
AL203
FE2O3
FEO
MNO
KGO
CAO
NA20
K2G
P2O5
H2U*
H2O-
CO2
SO3
CL
-0
TOTAL
ANALY5I
54.33
0.00
20.24
3.40
2.59
.23
.R7
1.65
8.10
5.19
0.00
4.03
0.00
0.00
0.00
? 41
0.00
0.00
-.09
100.95
WATER-C02-FKEE
(100.0)
56.24
0.00
20.95
3.52
2.6H
.24
.90
1.71
8.39
5.37
0.00
51Tl
ALFE3
FE2MN
HiCA
NAK
P
H +
H-
CS
ATOMS
WEIGHT
25.38
0.00
10.71
2.38
2.01
.18
.52
1.18
6.01
4.31
0.00
.05
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
19.86
0.00
8.72
.94
? 79
.07
.47
.65
5.74
2.42
o.oo
0
CBOR
AnAN
NELC
ACNS
DIMO
HYOL
MTHM
IL
Tl
RU
AP
CC
MGU/MGOtFEO
IlM FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
31.83
32.53
3.55
20.90
0.00
0.00
0.00
4.10
0.00
0.00
1.97
5.12
0.00
0.00
0.00
0.00
0.00
O.CO
.55
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
32.04
28.67
3.58
23.25
0.00
0.00
0.00
4.31
0.00
0.00
8.15
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.22
NIGOLl
SIAL
FM
CALK
KMG
TlP
C/FM
02
174
38.3
20.0
5.7
36.0
.30
.21
0.0
0.00
.28
-69
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
U.I.
79.73
4.32
65.96
28.62
7.88
63.50
54.22
34.74
11.04
87.32
No. 1057
REMARKS: See under 1035. TiO2 and P2O5 traces.
MINERALOGY: Holocrystalline, very fine-grained.
Phenocrysts: Sanidine, nepheline, rare pale-green
augite. Groundmass: Dominant sanidine; subordinate
fresh nepheline; rare sodalite (analysis suggests 5-6%
in mode); aegirine, in minute aggregates, is commoner
than cossyrite; accessory apatite.
OTHER INFORMATION: This rock-type forms numerous
small hills on the Degder plain.
No. 1058
MINERALOGY: Phenocrysts: Anorthoclase, quartz.
Groundmass: Fluidal texture; quartz, alkali feldspar,
glass, arfvedsonite-riebeckite, rare sodic pyroxene.
No. 1059
REMARKS: P2O5 trace.
MINERALOGY: Trachytic texture. Phenocrysts:
Abundant small anorthoclase; zoned aegirine-augite
(aegirine margins); rare sodalite?, arfvedsonite,
cossyrite. Groundmass: Alkali feldspar, arfvedsonite.
Fe-rich olivine, quartz, apatite.
OTHER INFORMATION: Pantellerite from Nomenta-ali
(see 1058) contains riebeckite-arfvedsonite and zircon.
1058
ARFVEDSDN1TE TRACHYTE
13.13N 42.05E. NO^ENTA-ALIi
M. DE ANGEL1S, 1923
GAHARRI, AFAR
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
65.58
.55
13.Bl
5.51
.38
.06
.14
.47
6.26
4.72
.06
.85
.90
0.00
0.00
0.00
0.00
0.00
0.00
99.29
WATER-C02-FNEE
(100.0)
67.23
.56
14.16
5.65
.39
.06
.14
.48
6.42
4.84
.06
SITl
AL
FE.3
FE2MN
MGCA
NAK
PH*
H-C
s
ATOMS
WEIGHT
30.64
.33
7.31
3.85
.30
.05
.08
.34
4.64
3.92
.03
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
23.52
.15
5.84
1.49
.11
.02
.07
.18
4.35
2.16
.02
0CB
ORAB
ANNE
LC
AC
N5
DIWO
HYOL
MT
HM
ILTI
RU
AP
CC
MGO/MGOtl-tO
IlM FEMICS =
WEIGHT N0r:M
(100.0)
12.55
0.00
28.67
45.84
0.00
0.00
0.00
7.58
0.00
.77
.35
0.00
0.00
0.00
3.05
.96
.10
0.00
.13
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
11.80
0.00
28.99
46.34
0.00
0.00
0.00
0.00
2.02
1.82
0.00
7.81
0.00
0.00
0.00
1.08
0.00
0.00
.14
0.00
.05
pC/FM
OZ 42
,11
,11
3-C0MP0NENT
WT.PERCENTS
F 34.63
M .82
A 64.55
F 33.97
54.67
41.22
4.10
1059
PANTELLtKITL13.2IW 42.02E, ID AMAflA,
M. DE ANGELIS, 1923
?w. OF BAHARASSOLI, ERITREA
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
(JKICINAi
ANALYSIS
69.41
.20
13.31
3.85
.92
? 09
.17
.74
6.13
4.53
0.00
.73
.36
0.00
0.00
0.00
0.00
0.00
0.00
100.44
wATER-C02-FkEE
69.86
.20
13.40
3.88
.93
.09
.17
.74
6.17
4.56
0.00
(100.0)
SITI
ALFE3
Ffc2
MNM&
CANA
KP
H*H-
Cs
ATOMS
WEIGHT
32.43
.12
7.04
2.69
.72
.07
.10
.53
4.55
3.76
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.30
.05
5.49
1.02^
.27
.03
.09
.28
4.16
2.02
0.00
0
CB
ORAn
ANNE
LC
AC
NSDI
MOHY
OLMT
HMIL
TIRU
APCC
MGU/MGO*FEO
IN FtMICS =
FLIGHT NORM
(100.0)
17.05
0.00
27.02
43.49
0.00
0.00
0.00
7.80
0.00
1.97
.56
0.00
0.00
1.73
0.00
.38
0.00
0.00
0.00
0.00
.50
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
17.14
0.00
27.22
43.81
0.00
0.00
0.00
0.00
2.08
3.30
0.00
6.06
0.00
0.00
0.00
.39
0.00
0.00
0.00
0.00
.07
3-COMPONENT
WT.PERCENTS
F 30.5H
M 1.09
A 68.33
F 29.50
C 4.58A 65.92
N 53.77
K 39.74
1060
COMENDlTE
13.28N 42.02E, ID
M. DE ANGLLIS. 19i3
S.w. OF [,AHARASSOLI . ERITREA
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
0
cnOR
AB
AN
NE
LC
AC
N5
DI
WO
HY
OL
MT
H'VI
IL
TI
RU
A I'
CC
ORIGINAL
ANALYSIS
78.S6
.20
11.47
.64
.04
.03
.18
? 19
3.62
4.58
0.00
.04
.02
0.00
0.00
O.CO
0.000.00
0.0099.57
wfclGHT I-IOKM
(100.0)
39.34
.19
27.28
30.87
.95
0.00
0.00
0.00
0.00
0.00
0.00
.45
0.00
0.00
.64
.15
0.00
.12
0.00
0.00
WATER-C02-FREE
(100.0)
78.95
.20
11.53
.64
.04
.03
.18
.19
3.64
4.60
0.00
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
39.04
.19
27.32
30.91
.95
0.000.00
0.00
0.000.00
0.00
1.210.00
0.000.00
.38
0.000.00
0.000.00
SI
TI
AL
FE3
FE2
MN
MS
CA
NA
K
P
H+
H-
C
s
0
ATOMS
WEIGHT
36.70.12
6.07.45
.03
.02
.11
.14
2.693.80
0.00
.00
.00
0.000.00
49.44
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
ATOMS
NUMBERS (100.0)
26.93.05
4.63.17
.01
.01
.09
? 072.41
2.000.00
63.63
552
47.5
5.7
1.4
45.3.45
.33
1.1
0.00.25
271
3-COMPONENT
wT.PERCENTS
F 7.51
M 1.99
A 90.51
F 7.50C 2.09
A 90.41
N 43.15
K 54.59
C 2.26
IN FtKICS - 1.00
No. 1060
MINERALOGY: Phenocrysts: Abundant corroded quartz,
anorthoclase?. Groundmass: Very fine-grained quartz
and alkali feldspar, sometimes as spherulites; rare
iron-oxide, brown amphibole.
OTHER INFORMATION: Comendite from Nomenta-ali
(see 1058) is similar to the above, plus containing some
rare aegirine.
No. 1061
REMARKS: CO? figure derived from "calcining. "
MINERALOGY: A slightly weathered rock. Phenocrysts:
Zoned andesine-labradorite, rare augite, analcime?.
Groundmass: Fluidal texture; oligoclase-andesine, green
pyroxene, hornblende (with rim reactions), apatite,
magnetite; nodules of brown basic material contain
chlorite-rimmed epidote, and augite and hornblende.
No. 1062
MINERALOGY: Phenocrysts: Zoned Anl5-20 (ca. 2 cm
long), augite and zoned aegirine-augite, rare brown
hornblende. Groundmass: Trachytic groundmass;
Trachytic groundmass; feldspar (orthoclase?), aegirine-
augite and associated analcime, apatite, magnetite.
Norm suggests analcime could be secondary after
nepheiine.
OTHER INFORMATION: Analysis (%) of the oligoclase
phenocrysts (contaminated with some analcime):
SiO2 61.79
A1-.O., 22.61
0.34
MgO 0.11 Total 99.99
Other specimens from Adaylo and Assacoma contained
large oligoclase-andesine and brown hornblende
phenocrysts.
Fe2?3
CaO
Na2?
K-,O
3.
9.
1.
12
65
15
1061
SODIC TRACHYANutSITE
14.32N 4O.53E, wALELl, A5SAco?iA. ERITREA
?. DE ANGELIS, 1925
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2U
P2O5
H2O +
H2O-
CO2SOi
OKlGlrJAl
ANALYSIS
56.55
? 67
17.7*
3.76
2.82
.19
.98
4.39
7.55
1.74
? 81
1.75
.20
.05
0.00
0.00
0.00
0.00
fcATfcR-C02-FI<EE(100.0)
58.18
.69
18.25
3.87
2.90
.20
1.01
4.52
7.77
1.79
.83
51TI
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
26.42
.40
9.39
2.63
2.19
.15
.59
3.14
5.60
1.44
.35
.02
.00
.01
0.00
ATOMS
NUMBERS (100.0)
20.50
7
1
1
5
18
58
03
86
06
53
71
31
81
25
0
c*OR
ABAN
NELC
ACNS
DIMO
HYOL
MTHM
ILTI
RU
APCC
MGO/MG0*FEU
IN FtMCS =
WEIGHT NOPM
(100.0)
0.00
0.00
10.60
62.12
9.56
2.02
0.00
0.00
0.00
6.21
0.00
0.00
.63
5.62
0.00
1.31
0.00
0.00
1.82
.12
.71
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
10.68
58.09
9.63
4.46
0.00
0.00
0.00
6.67
0.00
0.00
7.20
0.00
0.00
1.32
0.00
0.00
1.B4
.12
.24
TIP
C/FM
OZ
1.7
1.13
.69
-25
3-COMPONENT
WT.PERCENTS
F 39.05
M 5.87
A 55.13
32.48
21.67
45.85
55.19
12.72
32.09
1062
?DANCALlTt* (ANALCIME TRACHYTE)
14.32N 40.53E, ASSACOMA, ERITREA
M. DE ANGILIS. 1925
SIU2
TI02
AL203
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
TOTAl
ORIGINA|
ANALYSIS
57.94
.58
18.22
3.56
2.42
.19
.75
3.59
8.53
2.08
.25
1.86
.12
0.00
0.00
0.00
0.00
0.00
0.00
100.09
WATER-C02-FREE
(100.0)
59.06
.59
18.57
3.63
2.47
.19
.76
3.66
8.69
2.12
.25
SITI
ALFt3
Ft2
MN
M6
CANA
K
P
H+
H-C
s
ATOMS
WEIGHT
27.07
.35
9.64
2.49
1.88
.15
.45
2.57
6.33
1.73
.11
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0
20.72
7
1
5
16
68
96
73
06
40
38
92
95
08
0
CBOR
ASAN
NELC
AC
NSDI
MOHY
OL
MTHM
ILTI
RU
Ar>
CC
Ih FEMICS =
WEIGHT NORM
(1OO.OI
0.00
0.00
12.56
60.35
5.29
7.25
0.00
o.oo0.00
5.85
1.74
0.00
0.00
5.27
0.00
1.12
0.00
0.00
.56
0.00
.73
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.65
55.57
5.33
10.12
0.00
0.00
0.00
9.97
0.00
0.00
4.68
0.00
0.00
1.130.00
0.00
.56
0.00
.21
ALFM
CALK
KMG
TIP
C/FM
02
19235.
19.
12.
31.
1.
-36
3-COMPONENT
WT.PERCENTS
F 34.49
29.63
17.79
52.5?
60.07
14.65
25. 2R
1063
TRAcHYjjOLtRlTE
15.22N 44.lit,
D. ROMAN, 1926
NKARA lITIc i fc
SANA, vE-'EN
SIU2
TI02
AL203
FE203
FEQMNO
MGO
CAG
NA20
K20
P2U5
H2CH
H20-
C02S03
TOTAL
O?I&I,AL
ANALYSIS
41.P2
1.05
11.07
8.59
10.10
1.05
5.32
ltj.47
1.31
.84
.55
.76
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.93
V>ATER-C02-F*EE
(100.0)
41.75
1.05
11.05
8.58
10.08
1.05
5.31
18.44
1.31
.84
.55
SITI
ALFE3
FE2MN
M6
CANA
KP
Ht
H-c
s
0
ATOMS
WEIGHT
19.54
.63
5.86
6.01
7.85
.81
3.21
13.20
.97
.70
.24
.01
0.00
0.00
0.00
41.91
ATOMS
NUMBERS (100.0)
16
5
2
3
3
7
21
31
06
51
28
35
08
67
99
42
18
59.96
S102 L-EFIC11
0CP
ORAS
ANME
LC
ACMS
DIWO
HYOL
MTHM
ILTI
RU
AP
CC
MGO/M&Otf-EO
IN FtMCS =
-.05
k.tlGHT NORM
(100.0)
0.00
0.00
0.00
0.00
21.77
6.00
3.P9
0.00
0.00
50.53
2.21
0.00
0.00
12.45
0.00
1.99
0.00
0.00
1.20
0.00
.60
-5.14
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
22.14
6.10
3.96
0.00
0.00
57.66
0.00
0.00
12.13
0.00
0.00
2.02
0.00
0.00
1.22
0.00
.36
NIGGLI
SIAL
FMC
ALKK
MGTI
PC/FM
QZ
80
12.
45.
38.
3.
1.
-34
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
71.44
70.34
8.22
47.55
46.99
5.47
fc.35
4.07
R9.57
No. 1063
REMARKS: MnO values in the analyses of Roman (1926)
are distinctly too high; the value of these analyses is
further reduced by the evident transposition of some of
the mineralogical descriptions from their related analyses
(eg. see 10761). H?O+ values refer to loss on heating.
MINERALOGY: Phenocrysts: Serpentinised zoned augite-
diopside. Groundmass: An45-55, pyroxene, magnetite,
apatite.
OTHER INFORMATION: Specific gravity 3. 158.
No. 1064
REMARKS: See under 1063.
MINERALOGY: Refers to a rock other than the analysed
specimen? Groundmass: Trachytic texture. An20-25,
quartz, chlorite, calcite, often as spherulites.
No. 1065
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: An60-70, diallage-diopside.
Groundmass: Plagioclase, pyroxene, magnetite, ortho-
clase; veins of chlorite, quartz, calcite.
OTHER INFORMATION: Specific gravity 2.893.
1064
TRACHYANDESITE QMU&EARITE"
14.56N 43.32E. HAJELA.J. SAFASSATI
D. ROMAN. 1926
SI02
TI02
AL2O3
FE203
FEO
MNO
MGU
CAO
NA20
K2O
P2O5
H2O+
H2O-
C02
SO3
TOTAL
ORIGINAL
ANALYSIS
46.59
0.00
9.54
16. 82
7.59
.89
4.87
7.05
4.27
.60
0.00
1.80
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.02
k?ATER-C02-FKEE
(100.0)
47.43
0.00
9.71
17.12
7.73
.91
4.96
7.18
4.35
.61
0.00
SITl
ALFE3
FE2MN
MSCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
21.77
0.00
5.05
11.76
5.90
.69
2.94
5.04
3.17
.50
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.12
0.00
4.37
4.93
2.47
.29
2.83
2.94
3.22
.30
0.00
0
CBOR
AHAN
NELC
ACNS
DIwo
HY
OLMT
HMIL
TIRU
AO
CC
MGO/MGCH-FEO
IN FEMCS =
HEIGHT NORM
(100.0)
2. t-Bo.oo
3.62
36.84
5.14
0.00
0.00
0.00
0.00
24.10o.oo
2.75
0.00
24. C7
0.00
0.00
0.00
0.00
0.00
0.00
.90
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.74
25.55
5.31
6.79
0.00
o.oo0.00
27.14
0.00
o.oo31.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.28
SIAL
FMC
ALK
KMG
TI
P
104
12.5
60.4
16.9
10.1
.08
.27
0.0
0.00
3-COMPONENT
WT.PERCtNTS
F 71
M 14
A 14
F 67
C 19
A 13
.48
.26
.26
.19
.41
.40
1065
TRACHYDOLLRITL
15.22N 44.HE,
D. RtViAN. 1926
SANA. YE/EN
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
AHALYSI5
47.84
.12
13.08
8.04
6.96
1.12
3.41
10.08
4.23
2.55
1.35
.87
0.00
0.00
0.00
0.00
0.00
U.OO
0.00
99.65
V.ATER-C02-FREE
(100.0)
48.43
.12
13.24
8.14
7.05
1.13
3.45
10.20
4.28
2.58
1.37
51Tl
ALFE3
FE2MN
M3CA
NAK
PH*
H-C
S
ATOMS
WEIGHT
22.35
.07
6.92
5.62
5.41
.87
2.06
7.20
3.14
2.12
.59
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.11
.03
5.84
2.29
2.21
.36
1.93
4.09
3.11
1.23
.43
0cn
OR
ABAN
NELC
ACNS
DI
woHY
OLMT
HMIL
TIRU
APCC
MGO/MGO+FEO
IN FfcMICS =
fctlGHT NORM
(100.0)
0.00
0.00
15.28
23.76
9.22
6.79
0.00
U.OO
0.00
27.63
0.00
0.00
2.28
11.82
0.00
.23
0.00
0.00
2.99
0.00
.58
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
15.53
14.61
9.37
12.06
0.00
0.00
0.00
29.16
0.00
0.00
16.00
0.00
0.00
.23
0.00
0.00
3.03
0.00
.30
L
ALKK
MGTl
P
C/FM
OZ
13.6
#2
.2
.2
1.3
.6
-41
3-COMPONENT
WT.PERCENTS
F 59.55
M 13.54
A 26.92
F 47.08C 31.64
A 21.28
N 25.09K 15.12
C 59.79
1066
TRACHYDOLtRlTE
14.55N 43.29E,
P. ROMAN. 192b
SI02
TI02
AL203
FE2O3FEO
MNOMGO
CAO
NA2O
K?O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
0C9
ORAF?
AH
NELC
ACNS
DI
WO
HY
OL
MT
H>"
ILTI
RU
AP
ccMCjO/MGO-fFiO
l.'i FENiICS =
ORIGINAL
ANALYSIS
48.00
0.00
16.48
10.15
2.40
3.22
2.55
11.42
4.20
1.13
0.00
1.19
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.74
WEIGHT NORM
(100.0)
0.00
0.00
6.72
29.6B
22.82
3.29
0.00
0.00
0.00
17.59
5.10
0.00
0.00
14.A1
0.00
U.00
0.00
0.00
0.00
0.00
.81
WATER-C02-FKEE
(100.0)
48.22
0.00
16.55
10.20
2.41
3.23
2.56
11.47
4.22
1.14
0.00
NON-OXIOAT ION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
6.85
15.36
23.27
11.43
0.00
0.00
0.00
30.11
0.00
0.00
12.97
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.25
SITI
ALFE3
FE2MN
MbCA
NAK
PH?
H-C
s
0
ATOMS
WEIGHT
22.43
0.00
8.72
7.10
1.87
2.49
1.54
8.16
3.12
.94
0.00
.01
0.00
0.00
o.oo
44.37
NIGGLI
SIAL
FMC
ALK
KMG
TIP
C/FM
QZ
ATOMS
NUMBERS (100.0)
17.92
0.00
7.25
2.8A
.75
1.02
1.42
4.57
3.04
.54
0.00
60.62
112
22.6
37.7
28.5
11.2
.15
? 23
0.0
0.00
.76
-33
3-COMPONENT
WT.PERCENTS
F 61.43
M 12.48
A 26.09
F 42.83C 38.98
A 18.14
No. 1066
REMARKS: See under 1063. MnO ridiculously high.
MINERALOGY: Phenocrysts: An60, "isometric sanidine"
(nepheline?). Groundmass: An40, Mg-rich diopside,
chlorite, "sanidine. "
No. 1067
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: An60-70. Groundmass:
An50-55; augite, partly "altered" to green hornblende;
chlorite, magnetite.
No. 1068
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: An36. Groundmass: An20;
magnetite; rare quartz, calcite, white mica.
OTHER INFORMATION: Specific gravity 2. 672.
1067
TRACHyANuFSITfc
15.02N 43.35E,
0. ROHAN. 1926
WASAL. YEKEN
SI02
T102
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20+
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
49.38
.17
17.05
b.lfi
6.15
1.30
1.92
13.80
.97
1.42
.96
? 36
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.66
WATER-C02-FREE
(100.0)
48.75
.17
16.83
8.08
6.07
1.28
1.90
13.62
.96
1.40
.95
SITI
ALFt3
FE2MN
MGCA
NAK
P
H*H-
CS
ATOMS
WEIGHT
23.07
.10
9.02
5.72
4.78
1.01
1.16
9.86
.72
1.18
.42
.00
0.00
0.00
0.00
ATOMSNUMBERS (100.0)
18.25
.05
7.43
2.28
1.90
.41
1.06
5.47
.70
.67
.30
0CB
OR
AnAN
NELC
ACNS
01WO
HYOL
MT
HIIL
TIRU
AP
CC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
10.37
0.00
B.30
8.12
37.46
0.00
0.00
0.00
0.00
20.65
0.00
.99
0.00
11.73
0.00
.32
0.00
0.00
2.07
0.00
.48
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
1.880.00
8.43
8.2438.05
0.000.00
0.000.00
21.79
0.00
19.18
0.00
0.00
0.00
.32
0.00
0.00
2.10
0.00
.20
SIAL
FMC
ALKK
MGTI
P
C/FM
02
117
23.9
36.4
35.3
4.4
.<,
.1
.3
.9
.9
-0
3-COMPONENT
WT.PERCENTS
F 76.88
M 10,30
A 12.82
F 46.95
C 45.22
A 7.83
8.77
85.74
1068
TRACHYANOESITE
15.03N 43.43E,
D. ROMAN, 1926
MANAKA, YEMEN
S102
TI02
AL2O3
FE203
FEOMNO
MGO
CAO
NA20
K20
P205
H20*
H2U-
C02S03
TOTAL
ORIGINAL
ANALYSIS
55.95
0.00
13.52
12.20
.85
1.64
.71
6.17
2.79
4.23
1.13
.61
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.80
V.ATER-C02-FREE
(100.0)
56.41
0.00
13.63
12.30
.86
1.65
.72
6.22
2.81
4.26
1.14
SI
TIAL
F?3
F?2MN
MGCA
NAK
P
H*H-
Cs
ATOMS
WEIGHT
26.14
0.00
7.15
8.53
.66
1.27
.43
4.41
2.07
3.51
.49
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.72
0.00
5.90
3.41
.26
.52
.39
2,45
2.00
2.00
.35
Q
C8
ORAB
ANNE
LC
ACNS
DIWO
HYOL
MT
H4
ILTI
R'JAP
CC
MGG/MGO+FLO
III FtMICS =
WHISHT NORM
(100.0)
14.71
0.00
25.26
23.85
11.91
0.00
U.00
0.00
0.00
3.85
3.07
0.00
0.00
8.18
6.AB
0.00
0,00
0,00
2.49
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
4.34
0.00
25.86
24.42
12.20
0.00
0.00
0.00
0.00
11.10
0.00
19.52
0.00
0.00
0.00
0.00
0.00
0.00
2.55
0.00
.09
FMC
ALK
K
3820
16
.2.5
.7
? bO
3-COMPONENT
WT.PERCENTS
F 62.80
49.73
73.51
26.75
21.15
32.07
46.7R
1069
ALBITL-UUARTZ bOSTONITi
14.561-t 43.32E, HAJEUA,
D. ROMAN. 1926
CHUT8A, YEMEN
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SOi
TOTAL
ANALYSIS
56.90
0.00
13.28
10.17
2.51
.98
.61
6.65
4.46
3.05
.12
? 71
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.44
*ATER-C02-FKEE
(100.0)
57.63
0.00
13.45
10.30
2.54
.99
.62
6.74
4.52
3.09
.12
51TI
ALFE3
Ft2MN
MGCA
NAK
P
H*H-
Cs
ATOMS
WEIGHT
26.58
0.00
7.03
7.11
1.95
.76
.37
4.75
3.31
2.53
.05
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
21.05
0.00
5.79
2. 84
.78
.31
.34
2.64
3.20
1.44
.04
0
C3
ORAH
ANKE
LCAC
NS01
woHY
OL
MT
H"A
ILTI
RUAP
CC
MGO/MGOtFEO
IN FLMICS =
WEIGHT NORM
(100.0)
9.82
0.00
1H.30
38.30
7.24
0.00
0.00
0.00
0.00
3.33
H.flfl
0.00
0.00
11.46
2.42
0.00
0.00
0.00
.27
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTER TO FEO)
0.00
0.00
18.66
39.07
7.38
0.00
0.00
0.00
0.00
22.98
0.00
11.14
.500.00
0.00
0.00
0.00
0.00
.27
0.00
.08
NIGGLI
SIAL
FMC
AL<K
MGTI
P
C/FM
QZ
173
23.9
35.2
21.8
19.2
.3
.0
0.0
.1
.6
-3
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
N
K
C
60.96
2.93
36.11
47.24
?4.7R
27.9H
31.50
21.54
46.96
No. 1069
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: An5-7 (3 mm length) with
inclusions of magnetite, apatite, mica. Groundmass:
Microlites of orthoclase (albite rims), green biotite,
magnetite, apatite, quartz.
OTHER INFORMATION: Specific gravity 2. 657. Sheet
intrusion.
No. 1070
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: Zoned An50-70. Ground-
mass: Anl5 in trachytic texture; geodes containing
chlorite, calcite, chalcedony.
No. 1071
REMARKS: See under 1063.
MINERALOGY: Groundmass: Trachytic texture;
orthoclase with albitic rims; quartz, green biotite,
ilmenite, magnetite.
OTHER INFORMATION: Specific gravity 2. 740. Sheet
intrusion.
1070
TRACHYANDESITt
15.03N 43.43E,
D. ROMAN. 1926
MANAKA, YEMEN
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
57.080.00
12.659.21
.30
1.043.76
5.495.92
3.46
.07
1.030.00
0.00
0.000.00
0.00
o.oo
0.00100.01
WATER-C02-FREE(100.0)
57.670.00
12.78
9.30.30
1.05
3.805.55
5.983.50
.07
SITl
AL
FE3FE2
MM
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
26.670.00
6.69
6.44
.23
.81
2.273.92
4.392.87
.03
.01
0.000.00
0.00
ATOMSNUMBERS (100.0)
20.730.00
5.41
2.52
.09
.32
2.042.14
4.171.60
.02
0
CBOR
AfiAN
NE
LCAC
N5
DIMO
HYOL
MT
HW
ILTI
RU
APcc
MGO/MGO-fFEO
IN FtMCS =
WEIGHT NORM
(100.0)
0.000.00
20.70
43.640.00
1.40
0.003.95
0.00
20.46
.37
0.000.00
4.424.91
0.000.00
0.00
.150.00
1.00
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
0.000.00
21.08
39.350.00
4.18
0.000.00
1.06
23.310.00
0.0010.87
0.000.00
0.000.00
0.00
.160.00
.43
c
ALK
3-COMPONENT
WT.PERCENTS
F 41.99
M 16.60
A 41.41
F 39.01
C 22.52A 38.47
N 39.81K 23.27
C 36.9?
1071OUARTZ BOSTONITt
14.54N 43.27E,0. ROMAN, 1926 tL BIHAR, UirAL. YEMEN
SI02
TI02
AL2O3
FE203
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
59.98
.09
14.429.94
2.47
.82
.59
1.114.13
5.72
.80
.69
0.000.00
0.000.00
0.00
0.000.00
100.76
V.ATER-C02-FREE
(100.0)
59.94
.09
14.419.93
2.47
.82
.59
1.11
4.135.72
.80
51
TIAL
FL3FE2
MNMii
CA
NAK
PH*
H-C
s
ATOMS
WEIGHT
28.02
.05
7.63
6.95
1.92
? 6 4
.36
.79
3.06
4.75
.35
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0
21.69
6
2
2
2
02
.15
71
75
25
32
43
90
64
24
0
CB
ORArs
ANNE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RU
APCC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
12.651.11
33.86
35.00
.61
0.00
0.000.00
0.000.00
0.001.47
0.0010.39
2.79
.17
0.000.00
1.750.00
1.00
NON-OXIDATION NORM(FE2O3 CONVEKTED TO FEO)
3.281.13
34.52
35.68
.820.00
0.000.00
0.000.00
0.0022.62
0.000.00
0.00
.17
0.000.00
1.7B0.00
.09
3-COMPONENTWT.PERCENTS
54.31
53.104.75
42,15
37,6H52.19
10.13
1072
ALBIT1C B0STOMTE
15.02fl 43.3bE. ?|ASAL?
D. ROMANt 1926
5IU2
TI02
AL2O3
FF203
FED
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
64.50
0.00
15.08
5.64
.41
.80
.61
2.25
7.27
3.04
.65
.32
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.77
WATER-C02-FREE
64.21
0.00
15.01
5.61
.41
.80
.61
2.24
7.24
3.03
.85
(100.0)
SITl
AL
Ft3FE2
MNM&
CANA
KP
H*H-
C5
0
ATOMS
WEIGHT
30.13
0.00
7.98
3.94
.32
.62
.37
1.61
5.39
2.52
.37
.00
0.00
0.00
0.00
47.51
ATOMS
NUMBERS (100.0)
22.4H
0.00
6.19
1.48
.12
.24
.32
.84
4.91
1.35
.25
61.82
WEIGHT NOPM
b
0
17
60
(100.0)
.34
.00
.93
.35
NSDI
WO
HY
OL
MT
H'1
ILTI
RU
AP
CC
MGO/MGO*hcO
In FtMCS -
0.00
3.27
? B2
0.00
0.00
3.93
2.61
0.00
0.00
0.00
1.M5
0.00
l.on
NON-OXIDATION NORM
(FE203 CONvEHTED TO FEO)
3.91
o.oo
IB.12
61.00
0.00
0.00
0.00
o.oo
.24
5.44
o.oo
9.41
0.00
o.oo
0.00
0.00
0.00
o.oo
1.87
0.00
c
ALK
3-COMPONENT
hT.pERCENTS
F 35.65
M 3.59
A 60.75
32.51
12.09
55.40
57.88
24.20
17.91
No. 1072
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: An5. Groundmass:
Fluidal, trachytic texture; anorthoclase?; some magnetite,
apatite, white mica, rare quartz.
OTHER INFORMATION: Specific gravity 2. 531.
No. 1073
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: Anorthoclase rhombs with
inclusions of magnetite and muscovite. Groundmass:
Saccharoidal quartz and feldspar, some AnlO.
OTHER INFORMATION: Specific gravity 2. 538. Sheet
intrusion in comendite lavas.
No. 1074
REMARKS: See under 1063.
MINERALOGY: Groundmass: Devitrified to microfelsite
with some quartz.
1073
LARvUITE npANTELLERITE"
14.56U 43.32E. j. EL
D. ROMAN. 1926
EID. HAjELA, YEMEN
SI02
TI02
AL203
FEZ03
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYS15
70.08
.10
9.5R
7.22
.28
1.32
.48
1.26
6.15
2.24
.73
.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99. 84
WATER-C02-FHEE
(100.0)
70.47
.10
9.63
7.26
.28
1.33
.48
1.27
6.18
2.25
.73
SITl
ALFE3
FE2MN
M&
CANA
K
PH?
H-C
5
ATOMS
WEIGHT
32.74
.06
5.07
5.05
.22
1.02
.29
.90
4.56
1.86
.32
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.70
.03
3.9B
1.92
.08
.39
.25
.48
4.21
1.01
.22
0
CBOR
AHAN
NFLC
AC
NSDI
WOHY
OLMT
HMIL
TIRU
APCC
MG0/M6O+FE0
IN FEMICS =
HEIGHT NORM
(100.0)
27.78
0.00
13.35
36.99
0.00
0.00
0.00
13.62
0.00
1.61
0.00
1.12
0.00
3.73
0.00
.19
0.00
0.00
1.61
0.00
.69
NON-OX I DAT I UN NORM
(FE2O3 CONVERTED TO FEO)
27.58
0.00
13.53
37.52
0.00
0.00
0.00
0.00
3.65
1.77
0.00
14.13
0.00
0.00
0.00
.19
0.00
0.00
1.63
0.00
.10
SIAL
FMC
ALK
319
25
34
6
33
C/FM
OZ
3-C0MP0NENT
WT.PERCENTS
F 45.82
43.73
7.35
48.92
63.73
23.21
13.06
1074
TRACHYTE UCOMENDITE-
15.23N 44.10E, SANA,
D. ROMAN. 1926
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
71.69
0.00
10.75
4.44
.44
.66
? 53
2.57
4.46
4.19
0.00
.88
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.81
WATER-C02-FREE
(100.0)
71.74
0.00
10.76
4.44
.44
.86
.53
2.57
4.46
4.19
0.00
SITI
AL
FE3FE2
MN
MG
CA
NAK
PH?
H-C
s
ATOMS
HEIGHT
33.49
0.00
5.69
3.11
.34
.67
.32
1.84
3.31
3.48
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.10
0.00
4.44
1.17
.13
.26
.78
.96
3.03
1.87
0.00
0
CROH
ASAN
NELC
AC
NSDI
WO
HYOL
MT
HM
ILTI
RU
AP
CC
MGO/MGO-^ bO
IN FtKICb =
HEIGHT NOPM
(100.0)
27.26
0.00
24.84
31.95
0.00
0.00
0.00
5.21
0.00
3.27
3.61
0.00
0.00
3.P5
0.00
0.00
0.00
0.00
0.00
0.00
.89
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
25.50
0.00
25.06
32.22
0.00
0.00
0.00
0.00
1.39
11.27
0.00
4.57
0.00
0.00
0.00
0.00
0.00
o.oo0.00
0.00
.16
SIAL
FM
CALK
KMG
TIP
C/FM
QZ
335
29.7
24.5
12.9
32.il
.38
.15
0.0
0.00
.53
114
3-COMPONENT
WT.PERCENTS
F 34.71
M 3.77
A 61.52
F 30.31C 15.96
A 53.73
N 39.75K 37.34
C 22.91
1075
CCMFNblTE
14.56N 43.32E,
0. ROMAN, 1926
?ADI HAJELA,
5102
TIU2
AL203
FE2O3
FEO
MNC
MGO
CAO
NA20
K2U
P205
H20 +
H20-
C02
S03
GRItl.-.AL
ANALYSIS
73.07
.16
9.34
6.98
.37
.43
1.34
2.04
2.04
3.12
1.07
1.08
0.00
0.00
0.00
0.00
HATER-C02-FKEE
(100.0)
73
9
6
1
2
2
3
1
10
16
34
98
37
43
34
04
04
12
07
51Tl
ALFE3
FE2MN
MGCA
NAK
PH+
H-C
s
ATOMS
WEIGHT
34.14
.10
4.94
4.88
.29
.33
.81
1.46
1.51
2.59
.47
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.61
31
1
1
04
86
84
11
13
70
77
39
40
32
0
C3
ORAB
ANNE
LCAC
NS
DIWO
HYOL
MT
HM
ILTI
RUAP
CC
M60/W00+FEG
IN FEMICS =
HEIGHT NORM
(100.0)
45.50
1.19
IS.50
17.31
3.85
0.00
0.00
0.00
0.00
0.00
0.00
3.35
0.00
2.14
5.52
.30
0.00
0.00
2.34
0.00
l.on
NON-OXIDATION NORM
(FE2O3 CONvEKTED TO FEO)
40.75
1.20
18.75
17.55
3.90
0.00
0.00
0.00
0.00
0.00
0.00
15.18
0.00
0.00
0.00
.31
0.00
0.00
2.37
0.00
.27
NIGGLI
51AL
FMC
ALK
KMG
TIP
C/FM
OZ
372
28.1
40.5
11.2
20.3
.50.25
.6
2.31
.28
191
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
KC
D.I.
53.07
9.68
37.26
50.5?
14.07
35.46
28.33
43.33
28.33
84.58
No. 1075
REMARKS: See under 1063. This rock may be the host
to 1073.
MINERALOGY: Phenocrysts: Corroded quartz with
apatite inclusions, microperthitic orthoclase, An5.
Groundmass: Microfelsitic, rare iron-oxide.
OTHER INFORMATION: Specific gravity 2.585.
No. 1076
REMARKS: See under 1063.
MINERALOGY: Evidently transposed from another
specimen. Phenocrysts: An70-55. Groundmass:
Corroded K-feldspar crystals, quartz, chlorite,
magnetite, calcite, epidote.
OTHER INFORMATION: Specific gravity 2. 500.
No. 1077
REMARKS: See under 1063.
MINERALOGY: Phenocrysts: Anorthoclase (sericitised).
Groundmass: Devitrified, felsitic; some femics, no
quartz?.
OTHER INFORMATION: Specific gravity 2. 570.
1076
TRACHYDOLE.KITE acOMENDITE"
14.55N 43.30E, j. DAMER,
D. ROMAN, 1926
HAjELA, YEMEN
SIU2
TIO2
AL203
FE2O3
FEO
MNO
M6U
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
75.19
0.00
9.42
5.67
.22
.40
.39
.60
3.83
3.14
.27
.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.41
WATER-C02-FREE
(100.0)
75.85
0.00
9.50
5.72
.22
.40
.39
.61
3.86
3.17
.27
SI
TI
AL
F?3
FE2
MN
MS
CA
NA
K
P
H*
H-
Cs
ATOMS
WEIGHT
35.13
0.00
4.98
3.97
.17
.31
.24
.43
2.84
2.61
.12
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.32
0.00
3.89
l.SO
.06
.12
.20
.23
2.60
1.40
.08
0
CB
OR
API
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HW
IL
TI
RU
AP
CC
MGO/MGO?KEG
IN FLMICS =
WLIGHT NOPM
(100.0)
40.58
0.00
18.77
31.22
0.00
0.00
0.00
1.37
0.00
1.10
0.00
.47
0.00
2.04
3.86
0.00
0.00
0.00
.60
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
37.10
0.00
18.98
31.57
0.00
0.00
0.00
0.00
.37
1.25
0.00
10.13
0.00
0.00
0.00
0.00
0.00
0.00
.60
0.00
.12
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 44.45
50.59
41.48
7.93
1077
HYALOTRACHYTE n
15.03N 43.43E,
D. ROMAN, 1926
b-ALKALllvjE RHYOLlTE*
ATTARA.MANAKA, YEMtN
SI02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAU
NA2O
K2U
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ANALYSIS
77.12
.08
12.72
6.42
.89
1.02
.17
.93
.63
1.11
.09
.22
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.40
WATER-C02-FREE
(100.0)
76.22
.08
12.57
6.35
.88
1.01
.17
.92
.62
1.10
.09
SI
TI
AL
Ft3
Ft2
MN
Mb
CA
NA
K
P
ATOMS
WEIGHT
36.03
.05
6.73
4.49
.69
.79
.10
.66
.47
? 92
.04
ATOMS
NUMBERS (100.0)
26.47
.02
5.15
1.66
.26
.30
.09
.34
.42
.49
.03
0.00
0.00
0.00
0
csOR
AS
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FEO
I rt S =
WEIGHT NORM
(100.0)
66.33
8.88
6.50
5.28
4.05
0.00
0.00
0.00
0.00
0.00
0.00
.42
0.00
5.91
2.28
.15
0.00
0.00
.19
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
61.23
8.99
6.58
5.35
4.10
0.00
0.00
0.00
0.00
0.00
0.00
13.41
0.00
0.00
0.00
.15
0.00
0.00
.20
0.00
.04
3-COMPONENT
WT.PERCENTS
F 79.28
M 1.84
A 18.87
F 73.25
23.60
41.57
34.83
1078
PANTELLtklTt
14.55H 43.35E.
0. ROMAN, 1926
?.ADI kADIA, YEMEN
SIU2
TIU2
AL203
FE2O3
FED
MNO
MdO
CAU
NA20
K 2U
P2U5
H2U*
H20-
C02
S03
TOTAL
ORI&IMrtl
ANALYSIS
79.37
0.00
6.27
4.14
.60
.58
.40
2.57
3.02
3.65
O.CO
1.P9
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.69
WATER-C02-FREE
(100.0)
78
0
6
4
2
3
3
0
90
00
23
12
60
58
40
55
00
63
00
SiTI
AL
FE.3
FL2MN
MGCk
NAK
P
H +
H-c
s
0
ATOMS
taEI&HT
37.08
0.00
3.32
2.90
.47
.45
.2*
1.84
2.24
3.03
0.00
.01
0.00
0.00
0.00
50.12
ATOMS
NUMBERS (100.0)
27.45
0.00
2.56
1.08
.17
.17
? ?1
.95
2.03
1.61
0.00
63.77
WLl&HT HC?M
(100.0)
46.24
0.00
21.50
11.8?
0.00
0.00
0.00
11. ?4
.02
6.23
2.24
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NON-OxIDATIUIl NORM
(FE2O3 CONvEhTED TO FEO)
48.49
0.00
21.67
11.91
0.00
0.00
0.00
0.00
3.20
11.23
0.00
3.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
uz
482
22.5
28.7
16.8
32.0
.44
.13
0.0
0.00
.59
283
3-COMPONENT
WT.PERCENTS
F 40.14
32.6H39.50
27.81
No. 1078
REMARKS: See under 1063. Sub-aluminous.
MINERALOGY: Groundmass: Brown glass; microlites
quartz, An5-8, cossyrite(?).
No. 1079
MINERALOGY: Groundmass: Labradorite, titanaugite,
uncommon olivine, magnetite, some glass.
OTHER INFORMATION: Specific gravity 2.97.
No. 1080
MINERALOGY: Groundmass: Brown glass, An60, fresh
Fe-rich olivine; no augite.
OTHER INFORMATION: Specific gravity 2. 95.
1079
AlJGlTt-OLWINt tlASALT
03.50M 45.25E, SHFIK
P. AL0IS1, 1927
..Uf-E. eULO BLIKTI. SOMALI
SI02
TIU2
AL2O3
FE203
FEO
MMO
MGO
CAO
NA20
K20
P2O5
H2U+
H2U-
C02
S03
TOTAL
OKIC.INAi
ANALYSIS
46.64
3.P2
13.23
4.60
10.51
.19
5.96
10.17
2.58
.59
.47
1.30
.32
0.00
0.00
0.00
0.00
0.00
0.00
100.58
WATER-C02-FKLE
(100.0)
10.62
.19
6.02
10.28
2.61
.60
.47
SI
TI
AL
Ft3
FL2
MN
Mi,
CA
NA
K
P
H*
H-
cs
ATOMS
WEIGHT
21.79
2.29
7.00
3.36
8.17
.15
3.60
7.27
1.91
.49
.21
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.65
1.09
5.90
1.37
3.33
.06
3.37
4.12
1.89
.29
.15
WEIGHT NORI*
(100.0)
? K6
0.00
3.53
22.10
22.9R
0.00
0.00
0.00
0.00
20.f.4
0.00
14.47
0.00
7.05
0.00
7.32
0.00
0.00
1.04
0.00
NON-OXIDATION NORM
(FE2O3 CONvFKTED TO FEO)
0.00
0.00
3.56
22.31
23.20
0.00
0.00
0.00
0.00
21.37
0.00
8.75
12.37
0.00
o.oo7.39
0.00
0.00
1.05
0.00
3-COMPONENT
WT.PERCENTS
F 62.64
M 74.39
A 17.97
F 53.44
C 35.50
A 11.06
1080
OLIVINE BASALT
03.50N 42.25E,
P. ALOISI, 1927
SHEIK i,W!t. LULU BUHTI. SOMALI
SI02
TI02
AL2O3
FE2O3
FFO
MNO
MGU
CAU
NA20
K2U
P2U5
H20-
C02
S03
TOTAL
OKIGINA
AMALYS1
47.
3.
13.
4.
9.
;,.
9.
2.
.
?
*
,2
.8
.0
55n
B
)7
<4
79
.0
*7
37
0.00
0.00
0.00
0.00
0.00
0.00
100.13
k,ATER-C02-FKEE
(100.0)
13.56
5.02
9.90
SI
TI
AL
FL3
Ft2
MN
MG
CA
NA
ATOMSHEIGHT
22.15
2.09
7.09
3.4b
7.59
.14
3.60
7.03
2.07
ATOMS
NUMBERS (100.0)
17.90
.99
5.96
1.41
3.09
.06
3.36
3.98
2.04
0.00
0.00
0
en
OR
AF)
AN
NF
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
WGU/MGO+FL'O
I .FE.MICS =:
HEI&HT NOrM
(100.0)
1.92
0.00
2.40
23.97
23.14
0.00
0.00
0.00
0.00
19.21
0.00
14.34
0.00
7.29
o.oo
b.fc9
0.00
0.00
1.04
0.00
.70
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
2.42
24.20
23.36
0.00
0.00
0.00
0.00
19.95
0.00
12.46
9.80
0.00
0.00
6.76
0.00
0.00
1.05
0.00
.50
112
18.6
49.5
24.9
7.0
.09
.47
3-C0nP0NENT
WT.PERCENTS
F 61.64
M 25.00
A 13.36
F 53.05
C 35.46
A 11.50
N 21.41
K 3.07
C 75.52
1 001
POTASbIC TRACHYT'-
08.56N 39.56E, S.l. :>ASE Or FANTALl. SHOA
L. DUPARC AND f. MOLLY, 1977A
SI02
TI02
AL203
FF.2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H20*
H20-
C02
S03
TOTAL
OKICJIMAI
ANALYSIS
64.84
.42
13.44
3.77
1.50
0.00
.21
1.04
2.R5
6.32
0.00
1.34
0.00
0.00
0.00
0.00
0.00
0.00
0.00
95.73
kATER~
68.69
.44
14.24
3.99
1.59
o.oo.22
1.10
3.02
6.70
0.00
C02?FREE
(100.0)
SITI
ALFt3
FL2MN
MGCA
NAK
PH*
H-C
S
0
ATOMS
HEIGHT
30.29
.25
7.11
2.64
1.17
0.00
.13
.74
2.11
5.25
0.00
.02
0.00
0.00
0.00
46.02
ATOMS
NUMBERS (100.0)
24.18
.12
5.91
1.06
.47
0.00
.12
.42
2.06
3.01
0.00
62.66
MCiU/MGO + FEO
IH FtMICS =
WEIGHT NORM
(100.0)
22.64
0.00
39.68
25.61
5.45
0.00
0.00
0.00
0.00
.02
0.00
.55
0.00
3.65
1.35
.64
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
19.08
0.00
39.98
25.81
5.50
0.00
0.00
0.00
0.00
.02
0.00
8.75
0.00
0.00
0.00
.85
0.00
0.00
0.00
0.00
NIG&LI
SIAL
FM
CALK
K
MG
TI
P
C/FM
QZ
320
39.
21.
5.
33.
1.
0.
85
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
KC
35.97
1.43
62.59
34.04
6.7?
59.24
77.91
61.90
10.19
No. 1081
REMARKS: Loss on heating 1.34%. The work of Lacroix
(1930) suggests that in this analysis the values for Na,O
and K2O have been transposed. The low summation
suggests an incomplete analysis or an error in one of
the oxide values.
MINERALOGY: Phenocrysts: Abundant, flow-aligned
alkali feldspar (2V = 43?); rare grey augite; crocidolite?.
Groundmass: Glass with microlite trains, crocidolite
with quartz rims.
OTHER INFORMATION: Specimen from large flow
reaching nearly to railway. Grey scoriaceous surface
to flow.
No. 1082
REMARKS: Loss on heating 2.40%.
MINERALOGY: Dark basaltic rock. Phenocrysts: Zoned
titanaugite, magnetite octahedra. Groundmass: Brown
glass with microlites of augite, magnetite, plagioclase.
No. 1083
REMARKS: No separate determination of H2O-.
MINERALOGY: Flow-texture. Phenocrysts: Andesine,
rare olivine with reaction rims. Groundmass: Feldspar,
augite, magnetite, ilmenite, rare glass.
1082
AuGITITE
09.00N 37.30E, KALLU STREAM,
L. DUPARC AND L. MOLLY, 19271:
F. OF GHEDO, SHOA
S102
TI02
AL203
FE2O3
FF.O
MNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
42.04
4.18
13.66
6.43
9.51
0.00
S.98
11.33
2.53
2.46
0.00
2.40
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.52
WATER-C02-FREE
(100.0)
42.85
4.26
13.92
6.55
9.69
0.00
6.09
11.55
2.58
2.51
0.00
SITI
ALFE3
FE2MN
MCj
CANA
KP
H+
H-C
5
ATOMS
WEIGHT
19.64
2.51
7.23
4.50
7.39
0.00
3.61
8.10
1.88
2.04
0.00
.03
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
16.28
1.22
6.23
1.88
3.09
0.00
3.46
4.70
1.90
1.22
0.00
DI
WO
MGO/MGO+FEO
IN FLMCS =
HEIGHT NORM
(100.0)
0.00
0.00
14.84
3.80
18.96
9.78
0.00
0.00
0.00
30.85
0.00
0.00
4.17
9.52
0.00
8.08
0.00
0.00
0.00
0.00
NON-OXlDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.98
0.00
19.20
11.99
6.31
0.00
0.00
32.54
0.00
0.00
14.79
0.00
0.00
8.18
0.00
0.00
0.00
0.00
91
17.5
p
C/FM
OZ
0
-44
.00
.56
3-COMPONENT
V.T.PERCENTS
F 59.23
M 22.22
A 18.54
F 49.41
C 35.1?
A 15.47
N 15.50
K 15.07
C 69.4?
1083
ScORIACEOuS ANi.ESINE BASALT
13.39N 42.09E, uAHARASSOLl, ERITREA
P. C0MUCC1, 1928
EI02
TIU2
AL203
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
47.08
1.59
17.59
10.49
1.45
.27
4.11
9.85
2.72
1.83
? 23
2.72
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.93
wATER?
48.43
1.64
18.09
10.79
1.49
.28
4.23
10.13
2.80
1.88
.24
C02?FREE
(100.0)
SITI
ALFE3
FE2MN
MGCA
NAK
P
H+
H-
C
S
ATOMS
WEIGHT
22.00
.95
9.31
7.34
1.13
.21
2.48
7.04
2.02
1.52
.10
.03
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.77
.45
7.82
2.98
.46
.09
2.32
3.98
1.99
.88
.07
0a
ORAd
AN
NELC
AC
NSDI
WOHY
OLMT
H1*IL
TIRU
APCC
MGU/MGO+FEG
IN FEMICS =
whlCHT NORM
(100.0)
1.21
0.00
11.15
23.72
31.21
0.00
0.00
0.00
o.oo13. R3
0.00
4.14
0.00
.99
10.13
3.10
0.00
0.00
.52
0.00
1.00
NON-OxIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
11.3821.22
31.87
1.62
0.00
0.00
0.00
15.24
0.00
0.00
14.96
0.00
0.00
3.17
0.00
0.00
.53
0.00
SIAL
FM
CALK
117
25.
38.
26.
9.
3-COMPONENT
WT.PERCENTS
F 57.96
M 19.95
A 22.09
F 45.33C 37.40
A 17.27
N 18.89
K 12.71
C 66.40
1084
APHYR1C BASALT
13.10I-I 42.25E*
P. COMUCCI, 1920
dEILUL, ERITREA
SI02
TIU2
AL203
FE203
FEO
MNU
MGO
CAO
NA20
K20
P205
H20+
H20-
C02
SO 3
TOTAL
0
CBOR
A3AN
NELC
AC
NSDI
WOHY
OL
HT
HI
ILTI
RUAP
CC
OKJGIMAL
ANALYSIS
4d.84
3,00
11.00
13.12
4,06
.20
6.01
10.75
1.56
1.64
0.00
.23
0.00
0.00
0.00
o.oo0.00
0.00
0.00
100.41
HtilGHT NORM
(KiO.O)
8.94
0.00
9.fc9
13.20
la.11
0.00
0.00
0.00
0.00
27.43
o.oo2.26
0.00
5.07
9.63
5.68
O.OO
0.00
0.00
0.00
WATER-C02-FKEE
(100.0)
48.75
2.99
10.98
13.10
4.05
.20
6.00
10.73
1.56
1.64
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0,00
9.94
13.54
18.57
0.00
0.00
0.00
0.00
30.31
0.00
18.05
3.75
0.00
0.00
5.H3
0.00
0.00
o.ooo.oo
SITl
AL
FE3FE2
MNMG
CA
NAK
PH*
H-
CS
0
ATOMS
HEIGHT
22.82
L.80
5.82
>.18
9.16
.15
S.63
r.68
.16
.36
).00
.00
).00
>.oo1.00
43.66
NIGGU
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
ATOMS
NUMBERS
18.33
.85
4.87
3.71
1.28
.06
3.37
4.33
1.14
.79
0.00
61.28
113
15.1
52.2
26.8
6.0
.41
.40
5.2
0.00
.->1
-10
(100.0)
3-COMPONENT
WT
NK
C
D.I.
PERCENTS
65.10
22.77
12.13
55.19
34.53
10. ?B
ll.lfl
11.76
77.0A
74.0ft
IN FLr.ICS = l.OU
No. 1084
REMARKS: No separate determination of H2O-.
MINERALOGY: Groundmass: An57-60, red-brown
titanaugite, rare altered olivine, rare glass, abundant
magnetite.
No. 1085
REMARKS: Decarbonated with acetic acid prior to
analysis; the exceptionally high CaO in the remaining
rock suggests that contamination from the dissolved
calcite has occurred (see Hieke-Merlin, 1950). No
separate determination of HLO-.
MINERALOGY: Groundmass: Labradorite, augite,
altered Fe-rich olivine, dark glass; calcite-filled
vesicles up to 1 cm diameter; no zeolites.
OTHER INFORMATION: Calcitic scoria also occur on
the Asbol plain, 20 km from Assab. Manasse (1908)
also mentions the presence of calcitic rocks from this
region.
No. 1086
REMARKS: See important note under 1085.
MINERALOGY: Phenocrysts: Large fresh olivine.
Groundmass: Abundant glass with labradorite microlites.
OTHER INFORMATION: Weathers with iron-rich sur-
face. Other specimens less rich in calcite vesicles
contain labradorite phenocrysts, with decomposed
olivine, rare augite and glass, and magnetite in the
groundmass.
1085
SCORIACfcOuS CALCITIC BASALT (DECARBONATED BEFORE ANAL.)
13.ION 42.25E, LjEILUL, ERITREA
P. COMUCCI. 1920
SI02
TI02
ALZ03
FE2O3
FEO
MNO
M30
CAu
NA20
K2J
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49.05
1.65
a. 50
10.80
5.45
.16
5.IB
16.70
1.70
.78
0.00
1.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.99
WATER-C02-FREE
uoo.oi49.05
1.65
8.50
10.80
5.45
.18
5.18
16.70
1.70
.78
0.00
SITI
ALFE3
FE2MN
Mi
CANA
K
PH?
H-C
S
ATOMS
hEI&HT
22.92
.99
4.50
7.55
4.24
.14
3.12
11.94
1.26
.65
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
IB.61
.47
3.80
3.09
1.73
.06
2.93
6.79
1.25
.3b
0.00
0
eraOR
ARAN
NE
LCAC
NSDI
WOHY
OL
MTHM
ILTI
RUAP
CC
MG0/MGO*FEO
IN FEMCS =
WEIGHT NORM
(100.0)
7.56
0.00
4.62
14.41
13.23
0.00
0.00
0.00
0.00
27.89
14.18
0.00
0.00
13.41
1.57
3.13
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.72
11.35
13.51
1.82
0.00
0.00
0.00
60.17
0.00
0.00
5.24
0.00
0.00
3.20
0.00
0.00
o.oo
0.00
.42
SIAL
FM
CALK
107
11
45
39
4
3-COMPONENT
WT.PERCENTS
F 67.96
M 71.66
A 10.37
F 45.H7
C 47.14
A 7.00
N 8.86
K 4.07
C 87.07
1066
OLIVINE BASALT (OECARRONATEu bEFORE ANALYSIS)
13.1011 42.25E, HEILUL, ERITREA
P. COMUCCI. 192b
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAU
NA20
K20
P205
H2U*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49. 28
.33
U.10
b.oe
5.61
.32
6.8H
1?.55
ueo1.03
0.00
1.75
0.00
0.00
0.00
0.00
0.00
0.00
o.oo100.73
WATER-C02-FRLE
(100.0)
49.79
.33
8.18
8.16
5.67
.32
6.95
17.73
1.82
1.04
0.00
SITI
ALFE3
Ffc2
MN
M?j
CANA
K
P
H+
H-C
S
ATOMS
WEIGHT
23.02
.20
4.29
5.65
4.36
.25
4.15
12.54
1.34
.86
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.73
.09
3.63
2.31
1.79
.10
3.90
7.15
1.33
.50
o.oo
0
CI3
OR
ABAN
NELC
ACNS
DI
woHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO-fFEO
IN FELhICS =
HEIGHT NORM
(100.0)
1.63
0.00
6.16
15.41
11.06
0.00
0.00
0.00
0.00
44.42
8.83
0.00
0.00
11.86
0.00
.63
0.00
O.CO
0.00
0.00
.86
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.26
4.65
11.24
5.96
0.00
0.00
0.00
65.36
0.00
0.00
5.89
0.00
0.00
.64
0.00
0.00
0.00
0.00
.50
104
10.
TIP
C/FM
OZ
.5
0,00
.88
-16
3-COMPONENT
WT.PERCENTS
F 58.50
M 29.40
A 12.09
F 40.18
C 51.51
A 8.31
N 8.83
K 5.05
C 86.11
10S7
OLlVlnlE HA SALT
13.00N 42.42E,
P. C0MUCC1, 192 8
.-IT. SU.LA, A5SA.
SI02
TI02
AL2O3
FE203
FEu
MNO
MGU
CAO
NA2O
K2U
P2U5
H2U*
H2O-
CO2
SO3
TOTAL
OKlfelrSAL
ANALYSIS
49.26
1.83
14.36
6.38
B.16
.57
5.46
10.56
1.67
.58
0.00
2.11
0.00
0.00
O.no
0.00
0.00
0.00
0.00
100.96
TEK?C02?FkfcE
(100.0)
.85
.65
.53
.45
.25
.58
.52
.68
.69
.59
.00
51TI
ALFL3
FE2MN
Mo
CANA
KP
H +
H-C
S
ATOMS
WEIGHT
23.02
1.10
7.60
4.46
6.34
.44
3.29
7.55
1.24
.48
0.00
.03
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.52
.52
6.36
1.81
2.57
.18
3.06
4.26
1.22
.28
0.00
0
c^cm
APAN
NELC
ACNS
DIwo
HY
OLMT
Hy
ILTI
RU
AP
CC
fttlCHT H0?h
(100.01
7.P4
0.00
3.47
14.32
30.30
0.00
0.00
0.00
0.00
IB.54
0.00
12.63
0.00
9.38
0.00
3.51
0.00
0.00
0.00
0.00
NON-OXlDATION NONM
(FE203 CONVEKTED TO FEO)
1.04
0.00
3.52
14.50
30.68
0.00
0.00
0.00
0.00
19.44
0.00
27.27
o.oo0.00
0.00
3.56
0.00
0.00
0.00
0.00
MGO/MGOthtO
IN FEMCS =
11720
3-COMPONENT
wT.PERCENTS
FM
A
F
C
65
74
10
53
38
.35
.54
.11
.16
.61
No. 1087
REMARKS: See under 1085.
MINERALOGY: Very fresh rock. Phenocrysts: Yellow-
green olivine. Groundmass: Flow-texture; glass,
labradorite, magnetite, calcite (primary?); no pyroxene.
OTHER INFORMATION: See under 1001.
No. 1088
REMARKS: No separate determination of H-O-.
MINERALOGY: Groundmass: Andesine-labradorite,
augite, magnetite-ilmenite more abundant than in 1083,
rare glass.
No. 1089
REMARKS: No separate determination of H^O-.
MINERALOGY: Phenocrysts: Labradorite-bytownite.
Groundmass: Pale-brown glass, abundant magnetite
and ilmenite?; rather uncommon plagioclase microlites,
brown augite, scarce altered olivine.
OTHER INFORMATION: Olivine-andesine trachybasalt
from Dadda-ho contains ca. 61% SiO_; vetrose olivine
basalts reported from Foroddu (with calcite scoria),
Ela, Ulului, Doctummo (with calcite scoria); olivine
basalts reported from Dubbi, Addula, Dioita.
1088
APHYR1C BASALT
P. C0MUCC1. 1928
AHARASSOLI. ERITREA
SI 02
TI02
AL2O3
FE2O3
FEU
MNU
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
SOi
TOTAL
ORICiIMAl
AUALYSI;
49.95
1.35
12.95
7.53
7.41
.30
5.54
11.1?
2.06
1.15
0.00
1.45
o.co0.00
U.00
0.00
0.00
0.00
0.00
loo.ei
WATER-C02-FREE
(100.0)
50.27
1.36
13.03
7.58
7.46
.30
5.58
11.19
2.07
1.16
0.00
SI
Tl
AL
FL3
Ffc2
MN
MG
CA
NA
K
P
H +
H-
C
S
ATOMS
?.EIGHT
23.34
.81
6.85
5.27
5.76
.23
3.34
7.95
1.53
.95
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.71
.38
5.72
2.13
2.33
.10
3.10
4.47
1.50
.55
0.00
0
en
OR
AH
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HV
IL
TI
RU
AP
C.
MGU/MGO+FtO
IN FE'IKS =
FLIGHT NOKM
(100.0)
5.78
0.00
6.85
17.57
22.si
0.00
0.00
0.00
0.00
26.45
0.00
6.94
0.00
11.PI
0.00
2.5a
0.00
o.nn
0.00
0.00
.7ft
NON-OXlDATION NORM
((-E2O3 CONVEKTEl) TO FEO)
0.00
0.00
6.95
17.83
23.14
0.00
0.00
0.00
0.00
28.05
0.00
14. b2
6.59
0.00
0.00
2.62
0.00
0.00
0.00
0.00
.44
117
17.9
3-C0MP0NENT
WT.PERCtNTS
F
M
A
F
C
A
N
K
C
63.0b
23.39
13.55
51.04
37.99
10.97
14. 3H
8.03
77.60
1089
PORPHYRITlC SASA, T
13.34N 41.05E, GHtLELI VOLCANO,
P. COMUCCI, 19k;H
N. CF L. JULI^UI
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2o
P2U5
H20 +
H20-
CO2
SOJ
TOTAL
ANALYSIS
51.95
i.12
14.12
b.52
10.23
.35
4.68
9.22
1.47
.49
0.00
.52
0.00
0.00
0.00
0.00
0.00
0.00
0.00
10U.B7
51.77
2.11
14.07
5.50
10.19
.35
4.86
9.19
1.46
.49
0.00
SI
Tl
AL
FE3
Ft2
MN
M&
CA
NA
K
P
H*
H-
C
S
ATOMS
hEIGHT
24.27
1.27
7.47
3.86
7.95
? 27
2.94
6.59
1.09
.41
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
19.23
.59
6.16
1.54
3.17
.11
2.70
3.66
1.06
.73
0.00
0
aOR
A3
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FEU
IN FtCICS =
t,ElCHT NORM
(100.0)
12.43
o.no
i.89
12.42
30.36
0.00
0.00
0.00
0.00
12.65
0.00
17.25
0.00
7.99
0.00
4.C1
0.00
0.00
O.CO
0.00
.58
NON-OX IDATION NORM
(FE2O3 CONVFIUEO TO FEO)
6.69
0.00
2.92
12.55
30.68
0.00
0.00
0.00
0.00
13.11
0.00
29.99
0.00
0.00
0.00
4.05
0.00
0.00
0.00
0.00
.40
129
20.7
4.0
0.00
.49
3-COMPONENT
WT.PtRCENTS
F 69.72
M 21.60
A 8.68
F 58.48
C 34.74
A 7.2H
N 13.15
K 4.3H
C 8?.47
1090
SCORIACEUUS HYALO-TRACHVIT
13.3811 42.07E. |',AhARA5S0LI ,ATl?kH0L?. ERITREA
P. COhUCCI, 19^8
SI02
TI02
AL2O3
FC2O3
FEO
MNU
MGO
CAU
NA2O
P2O5
H2u*
H2O-
CO2
SO3
Oh Id'ML
ANALYSIS
59.60
1.19
15.82
4.93
3.C5
1.02
l.Ofl
5.05
3.36
.29
1.170.00
0.000.00
I.ATER-C02-FREE
(100.0)
59.72
1.19
15.85
4.94
3.06
1.02
l.oa
5.06
3.37
4.42
SI
TJ
AL
Ft3
FL2
IN
Mo
CA
NA
K
ATOMS
HEIGHT
27.
a.
3.
2.
3.
2.
3.
85
71
37
45
37
79
65
61
49
66
ATOMS
NUMBERS (100.0
21.47
.3?
6.72
1.34
.92
.31
.58
1.9S
2.35
2.03
0
cn.OR
AB
AM
NF
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RJ
AP
CC
Irt Hi H.
khlfHT i\Of.M1100.0)
12.490.00
26.IB2b.55
1 b ? 0 3
0.00
0.00
0.00
0.00
6.H3
0.00
? H5
0.00
r.m0.00
2.26
0.00
0.00
? f>4
o.no
.5 = .71
NON-OXIDATIOM NORM
(KE2O3 CO/NVFKTEI) TO FEO)
7.33
0.00
26.43
28.82
15.17
0.00
0.00
0.00
0.00
7.37
0.00
11.95
0.00
0.00
0.00
2.28
0.00
0.00
.64
0.00
.22
MGGLI
SI
AL
F-M
C
ALK
K
MG
TI
P
C/FM
OZ
201
31.5
29.6
18.3
20.6
.4
.1
3.0
.4
.6
19
3-COMPOKENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
47.42
6.42
46.17
38.37
24.2H
37.36
26.21
34.40
39.39
No. 1090
REMARKS: No separate determination of H_O-; notably
rich in manganese and potassium.
MINERALOGY: Groundmass: Brown glass with plagioclase
and rare augite microlites.
No. 1091
REMARKS: No separate determination of FeO or H^O-.
MINERALOGY: Groundmass: Glass with elongated
vesicles; signs of incipient crystallisation.
No. 1092
REMARKS: No separate determinations of FeO or H-jO;
too many terminal zeros in analysis, and summation is
low.
MINERALOGY: Groundmass: Glass with rare microlites.
OTHER INFORMATION: An alkaline rhyolite scoria from
SW of Dubbi contained ca. 70% SiO? and was composed
of glass with corroded sanidine and aegirine-augite.
1091
PHY0L1T1C PUMICE.
13.ION 42.25E,
P. COMUCCI, 1920
bElHIL. ERITREA
SIU2
TI02
AL2O3
FE2O3
FEO
MNO
MOO
CAG
NA20
K20
P205
H20?
H20-
C02
503
TOTAL
OKIGINAL
ANALYSIS
69.55
0.00
10.91
4.84
0.00
0.00
.45
2.79
3.78
3.05
0.00
4.70
0.00
0.00
U.00
0.00
0.00
0.00
o.oo
100.07
wATER-C02-FhEE
(100.0)
72.93
0.00
11.44
5.07
0.00
0.00
SI
TI
AL
Ft3
Ft2
MN
MG
CA
NA
K
P
H*
H-
C
5
ATOMS
wEIGHT
32.49
0.00
5.77
3.39
0.00
0.00
.27
1.99
2. BO
2.53
0.00
.06
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.35
0.00
4.69
1.33
0.00
0.00
.24
1.09
2.67
1.42
0.00
DI
wo
HEIGHT NOHM
(1OO.O)
3^.79
0.00
lb.95
33.62
3.92
0.00
0.00
0.00
0.00
2.54
3.08
0.00
O.CO
0.00
5.09
0.00
0.00
0.00
0.00
0.00
III FEMCS = 1.00
NON-OX IDATION NORM
(FE2O3 CONVERTED TO FEO)
29.63
0.00
19.14
33.95
3.96
0.00
0.00
0.00
0.00
9.37
0.00
3.95
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.17
3-COMPONENT
WT.PERCENTS
F 39.93
M 3.71
A 56.35
F 33.47
1092
RHYOLITE Or>ML>IAr>
13.2ON 41.40E,
P. COMUCCI, 1928
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ANALYSIS
69.73
0.00
13.67
5.00
0.00
0.00
? 28
1.50
4.00
3.95
0.00
.50
0.00
0.00
0.00
o.no
o.oo
0.00
0.00
98.B3
KATER-C02-FREE
(100.0)
14.11
5. 08
0.00
1.53
4.07
SI
TI
AL
Ft3
Ft2
MN
M&
CA
NA
K
P
H*
H-
C
S
ATOMS
HEIGHT
32.58
0.00
7.34
3.50
0.00
0.00
.17
1.07
2.97
3.28
0.00
.01
0.00
0.00
0.00
ATUMS
NUMBERS 1100.0)
24.64
0.00
5.78
1.33
0.00
0.00
.15
.57
2.74
1.78
0.00
wLlGHT UOPC.
(100.0)
28.02
.26
23.81
34.51
7.59
0.00
0.00
0.00
0.00
0.00
0.00
.71
0.00
0,00
5.10
0,00
0.00
0,00
o.no
0.00
NON-OXIDATION NORM
(FE2O3 COWEKTED TO FEO)
24.81.27
24.04
34.85
7.66
0.00
0.00
0.00
0.00
0.00
0.00
8.37
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SIAL
FMc
ALK
K
MG
TI
P
C/FK
UZ
342
40.1
20.6
7.9
31.5
.39
.10
0.0
0.00
.38
116
3-tOMPONENT
WT.PERCENTS
F 37.79
34.60
10.3ft
55.02
42.33
41.80
15.87
MGO/MGOtl-LU
lA FEMC5 =
1093
*K?NYITE? )Yft
0H.53N 37.03E, .iT.rO
L. DUPARC Mb L. hOLLY 1-/28A
WEAK -ilLLO, *OLLE.t>A
SI02
TI02
AL2O3
FE2O3
FEU
MNO
MGO
CAO
NA^U
K2O
P2O5
H2O*
H2O-
C02
S03
TOTAL
AUALYSli
53.77
.57
21.47
3.54
1.80
0.00
.78
2.1b
H.03
4.24
.14
3.67
0.00
0.00
0.00
O.UO
0.00
0.00
0.00
100.16
55.73
.59
22.25
3.67
1.87
0.00
.Ul
2.23
8.32
4.39
.15
SITI
AL
Ffc.3
Ft2MN
MfaCA
NAK
PH*
H-c
s
ATOMS
HEIGHT
25.12
.34
11.36
2.48
1.40
0.00
.47
1.54
5.96
3.52
.06
.04
0.00
0.00
0.00
ATOMS
NUMHEHS (100.0
19
9
0
5
1
58
16
22
97
55
00
42
84
67
97
04
0C"
ORAD
ANNE
LCAC
N501
WOHY
OLMT
HH
ItTI
RU
APCC
MGO/MGOtFEO
IN FEM1CS =
VILIGHT MOKM
(100.01
0.00
? 02
26.03
3M.44
10.23
17.41
0.00
0.00
0.00
0.00
0.00
0.00
L.41
4.32
.70
1.12
0.00
0.00
.32
0.00
1.00
NOM-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
.02
26.22
34.75
10.30
19.68
0.00
0.00
0.00
0.00
0.00
0.00
7.59
0.00
0.00
1.13
0.00
0.00
.32
0.00
.25
NIQbLl
SIAL
FMC
ALKK
MGTI
P
C/FM
UZ
174
41.
17.
34.
1.
-62
3-COMPONENT
WT.PERCENTS
F 79.04
H 4.24
A 66.72
F 27.02
C 10.88
A 62.10
N 55.69
K 29.40
C 14.91
No. 1093
REMARKS: MnO trace. Loss on heating, 3.67%;
published summation of 100.02%.
MINERALOGY: Phenocrysts: Very corroded anortho-
clase, up to Z cm length. Groundmass: Glass with
anorthoclase and femic microlites; rare apatite,
magnetite, hornblende, no nepheline(?).
OTHER INFORMATION: Occurs as large dyke.
No. 1094
REMARKS: Loss on heating, 1.96%.
MINERALOGY: Phenocrysts: Very abundant; large
titanaugite; olivine, magnetite octahedra, scarce
plagioclase which is younger than the other phenocrysts.
Groundmass: Augite, magnetite, rare biotite, An56,
no glass.
No. 1095
MINERALOGY: Compact dark rock. Groundmass: Fresh
brown glass, andesine-labradorite microlites, some
decomposed femics?.
1094
*TOKE1TE# oAUGlTF-ULlVlUE ^,ASALT?
08.4fliM 37.42t. L. ARfcTE MT. TUKAy,
L. DUPARC AND k, MOLLY, 19281
UPPER GUUER VALLEY, SriOA
S102
T1O2
AL203
FE2O3
FEU
MNO
MGO
CAO
NA20
K20
P2U5
H20*
H20-
C02
S03
TOTAL
ORI&IMAi.
ANALYSIS
43.60
Z.22
10.65
3.53
7.15
0.00
12.62
17.42
1.30
.55
0.00
1.96
0.00
0.00
0.00
0.00
0.00
0.00
0.00
101.00
i?ATER-C02-FHEE
(100.0)
44.02
2.24
10.75
3.56
7.22
0.00
12.74
17.59
1.31
.56
0.00
SI
Tl
AL
FL3
Ft2
MN
Mt>
CA
Hh
K
P
H?
H-
C
5
ATOMS
WEIGHT
20.37
1.33
5.63
2.47
5.56
0.00
7.61
12.45
.96
.46
0.00
.02
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
16.40
? f>3
4.7?
1.00
2.25
0.00
7.09
7.02
.95
.26
0.00
NORM 5102 LEFIC1T -I.h9
0
CF)
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO-ff-LO
IIM F-EMCS =
w?l&HT NORM
(100.0)
0.00
0.00
0.00
U.OO
il.78
6.03
2.58
0.00
0.00
52.11
0.00
0.00
9.78
5.IB
0.00
4.25
0.00
o.uo0.00
0.00
.at
-3.55
NON-OX I DAT I UN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
21.93
6.07
2.60
0.00
0.00
53.41
0.00
0.00
15.33
0.00
0.00
4.28
0.00
0.00
0.00
0.00
.74
3-COMPONENT
WT.PEHCENTS
F 42.47
M 50.1H
A 7.3b
F 35.66
C SS.16
2.85
90.40
1095
APHYUIC BASALT
15.23IM 44.0S(E,
P. C0MUCC1. 1930
5102
T1U2
AL2O3
FE2O3
FEO
MNO
M30
CAO
NA20
K20
P2O5
H20 +
H20-
cot
503
TOTAL
OI<I?INAL
A11ALYSIS
50.30
3.18
15.93
4.24
9.25
.13
3.64
7.92
2.39
1.25
0.00
.95
.90
0.00
0.00
0.00
0.00
0.00
0.00
100.08
51.21
3.24
16.22
4.32
9.42
.13
3.71
8.06
2.43
1.27
0.00
SI
TI
AL
FL3
Ft2
MN
MG
CA
NA
P
H?
H-
C
s
ATOMS
fttlGHT
23.50
1.91
8.43
2.97
7.19
.10
2.20
5.66
1.77
1.04
0.00
.01
.01
0.00
0.00
ATOMS
NUl-ihEtfb (100.0)
IB.90
.90
7.06
1.20
2.91
.04
2.04
3.19
1.74
.60
0.00
0
CB
OR
AH
AN
NE
LC
AC
NS
Dl
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGU/MGO*FtO
IN FLK'ICS =
KtlGHT NOPM
1100.0)
7.!>7
0.00
7.54
20.63
29.54
0.00
0.00
0.00
0.00
8.71
0.00
13.60
0.00
6.27
0.00
6.14
0.00
0.00
. 0.00
0.00
.58
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
3.03
0.00
7.60
20.80
29.79
0.00
0.00
0.00
0.00
9.01
0.00
23.57
0.00
0.00
0.00
6.20
0.00
0.00
0.00
0.00
.39
SI
AL
FM
C
ALK
K
MG
TI
P
C/FW
CJZ
134
25.0
44. u
22. /
8.3
.33
6.4
0.00
.52
1
3-COMPONENT
WT.PERCENTS
F h4.95
M 17.53
A 17.53
F 53.85
C 31.62
A 14.53
N ?0.67
K 10.81
C 68.51
1096
ALKALI TRACHYTE
15.23N 44.15E.
P. COMUCCI. 1930
10KM E. OK SAN?A, YEMEN
SI02
TI02
AL2O3
FE203
FEO
UNU
M50
CAO
NA20
K20
P2O5
H?0*
H2U-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
68.30
.42
11.88
2.61
1.88
.54
.80
2.20
2.94
b.Ol
0.00
2.74
1.31
0.00
0.00
0.00
0.00
0.00
0.00
100.63
wATER-C02-Fk?E
(100.0)
70.72
.43
12.30
2.70
1.95
.56
.83
2.28
3.04
5.19
0.00
SITl
ALFL3
FL2
MM
M0>
CA
NA
K
P
H+
H-
C
S
0
ATOMS
wEI&HT
31.91
.25
6.29
1.83
1.46
.42
.48
1.57
2.18
4.16
0.00
.03
.02
0.00
0.00
50.03
ATUMS
NUMBERS (100.0)
24. Rl
.11
5.09
.71
.57
.17
.43
? H6
2.07
2.32
0.00
62. 85
0
CR
OR
AR
AN
NFLC
AC
NS
DI
MO
HY
OL
MT
H *
IL
TI
P'l
A i'
CC
WGO/MGO?i ! 0
IH FEMCb =
K?lbHT NORM
(100.0)
27.58
0.00
30.74
25.82
4.52
0.00
0.00
0.00
0.00
5.60
0.00
.09
0.00
3.93
0.00
.83
0.00
0.00
0.00
0.00
.62
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
24.860.00
30.90
25.964.54
0.000.00
0.00
0.005.91
0.00
7.01
0.000.00
0.00.83
0.00
0.000.00
0.00
.26
c
ALK
33134
25
3-COMPONENT
WT.PEHCENTS
F
M
A
F
C
A
N
K
C
33.91
6.04
60.05
30.67
15.03
54.30
28.97
49.36
71.67
No. 1096
MINERALOGY: Phenocrysts: Corroded anorthoclase.
Groundmass: Anorthoclase, possible orthocalse, ra"re
plagioclase, aegirine-augite, brown glass, no quartz
or cossyrite.
OTHER INFORMATION: Specific gravity 2. 577. Also
from the San'a Valley: vitric sanidine rhyolite contains
77.32% Si?2, Na-plagioclase and augite rock contains
58.90% SiO2.
No. 1097
REMARKS: In Duparc (1930a, b) there are no separate
water determinations, only loss on heating.
MINERALOGY: Phenocrysts: Olivine, rare augite.
Groundmass: Labradorite, magnetite, augite, scarce
olivine, common glass.
OTHER INFORMATION: Dyke cuts birbirite near Yubdo.
No. 1098
REMARKS: See under 1097.
MINERALOGY: Phenocrysts: Olivine, magnetite, rare
augite. Groundmass: Gray augite, magnetite, microlites
of labradorite, rare olivine.
1097
OLlVlNE BASALT jyKL (IN EASE.*! NT ULTRAoASICS)
08.57(1 35.26E. YUPPO, WCLLtGA
L. DUPARC. 19 30*
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
C02
SO3
TOTAL
ANALYSIS42.47
3.25
14.45
3.55
9.48
.79
9.42
10.40
2.65
2.00
0.00
1.40
o.oo
o.oo
0.00
0.00
0.00
0.00
0.00
99.86
?ATER-C02-Fl<EEUOO.O)
43.133.30
14.66
3.619.63
.809.57
10.562.69
SITl
ALFt3
FE2MN
Mb
CA
NA
K
P
H+
H-
Cs
ATOMS
WEIGHT
19.84
1.95
7.65
2.48
7.37
.61
5.6H
7.43
1.97
1.66
0.00
.02
0.00
0.00
0.00
ATOKS
NUMBERS 1100.0)
16.13
.93
6.47
1.02
3.02
.25
5.34
4.23
1.95
? 97
0.00
0
enOR
AnAN
NELC
AC
NS
DIwn
HY
OLMT
HM
1LTI
RU
APCC
MGO/MGO+KEO
IN FEMCS =
KEI&HT NO^K
(100.0)
o.no
0.00
12.03
2.36
21.92
11.OB
0.00
0.00
0.00
24.69
0.00
0.00
16.43
5.24
0.00
6.26
0.00
0.00
0.00
0.00
.74
NON-OXIDATION NORM
OE203 CONVERTED TO FEO)
0.00
0.00
8.27
0.00
22.07
12.44
3.01
0.00
0.00
25.29
0.00
0.00
22.61
o.oo
0.00
6.30
0.00
0.00
0.00
0.00
.62
SIAL
FM
C
ALK
<MS
TI
P
C/FM
QZ
87
17.4
51.9
22.a
7.9
.33
.55
5.0
0.00
.44
-45
3-COMPONENT
WT.PtRCENTS
F 48.08
M 34.76
A 17.16
F 46.40
C 37.04
A 16.56
13.29
69.10
1098
OLlVlNE bASALT
09.03N 36.16E,
L. DUPARCi 1930A
STREA*, E. OF DIOESSA BRIDoU wOLLEGA
SIU2
TIU2
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOIAL
OHI&IMAi.
ANALYSIS
44.29
2.51
14.76
6.36
6.12
.43
9.12
11.74
2.07
1.16
.49
1.30
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.35
WATER-C02-FREE(100.0)
44.71
2.5314.90
6.42
6.13.43
9.21
11.852.09
1.17
.49
SITI
ALFt3
Ft2
MNMCi
CA
NAK.
P
H +
H-C
s
ATOMS
WEIGHT
20.69
1.50
7.81
4.45
4.76
.33
5.50
8.39
1.54
.96
.21
.02
0.00
0.00
0.00
ATOMS
NUMBEKS 1100.0)
16.57
.71
6.51
1.79
1.42
.14
5.09
4.71
1.50
.55
.16
HEIGHT '10MM
(100.0)
0.00
0.00
6.93
16.30
27.79
.77
0.00
o.ooo.oo
22.23
o.oo
o.oo
10.77
9.33
0.00
4. el
0.00
0.00
1.08
0.00
NON-OXIDATION NORM
(f-E2O3 CONVERTED TO FEO)
0.00
0.00
7.02
9.02
2B.13
4.83
O.OO
0.00
0.00
23.43
o.oo
o.oo
21.61
o.ooo.oo
4.87
0.00
0.00
I.100.00
5.7.27
3-COMPONENT
wT.PERCENTS
F 50.2h
M 36.7?
A 13.01
F 45.4f>
C 42.77
A 11.77
N 13.83
K 7.75C 78.4?
IN FEMCb =
1099
rAbALT
OB.54(1 37.00E,
L. DUPARC, lSCi
bODDO rOL, L. OF ;(AMA PIvER, wOLLEdA
Slu2
TI02AL203
FE2Q3
FCO
MNO
MGO
CAU
NA2OK2O
P2O5H2U*
H2O-
CO2
SO3
TOTAL
AhALYSI44.99
2.t416.20
6.245.H6
.41
&.B99.51
1.P21.69
.34
1.800.00
0.00
0.000.00
0.000.00
0.00100.39
ATER-C02-FKLE(100.0)
5.632
6
6
5
9
9
1
1
.68
4333
94
42
02
65
85
71
34
SITl
AL
Ft3FE2
MMMG
CA
hk
K
V
H*
H-
C
5
ATOMSHEIGHT
21.021.58
8.574.36
4.55
.32
5.366.80
1.351.40
.15
.02
0.000.00
0.00
ATi. S
NUMBERS (100.0)16.Hi
7
1
1
4
3
1
74
14
76
R3
13
96
81
32
HI
11
0
CP
OR
ABAN
NELC
ACN5
DI
WO
HY
01
MT
HW
IL
TIRU
APcc
MGO/MGln-KEO
IN FtKlLS =
wtlGHT NOI'.M
(100.0)
0.000.00
10.1515.65
31.45
0.000.00
0.000.00
11.37
0.009.43
6.929.20
0.005.08
0.000.00
.750.00
.94
NON-OXIDATION NORM(fE2O3 CONVERTED TO FEO)
0.000.00
10.2714.57
31.84
.69
0.000.00
0.0012.00
0.000.00
24.730.00
0.005.14
0.000.00
.76
0.00
.64
Nl&GLl
SIAL
FMC
ALK
KMG
TIP
C/Frt
OZ
98
20.
50.
22.
6.
4.
-27*
3-COMPONENT
WT.PERCENTS
F 49.39
M 36.29
A 14.33
F 48.17
C 37.86
A 13.97
N 13.9H
K 12. <JK
C 73.04
No. 1099
REMARKS: See under 1097.
MINERALOGY: Very fine-grained rock. Phenocrysts:
Small augite, rare olivine. Groundmass: Flow-texture;
labradorite microlites in glass, abundant magnetite,
titanaugite.
No. 1100
REMARKS: See under 1097.
MINERALOGY: Phenocrysts: Abundant, small corroded
olivines. Groundmass: An72-78, titanaugite, olivine,
magnetite, no glass.
No. 1101
REMARKS: See under 1097.
MINERALOGY: Phenocrysts: Olivine, magnetite, small
plagioclase. Groundmass: Labradorite microlites in
glass, magnetite, augite, rare olivine.
OTHER INFORMATION: A basalt from this region
examined by Comucci (1933a) contains large andesine
phenocrysts which are zoned from An32 at the center
to An50 at the crystal boundary. A similar feature has
been observed in the Simien basalts. See also
Augustithis (1964).
1100
BASALT
L. DUPARC, 1930A
?. SLOPES OF MET I VALLEY, E. OF AMPO, SHOA
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
KZO
P2O5
H2O*
H2O-
C02
SO3
TOTAL
ANALYSIS
45.14
1.42
18.64
9.26
4.77
.14
5.e5
10.54
2.09
1.52
.40
.66
0.00o.oo
o.oo0,00
0,00
0.00
0,00
100.43
V.ATER-C02-FREE
(100.0)
45.24
1.42
IB.66
9.28
4.78
.14
5.86
10.56
2.09
1.52
.4U
SI
Tl
AL
Ft3
Ft2
MN
MG
CA
NA
K
P
H +
H-
Cs
ATOMS
WEIGHT
21.09
.65
9.86
6.4b
3.71
.11
3.53
7.53
1.55
1.26
.17
.01
0.00
0.00
0.00
ATOMSNUMBERS (100.0)
16.74
.40
8.15
2.59
1.48
.04
3.?4
4.19
1.50
.72
.13
0
CB
OH
AH
AN
NE
LC
AC
NS
DI
WO
HY
OL
FT
HI
IL
TI
RU
AC
CC
MGO/MGO*FcO
IN FLMICS =
WEIGHT f.OPM
(100.0)
0.00
0,00
9.02
17.76
37.04
0.00
0.00
0.00
0.00
10.21
0,00
8,37
1.07
11.7R
1.18
2.70
0.00
0.00
,fi8
0.00
1.00
NON-OXIDATIUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
9.18
13.25
37.71
2.61
0.00
0.00
0.00
11.18
0.00
0.00
22.42
0.00
0.00
2.75
0.00
0.00
.89
0.00
.4H
SI
AL
F"M
C
ALK
K
100
24.)
43.V
25.1
6.6
.32
3-COMPONENT
WT.PERCENTS
F 59.73
M 24.90
A 15.37
F 49.79
C 37.40
A I?.HI
N 14.77
K 10.74
C 74.49
1101
OLlVlME LASALl
09.01m 38.20t,
L. DUPAKCi 1930A
OF ADDIS ALtM, ShOA
St02
TI02
AL2O3
FF.2O3
FEO
MNO
MGu
CAU
NA20
K20
P2O5
H?0*
H20-
C02
S03
TOTAL
ANALYS1
46. (.9
1.80
14.88
10.09
6.73
0.00
5.63
a. 97
2.97
1.48
0.00
1.30
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.54
*ATER-C02-FkEE
(100.0)
47.05
1.81
14.99
10.17
6.78
0.00
5.67
9.04
2.99
1.49
0.00
SI
TI
AL
Ft3
Ft2
MN
Mb
CA
NA
K
P
H*
H-c
s
ATOMS
HEIGHT
21.81
1.08
7.87
7.06
5.23
0.00
3.40
6.41
2.20
1.23
0.00
.02
0.00
0.00
0.00
ATOMS
NOrtBEWS (100.0)
17.56
.51
6.59
2. 86
2.12
0.00
3.16
3.62
2.17
.71
0.00
0
CB
OR
AB
AN
NT
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGU/MCJO+FEO
IK FEHK.S =
WtlGHT NORM
( 100.0)
.19
0.00
B.H3
25.37
23.03
0.00
0.00
0.00
0.00
17.18
0.00
7.19
0.00
14.77
0.00
3.44
0.00
0.00
0.00
0.00
.95
NON-OXIDATION NOhM
(FE203 C0t4vEKTED TO FEO)
0.00
0.00
9.01
19.05
23.49
3.70
0.00
0.00
0.00
18.83
0.00
0.00
22.42
0.00
0.00
3.51
0.00
0.00
0.00
0.00
.43
SI
AL
FM
106
20.0
49.4
.25
? 39
3.1
0.00
.44
-29
3-COMPUNENT
WT.PERCENTS
F 62.53
M 20.93
A 16.54
F 55.62
C 29.66
A 14.72
N 22.13
K 11.03
C 66.84
1102
ANORTHOCLASt TRACHYTE
0R.15N 34.40E, ,'jEAR (j(*K[ELA, ILUBABUR
L. L'JPAkC, 1930K
SIU2
TI02
AL2O3
FE203
FEO
IwNU
MGO
CAO
NA2O
1C2U
P2O5
H2O*
H2O-
CO2
SO 3
TOTAL
ANALYSIS
63.17
? 32
10.01
1.C3
0.00
.06
.65
1.33
7.69
7.17
0.00
? 37
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.tO
17
1
0
1
7
7
0
.97
.83
.00
.06
.65
.33
.67
.15
.00
SITI
ALFL3
FL2MN
M6CA
NAK
PH*
H-C
s
ATOMS
?E1GHT
29.51
.19
9.53
1.28
0.00
.05
.39
.95
5.715.95
0.00
.00
0.000.00
0.00
ATOMS
NUMBERS (100.0)
21.94
.08
7.37
.48
0.00
.02
.34
.50
5.183.18
0.00
0
C"OR
A8AN
NELC
AC
MSDI
WOHY
OLKT
Hvi
IL
TI
PU
AP
CC
*r. IC-HT NOPM
(100.0)
(J.00
0.00
4?.39
3S.79
0.00
7.44
0.00
5.30
1.52
3.49
? 52
0.00
0.00
0.00
0.00
.13
.43
0.00
0.00
0.00
NON-OXIDATIUN NOF-M NIGGLl
(FE2O3 COUVFKTEO TO FEO)
0.00 si
0.00
42.53
41.38
0.00
6.13 t
0.00 f
0.00
2.93 f
5.55 (
\L"M
*LK.
1Gn
./FM
0.00 QZ0.00
.86
0.000.00
.61
0.000.00
0.000.00
238
40.
9.
5.
45.
0!
-28
3-COMPONENT
WT.PERCENTS
F 10.55
10.lh7.38
87.46
47.50
73.79
NO. 1102
REMARKS: See under 1097; P2?5 trace; no separate
determination of FeO.
MINERALOGY: Aphyric with flow-texture. Groundmass:
Very abundant anorthoclase, magnetite, rare zircon,
brown amphibole, aegirine(?), cossyrite(?), no glass.
OTHER INFORMATION: This rock forms numerous
small domes between the Baro River and the plateau.
No. 1103
MINERALOGY: No description by the author. Ground-
mass: Gaubert (1901) describes an assemblage of
nepheline, green pyroxene, apatite, magnetite and rare
divine.
No. 1104
MINERALOGY: Phenocrysts: Anorthoclase with glassy
inclusions, some Fe-rich olivine with pyroxene borders,
pale-green diopside with aegirine-augite borders.
Groundmass: Orthoclase microlites, diopside, olivine,
magnetite, rare quartz.
OTHER INFORMATION: This rock-type occurs between
green pantellerite (below) and obsidian (above).
1103
PHONOLlTf.
08.ION 35.3UL.
A. LACROIX, 193d
<,OfE HILLS, ILJ3AUJR
SI02
TI02
AL203
FE203
FEO
MMO
IMGU
CAO
NA2O
K2U
P2U5
H2O+
H2O-
CO2
S03
CL
-0
TOTAL
ANALYSI
58.22
.44
17.08
1.84
6.09
.07
.22
3.28
6.57
4.28
.21
1.32
.53
o.oo0.00
.13
o.oo0.00
-.03
100.25
17.38
1.87
6.20
.07
.22
3.34
6.68
4.35
.21
51
Tl
AL
Ft3
FE2
MN
MCJ
CA
NA
K
P
H +
H-
C
s
ATOMS
HtlGHT
27.20
.26
9.04
1.29
4.73
.05
.13
2.34
4.87
3.55
.09
.02
.01
0.00
0.00
ATOMS
NUMBERS
21.12
.12
7.30
.50
1.85
.02
.12
1.28
4.62
1.98
.06
Mf.O/MGG*FEU
IN FELMCS =
wElIiHT NOi'M
(100.0)
0.00
0.00
25.79
47.46
4.46
4.99
0.00
0.00
0.00
9.M
0.00
O.CO
3.64
2.72
0.00
.65
0.00
0.00
.47
0.00
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
0.00
0.00
25.89
45.47
4.48
6.18
0.00
0.00
0.00
9.67
0.00
0.00
6.9V
0.00
0.00
.85
0.00
0.00
.47
0.00
197
34.0
MG
TI
P
C/FlA
oz
.05
1.1
.30
.51
-27
3-COMPONENTWT.PERCENTS
F
M
A
F
C
A
N
K
c
41.74
1.16
57.11
35.95
14.87
49.18
46.50
30.29
23.2)
1104
OLlVlnE TkACHYTE
08.56N 39.56E. FAMAL1. SHOA
A. LACROlXi 1930
5102
TIU2
AL2O3
FE2O3
FEu
MNj
M30
CAu
NA20
< 2o
P2O5
H20*
H2U-
C02
SO3
TOTAL
02.70
? H2
13.42
3.36
6.37
.40
.11
3.06
5.79
3.28
.10
? fcl
? 33
0.00
0.00
0.00
0.00
0.00
0.00
100.35
WATER-C02-FKE.E
(100.0)
63.07
.82
13.50
3.3M
SI
TI
AL
Ft3
F?2
MN
ho
CA
NA
K
P
H-f
H-
C
s
ATOMS
HEIGHT
29.29
.49
7.10
2.35
4.95
.31
.07
2.19
4.30
2.72
.04
.01
.00
0.00
0.00
ATOMS
NUMBERS <IOO.O>
22.58
.22
5.70
.91
1.92
.12
.06
1.18
4.05
1.51
.03
KLlCjHT NORM
(100.0)
9.04
0.00
19. S5
49.40
NE
LC
AC
NS
D!
WO
HY
OL
KT
IL
TI
R'J
A^
CC
HGO/MGO-fFEO
IN FEl-ILS =
0.000.00
0.00
0.00
12. 2S
0.00
2?lh
0.00
4.91
0.00
1.57
0.00
0.00
.22
0.00
.04
NON-OXIDATION NORM
(I-E2O3 COUVEKTED TO FEO)
5.51
0.00
19.68
49.72
.88
0.00
0.00
0.00
0.00
12.39
0.00
10.03
0.00
0.00
0.00
1.58
0.00
0.00
.22
0.00
.02
SI
AL
FM
ALK
229
29
30
12
28
.0
. 1
.0
.3
3-COMPONENT
WT.PERCENTS
F 51.45
44.51
14.00
41.49
47.73
27.04
25.23
1105
SOLVSDERCITL
SIu2
TIU2
AL2O3
FF.2O3
FF.O
K'Nu
MGO
CAO
NA20
K?.U
P2O5
H20*
K2U-
C02
SOJ
TOTAL
uKK-.I'JAL
AijAi ySl-
64.42
.la14.54
1..34
1.5 3
0.00
.34
.52
a.03
<t.32
0.00
? 44
.38
0.00
o.no
o.co
0.00
0.00
0.00
100.04
nAT?R-C02-Fr<Et(100.0)
64.93
.16
14.65
5.3a
1.54
0.00
.34
.52
8.09
4.35
0.00
SITI
ALFt3
FE2
MN
Mo
CA
NA
K
PH*
H-c
s
ATOMb
wtlGHT
30.10
.11
7.69
3.73
1.19
0.00
.21
.37
5.96
3.59
0.00
.01
.00
0.00
0.00
ATGfcSNUMHERS (100.0
22.75
6
1
0
5
1
0
05
0 5
42
45
00
18
20
50
95
00
0
c.OR
Ar>
AN
NELC
AC
N5
CI
WO
HY
OL
MT
H-J
ILTI
RU
AP
CC
k>Llc-HT i*.Gf?i
(1OO.O)
Z.7R
0.00
Zi.fiO
51.10
0.00
0.00
0.00
ls.iie
0.00
2.?3
O.CO
2.?1
0.00
.OB
0.00
.34
0.00
0.00
0.00
0.00
NON-OxlDATION NORM
(FE2O3 CONvFKTED TO FEO)
5.19
0.00
26.07
51.63
0.00
0.00
0.00
0.00
4.13
2.32
0.00
10.31
0.00
0.00
0.00
.35
0.00
0.00
0.00
0.00
NlGGLl
SIAL
FM
C
ALK
KMG
TI
P
C/FM
OZ
252
33.6
22.H
Z.I41.4
.i.
.0
.5
0.0
.1
10
3-COMPONfcNT
WT.PEHCENTS
F 35.12
M 1.74
A 63.14
F 34.80
62.3933.57
4.04
No. 1105
MINERALOGY: Phenocrysts: Large anorthoclase, rare
albite. Groundmass: Anorthoclase, albite, rare quartz.
No. 1106
MINERALOGY: Phenocrysts: Anorthoclase, rare albite,
amphibole (laneite) and later aegirine. Groundmass:
Same as phenocrysts plus rare nepheline.
No. 1107
REMARKS: TiO2 trace.
MINERALOGY: Very fine-grained. Groundmass:
Anorthoclase, scarce aegirine and quartz.
1106
SOLVSdCRGlTE
09.28N 41.53E,
A. LACROlX. 1930
L.ALLA COL, E. OF KARSA, HARAKG(T
SI02
TIU2
AL203
FE203
FEU
MNO
M3O
CAO
NA20
K2O
P2O5
H2U+
H2U-
C02
SOS
TOTAL
65.14
0.00
is.eo
3.16
1.92
.26
0.00
.60
b.lP
4.54
0.00
.60
.16
0.00
0.00
0.00
0.00
0.00
0.00
100.36
V.ATER-C02-FKEE
(100.0)
65.40
0.0015.86
3.17
SI
Ti
AL
FL3
FE2
MM
Mo
CA
<
P
H+
H-
C
S
ATOMS
HEIGHT
30.43
0.00
8.36
2.21
1.49
.20
0.00
.43
6.07
3.77
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
22.HI
0.00
6.52
.A3
.56
.08
0.00
.73
5.56
2.03
0.00
R
R
H
N
E
C
C
S
I
3
Y
L
T
L
I
j
?j
IN FOlIC'i =
WEIGHT t.OKM
(1U0.0)
1.61
0.00
27.01
56.18
0.00
0.00
0.00
9.20
.71
2.67
0.00
2.61
0.00
0.00
0.00
0.00
0.00
0.00
o.no
0.00
0.00
NON-OXiDATlUN NORM
(KE2O3 COflVErtTEC TO FEO)
3.07
0.00
27.17
56.52
0.00
0.00
0.00
0.00
3.16
2.69
0.00
7.39
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SI
AL
FM
cAL<
K
MGTl
P
260
37.2
16. ?
2.6
43.4
.27
0.00
0.0
0.00
3-COMPONENT
WT.PEKCENTS
F 28.54
M 0.00
A 71.46
F 27.61
1107
LtUCOCRATlC SULV&LLRoITi
O9.2HH 41.53t, t,ALLA
A. LAtPOU, 1930
V+ <AKSA,
SIU2
TI02
AL<:03
FF203
FEO
MNO
MGU
CAy
NA20
K2U
P2O5
H20*
H2U-
ORICiI'iAL
A.vALYSU
67.0H
0.00
16.18
1.23
2.90
? 16
0.00
? 46
6.83
4.58
0.00
.79
.10
0.000.00
0.000.00
0.000.00
100.31
hATER-C02-FkLE
(100.0)
67.47
0.00
16.27
1.24
2.92
.16
ATOMS
WEIGHT
31.34
0.00
8.56
.86
2.25
.1?
0.00
.33
5.07
3.80
0.00
.01
.00
0.00
0.00
ATUMS
NUMhtRS (100.0)
23.44
0.00
6.66
.32
? R5
.05
0.00
.17
4.63
2.04
0.00
0
CH
OR
An
AM
NF.
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
R'J
AP
CC
MGU/MGO+FEO
1,1 FEKR5 =
rtCICjHT flOFK
(100.0)
7.10
0.00
27.30
5b.03
0.00
0.00
0.00
(1.00
2.05
0.00
3.61
0.00
1.69
0.00
0.00
0,00
0.00
0.00
0.00
0.00
NON-OXIUATION NORM
(FE203 COuVFKTEl) TO FEO)
5.92
0.00
27.36
58.17
0.00
0.00
0.00
0.00
.06
2.06
0.00
6.44
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
MG
TI
P
C/F11
07
0.00
0.0
0.00
.14
25
3-COMPONtNT
wT.PLRCENTS
F 26.5?
M 0.00
A 73.42
F 25.81
A. LACROIX. 1930
SI 02
TIO2
AL2O3
FE203
FEO
MNO
MGU
CAU
NA20
K2u
P2O5
H20 +
H2U-
cnzS03
TOTAL
OKIMilAL
67.30
.79
10.30
3.09
t>?9.3
.3
1.9
5.9
3.5
.1
I
.25
.16
0.00
0.00
0.00
0.00
0.00
0.00
100.13
?ATER-C02-FhihE
(100.0)
67.49
.79
10.33
3.1U
6.01
.32
.36
1.93
5.96
3.60
.12
SITl
ALFL3
Ft2MN
MGCA
NAK
PH +
h-
Cs
ATOMS
WEIGHT
31.44
.47
5.45
2.16
4.66
.25
.22
1.37
4.41
2.98
.05
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.01
4
1
4
1
.21
33
S3
79
10
19
73
11
64
04
Xi-t FEI'.ICb -
KLlChT MORI,
(100.0)
lb.22
0.00
21.33
33.05
0.00
0.00
0.00
B.99
1.69
7.K1
0.00
7.15
0.00
0.00
0.00
1.50
0.00
0.00
? 2fc
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
19.74
0.00
21.46
33.25
0.00
0.00
0.00
0.00
4.09
7.88
0.00
11.80
0.00
0.00
0.00
1.51
0.00
0.00
? 2b
0.00
h1GGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
276
24.9
33
8
33
2
5
5
1
2ft
07
4
21
25
68
3-C0MP0NENT
WT.PERCENTS
FM
A
FC
A
NK
C
O.I.
47.87
1.90
50.24
44.23
9.35
46.42
51.ttH
31.31?
16.77
96.14
No. 1108
MINERALOGY: Resembles solvsbergites 1105-7.
Phenocrysts: Anorthoclase, hedenbergite. Groundmass:
Anorthoclase, aegirine(?), quartz, cossyrite, glass,
Fe-rich olivine in some specimens.
No. 1109
REMARKS: No separate determination of f^O-; sub-
aluminous.
MINERALOGY: Groundmass: Glass, cossyrite,
hedenbergite, magnetite.
No. 1110
MINERALOGY: Resembles Karsa solvsbergites 1105-7.
Phenocrysts: Anorthoclase, Hedenbergite. Groundmass:
Anorthoclase, green pyroxene (aegirine?), quartz
cossyrite, glass, Fe-rich olivine in some specimens.
1109
PANTFLLERITIC CKSIl,lAN
09.00H 39.56E. N. SIUL FANTALI.
A. LACROIX. 1930
SI02
TI02
AL203
FF<:03
FEU
MNU
M3U
CAO
NA2O
K2O
P205
H20*
H2o-
CO2
SO3
CL
TOTAL
DKIGIMAL
ANALYSIS
69.06
.61
6.30
4.98
6.?6
.17
.27
.94
7.37
3.39
.07
.47
0.00
0.00
.47
.06
0.00
0.00
0.00
100.42
KATER-C02-FREE(100.0)
69.46.61
6.34
5.01
7.413.41
.07
SITI
AL
Ft3
FE2
HN
Mo
CA
NA
K
P
H?
H-c
s
ATOMS
*E16HT
32.26
.37
3.33
3.48
4.87
.13
.16
.67
5.47
2.81
.03
.01
0.00
0.00
? 19
ATOMS
NUMBERS (100.0)
24. BO
.16
2.67
1.35
1.88
.05
.14
.36
5.13
1.55
.02
IN FtMCS =
29.38
0.00
20.20
13.57
U.OO
0.00
0.00
14.53
7.64
3.79
0.00
9.58
0.00
0.00
0.00
1.16
0.00
0.00
.15
0.00
NON-OXIDATION NORM
(FE2O3 CONVFKTEP TO FEO)
31.95
0.0020.40
13.70
0.000.00
0.00
0.0011.59
3.84
0.0017.19
0.00
0.00
0.00
1.180.00
0.00.16
0.00
.05
SIAL
FM
C
ALK
292
15.7
40.5
4.3
39.5
3-C0MP0NENT
WT.PERCENTS
F
M
A
F
C
A
N
K.
50.47
1.21
4B.32
49.00
4.10
46.90
62.99
28.97
1110
POKPHYRITIC C.RANOPHYRE uENOLlTHS Ik PANTELLERITE)
08.56N 39.56L, FANTALI. SHOA
A. LACRJIX. 1930
SI02
TI02
AL2O3
FF2O3
FEu
MNO
MGU
CAO
NA20
K20
P?U5
H20*
H2U-
C02
S03
TOTAL
AnALYSl
69.P6
.52
11.41
3.4fl
3.3?
? 39
0.00
.92
5.72
4.22
0.00
.29
.07
0.00
0.00
0.00
o.oo0.00
0.00
100.?3
4.23
0.00
SITI
AL
FL3
FL2
MN
HO
CA
NA
K
P
H*
H-
C
S
ATOMS
WEIGHT
32.64
.31
6.04
2.43
2.60
.30
0.00
.66
4.24
3.50
U.OO
.00
.00
0.00
0.00
ATOMS
NlMBERS (100.0)
24.59
.14
4.73
.92
.99
.12
0.00
.35
3.91
1.90
0.00
0
CD
OR
AB
AM
NF
LC
AC
N5
01
WO
HY
OL
MT
H*l
IL
TI
R;J
AP
ccMGO/MGO+FfcO
IN FEl.ICS =
ULICHT LIO^M
(100.0)
20.26
0.00
25.04
35.?0
0.00
0.00
0.00
10.11
.44
4.09
0.00
3.P7
O.PO
0.00
0.00
.99
0.00
0.00
0,00
0,00
0,00
NON-OXIDATIUN NORM
(FE203 CONVERTEO TO FEO)
21.99
0.00
25.21
35.44
0.00
0.00
0.00
0.00
3.14
4.11
0.00
9.12
0.00
O.OC
0.00
1.00
0.00
0.00
0,00
0.00
0.00
SI
AL
FM
C
ALK
321
30.9
26.5
4.5
38.0
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
40.73
0.00
59.27
38.61
5.20
56.19
52.67
38. Bh
8.47
1111
P0RPHYR1TIC ObSHilAN (':LLL>EL' TUFM
08.561-1 39.55E, 5. SIj, FAN1AL1, SHOA
A. LACRO1X. 1930
SIU2
TI02
AL2O3
FE203
FEU
MNU
MGO
CAO
NA20
K20
P2U5
H20*
H?0-
C02
S03
TOTAL
OKl&INAl
70.52
.6.0
9.30
1.38
b.72
.24
0.00
1.92
5.98
4.C1
.06
.11
.14
0.00
0.00
0.00
0.00
0.00
0.00
10U.05
*ATER-C02-FKtE
70.71
.60
9.33
1.36
5.74
.24
0.00
1.93
6.00
4.02
.06
(100.0)
SI
Tl
AL
Ft3
Ft2
MN
Mtj
CA
NA
K
P
H*
H-
C
s
ATOMS
WEIGHT
32.95
.36
4.92
.97
4.45
.19
0.00
1.37
4.44
3.33
.03
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.96
.16
3.86
.37
1.70
.07
0.00
.73
4.11
l.fil
.02
HEIGHT NORM
(100.0)
2h.65
0.00
23.f3
25.54
0.00
0.00
0.00H.01
4.83
WA
IL
TI
RU
AP
ccMGO/vlGC-ft-LU
IN FEMICS =
O.CO
1.14
0.00
0.00
.13
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
27.35
0.00
23.89
25.61
0.00
0.00
0.00
0.00
5.91
8.25
0.00
7.72
0.00
0.00
0.00
1.150.00
0.00
.13
0.00
0.00
c
ALK
32125.0
27.5
9.4
38.1.41
0.002.1
.12
3-COMPONENT
WT.PtHCENTS
F 41.54
M 0.00
A 58.46
F 37.35
C 10.10
A 52.55
N 50.21K 33.67
C 16.12
NO. 1111
MINERALOGY: Phenocrysts: Alkali feldspar, corroded
quartz, brown amphibole, cossyrite, magnetite.
Groundmass: Glass, feldspar, pyroxene, and magnetite
microlites; bears fragments of porphyritic basalt, and
corroded isolated An30 xenocrysts.
No. 1112
MINERALOGY: Flow-texture. Phenocrysts: Abundant
aegirine-hedenbergite; cossyrite, anorthoclase, Fe-rich
olivine rimmed with hedenbergite. Groundmass: Glass,
with microlites of feldspar and green femics.
No. 1113
MINERALOGY: Phenocrysts: Hedenbergite-aegirine,
cossyrite, corroded quartz, sodic orthoclase.
Groundmass: Yellow glass, with pyroxene microlites.
OTHER INFORMATION: Occurs above rock 1104.
1112
AEGIK1NE. PAUTELLERITE (aELDEl, TUFF)
08.56N 39.55E. S. Sliit rANIAlI, SriOA
A. LACROIX. 1930
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K2U
P2O5
H2O*
H2O-
CO2
503
TOTAL
AUALYSI
70.7fc
.59
b.31
3.96
4.61
.220.00
1.5a
5.64
4.06
0.00
? 46
.23
0.00
0.00
0.00
0.00
0.00
0.00
100.42
*ATER-C02-FREE
(100.0)
70.95
4.07
0.00
SITl
ALFt3
Ft2MN
MGCA
NAK
P
H*H-
Cs
ATOMS
WEIGHT
33.06
.35
4.40
2.77
3.58
.17
0.00
1.13
4.18
3.37
0.00
.01
.00
0.00
0.00
ATOMSNUMBERS (100.0)
25.14
.16
3.4H
1.06
1.37
.07
0.00
.60
3.89
1.H4
0.00
WEIGHT ^OPM
(10C.0)
28.42
0.00
24.12
20.15
0.00
0.00
0.00
11.52
3.43
7.03
0.00
4.21
0.00
0.00
0.00
1.12
0.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
30.45
0.00
24.31
20.30
0.00
0.00
0.00
0.00
6.52
7.08
0.00
10.20
0.00
0.00
0.00
1.13
0.00
0.00
o.oo
0.00
0.00
SIAL
FM
cALK
KMG
TI
P
C/FM
OZ
326
22.6
32.4
7.H
37.2
? 3?
0.00
2.0
0.00
.24
121
3-CQKPONENT
WT.PERCENTS
F 46.91
M 0.00
A 53.09
F 43.17
50.00
35.99
14.01
1113
PANTELLERlTlC GliSIuIAN d-LCEhT FLOv.)
08.5fe)M 39.56E, S. SIL>L FAMTALI, SHOA
A. LACKOIX. 1930
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
503
TOTAL
OklflNAL
71.30
.61
7.42
U96
6.79
.36
0.00
.60
6.63
4.26
0.00
? 19
.03
0.00
0.00
0.00
0.00
0.00
0.00
100.15
4.26
0.00
SITI
AL
Ft3FE2
MN
Mlj
CA
NA
PH*
H-C
s
ATOMS
HEIGHT
33.31
.37
3.93
1.37
5.2B
.28
0.00
.43
4.92
3.54
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.30
.16
3.10
.52
2.02
.11
0.00
? ?3
4.56
1.93
0.00
WEIGHT NOBh
(100.0)
31. P2
U.OO
14.41
0.00
0.00
0.00
S.24
WO
HYOL
MT
HMIL
TI
R LI
AP
CC
MG0/MG0*FEO
IN FEM1C3 =
0.00
10.75
0.00
0.00
0.00
1.16o.oo
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
32.830.00
25.3614.46
0.00
0.000.00
0.00
9.782.67
0.00
13.73
0.00
0.00
0.001.16
0.000.00
0.000.00
0.00
SIAL
FMC
ALKK
MGTI
P
329
20.2
34.5
3.0
42.3
.30
0.00
2.1
0.00
3-COMPONENT
WT.PERCENTS
F 44.55
M 0.00
A 55.45
F 43.23
C 2.96
A 53.80
N 57.70
K 37.08
C 5.22
1114
AEGIR1NE PANTELLERITF
12.44N 43.0SE. DAhlTA,
A. LACROIX.* 1930
SIo2
T102
AL2O3
FE2O3
FEU
MNU
MGO
CAO
NA2O
K2O
P2U5
H2O*
H2O-
CO2
SO3
TOTAL
ANALYSIS
73.28
? 47
b.33
5.72
1.19
0.00
.35
.7?
4.34
4.03
0.00
1.37
.32
0.00
O.OO
0.00
0.00
0.00
o.no
100.12
^itR?C02~FKEE
(100.0)
4.45
.46
8.46
5.81
1.21
0.00
.36
.73
4.41
4.09
0.00
SITI
AL
FE3
FE2
MN
MCi
CA
N?
K
P
H*
H-
cs
ATOMS
HEIGHT
34.24
.28
4.41
4.00
.92
0.00
.21
.51
3.22
3.35
0.00
.02
.00
0.00
0.00
ATOMS
NUMBERS 1100.0)
26.04
3
1
0
2
1
0
13
49
53
35
00
19
27
99
R3
00
0
CB
01*
AS
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HI
ILTI
P.U
AO
CC
MGO/MGO+TLO
I,, FE.MCS =
KtlftHT NOKM
(100.0)
35.11
0.00
24.26
20.69
0.00
0.00
0.00
14.72
0.00
3.00
0.00
.23
0.00
1.07
0.00
.91
U.OO
0.00
0.00
0.00
.59
NON-OxlDATION NORM
(FE2O3 COUVEHTED TO FEO)
37.04
0.00
24.54
20.93
0.00
0.00
0.00
0.00
3.93
3.24
0.00
9.41
0.00
0.00
0.00
.92
0.00
0.00
0.00
o.oo
.10
SIAL
FM
cALK
<
MG
TI
P
C/FM
QZ
400
26.8
31.9
4.2
37.1
.3R
? 09
1.9
0.00
.13
182
3-COMPONENT
WT.pEROENTS
F 44.21
M 2.24
A 53.55
F 43.19C 4.50
A 52.31
N 47.74
K 44.33
NO. 1114
REMARKS: P2O5 trace.
MINERALOGY: None given.
No. 1115
MINERALOGY: Poor in femics, so not designated a
pantellerite.
No. 1116
REMARKS: MnO and CaO traces.
MINERALOGY: None given.
1115
COMENuITt
11.55.M 42.57E,
A. LACROIx. 1930
NT. -\k LA, AFAR AND IS5A
SI02
TIU2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
<20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
75.P6
? 39
9.75
2.00
1.98
.08
0.00
? K R
3.32
4.72
0.00
? El
.75
0.00
0.00
0.00
0.00
0.00
0.00
100.2*
?jATEK-C02-FRLE
(100.0)
2.01
.08
3.36
4.78
0.00
SITI
ALFt3
Ft2MN
MGCA
NAK
PH*
H-
CS
ATOMS
WEIGHT
35.44
.23
5.16
1.40
1.54
.06
0.00
.41
2.46
3.92
0.00
.01.01
o.oo0.00
ATOMS
NUMBERS (100.0)
26.66
.10
4.04
.53
.58
.02
0.00
.22
2.26
2.12
0.00
*1GO/MGO*FtO
let FLMCS =
WEIGHT NORM
(100.0)
3a.03
0.00
2B.35
24.15
0.00
0.00
0.00
3.1*8
0.00
2.61
0.00
l.?3
0.00
1.00
0.00
.75
0.00
0.00
U.OO
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
38.05
0.00
28.46
24.24
0.00
0.00
0.00
0.00
1.03
2.62
0.00
4.85
0.00
0.00
0.00
.75
0.00
0.00
0.00
0.00
ALFM
CALK
KMG
TI
P
C/FM
UZ
36.3
20.4
3? V
39.4
.4R
O.UO
1.4
0.00
.19
230
3-COMPONENT
WT.PERCENTS
F 33.11
M 0.00
A 66.89
F 31.59
C 4.60
A 63.81
N 3D.52
K 54.76
C 6.73
1116
AEGIK1NE PAKTELLERITE.
11.19N 42.55E. HOL-HOL* AFAH AND ISSA
A. LACRtJlX. 1930
SIU2
TI02
AL2O3
FF2O3
FEO
MNO
MGO
CAU
NA20
K?0
P2O5
H20*
H2U-
C02
503
TOTAL
OHltlNAL
ANALYSIS
78.72
.31
7.7H
4.39
1.31
0.00
0.00
0.00
4.24
3.03
0.00
.31
.22
0.00
O.PO
o.oo0.00
0.00
0.00
100.31
WATER-C02-FKEE
(100.0)
78.89
.31
7.80
4.40
1.310.00
0.00
0.00
4.253.04
0.00
SITl
AL
FL3FL2
MNMG
CA
NAK
PH*
H-c
s
ATOMS
WEIGHT
36. 78
.19
4.12
3.07
1.02
0.00
0.00
o.oo3.15
2.52
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
27.27
.08
3.18
1.15
.3R
0.00
0.00
0.00
2.85
1.34
0.00
cr
MGO/MCiO?(-tO
li. FEMII.S -
fctlf'HT NORh
(100.0)
44.68
0.00
1H.O0
23.IB
0.00
0.00
0.00
11.35
U.OO
U.OO
0.00
1.50
0.00
? 71
0.00
.59
O.OO
0.00
0.00
0.00
NON-OX IDAT ION NORM
(FE2O3 CONVF.KTEO TO FEO)
46.32
0.00
18.15
23.37
0.00
0.00
0.00
0.00
3.02
0.00
0.00
8.53
0.00
0.00
o.oo.60
0.00
0.00
0.00
0.00
40.2.32
0.001.5
0.000.00
291
3-COMPONENT
WT.PERCENTS
F 43.95
M 0.00
A 56.05
F 43.95
C 0.00
A 56.05
N 58.32K 41.6H
C 0.00
09.02H 38.4iE. ST. !,F.bk,,L CHUhCri, ADDIS ALABA, SHOA
H.P.T. ROHLEDEK AND C.5. HITCHES, 1930
SIU2
TI02
AL203
FE2O3
FFO
MNU
MGU
CAU
NA20
PC20
P2O5
H2O +
H2U-
C02
S03
SBrtO
V1O3
TOTAL
ANALY'ilb
4*1.59
2.1ft
14.23
3.33
9.33
.20
B.72
10.96
2.17
.72
.42
1.82
.60
0.00
0.00
.01
.02
.05
0.00
100.33
?ATtR-C02-FKEE
(100.0)
46.60
2.21
14.55
3.40
9.54
.20
8.91
11.20
2.22
.74
.43
SITI
AL
Ft3
Ft2
MN
MC>
CA
NA
KP
H+
H-
Cs
ATOMS
WEIGHT
21.30
1.29
7.53
2.33
7.25
.15
5.26
7.83
1.61
.60
.18
.02
.01
0.00
0.00
ATOMS
NUiiHERS (100.0
17.24
6
2
4
4
1
61
3
9
9
0
9
4'
?
}
1
0
CR
OR
AB
AN
NE
LC
AC
NS
DI
teO
HY
OL
MT
H?i
ILTI
RU
APCC
MGO/MGO+FEO
In HEMICS =
WL1CHT NOPM
(100.0)
0.00
0.00
4.36
18.80
27.53
0.00
o.co0.00
0.00
20. 7R
0.00
4.62
13.64
4.95
0.00
4.19
0.00
0.00
.94
0.00
.72
NON-OXIDATIGN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.39
17.89
27.71
.56
0.00
0.00
0.00
21.25
0.00
0.00
23.04
0.00
0.00
4.22
0.00
0.00
.94
0.00
.60
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 52.16
H 35.93
A 11.91
F 47.76
C 41.34
A 10.90
N 15.67K 5.20
C 79.13
No. 1117
MINERALOGY: Phenocrysts: Serpentinised olivine.
Groundmass: Plagioclase, augite, magnetite, olivine(?).
No. 1118
REMARKS: No separate determination of FeO. The
nature of this rock is puzzling, and the presence of
native carbon suggests contamination.
MINERALOGY: Not given.
No. 1119
MINERALOGY: None given.
1118
ROCK FROM LARGE BLISTERS 1,'J itELDED TJFF
OR.55N 39.55E, N.bj. OK METAHARA. SHOA
H.R.T. ROhLEDEK AND C.b. H1TCHEM, 1930
5102
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P205
H20+
H20-
C02
S03
Bfto
Cl_
C
-0
T01AL
ORIGINALANALYSIS
SI.11
.50
10.03
6.99
0.00
.24
1.25
6.36
5.20
6.19
.13
2.83
1.07
5.28
1.P2
.05
.19
1.19
-.04
100.39
WATER-C02-FREE
(100.0)
58.08
.57
11.40
7.94
0.00
.27
1.42
7.23
5.91
7.03
.15
SITI
AL
Ft3
FE2
MM
Mb
CA
NA
K
P
ATOMS
WEIGHT
23.88
.30
5.31
4.89
0.00
.19
.75
4.55
3.86
5.14
.06
ATOKS
NUMBERS (100.0)
21.08
.16
4.R7
2.17
0.00
.08
.77
2.81
4.16
3.26
.05
MGU/MGGtFLO
IN FEhlCS =
.41
HEIGHT MOF'M
(100.0)
2.90
0.00
39.30
IB.27
0.00
0.00
0.00
21.73
1.01
0.00
0.00
3.34
0.00
0.00
0.00
.55
0.00
.25
.30
11.90
.41NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO]
6.57
o.oo39.87
18.54
0.00
0.00
0.00
0.00
6.85
0.00
0.00
14.31
0.00
0.00
0.00
1.03
0.00
0.00
.31
12.07
175
20.3
3-COMPONENT
wT.PERCENTS
F 35.61
28.2525.71
46.04
79.30
34.87
35. R3
1119
ALKALI TRAChYTt
09.02H 38.47E, .iRITIbri U-.ASS,, ADDIS AEAF-.A,
H.P.T. RUHLEDEk AND C.5. HITCHEN. 1930
SI02
TIU2
AL2O3
FE2O3
FEO
MNO
MGU
CAO
NA20
K20
P2U5
H20*
H2U-
COi
S03
SPflO
V203
TOTAL
UKIr,INA(.
ANALYSIS
63.13
1.14
15.72
2.50
1.77
.21
.81
1.72
4.55
4.09
.26
3.03
1.00
0.00
0.00
.01
.11
.01
0.00
100.06
WATER-C02-FKEE
(100.0)
65.83
1.1916.39
2.61
1.85.22
.841.79
4.74
SITI
AL
FE3
Ft2
MM
MC)
CA
NA
<
P
H+
H-
C
s
ATOMS
WEIGHT
29.49
.63
8.32
1.75
1.38
.16
.49
1.23
3.38
3.40
.11
.04
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
23.00
.31
6.75
.69
.54
.06
.44
.67
3.22
1.90
.08
HEIGHT NOf;M
(100.0)
17.32
1.26
25.27
40.25
7.32
0.00
o.oo0.00
0.00
0.00
0.00
2.11
0.00
3.24
.38
2.26
0.00
0.00
NON-OXIDATION NORM
^E203 CONVEKTEO TO FEO)
14.78
1.27
25.40
40.45
7.36
0.00
0.00
0.00
0.00
0.00
0.00
7.8K
0.00
0.00
0.00
2.27
0.00
0.00
SIAL
FM
C
ALK
275
40.4
20. H
8.1
30.7
C/TM
01
3-COMPONENT
WT.PERCENTS
F 31.12
M 5.90
A 62.97
F 29.19
C 11.76
A 59.06
N 43.92
K 39.4ft
C 16.60
CC
MGO/HGO+HEO
IN FEMCS =
1120
PANTELLEKITL
08.55N 39.55E, LiETfciEt
H.P.T. ROHLEDtN AND C.5.
f'ANTALI AND METAHARA
HITCHEN, 1930
SIu2
TI02
AL2O3
FE2O3
FEO
MNU
WGU
CAu
NA20
K20
P2O5
H20 +
H20-
C02
S03
BflO
CL
TOTAl
ORIGI'JAL
ANALYSIS
6b.69
? 40
9.98
0.52
.f,8
.14
.03
.76
5.P4
4.23
.07
.?0
.04
0.00
.10
.06
.02
0.00
0.00
99.76
fcATER-C02-FREE(100.0)
69.15
.40
10.058.58
.68
.14
.03
.77
5.884.26
.07
SITI
AL.
FE3
FE2MN
MCJ
CANA
KP
ATOMS
HEIGHT
32.09
.24
5.28
5.96
.53
.11
.02
.54
4.33
3.51
.03
ATUMS
NUhBEHS (100.0
24.44
4
2
4
1
11
19
29
20
04
02
29
03
92
02
0
CflOR
A?
ANNE
LCAC
NS
DIWO
HYOL
MT
ILTI
Rl.l
A?
ccMGU/MGO-ff CO
IJ^FtMCS =
wtlGHT NC^M(100.0)
22.720.00
25.?3
27.92
0.00O.CO
0.00ly.33
0.00
.16
1.33
0.000.00
1.51
? e.R
.76
0.000.00
.1?
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)24.45
0.0025.65
28.39
0.000.00
0.000.00
5.19
3.070.00
12.310.00
0.000.00
.78
0.000.00
.16
0.00
.01
SIAL
FMC
ALK
309
26
32
3
37
C/FM
OZ
3-COMPONtNT
HT.PERCENTS
F 47.67
53.9239.06
7.0?
No. 1120
MINERALOGY: Flow-texture. Phenocrysts:
Anorthoclase, quartz, aegirine-augite, cossyrite,
riebeckite. Groundmass: Glass.
No. 1121
MINERALOGY: Flow-texture. Phenocrysts: Anortho-
clase, quartz, aegirine-augite, cossyrite, riebeckite.
Groundmass: Glass.
No. 1122
MINERALOGY: None given.
1121
PANTFLLERITE
08.59N 39.54E, ON CONi OF FANTAl. I, SHOA
H.P.T. ROhLLDEk AND C.S. HITCHEM, 1930
SI02
TI02
AL2O3
FE<!03
FEO
MNJ
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
cotS03
S
BUO
OKIOINAL
ANALYSIS
70.99
.38
9.18
3.15
4.67
.25
.19
.71
6.07
4.24
.28
? ?2
.02
0.00
0.00
.01
.01
0.00
WATER-C02-FREE
(100.0)
70.91
.38
9.17
3.15
4.66
.25
.19
.71
6.06
4.2'.
.28
51
Tl
ALFE3
F12
MN
ho
CA
NA
KP
Hf
H-
C
5
ATOMS
*EIGHT
33.17
.23
4.86
2.20
3.63
.19
.11
.51
4.50
3.52
.12
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.01
25.00
3
1
4
1
10
81
84
38
07
10
27
15
91
08
0
OR
AR
AN
NELC
AC
NSDI
WO
HY
OLMT
|-|M
ILTI
RLI
AP
CC
MGO/MCiO*/E0
IN FEMICS =
WtlGHT NORh
(100.0)
27.13
0.00
25.10
23.54
0.00
0.00
0.00
9.13
4.08
1.66
0.00
a.02
0.00
0.00
0.00
.72
0.00
0.00
.61
0.00
.07
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
28.73
0.00
25.25
23.69
0.00
0.00
0.00
0.00
6.53
1.68
0.00
12.78
0.00
0.00
0.00
.73
0.00
0.00
.62
0.00
.05
329
25.
3-COMPONtNT
wT.PERCENTS
F 42.69
M 1.04
A 56.2R
F 41.51
55.0838.48
6.44
1122
PANTELLEHlTfc
O9.O3H 38.46E, GE
H.P.T. ROHLEDER AND
MA.N EhbASSy,
.S. H1TCHF.N,
ADDIS ABAbA,
1930
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA^O
K20
P205
H20*
H2O-
S03
S
ATER-C02-FREE
(100.0)
2.85
.42
1.10
3.95
2.42
.09
.28
.39
3.98
4.38
.15
SITl
ALFE3
FE2
MN
MO
CA
NA
<
P
ATOMS
WEIGHT
33.34
5
2
1
2
3
25
75
71
84
07
16
27
89
56
07
ATUMS
NlMHfcHS (100.0
25.46
4
1
2
1
11
57
04
71
03
14
15
70
95
05
0
CR
OR
AnAN
NF.
LCAC
NSDI
WO
HY
OL
MT
HM
ILTI
PU
AD
CC
?IGO/MG0?FfcO
IN FEMILS =
KtlGHT KOftH
(100.0)
31.97
0.00
2!>.</5
32.65
0.00
0.00
0.00
.99
0.00
.86
0.00
1.20
0.00
5.25
0.00
.79
0.00
0.00
.34
0.00
.49
NON-OX I DAT I ON NORM
OE2O3 CONVERTED TO FEO)
28.53
0.00
26.15
32.90
0.00
0.00
0.00
0.00
.26
.91
0.00
10.11
0.00
0.00
0.00
.80
0.00
0.00
.34
0.00
.08
SIAL
FM
C
ALK
K
MG
TI
P
C/FM
381
34.
28.
2.
34.
1.
3-COHPONENT
WT.PEHCENTS
F 42.45
M 1.84
A 55.71
F 42.13
45.51
50.06
4.43
1123
PANTELLLHITIC UhSIpl
08.36N 39.08E( HO
H.P.T. MOHLLDLH AND
SHOA
HITC-HEN, 1930
SI02
TIU2
AL203
FE2O3
FEU
MNu
MGO
CAU
NA2O
K2U
P2U5
H2O-*
H2U-
C02SO3
s
TOTAL
ANAL YSI
71.63
.36
11.31
2.4 1
3.56
.20
.02
.41
b.f. 1
4.56
.07
.250.00
0.000.00
.01
0.000.00
0.00100.40
NATER-C02-FKEE(100.0)
SITl
ALFL3
FE2MN
MO.C?
NAK
P
Ht
H-c
s
33.47
.22
5.98
1.69
2.77
.15
.01
.29
4.16
3.79
.03
.00
0.00
0.00
0.00
ATOfcS
NUrtBEHS (100.0)
25.02
1.04.06
.01.15
3.802.03
.02
0
C1!
09
A1AN
NE
LC
AC
NSDI
WO
HY
OL
I*!T
HM
IL
TI
RU
An
CC
.VL'CIHT r-.O^M
(100.0)
23. M4
0.00
26.99
32.70
0.00
0.00
0.00
b.98
l.f 1
1.45
0.00
'j.f-0
0.000.00
0.00
.ftfi
0.00
0.00
.15
0.00
NON-OXIDATION NORM
(FE2O3 COrivFhlTED TO FEO)
25.05
0.00
27.11
32.85
0.00
0.00
0.00
0.00
3.47
1.4b
0.00
9.23
0.00
0.00
0.00
.69
0.00
0.00
.15
0.00
3-COMPONENT
WT.PERCENTS
F 36.94
36.072.48
61. 4")
53.0243.10
3.A8
No. 1123
REMARKS: No separate determination of H^O-.
MINERALOGY: None given.
No. 1124
REMARKS: No separate determination of H_O-.
MINERALOGY: None given.
No. 1125
REMARKS: High-alumina basalt.
MINERALOGY: Dark, dense rock. Phenocrysts: Rare
An50, olivine. Groundmass: An50, olivine, augite,
rare magnetite and glass.
1124PANTELLEMTl
O9.OIH 38.46E, NEAR JuBILEt PALACE, ADDIS ABABA,H.P.T. ROHLEDER AND C.S. H1TCHEN, 1930
SI02
TI02
AL2O3
FE2O3
FEO
MMU
Mf,0
CAO
NA2O
K?O
P205
H2Q+
H2O-
C02
S03
TOTAL
ANALYSIS
71.91
.41
11.44
2.67
2.76
.14
.IS
.21
4.38
4.63
.04
1.18
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.95
WATER-C02-FREE(100.0)
72.81.42
11.582.70
2.79.14
.IB
.214.43
4.69
SITI
AL
Ft3
FL2
MN
Mb
CA
NA
K
P
H*
H-
Cs
ATOMSHEIGHT
33.60
.25
6.051.87
2.15
.11
.11
.15
3.253.84
.02
.01
0.000.00
0.00
ATOMSNUMBERS (100.0)
25.39
.11
4.76
.71
.82
.04
.09
.08
3.002.09
.01
CC
MGO/MGO+FF.U
In FEl-'ICS =
WEIGHT NOPN':
(100.0)
27.80
0.00
27.78
33.44
0.00
CJ.OO
0.00
3.69
0.00
.72
0.00
3.62
0.00
2.08
0.00
.79
0.00
0.00
? 09
0.00
NON-OX I DAT I ON NORM
(FEZ03 CONVFKTEO TO FEO)
27.00
0.00
27.93
33.61
0.00
0.00
0.00
0.00
.9H
.73
0.00
8.87
0.00
0.00
0.00
.79
0.00
0.00
.09
0.00
C/FU
3-C0MP0NENTWT.PEHCENTS
F 37.14
37.061.43
61.50
47.5150.22
1125OLlVlNE uASAlT
09.02.J 3S.46E,P. COMUCCI, 1432
SIU2
TI02AL2O3
FE2O3FEU
MNU
MGO
CAuNA20
K20P2O5
H20*
H20-COZ
S03
47.33
.7922.17
.40
7.88.16
7.72
9.74
2.611.20
0.00
SITI
AL
FL3
FE2
MN
Mli
CA
NA
<
P
Ht
H-
cs
ATOMS?EICHT
21.80
.47
11.57
.27
6.04
.12
4.596.86
1.91
.98
0.00
.01
.01
0.00
0.00
ATUhSNUMBERS (100.0)
17.&7
.21
9.42
.11
2.38
.05
4.163.76
1.R2
? 55
0.00
O.CO
0.000.00
R
M
E
S
I
i
r
i.j
IK FEMICS =
HEIGHT NORM
( 100.0)
O.CO
0.00
7.09
18.07
45.24
2.18
0.00
0.00
0.00
2.60
0.00
0.00
22.74
.57
o.no1.50
0.000.00
0.000.00
.66
NON-OXIDATION HORM(FE2O3 CONVERTED TO FEO)
0.000.00
7.0917.63
45.27
2.430.00
0.000.00
2.61o.oo
o.oo23.46
0.000.00
1.500.00
0.000.00
0.00
.64
SIAL
FM
C
ALtC
104
28. tt
40.9
23. U
7.3
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
41.80
38.99
19.21
37.94
44.63
17.43
19.25
8.84
1126
ANORTHOCLASL TRAChYTL
08.58N 3(J.46F? bKV
P. COMUCCI, 1932
OF ADDIS ABABA (OUAKRY bY KAILwAY)
SIU2
TIU2
AL2O3
FF2O3
FEO
MNU
MSO
CAO
NA2O
K2U
P2O5
H2O +
H2U-
CO<!
503
TOTAL
URICIKAL
ANALYSIS
61.78
1.10
13.23
7.<?8
0.00
.12
.76
3.1ft
4.27
4.39
0.00
1.76
1.70
0.00
0.00
0.00
o.oo0.00
0.00100.27
l?AT?R-C02-FKfcE
63.821.14
13.678.24
0.00.12
.79
3.284.41
4.530.00
(100.0)
SI
Tl
AL
FE3
FE2
MN
MG
CA
NA
K
P
Ht
H-
C
s
0
ATOMS
HEIGHT
28.66
.66
7.005.58
0.00.09
.46
2.273.17
3.640.00
.02
.02
0.000.00
48.49
ATOMS
NUMBERS (100.0)
22.70
.30
5.732.21
0.00.04
.42
1.253.04
2.060.00
62.25
WEIGHT NORM
(100.0)
15.?2
0.00
26.87
37.41
4.03
0.00
IL
TI
R'J
Ai">
cc
MGO/MGO+l-tO
IH F?MC3 =
.71
1.70
U.OO
O.CO
0.00
1.00
NON-OXIUATION NOPM
(FE203 CONVERTED TO FEO)
10.39
0.00
27.30
38.014.09
0.000.00
0.00
0.00
10.88
0.00
7.15
0.00
0.00
0.00
2.19
0.00
0.00
0.00
0.00
.19
C/FM
oz
243
30.7
28.5
13.4
27.4
.40
.16
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
45.864.37
49.77
40.26
16.0443.69
36.06
37.0626.B6
No. 1126
REMARKS: FeO trace.
MINERALOGY: Flow-texture. Groundmass: Brown
glass,"? abundant anorthoclase/sanidine, sometimes as
corroded micro-phenocrysts ; magnetite, ilmenite(?);
very rare plagioclase; no femics, no quartz.
OTHER INFORMATION: A yellow-brown rock of
localised occurrence.
No. 1127
REMARKS: High water-content due to weathered nature
of rock.
MINERALOGY: Flow-texture. Phenocrysts: Anortho-
clase, rare quartz. Groundmass: Glass, anorthoclase;
rare brown hornblende, altered augite; fragments of
basalt, glass; cavities filled with yellow earthy
material.
OTHER INFORMATION: Used in building construction in
Addis Ababa.
No. 1128
MINERALOGY: Flow texture. Phenocrysts: Sanidine.
Groundmass: Glass, abundant sanidine, rare quartz,
no femics.
OTHER INFORMATION: A similar rock from km 5
along the railway is richer in quartz.
REMARKS: MgO trace.
1127
ANORTHOCLASL. TRACHYTE (ULLriFO TUFF) (LEATHERED)
09.01N 38.45E, ADDIS /*HAp,A, SHUA
P. COMUCCI, 1932
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2U5
H2O*
H2U-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
62.68
.99
13.44
5.25
1.00
.15
? 46
2.72
3.C6
4.43
0.00
4.00
2.30
0.00
0.00
0.00
0.00
0.00
0.00
100.48
*ATER-C02-FKEE
(100.0)
66.55
1.05
14.27
5.57
1.06
.16
.49
SITl
ALFE3
FL2MN
MiCA
NAK
P
H'f
H-C
s
ATOMS
WEIGHT
29.28
.59
7.11
3.67
.78
.12
.28
1.94
2.27
3.68
0.00
.05
.03
0.00
0.00
ATOMSNUMBERS (100.0)
23.52
.28
5.94
1.49
.31
.05
.26
1.09
2.23
2.12
0.00
MGO/MGO-fFt'O
IN FfcMCS =
ktlGHT NORM
(100.0)
23.42
0.00
27.87
27.56
10.41
0.00
0.00
0.00
0.00
2.63
.24
0.00
0.00
.91
4.96
2.00
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
19.61
0.00
28.17
27.86
10.52
0.00
0.00
0.00
0.00
3.50
0.00
8.32
0.00
0.00
0.00
2.02
0.00
0.00
0.00
0.00
C/FM
OZ
3-COMPONENT
WT.PERCfcNTS
F 44.01
37
16
45
29
43
26
.97
.52
.50
.97
.39
.64
1128
COMENuiITIf wELDED
08.58N 38.46E.
P. COMUCCI, 193Z
TUFF
OKI. 5 OF ADDIS ABA9A (QUAKRY bY RAILWAY)
SI02
TI02
AL203
FE2O3
FEO
MNU
MGO
CAO
NA20
tf ?0
P2U5
H20*
H20-
COi
S03
TOTAL
OKICJMAL
ANALYSIS
71.78
.66
10.29
4.43
1.67
.210.00
1.02
3.70
5.37
0.00
.70
. fib
0.00
0.00
0.00
0.00
0.00
0.00
100.69
WATER-C02-FHEE
(100.0)
3.73
5.42
0.00
SITl
AL
FE3Ft2
MNMb
CA
NAK
PH*
H-C
S
ATOMS
HEIGHT
33.54
.40
5.44
3.10
1.30
.16
0.00
.73
2.75
4.46
0.00
.01
.01
0.00
0.00
ATOMS
NUMHtRS (100.0)
25.44
.18
4.30
1.18
.50
.06
0.00
.39
2.54
2.43
0.00
HEIGHT NORN,
(100.0)
30.26
0.00
32.10
23.17
0.00
0.00
0.00
7.48
0.00
1.56
1.41
0.00
0.00
2.75
O.DO
1.26
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
29.69
0.00
32.38
23.37
0.00
0.00
0.00
0.00
1.99
4.60
0.00
6.69
0.00
0.00
0.00
1.28o.oo
0.00
0.00
0.00
SIAL
FM
CALK
KMG
Tl
P
C/FM
OZ
37531.7
25.7
5.736.8
.49
0.00
2.6
0.00
.22
143
3-COMPONFNT
WT.PERCENTS
F 40.21
37. 68
6.30
56.07
36.6753.22
10.11
IU FtMCS = 0.00
07.00i< 39.10L, HEAR ,)U>OLA, ARUSS1
E. REP0S51. 1932
SI02
TI02
AL2O3
FE2O3
FFJ
WNO
MGO
CAO
NA2O
K2O
P?O5
H2U*
H2O-
CO2
SO3
TOTAL
^l< 111 |AL
ANALYSIS
4b.50
2.?8
14.'.2
4.P2
4.03
.14
5.f,5
12.24
3.44
2.M
.tz
2.44
1.04
1.16
0.000.00
0.00
0.00
0.00
100.59
hATEK?
47.42
2.38
15.03
5.02
4.20
.15
5.89
12.76
3.592.93
.65
C02?FKEE(100.0)
51
TI
AL
FE3
Ft2
MN
Mlj
CA
NAK
P
Hf
H-
Cs
0
ATOMS?EIGHT
21.26
1.37
7.63
3.37
3.13
.11
3.41
8.75
2.552.33
.27
.03
.01
.32
0.00
46.05
ATOMSNUC.HERS (100.0)
17.45
.66
6.52
1.39
1.30
.05
3.74
5.03
2.561.3R
.20
60.73
0
CMOR
AB
AN
NE
LCAC
NS
DI
WO
HY
OL
MT
IL
TI
PU
AP
CC
MGU/Mt.O*f EO
I IX S =
V.L1CHT NORM(100.0)
0.00
U.0017.13
13.33
16.01
9.05
0.000.00
0.00
27.49
o.no
0.00
1.24
7.07
.10
4.45
0.00
0.00
1.40
<;.72
1.00
NON-OXIDATION NORM
(ht2O3 CONVEKTED TO FEO)
0.00
o.oo17.30
7.72
16.17
12.24
0.000.00
0.00
29.27
0.00
0.00
8.65
0.00
0.004.50
0.00
0.00
1.41
2.75
.63
N1GGLI
51
ALFM
C
ALK
K
M6TI
P
C/FM
QZ
107
20.1
36. 8
31. 0
12.1
.-i
.5
4.0
.6
.8
-41
3-COMPONENT
HT.PtRCENTS
F 42.6
M 27.2
A 30.1
F 32.3
C 44.7
A 22.8
N 18.60
K 15.20
C 66.70
No. 1129
REMARKS: Cl trace.
MINERALOGY: Phenocrysts: Corroded aegirine-augite,
less common brown hornblende. Groundmass: Micro-
lites of pyroxene, feldspar/nepheline, and of sodalite(?),
common magnetite; rare vesicles contain natrolite and
calcite.
OTHER INFORMATION: A similar rock from between
Guri and Mio contains pyroxene phenocrysts zoned from
titanaugite to aegirine-augite; also serpentinised olivine
phenocrysts.
No. 1130
MINERALOGY: Groundmass: Abundant zoned labradorite,
common serpentinised olivine (occasionally as pheno-
crysts), abundant magnetite, rare ilmenite, rare brown
hornblende and biotite.
OTHER INFORMATION: An identical rock occurs in the
Wosho Valley north of Bokoji. Basalt from the Katar
headwaters, north of the Sella di Karra, contains
abundant iddingsitised olivine phenocrysts in a glassy
groundmass.
No. 1131
REMARKS: Weathering shows in water and carbon
dioxide contents Cl trace.
MINERALOGY: Phenocrysts: Uncommon small altered
nepheline, abundant zoned pyroxene (augite out to
aegirine), barkevikite with rims of aegirine-augite.
Groundmass: Nepheline, aegirine-augite, apatite,
titanite rare biotite, sodalite(?); vesicles contain
natrolite-scolecite, calcite.
1130
DOLERITIC BASALT
07.30N 39.16t.
E. RFP0SS1, 1932
hULULLl, S. OF 15OKOJI. ARUSS1
SIU2
TIO2
AL2O3
FE2O3
FFU
MNO
N'GO
CAO
NA2O
K2U
P2U5
H20 +
H2u-
CO2
S03
TOTAL
OKIKINAL
ANALYSIS
46.99
2.68
18.07
3.21
9.32
.21
5.13
B.'-O
3.91
1.04
.53
? 53
.25
0.00
0.00
0.00
O.OO
0.00
0.00
100.37
WATER-CO2-FRI1E
(100.0)
18.14
3.22
9.36
.21
5.15
8.53
3.93
SI
Tl
ALFL3
Ft2
MN
MG
CA
NAK
P
H +
H-c
s
ATOMS
*fcIGHT
21.95
1.61
9.56
2.25
7.24
.16
3.09
6.07
2.90
.66
.23
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.34
.74
7.86
.89
2.88
.07
2.83
3.36
2.HO
.49
.17
Q
C1
OR
A^iAN
NE
LC
AC
N5
CI
HY
OL
MTHI
1L
TIRU
A?CC
MG0/MG0*f-LO
IK Ft I'; K b  =
WE.I&HT KOF.-N
(100.0)
0.00
0.00
6.1H
29.27
2b.76
2.17
0.00
0.00
0.00
ii.66
0.00
0.00
13.99
4.6R
0.00
5.11
0.00
0.00
1.16
0.00
.62
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.22
25.72
28.93
4.21
0.00
0.00
0.00
8.88
0.00
0.00
19.73
0.00
0.00
5.14
0.00
0.00
1.17
0.00
.4H
111
25.
3-COMPONENT
wT.PERCENTS
F 55.4?
PI 22.69
A 21.89
F 48.23
C 32.72A 19.05
N 29.07K
 7.73C 63.20
TI.NGUAITE (nEAI.itKLD SLl.l.TLf)
07.30IN| 40.40E, uETnELP: ,',IJ(-L ANLI MIO,
?. REPObSI, 1932
OF SULK: HUSShIN, ARUSSI
SI02
TI02
AL2O3
FF.2O3
FFO
MNO
MGOCAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
47.43
.44
16.83
5.40
4.31
.25
1.76
6.31
7.11
3.00
.66
4.48
1.21
.42
0.00
0.00
0.00
U.00
U.00
99.61
wAT!?k-C02-FH?E
50
18
5
(100.0)
.73
.47
.00
.78
7.60
3.21
SI
TI
AL
FL3
Ft2
MN
MG
CA
NAK
ATOMS
WEIGHT
22.16
.26
8.90
3.78
3.35
.19
1.06
4.51
5.27
2.49
ATOMS
NUMHERS (100.0)
18.38
.13
7.69
1.58
1.40
.08
1.02
2.62
5.35
1.4H
.11
0.00
0
C'3
OR
AT
ANNE
LC
AC
NS
DI
WOHY
OLMT
HM
IL
TI
RU
AP
CC
MGO/MGOtFEO
IN FEhlCS =
?ElCHT r.OKM
(100.0)
0.00
0.00
IB.92
26.74
5.39
20.28
0.00
0.00
0.00
16.50
.37
0.00
0.00
9.35
0.00
.69
0.00
0.00
1.54
1.02
.64
NON-OX I DAT I ON NORM
(FE2O3 CONVEkTED TO FEO)
0.00
0.00
19.13
20.13
5.45
24.25
0.00
0.00
0.00
18.33
0.00
0.00
9.24
0.00
0.00
.90
0.00
0.00
1.55
1.03
.27
ALKK
MG
TIP
C/FM
OZ
24.5
.22
.25
.9
.78
.64
-67
3-COMPONENT
WT.PtRCENTS
F 45.00
M 8.16
A 46.85
F 37.16
C 24.15A 38.69
N 43.30
K 18.27C 38.43
1132
TINGUAITE nNEPHEL
07.05N 39.42E.
F. REPOSSI, 1932
MT. LAjO, ?. OF CiOuA, ARuSSI
SIO2
TIO2
AL203
FE2O3
FEU
MNu
MGO
CAO
NA2O
If 20
P2O5
H20 +
H2U-
C02
503
TOTAL
0a
OR
AR
AN
NE
LC
AC
NS
DI
WO
HY
OL
<?T
H*l
IL
TI
R:|
AP
ccMGu/MGO+FLU
If* FF-MICS =
ORIGINAL
ANALYSIS
S0?i9
.<>6
20.18
2.49
2.16
? 15
.73
2.23
9.34
4.77
.20
4.94
1.23
.33
0.00
0.00
0.00
0.00
0.00
99.90
?El&HT NORM
(100.0)
0.00
0.00
30.15
23.76
0.00
31.7*
0.00
1.F9
0.00
fc.92
0.00
0.00
.43
2.91
0.00
.93
0.00
0.00
.47
.80
.55
v?ATER-C02-FKtE
(100.0)
54.27
.49
21.61
2.67
2.31
.16
.78
2.39
10.00
5.11
.21
NON-OX 1DAT ION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
30.30
22.69
0.00
32.55
0.00
0.00
.50
7.24
0.00
0.00
4.50
0.00
0.00
.94
0.00
0.00
.47
.HI
.25
SITl
AL
FL3
Ft2
MN
Mo
CA
NA
K
P
H*
H-
Cs
0
ATOMS
WEIGHT
23.68
.28
10.68
1.74
1.68
.12
.44
1.59
6.93
3.96
.09
.06
.01
.09
0.00
48.55
NIGGL1
SIAL
FM
C
ALK
K
MGTI
P
C/FM
QZ
ATOMS
NUMBERS
19.11
8
6
2
13
97
71
68
05
41
90
R3
30
06
59.84
162
38.0
15.7
7.6
38.7
.25
.22
1.1
.27
.49
-91
(100.0)
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
U.I.
23.86
3
72
22
10
(.7
57
29
13
75
4C
15
62
22
lh
19
86.43
No. 1132
REMARKS: High water content.
MINERALOGY: Phenocrysts: Abundant nepheline, with
altered margins (hydrated and carbonated); scarce
corroded biotite, apatite. Groundmass: Phonolitic
texture; nepheline, aegirine-augite, no sodalite, no
iron-oxides.
No. 1133
REMARKS: Repossi gives a summation of 100.48, but
the actual summation of his figures (op. cit. p. 286) is
108.78. Examination of the Niggli values calculated by
Repossi from this analysis reveals that the error lies in
the AlpO- figure. To obtain the published summation,
8. 30% has been subtracted from the published A12O^,
21.15% to obtain 12.85% as given here.
MINERALOGY: Phenocrysts: Labradorite, with ilmenite
inclusions scarce pale-green augite, rare rounded
olivines. Groundmass: Plagioclase, pyroxene, rare
olivine and glass; accessory ilmenite, magnetite, apatite.
OTHER INFORMATION: Repossi discusses basalts from
the Mt. Chilalo and Gasara (Bali) regions under one
heading. This rock is usually cited by later authors
as from Gasara -- see Comucci (1948) and Hieke-Merlin
(1950) -- but a careful reading of Repossi (p. 286)
reveals that Mt. Chilalo is the locality.
No. 1134
REMARKS: SiO^ seems high for the given mineralogy.
MINERALOGY: Phenocrysts: None. Groundmass:
Labradorite, augite, olivine, common magnetite,
scarce glass.
1133
PASALT
E. REpOSSI, 1932
UOUr>TKUL LOCALITY nNEAR MT. CHILALO, ARUSSI?
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2U*
H2U-
C02
S03
TOTAL
OklGINAl
ANALYSIS
50.92
3.07
12.85
4.33
8.44
.22
5.66
10.78
2.63
.77
.43
.20
.18
0.00
0.00
0.00
0.00
0.00
0.00
100.48
WATER-C02-FKEE
(100.0)
50.87
3.07
12.84
4.33
8.43
.22
5.65
10.77
2.63
.77
.43
SITl
ALFE3
FE.2
MNMb
CANA
KP
H+
H-C
S
ATOMS
HEIGHT
23.79
1.84
6.80
3.03
6.56
.17
3.41
7.70
1.95
.64
.19
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.80
.85
5.59
1.21
2.61
.07
3.12
4.?7
1.88
.36
.13
HEIGHT NORM
(100.0)
CBOR
ABAN
NFLC
ACNS
DIMO
HYOL
MT
HM
ILTI
R'JAP
CC
MGO/MfaO*FEO
IN FtMCS =
0.00
4.56
22.27
20.93
0.00
0.00
0.00
0.00
24.38
0.00
V.57
0.00
6.29
0.00
5.S2
0.00
0.00
.94
0.00
.72
NON-OXlDATION NORM
(FE2O3 CONVERTED TO FEO)
.6B
0.00
4.59
22.46
21.11
0.00
0.00
0.00
0.00
25.27
0.00
19.07
0.00
0.00
0.00
5.87
0.00
0.00
.95
0.00
SIAL
FMC
ALK
124
18
46
28
7
C/FM
OZ
3-COMPONENT
WT.PEHCENTS
F 58.50
M 75.93
A 15.57
F 47.38
C 40.00
A 12.62
1134
TRACHYBASALT (KECtflT COHE)
OB.33W 39.17E. ADAMA, SHOA
E. REpOSSl, 1932
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA.-0
K20
P2O5
H20*
H20-
C02
S03
TOTAL
OK K. I'ML
ANALYSIS
57.54
1.06
14.40
3.99
6.R2
.13
2.09
4.41
4.49
4.38
.32
.08
.08
0.00
o.no
0.00
o.oo
0.00
0.00
99.79
V?ATER-CO2-F*EE
(100.0)
57.75
1.06
14.45
4.00
6.65
.13
2.10
4.43
4.51
4.40
.32
SITI
ALFE3
FE2
MM
MG
CA
NA
KP
H*H-
Cs
ATOMS
WEIGHT
26.88
.64
7.62
2.79
5.30
.10
1.26
3.15
3.33
3.64
.14
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.93
.?9
6.17
1.09
2.08
.04
1.14
1.72
3.17
2.03
.10
0
CPOR
ASAM
NELC
ACNS
DI
WO
HY
OL
MT
HIIL
TIRD
AP
CC
MGO/hGO+FEO
IN J-'tl-'.ICb =
FLIGHT NORM
(100.0)
2.21
0.00
26.04
3H.22
6.15
0.00
0.00
0.00
0.00
11.71
0.00
7.13
0.00
5.K2
0.00
2.02
0.00
o.oo
.70
0.00
.47
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
26.24
38.51
6.20
0.00
0.00
0.00
0.00
12.09
0.00
7.91
6.29
0.00
0.00
2.03
0.00
0.00
.71
0.00
? 29
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 49.66
M 9.60
A 40.74
F 44.87
C 18.31
A 36.8?
N 33.HI
K 32.9H
C 33.21
1135
PANTELLtKITIC wLLOEO TJFF
, OOUS'TFuL LOCALITi (MT. KAKKA, AKUSSI)
F. REpOSSl, 1932
SIU2
TIU2
AL2O3
FE203
FEO
MMO
CAU
NA2O
K2O
P2O5
H2O*
H2O-
SO3
ANALYSIS
71. 9H
? 36
10.15
5.15
1.78
.14
.16
.22
4.37
5.07
0.00
0.00
0.00
0.00
0.00
0.00
100.34
v,ATER-tO2-FKEE
(100.0)
10.20
5.17
1.79
4.39
5.09
SI
Tl
AL
FE3
Ft2
ATOMS
HEIGHT
33.63
.22
5.37
3.60
1.38
.11
.10
.16
3.24
4.21
0.00
0.00
ATOhS
NUMBERS (100.0)
rvtlCHT NOPM
(100.0)
28.94
0.00
30.19
24.04
0.00
0.00
0.00
11.64
0.00
ILTI
RU
APcc
MGO/MGO*FEO
In FEMICS =
.t.9
0.00
0.00
.31
0.00
.21
NON-OXlDATIuN NORM
(FE2O3 CONVERTED TO FEO)
29.82
0.00
30.49
24.28
0.00
0.00
0.00
0.00
3.10.24
0.0011.05
0.000.00
0.00
.69
0.000.00
.310.00
.05
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
X.C
D.I.
41.92
.97
57.11
41.77
1.33
58.90
45.24
52.48
2.28
97.74
No. 1135
MINERALOGY: Green, flow-textured rock. Phenocrysts:
Anorthoclase, scarce quartz. Groundmass: Brown glass
(n 1.510), magnetite and aegirine-augite microlites,
fragments of basalt.
OTHER INFORMATION: Repossi notes the uncertainty
of this locality, and a more likely source for such a
rock-type is either eastern Ghedeb, further south, or
Adama, further north.
No. 1136
MINERALOGY: Phenocrysts: An65, rare serpentinised
olivine. Groundmass: Plagioclase, Fe-rich olivine,
magnetite, altered rose-coloured material; no augite,
no glass.
OTHER INFORMATION: Basalts from:
Abalti: Large augite phenocrysts rimmed with
magnetite, large olivines, small An50, in groundmass
plagioclase, magnetite, glass. Jimma: Zoned pheno-
crysts, An50 (center) to An70 (rim). Agaro: Zoned
phenocrysts, An70 (center) to An55 (rim), in groundmass
of plagioclase, olivine, augite, magnetite, very rare
glass.
No. 1137
REMARKS: High Fe2O due to weathering(?).
MINERALOGY: Phenocrysts: Sodic labradorite.
Groundmass: Plagioclase, brown hornblende, biotite(?).
1136
OLlVlNE BASALT
07.39N 36.02E. ACHEVO,
P. COrtUCCI. 1933A
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P205
H2O*
H2O-
CO2
SO3
ORIGINAL
ANALYSIS
48.08
2.P6
17.52
3.37
7.87
.05
5.58
9.17
3.19
1.46
0.00
.64
.P2
0.00
0.00
0.00
0.00
*ATER-C02-FREE
(100.0)
.05
5.63
SI
TI
AL
FE3
FL2
MH
MG
C*
NA
K
P
H+
H-
Cs
ATOMS
*EIGHT
22.46
1.71
9.27
2.36
6.12
.04
3.37
6.55
2.37
1.21
0.00
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.77
.80
7.63
.94
2.44
.02
3.08
3.63
2.29
.69
0.00
0
CH
OR
AB
AN
NF
LC
AC
NS
DI
WO
HY
OL
f?T
H?t
IL
TI
R'J
AP
CC
MG0/M60+FE0
I iM b =
?E.IGHT NORM
(100.0)
0.00
0.00
b.72
27.28
29.38
0.00
0.00
0.00
0.00
13.45
0.00
.50
10.26
4.94
o.co5.47
0.00
0.00
0.00
0.00
.72
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
8.78
23.82
29.58
1.97
0.00
0.00
0.00
13.85
0.00
0.00
16.49
0.00
0.00
5.51
0.00
0.00
0.00
0.00
.55
115
24.7
42.0
23.6
9.7
.23
.48
5.2
0.00
.56
-24
3-COMPONENT
rtT.PERCENTS
F
M
A
F
C
A
N
K
C
52.35
25.99
21.66
44.85
36.59
18.56
23.08
10.56
66.35
1137
?GORF ROCK* n^LRSA
08.09U 35.32E.
P. COMUCCI? 1933A
HILL, ;URE, ILUBABOR
SIU2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
50.74
2.27
15.31
9.88
5.40
.03
2.66
6.04
3.bB
2.60
0.00
1.00
1.12
0.00
0.00
0.00
0.00
0.00
0.00
100.63
*ATER-C02-FREE(100.0)
51.51
2.3015.54
10.03
5.48.03
Si
TI
AL
FL3
FE2
MN
Mi
CA
NA
K
P
H*
H-
cs
ATOMS
WEIGHT
23.71
1.36
8.10
6.91
4.20
.02
1.60
4.32
2.66
2.16
0.00
.01
.01
0.00
0.00
ATUMS
NUMBERS (100.0)
19.03
.64
6.77
2.79
1.70
.01
1.49
2.43
2.60
1.25
0.00
Q
CB
OR
AB
AN
NELC
AC
HS
DI
MO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MG0*FEU
IN FEMICS =
rttlGHT NORM
(100.0)
5.58
0.00
15.63
30.Hl
18.25
0.00
0.00
0.00
0.00
9.53
0.00
2.32
0.00
11.13
2.3S
4.37
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
15.94
31.41
18.60
0.00
0.00
0.00
0.00
10.71
0.00
5.94
12.93
0.00
0.00
4.46
0.00
0.00
0.00
0.00
.29
C
ALK
K
MG
TIP
C/FM
OZ
17.714.0
.i
.2
4.7
0.0
.4
-18
3-COMPONE.NT
WT.PERCENTS
F 63.35
M 11.03
A 25.62
F 55.56C
 21.96A 22.47
N 29.30
K 21.28
C 49.43
1136
PlCRITIC LASALT
14.58N 43.HE. 45KM E. OF HODEIDA,
P. COMUCCI, 1933B
SIO2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O +
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
40.86
3.66
11.54
10.00
4.59
.1<>
11.10
14.28
.76
1.00
0.00
1.97
.16
0.00
0.00
0.00
0.00
0.00
0.00
100.13
WATER-C02-FREE
(100.0)
41.69
3.73
11.78
10.20
4.68
.19
11.33
14.57
.80
1.02
0.00
51TI
ALFE3
FE2
MMMb
CANA
KP
H*
H-C
S
0
ATOMS
HEIGHT
19.09
2.19
6.11
6.99
3.57
.15
6.70
10.21
.58
.83
0.00
.02
.00
0.00
0.00
43.70
ATOMS
NUMBERS (100.0)
15.73
1.06
5.74
2.90
1.48
.06
6.38
5.89
.58
.49
0.00
60.18
NORM SIO2 DEFICIT 0.00
WEIGHT
0
enOR
ABAN
NE
LCAC
NSDI
WO
HY
OL
MT
H'-1
IL
TIRU
APCC
0.00
0.00
6.04
3.;?7
25.52
1.P9
U.00
0.00
0.00
36.51
0.00
0.00
7.94
4.94
6.61
7.08
0.00
0.00
0.00
0.00
-1.27
NON-OXIDATION NORM
FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
26.02
3.73
4.83
0.00
0.00
39.01
0.00
0.00
20.51
0.00
0.00
7.22
0.00
0.00
0.00
O.OO
NIGGLl
SI
ALFM
CALK
KMG
TIP
C/FM
QZ
79
13
54
29
2
5
0
2
5
7
7
46
59
3
00
55
-32
3-COMPONENT
WT.PERCENTS
F
MA
FC
A
NK
C
D.I.
53.11
40.41
6.4ft
47.60
46.59
5.81
4.86
6.23
88.97
56.79
IN FEMCS = 1.00
No. 1138
MINERALOGY: Phenocrysts: Large titanaugite, large
colourless Mg-rich divine. Groundmass: Brown glass;
magnetite; microlites of augite and olivine; rare
plagioclase.
No. 1139
MINERALOGY: Phenocrysts: Common large augite,
less common, smaller Mg-rich olivine. Groundmass:
Clear brown glass (more abundant than in 1138), micro-
lites augite and olivine(?).
No. 1140
MINERALOGY: Phenocrysts: Not abundant, large yellow
augite, iddingsitised olivine. Groundmass: Ca-rich
plagioclase, augite; no glass.
1139
PICRITIC hASALT
15.25N 44.11E,
P. COMUCC1, 19330
iM. OF SANA. YE?1EN
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
OKI&INAL
ANALYSIS
41.30
3.20
13.86
6.86
6.42
.20
8.76
13.44
1.06
1.66
0.00
2.52
.58
0.00
0.00
0.00
0.00
0.00
0.00
99.86
fcATER-C02-FNEE
(100.0)
42.68
3.31
14.32
7.09
6.63
.21
9.05
13.89
1.10
1.72
0.00
SITI
AL
Ft 3
FE2MN
MGCA
NA
KP
H*
H-C
S
ATOMS
.EIGHT
19.30
1.92
7.33
4.80
4.99
.15
5.28
9.61
.79
1.38
0.00
.03
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
16.05
.94
6.35
2.01
2.09
.07
5.08
5.60
.RO
.82
0.00
5102 DEFICIT 0.00
0
CBOR
ARAN
NELC
ACNS
DIMO
HY
OL
MT
HMIL
TIRU
APCC
k.?lbHT NORM
(100.0)
0.00
0.00
10.16
2.97
29.07
3.42
0.00
0.00
0.00
31.30
0.00
0.00
6.51
10.30
0.00
6.27
0.00
0.00
0.00
0.00
-.18NON-OXIDATION NORM
(F-E203 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
29.47
5.10
8.08
0.00
0.00
33.26
0.00
0.00
17.93
0.00
0.00
6.36
0.00
0.00
0.00
0.00
MGO/MGO*FEO
IN FEMCS =
C
ALK
3-COMPONENT
WT.PERCENTS
F 53.63
M 35.3H
A 10.99
F 45.11
C 45.65
10.27
H3.17
1140
PICRITIC fc,ASALT
15.08N 43.4t>t. nETWEEN MAFHAQ AND SUK-EL-KAMI5,
P. COMUCCI, 1933L
SIU2
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
OKI&INAL
ANALYSIS
42.64
5.10
10.66
9.07
6.34
.30
7.44
13.06
1.63
.65
0.00
3.21
.38
0.00
0.00
0.00
0.00
0.00
0.00
100.48
WATER-C02-FKLE
44.01
5.26
11.00
9.36
6.54
.31
7.68
13.48
1.68
.67
0.00
(100.0)
SITI
AL
Ft3Ft2
MNMt,
CA
NAK
PH*
H-C
s
ATOMS
HEIGHT
19.92
3.06
5.64
6.34
4.93
.23
4.49
9.33
1.21
.54
0.00
.04
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
16.69
1.50
4.92
2.68
2.08
.10
4.35
5.48
1.24
.32
o.oo
Q
CROR
AB
ANNE
LCAC
NS
DIwo
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGOtFEO
IN FEMICS =
WLlGHT NORM
(100.0)
1.21
0.00
3.97
14.26
20.46
0.00
0.00
0.00
0.00
36.23
0.00
2.37
0.00
6.90
4.62
9.99
0.00
0.00
0.00
0.00
1.00
NON-OXIOATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.04
9.74
20.83
2.59
0.00
0.00
0.00
39.12
0.00
0.00
13.51
0.00
0.00
10.17
0.00
0.00
0.00
o.oo
.58
c
ALK
3-COMPONENT
WT.PERCENTS
F 61.37
M 29.61
A 9.07
F 50.11
C 42.47
10.63
4.24
85.14
1141
PICRITIC BASAUT15.24N 44.11E,
p. COWJCC:. i93
2K>". N. OF SANA. YEMtN
SIU2
TIO2
AL2O3
FE2O3
FEO
MNu
MflO
CAu
NA2O
?C2U
P205
H2O*
H2U-
CO2
SO3
TOTAL
UKIfclNA
ANALY5I
43.30
3.98
12.36
11.49
5.84
.18
6.70
10.81
2.02
L.79
0.00
1.49
? 58
0.00
0.00
0.00
0.00
0.00
0.00
100.54
wATER-C02-FKEE
1211
5
6
10
2
1
0
.55
.67
.93
.18
.80
.98
.05
.82
.00
51TI
ALFL3
FE2MN
MCCA
NAiC
PH*
H-C
s
ATOMS
HEIGHT
20.232.39
6.548.04
4.54
.14
4.047.73
1.501.49
0.00
.02
.01
0.000.00
ATOMSNUMBERS (100.0)
16.671.15
5.613.34
1.88
.06
3.854.46
1.51
.86
0.00
0.000.00
10.7617.39
19.630.00
0.000.00
ILTI
RU
APCC
MGU/MGU+FEOIN FtMCS =
7.670.00
0.00
0.000.00
1.00
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
0.00
0.0011.01
6.B5
20.085.92
0.000.00
0.00
29.820.00
0.0018.47
0.00
0.007.84
0.000.00
0.00
0.00
.50
NIGGLI
SI
C/FM
OZ
0.00.49
-33
3-COMPONENT
WT.PERCENTS
F 62.25
M 24.07
A 13.69
C
O.I.
54.2433.83
11.92
13.8?
12.24
73.94
No. 1141
MINERALOGY: Phenocrysts: Large colourless augite;
equally abundant olivine, serpentinised or occasionally
iddingsitised. Groundmass: Flow-texture; plagioclase,
augite, magnetite; no glass or olivine.
No. 1142
MINERALOGY: Phenocrysts: Augite, uncommon, small
Mg-rich olivine (serpentinised and iddingsitised).
Groundmass: Abundant augite; plagioclase, magnetite;
no glass.
No. 1143
MINERALOGY: Vesicular rock. Phenocrysts: Zoned
brown-red augite, serpentinised olivine. Groundmass:
Labradorite-andesine, augite, abundant magnetite.
PICRITIC BASALT
15.02N 43.49E, 15KM W. OF MAFHAo,
P. COMUCCI, 193311
SIO2
TIO2
AL2O3
FE2O3
FEoMNO
MGOCAU
NA20
K2O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
ORIGINAL
ANALYSIS
45.52
3.10
10.64
7.44
5.42
.18
11.24
11.14
1.80
1.06
0.00
2.29
.60
0.00
0.00
0.00
0.00
0.00
0.00
100.43
WATER-C02-FREEuon.oi
46.67
3.18
10.91
7.63
5.56
.IB
11.52
11.42
1.85
1.09
0.00
SITl
ALF?3
FE2MN
MGCA
NA<
P
H+
H-C
S
ATOMS
WEIGHT
21.27
1.86
5.63
5.20
4.21
.14
6.78
7.96
1.34
.88
0.00
.03
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.30
.89
4.77
2.13
1.73
.06
6.38
4.54
1.33
.51
0.00
MGO/MGO+FEU
IK FfcMICS =
WEIGHT NORM
(100.0)
0.00
0.00
6.43
15.64
18.24
0.00
0.00
0.00
0.00
30.00
0.00
9.07
4.05
9.34
1.20
6.03
0.00
0.00
0.00
0.00
NON-OX lOAT ION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.53
13.47
18.51
1.30
0.00
0.00
0.00
31.80
0.00
0.00
22.27
0.00
0.00
6.12
0.00
0.00
0.00
0.00
0.00
? 44
-25
3-COMPONENT
WT.PERCENTS
F 47.70
M 41.69
A 10.61
F 47.88
C 41.47A 10.65
1143
OLlVlNE-AUGlTt BASALT
15.ION 43.5fE, TAHAF
P. COMUCCI, 1933B
:RID,L. SUK-tL-KAMS, YEMtN
SIU2
TI02
AL203
FE2O3
FEUMNO
MGO
CAU
NA2O
K20
P2O5
H2O+
H2O-
CO2S03
TOTAL
ANALYSIS
45.56
3.20
11.82
7.15
6.34
.20
9.17
12.30
1.64
1.22
0.00
1.79
.14
0.00
0.00
0.00
0.00
0.00
0.00
100.53
fcATER-C02-FREE
(100.0)
46.21
3.25
11.99
7.25
6.43
.20
9.30
12.47
1.66
1.24
0.00
SITI
ALFE3
Ft2
MN
Mb
CANA
<P
H*
H-C
s
ATOMS
WEIGHT
21.29
1.92
6.25
5.00
4.93
.15
5.53
8.79
1.22
1.01
0.00
.02
.00
0.00
0.00
ATOMS
NUMHERS (100.0
17.25
5
2
2
5
4
1
0
91
27
04
01
06
18
99
20
59
00
0CB
ORAR
AN
NELC
ACNS
DIWO
HYOL
WTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NOKM
(100.0)
0.00
0.00
7.33
14.10
21.56
0.00
0.00
0.00
0.00
31.61
0,00
7.24
1.47
10,53
0.00
6.16
0.00
0.00
0.00
0.00
.97
NON-OXIDATION NORM
UE203 CONVERTED TO FEO)
0.00
0.00
7.43
10.58
21.86
2.01
0.00
0.00
0.00
33.63
0.00
0.00
18.24
0.00
0.00
6.24
0.00
0.00
0.00
0.00
.63
C/FM
QZ
97
14. 8
52.2
28.0
5.0
.33
.56
3-COMPONENT
WT.
FM
A
F
C
.PERCENTS
52
35
11
47
42
.86
.93
.21
.09
.93
1144
APHVR1C eASALT
14.57N 43.33E, 3KM N. OF HAjELA,
P. COMUCCI, 1933'J
SIU2
TIU2
AL2O3
FE2O3
FEOMNU
MGUCAO
NA2OK20
P?05
H20*
H2O-
CO2SO3
TOTAL
0
ceOR
A8AM
N?LC
ACNS
DI
MOHY
OL
HM
IL
TI
R'.lAP
CC
IN FtMICb =
ORIGINAL
ANALYSIS
50.18
2.68
11.20
12.72
3.42
.21
5.58
10.04
2.05
1.00
0.00
1.16
.26
0.00
0.00
0.00o.oo
0.00
0.00
100.50
WEIGHT NORM
(100.0)
11.35
0.00
5.98
17.54
18.55
0.00
0.00
0.00
0.00
24.78
0.00
2.57
0.00
4.00
10.10
5.13
0.00
0.00
0.00
0.00
1.00
k,ATER-C02-FREE
(100.0)
50.65
2.70
11.30
12.84
3.45
.21
5.63
10.13
2.07
1.01
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
1.64
0.00
6.13
17.9B
19.01
0.00
0.00
0.00
0.00
27.39
0.00
22.59
0.00
0.00
0.00
5.26
0.00
0.00
0.00
0.00
.46
SITI
ALFE3
FE2MN
MGCA
NA<
PH*
H-C
s
0
ATOMS
WEIGHT
23.44
1.61
5.93
8.90
2.66
.16
3.37
7.18
1.52
.83
0.00
.01
.00
0.00
0.00
44.90
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
ATOMS
NUMBERS
18.87
.76
4.96
3.61
1.08
.07
3.13
4.05
1.50
.48
0.00
61.49
12216.1
51
26
6
4
0
3
4
24
40
9
00
51
-3
(100.0)
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
N
K
C
D.I.
65.16
22.53
12.31
55.22
34.35
10.43
15.66
7.64
76.70
74.31
No. 1144
MINERALOGY: Phenocrysts: Rare labradorite. Ground-
mass: Chiefly glass with common magnetite, augite
microlites, rectangular "feldspar" crystals replaced
with chalcedony fibres.
OTHER INFORMATION: Collected from 630 m above
Hajela river.
No. 1145
REMARKS: No separate determinations of FeO, H2O-;
TiO_ included in Al-O ; MgO trace.
MINERALOGY: Phenocrysts: Rare small, altered
anorthoclase. Groundmass: Flow-texture; grey glass
with patches of green glass.
OTHER INFORMATION: From Hajela, sanidine
hyalorhyolite, SiO, 75.06%. From Mt. Nekum, San'a,
obsidian, SiO_ 59%.
No. 1146
REMARKS: No separate determinations of FeO, H2O-;
TiOp included in Al^O,; MgO trace.
MINERALOGY: Groundmass: Rather fine-grained,
uniform grain size, quartz and sericitised K-feldspar.
OTHER INFORMATION: From 3 km east of Manaka,
yellow-green rock with iron-stained concentric zoning;
too fine-grained for microscopic resolution; possibly
a glassy alkali rhyolite(?): SiO2 77.94%, R2O3 12.74%
(low in iron), H2O 1.92%, a little CaO, no CO,.
11*5
HYALORHYOLITC:
15.08N 43.46E,
P. COMUCC1, 1933i:
1OK.M N. OF MAFhAk. YEMEN
SIO2
TIO2
AL2O3
FE2O3
FEO
MMO
MGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
OKIGIIJA,
ANALYSIS
73. 2B
0.00
13.66
1.90
0.00
0.00
0.00
.56
3.44
6.18
0.00
1.16
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.18
.ATER-C02-FKEE
(100.0)
74.01
0.00
13.80
1.92
0.00
0.00
0.00
.57
3.47
6.24
0.00
SITl
ALF?3
FE2
MN
MG
CANA
KP
H*H-
C
5
ATOMS
HEIGHT
34.24
0.00
7.23
1.33
0.00
0.00
0.00
.40
2.55
5.13
0.00
.01
0.00
0.00
0.00
ATOHSNUMBERS (100.0)
25.54
0.00
5.61
.50
0.00
0.00
0.00
.21
2.33
2.75
0.00
0
CB
OR
AB
AN
NELC
ACNS
DIWO
HYOL
MT
HMIL
TIRU
AP
CC
MGU/MGO+FEO
IN FEMCS =
WEIGHT NORM
(lon.o)28.53
.27
36.99
29.48
2.81
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.92
0.00
0.00
0.00
0.00
o.oo
0.00
NON-OX IOAT IUN NORM
(FE2O3 CONVEKTED TO FEO)
27.33
.27
37.13
29.56
2.82
0.00
0.00
0.00
0.00
0.00
0.00
2.87
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
SIAL
FMC
ALK
K
MG
TIP
C/FM
OZ
421
46.3
8.2
3.5
42.0
? b4
0.00
0.0
0.00
.42
153
3-C0MP0NENT
WT.PERCENTS
F 16.49
33.79
60.71
5.50
1146
TERTIARY Mc
15.01N 43.4t
P . COMUCCI,
SIQ2
TI02
AL2O3
FE2O3
FFO
MNO
MGO
CAU
NA20
K20
P2U5
H2U*
H2U-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
78.84
0.00
11.97
.87
0.00
0.00
0.00
.52
2.43
5.C5
0.00
.88
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.56
V.ATER-C02-FREE
(100.0)
79.09
0.00
12.01
.87
0.00
0.00
0.00
.52
2.44
5.07
0.00
SITI
ALFE3
FE2
MN
MG
CA
NAK
P
H.
H-
cs
ATOMS
WEIGHT
36.83
0.00
6.33
.61
0.00
0.00
0.00
? 37
1.80
4.19
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
27.04
0.00
4.84
.22
0.00
0.00
0.00
.19
1.62
2.21
0.00
WEIGHT NORM
(100.0)
44.27
1.5430.03
20.69
2.60
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00.88
0.00
0.00
0.00
0.00
0.00
IIM FEHICS = 0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
43.75
1.55
30.08
20.72
2.60
0.00
0.00
0.00
0.00
0.00
0.00
1.30
0.00
0.00o.oo
0.00o.oo
0.00
0.00
0.00
0.00
NIGGLI
SIAL
FM
CALK
KMG
TI
P
C/FM
OZ
?568
50.9
4.7
4.0
40.3
.58
0.00
0.0
0.00
.85
307
3-COMPONENT
WT.PERCENTS
F
M
A
F
CA
N
K
C
D.I.
10.4?
0.00
89.58
9.81
5.86
R4.33
30.37
63.1?
6.50
LOO.00
1147OLlVlNE-Au'llTt BASALT
14.00N 42.45E. jE(,EL <"Ui UR IS.
P. COMUCCI, 1933C
SIU2
TIU2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2G
P2Q5
HZU*
H2U-
CO2
SO3
TOTAL
ORI&lr.A,
ANALYSIS
45.56
3.10
16.28
11.55
1.91
.16
6.01
11.34
2.P7
1.06
0.00
.76
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.60
k.ATEK-CO2-FKEE
45.63
3.10
16.31
11.57
1.91
.16
6.02
11.36
2.87
1.06
0.00
(100.0)
SITl
AL
FE.3
FE2
MN
Mb
CA
NA
KP
H*H-
Cs
0
ATOMS
?EIGHT
21.29
1.86
8.61
8.08
1.48
.12
3.63
8.10
2.13
.86
0.00
.01
0.00
0.00
0.00
44.41
ATOMS
NUMBERS (100.0)
16.R9
.87
7.12
3.23
.59
.05
3.33
4.51
2.06
.50
0.00
60.85
0
CR
ORAn
ANNE
LCAC
NSDI
MO
HY
OL
MT
HM
IL
TI
RU
AP
CC
KGU/MCiO-fFEO
IM FEMICS =
WEIGHT NOPM
(100.0)
0.00
0.00
6.29
23.90
28.41
.25
0.00
0.00
0.00
19.69
0.00
0.00
4.13
0.00
11.59
4.39
1.35
0.00
0.00
0.00
1.00
NON-OX I DAT I ON NORM
(FE2O3 CONvFtUED TO FEO)
0.00
0.00
6.43
14.35
29.06
5.72
0.00
0.00
0.00
23.7B
0.00
0.00
14.64
0.00
0.00
6.02
0.00
0.00
0.00
0.00
.55
NlGGLl
SIAL
FM
C
ALKK
MGTI
PC/FM
OZ
102
21.
43.
27.
7.
5.
0.
-29*
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
57.5?
25.68
16.79
46.85
39.47
13.6ft
No. 1147
REMARKS: H2O- trace.
MINERALOGY: Phenocrysts: Zoned An60 (center) to An30
(rim) large brown-red augite, altered olivine. Ground-
mass: Flow-texture; labradorite, augite, fresh olivine;
uncommon black glass with magnetite-ilmenite.
No. 1148
REMARKS: Analyst P. Comucci.
MINERALOGY: Phenocrysts: Olivine. Groundmass:
Ophitic, holocrystalline; zoned An70-50; titanaugite,
olivine, scarce magnetite, calcite.
OTHER INFORMATION: From Moga, on the Hafun
Peninsula, North Somali: an erratic boulder of olivine
basalt on the shoreline (note: the nearest land-exposure
of basalt is 250 km to the WNW on the Gulf of Aden coast.
This erratic is presumably derived from the Indian Ocean
floor). Niggli values (the original analysis is not given):
si 92.9, ti 2.6, al 17.3, fm 47, c 30, alk 5.7, mg. 0.56,
k 0. 18. Mineralogy: Fresh olivine phenocrysts in a
medium-grained groundmass of zoned An70-50, olivine,
ophitic titanaugite, uncommon magnetite.
No. 1149
MINERALOGY: Phenocrysts: Andesine-labradorite,
augite, magnetite. Groundmass: Feldspar, hornblende,
nepheline.
OTHER INFORMATION: Specific gravity 2. 564,
published norm inaccurate.
118
AuGlTE-OLIVlNE BASALT
11.2511 5O.OOE, 15KM
P. ALOISI, 1934
ESF OF KANDALA, N. SOMALI
SIO2
TIO2
AL2O3
FE2O3
Ff.0
MNOHGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
C02
SO3
TOTAL
ORIGI'JAl
ANALYSIS
44.42
1.70
14.05
6.54
5.69
.17
B.44
13.37
2.32
.80
0.00
.P2
.16
1.77
0.00
0.00
0.00
0.00
0.00
100.25
WATER-C02-FNEE
(100.0)
6.71
5.84
.17
8.66
13.71
2.38
.82
0.00
SITI
ALFE3
FE2MN
MbCA
NAK
P
Ht
H-C
S
ATOMS
WEIGHT
20.75
1.02
7.43
4.57
4.42
.13
5.09
9.56
1.72
.66
0.00
.01
.00
.48
0.00
ATOMS
NUMBERS (100.0)
16.89
.49
6.30
1.88
1.81
.05
4.79
5.45
1.71
.39
0.00
IN FEI- ICS =
wLlGHT NORM
(100.0)
4.77
25I7I
0.00
0.00
0.00
0.00
23.59
0.00
.79
H.44
9.57
0.00
3.25
0.00
0.00
0.00
4.06
.92
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
4.8312.89
26.04
3.890.00
0.000.00
24.94
0.000.00
20.010.00
0.00
3.290.00
0.00
0.00
4.12
.61
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 51.41
M 35.4B
A 13.11
F 42.58
C 46.55
A 10.86
N 14.07
K 4.85
C 81.08
1149
PHONOLITIC TRACnYLASALT
10.15iM 35.12E, M. ".Zu-ODO
L. MUHLEN AND J.H. HELL.'iERS,
SIU2
TI02
AL2O3
FE203
FEOMNU
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
5
TOTAL
ANALYSIS
55.62
.30
17.Bl
1.46
5.49
1.42
.55
^.32
6.89
7.08
.27
.71
.16
.12
0.00
.12
0.00
0.00
0.00
100.32
?tATER-C02-FRtE
(100.0)
56.06
.30
17.95
1.47
5.53
1.43
.55
2.34
SITI
ALFL3
FE2
MN
Mb
CA
NA
k
P
H +
H-C
S
ATOMS
WEIGHT
25.99
.18
9.42
1.02
4.27
1.10
.33
1.66
5.11
5.88
.12
.01
.00
.03
0.00
ATOfcS
NUMBtRS (100.0)
20.18
.08
7.62
.40
1.67
.44
.30
.90
4.R5
3.28
.08
0
CROR
At)AN
NELC
ACNS
DIWO
HY
OLMT
HMIL
TIRU
AP
CC
MGO/MGG+hFO
IN FEMICS r
WEIGHT IvORM
(100.0)
0.00
0.00
42.22
17.36
0.00
19.01
0.00
4.26
.35
8.11
0.00
0.00
7.24
U.00
0.00
.57
0.00
0.00
.59
.28
.13
NON-DXIDATIUN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
42.33
19.95
0.00
17.68
0.00
0.00
1.48
8.15
0.00
0.00
8.94
0.00
0.00
.57
0.00
0.00
.60
.28
.11
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 32.37
42.3043.46
14.24
1150
PHONOLITL
10.15N 35.12E, HT. B.ELMODO, rfOL
L. MUriLtN AND J.H. HtLLMEKS. 1936
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
S
TOTAL
0
CBOR
ABAN
NELC
AC
ORIGINAL
ANALYSIS
56.19
1.42
17.15
1.72
6.48
? 85
.98
3.70
3.C6
6.91
.13
.62
.19
.16
0.00
.17
0.00
0.00
0.00
100.53
(.EIGHT NORM
(100.0)
0.00
0.00
41.12
28.09
9.02
2.60
0.00
0.00
WATER-C02-FKEE
(100.0)
56.53
1.43
17.26
1.73
6.52
.86
.99
3.72
3.88
6.95
.13
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
41.25
26.18
9.05
3.69
0.00
0.00
SI
TlAL
Ft3FE2
MNMo
CANA
KP
H*H-
Cs
0
ATOMS
WEIGHT
26.25
9
1
5
2
2
5
0
85
07
20
04
66
59
64
86
74
06
01
00
04
00
45.34
NIGGLI
SIAL
FM
CALK
KMG
T
ATOMS
NUMBERS (100.0)
20.53
7
1
1
2
3
39
38
47
98
26
53
45
74
22
04
61.00
180
32.4
28. t
12."
26. <
3.<
>
4
6
HMIL
T!
RU
AP
ccMfiO/MGO*l-Ld
0.00
2.71
0.00
0.00
.29
.37
0.00
6.70
0.00
0.00
9.76
0.00
0.00
2.72
0.00
0.00
.29
.37
3-COMPONENT
WT.PERCENTS
F 41.10
M 4.91
A 53.98
F 36.17
C 16.32A 47.51
N 26.68K 47.75
C 25.57
No. 1150
REMARKS: Strongly potassic.
MINERALOGY: Phenocrysts: Plagioclase, nepheline,
some hauyne. Groundmass: Flow-texture; glass, with
andesine and nepheline; rare biotite, magnetite, horn-
blende, augite, olivine.
OTHER INFORMATION: Specific gravity 2.501.
No. 1151
REMARKS: Republished by Hieke-Merlin (1950) (see this
list no. 1224). Hieke-Merlin has taken 2.00% from FeO
and added it to Fe.O,; has interchanged H~O+ with CO?,
and H,O- with total H,O
MINERALOGY: Recent scoriaceous lava. No mineralogy
given by Gortani and Bianchi. For Hieke-Merlin see 1224.
No. 1152
REMARKS: Analysis republished by Hieke-Merlin (1950),
but allocated to a different locality, (see this list no.
1225). No separate H^O- determination.
MINERALOGY: See 1225.
1151
r'ASALT (SEE 1224)
08.30rt 42.53E, MT. FAR50, DAGAMEDO ROAD,
M. GORTANI AND A. iilANCHl , 1937
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H20*
H2O-
CO2
SO3
TOTAL
ANALYSIS
50.41
2.58
15.94
1.26
11.53
.22
5.02
9.28
2.44
1.12
0.00
.36
.24
0.00
0.00
0.00
0.00
0.00
0.00
100.40
WATER-C02-FKEE(100.0)
50.51
2.59
15.97
1.26
11.55
.22
5.03
9.30
2.44
1.12
0.00
SITI
ALFE3
FE2
MN
MG
CA
NA
X
PH*
H-C
S
ATOMS
WEIGHT
23.55
1.55
8.43
.88
8.96
.17
3.03
6.63
1.81
.93
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.64
.72
6.95
.35
3.57
.07
2.77
3.68
1.75
.53
0.00
0
CFS
ORAP
ANNF
LCAC
N5DI
WO
HYOL
MT
HMIL
TIRU
APCC
IN FtMICS =
WEIGHT NORM
(100.0)
.63
0.00
6.65
20.73
29.26
0.00
0.00
0.00
0.00
14.17
0.00
21.P3o.oo
1.S3
0.00
4.91
0.00
0.00
0.00
0.00
.50
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
. 6.66
20.78
29.33
0.00
0.00
0.00
0.00
14.28
0.00
21.96
2.06
0.00
0.00
4.92
0.00
0.00
0.00
0.00
.46
124
23.
3-COMPONENT
WT.PERCENTS
F 59.85
M 23.49
A 16.66
F 49.90
C 36.21
A 13.09
N 19.00
K 8.72
C 72.27
1152
APHYRIC BASALT (SEE 12?!>)
D9.16H 41.45E, NEAR E. SUMMIT,
M. GORTANI AND E. BlANClU, 1937
MT. GARAMULATA, HARARGE
SI02
TI02
AL2O3
FE203
FEOMNU
MOO
CAO
NA20
K20
P2O5
H2U +
H2U-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
51.02
.98
15.40
2.72
10.21
.19
5.04
H.94
2.73
1.32
.76
1.10
0.00
0.00
0.00
0.00
o.oo0.00
0.00
100.41
WATER-C02-FRtE
(100.0)
51.37
.99
15.51
2.74
10.28
.19
5.08
9.00
2.75
1.33
.77
SITI
ALFE3
FE2
MN
MG
CANA
K
PH?
H-C
s
ATOMS
WEIGHT
23.84
.59
8.15
1.90
7.94
.15
3.04
6.39
2.03
1.10
.33
.01
0.00
0.00
0.00
ATUMS
NUMBERS (100.0)
18.87
6
3
2
3
1
27
71
76
16
06
78
55
96
62
24
0
CR
OR
AnAN
NELC
ACNS
DI
WO
HY
OLMT
HM
ILTI
RU
Arc
CC
MGO/MGCHf-LO
IN FtNICS =
WEIGHT NOPM
(100.0)
1.29
0.00
7.87
23.31
26.01
0.00
0.00
0.00
0.00
11.86
0.00
22.13
0.00
3.98
0.00
1.87
0.00
0.00
l.H
0.00
.52
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
7.91
23.43
26.15
0.00
0.00
0.00
0.00
12.06
0.00
22.16
4.72
0.00
0.00
1.88
0.00
0.00
1.68
0.00
.43
MG
TI
P
C/FM
OZ
3-COMPONENT
WT.PERCEhTS
F 58.72
M 22.89
A IB.39
F 49.88
C 34.49
21.02
10.16
68.82
1153
ALKALINE hHYOLITE
13.53N 38.HE, MT. A
G. MEKLft , c. hlMJCCI,
SEITAN, DEMBtGUlNA, TlGRAy
SIO2
TI02
AL203
FET2O3
FEU
MNO
MGO
CAO
NA2O
K?0
P2O5
H2O+
H2O-
C02
SO3
TOTAL
ORIcINAi
ANALYSIS
72.95
.07
13.85
2.50
? 36
.08
.28
.20
5.49
3.23
.11
.72
.43
0.00
0.00
0.00
0.00
0.00
0.00
100.27
ivATER-C02-FKEE
(100.0)73.60
.07
13.97
2.52
.36
.06
.28
.20
5.543.26
.11
SITl
AL
Ft3FE2
MNMG
CA
NAK
P
H+
H-C
S
0
ATOMS
wEIGHT
34.08
.04
7.33
1.75
.28
.06
.17
.14
4.072.68
.05
.01
.01
0.000.00
49.60
ATOMSNUMBERS 1100.0
25.22
5
3
1
02
64
65
10
02
14
07
68
43
03
62. 98
0CR
ORAR
ANNE
LCAC
NS
DIWO
HY
OLMT
ILTI
RU
AP
CC
MG0/M60+FEO
IN FENlCS =
wtlCHT NORM
(100.0)
2B.17
1.18
19.31
46.99
.3")
0.00
0.00
0.00
0.00
0.00
0.00
.71
0.00
1.23
1.C.8.13
0.00
0.00
.24
0.00
1.00
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
26.261.19
19.4147.22
.35
0.000.00
0.000.00
0.000.00
5.19
0.000.00
0.00
.13
0.000.00
.24
0.00
.17
NIGGLl
SIAL
FMC
ALK<
HGTl
P
C/FM
QZ
395
44.
14.
1.40.
135*
3-COMPONENT
WT.PERCENTS
F 24.11
H 2.36
A 73.5?
F 24.28
C 1.70
A 74.0?
N 61.55
K 36.21
C 2.24
No. 1153
REMARKS: Published summation of 100.32.
No. 1154
MINERALOGY: Phenocrysts: An50 (not zoned), fresh
olivine (1/2-mm diameter), rather uncommon. Ground-
mass: Labradorite, titanaugite, olivine, magnetite (some
large crystals), apatite; no glass.
OTHER INFORMATION: Comucci (1933a) refers to a
specimen from this vicinity which contained zoned An60
phenocrysts.
No. 1155
REMARKS: MnO trace.
MINERALOGY: Phenocrysts: Anorthoclase (could be
sanidine) cossyrite. Groundmass: Glass (n = 1.510),
quartzo-feldspathic aggregates, accessory riebeckite,
more common than aegirine.
1154
OLIVINE BASALT
07.39N 36.49E.
G. PAGLIANI, 1940
AIRFltLD, KAFFA
SI02
TIU2
AL203
FE2O3
FEO
MNU
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
42.94
1.69
16.88
2.BO
7.14
.30
10.46
11.98
3.79
1.13
0.00
.97
.40
0.00
0.00
0.00
0.00
0.00
0.00
100.48
WATER-C02-FWEE
(100.0)
43.33
1.7117.03
2.B3
10.5512.09
3.82
SITl
ALFE3
Ft2MN
MGCA
NAK
P
H+
H-
cs
ATOMS
*ElGHT
20.06
1.01
8.93
1.96
5.55
.23
6.31
8.56
2.81
.94
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
15.88
.47
7.36
.78
2.21
.09
5.78
4.75
2.72
.53
0.00
NORM SI02 DEFICIT 0.00
0CB
ORAB
ANNE
LC
ACNS
DIMO
HY
OLMT
I-WIL
TI
RU
AP
CC
MGO/MGO+FLO
IN FtflCS =
WtlGHT KOHM
(100.0)
0.00
0.00
3.73
0.00
2b. 89
17.56
2.37
0.00
0.00
27.39
0.00
0.00
15.72
4.10
0.00
3.23
0.00
0.00
0.00
0.00
8C
-.68
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
26.03
17.65
5.32
0.00
0.00
27.95
0.00
0.00
20.48
0.00
0.00
3.25
0.00
0.00
0,00
0.00
.69
c
ALK
C/FM
QZ
3-COMPONENT
WT.PtRCENTS
F 39.26
M 41.31
A 19.43
F 37.03
C 44.63
A 18.33
N 22.43
IC 6.69
C 70.89
1155
PANTELLERITE (t>RFY-6REErn
07.41N 36.53E, 6K>' E. OF JlMMA,
G. PAGLIAN1, 1940
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MSO
CAO
NA2O
K2O
P2O5
H2O+
H2O-
CO2
SOi
TOTAL
ANALYSIS
68. 58
.49
8.43
4.67
4.80
0.00
.20
.66
6.86
3.45
0.00
1.59
.60
0.00
0.00
0.00
0.00
0.00
0.00
100.33
WATER-C02-FKEE
(100.0)
69.88 SI
TlAL
FE3
FE2
MN
Mo
CANA
<P
H*
rl-
C
5
ATOMS
WEIGHT
32.04
.29
4.46
3.27
3.73
0.00
.12
.47
5.09
2.86
0.00
.02
.01
0.00
0.00
ATOMS
NUMHERS (100.0)
24.73
.13
3.58
1.27
1.45
0.00
.11
.26
4.80
1.59
0.00
Q
cnOR
ABAN
NELC
AC
NSDI
WOHY
OLMT
H'lIL
TIRU
APCC
MGO/MGO+FEO
IU FEMICS =
WEIGHT NORM
(100.0)
25.32
0.00
20.83
24.58
0.00
0.00
0.00
13.81
4.43
2.95
0.00
7.13
0.00
0.00
0.00
.95
0.00
0.00
0.00
0.00
.08
NON-OX I DAT I ON NORM
(FE2O3 CONVEKTED TO FEO)
27.73
0.00
21.02
24.80
0.00
0.00
0.00
0.00
8.15
2.99
0.00
14.34
0.00
0.00
0.00
.96
0.00
0.00
0.00
0.00
.04
0.00
.09
100
3-COMPONENT
WT.PERCENTS47.40
1.00
51.60
46.33
62.5331.45
6.0?
1156
PANTELLERITE (CLJE)
G. PA&LlAnl. 1940
SI02
TI02
AL203
FE2O3
FEJ
MNO
MGO
CAJ
NA2O
K2O
P2O5
H2U*
H20-
C02
SO3
TOTAL
AMALYS1
72.16
0.00
10.06
4.94
1.2B
0.00
^7
.48
5.2b
4.65
0.00
.76
.42
0.00
0.00
0.00
0.00
0.00
o.oo100.60
*ATER-C02-FKEE(100.0)
72.580.00
10.124.97
1.29
0.00.57
.48
5. 314.68
0.00
SITI
ALFt3
Ft2MN
Mfc,
CANA
?ft
<|-
ATOMS
..EIGHT
33.71
0.00
5.32
3.46
.99
0.00
.34
.34
3.92
3.86
0.00
.01
.00
0.00
0.00
ATOMS
NIMHERS (100.0)
25.34
0.00
4.161.31
.380.00
.30
.183.60
2.080.00
0
Cft
OR
ATAN
NFLC
ACNS
DIMO
HYCL
"T
hH
ILTI
RU
AM
CC
MGO/MGO+KF:o
hfcltHT W<M
(100.0)
26.47
0.00
27.72
25.96
0.00
0.00
0.00
14.42
.63
2.02
0.00
2.78
0.00
0.00
0.00
0.00
0.00
0.00
0.00
o.oo
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
28.99
0.00
27.98
26.21
0.00
0.00
0.00
0.00
4.49
2.12
o.oo10.21
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
NIGbLl
SIAL
FM
cALK
KMG
TIP
C/FM
QZ
357
29.4
28.0
2.6
40.1
.37
.15
0.0
0.00
.09
129
3-COMPONENT
WT.PtHCENTS
F 37.20
M 3.41
A 59.39
F 37.40
50.7?44. 6?
No. 1156
REMARKS: TiO2 trace.
MINERALOGY: Phenocrysts: Rounded anorthoclases.
Groundmass: Quartz-anorthoclase, common riebeckite
(no aegirine); accessory biotite, magnetite; no cossyrite.
No. 1157
REMARKS: TiO2 trace.
MINERALOGY: Anorthoclase. Groundmass: Quartz-
anorthoclase, no femics, extremely fine-grained
yellowish background material.
No. 1158
REMARKS: TiO^ and MnO traces; no separate H2O-
determination.
MINERALOGY: Very similar to Jimma pantellerites
(1155-7). Phenocrysts: Anorthoclase. Groundmass:
Quartz-anorthoclase, minute aegirine, rare cossyrite;
calcite-lined vesicles.
1157
PANTELLEHITL (VVHITC)
G. PAt.LIAM? 19*0
SI02
TI02
AL2O3
FE2O3
FEU
MNO
MGO
CAO
NA20
K20
P205
H20*
H2u-
C02
S03
TOTAL
OKItlNAi
ANALYSIS
72.19
0.00
9.80
4.98
1.29
0.00
.4
. bi
5.R
4.5<
0.0(
? 7i
.4
0.00
0.00
0.00
0.00
0.00
0.00
100.7ft
PER?C02?FHEE
(100.0)
.45
.00
.84
.00
.29
.00
.43
.54
.84
.61
.00
SITl
AL
Ffc3
Ft2
MN
MG
CA
NA
KP
Ht
H-
C
s
ATONIS
wEI&HT
33.73
0.00
5.19
3.48
1.00
0.00
.26
.39
4.32
3.81
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
25.30
0.00
4.05
1.32
.38
0.00
.22
.20
3.96
2.05
0.00
0
CB
OR
AS
AN
NELC
AC
NS
01
WO
HY
OL
MT
HI
IL
TI
R'J
AP
CC
MGO/MGO+FEO
IN FtMCS =
WClGHT NORM
(100.0)
26. 81
0.00
27.30
24.90
0.00
0.00
0.00
14.50
1.91
2.29
0.00
2.30
0.00
0.00
0.00
0.00
0.00
0.00
u.oo
0.00
.37
NON-OXIDATION NORM
(FE203 CONvF.KTED TO FEO)
29.35
0.00
27.56
25.14
0.00
0.00
0.00
0.00
5.79
2.39
0.00
9.76
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
.13
NlGGLl
SIAL
FMC
ALK
353
26
26
2
42
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 36.65
53.15
41.92
4.93
1158
PANTELLtKlTIC nELLLD TUFF
08.28K 39.09E. KOKA, A*ASH. SHOA
G. PAoLlAMt 1940
SI02
TI02
AL2O3
FE203
FEO
MNO
CAO
NA20
K2U
P205
H20 +
H20-
CO2
S03
TOTAL
ANALYSIS
72.ee
0.00
10.12
6.15
1.09
0.00
.64
6.00
2.f4
0.00
.42
0.00
0.00
0.00
u.oo0.00
0.00
0.00
100.38
!iATER-C02-FK?E
(100.0)
72.91
0.00
10.12
6.15
1.09
0.00
.54
.64
6.00
2.54
0.00
SI
TlAL
Ft3
FE2
MN
M6
CA
NA
<
P
H?
H-
CS
ATOMS
WEIGHT
34.05
0.00
5.35
4.30
.85
0.00
.33
.46
4.45
2.11
0.00
.00
0.00
0.00
0.00
ATOMS
NUMBERS I 100.0)
25.36
0.00
4.15
1.61
.32
0.00
.28
.24
4.05
1.13
0.00
0
CT
OR
AF)
AN
NE
LC
AC
NSDI
woHY
OL
MT
H'^
ILTI
RU
AP
CC
MjO/MCiOtFKO
IN FEI,ICb' =
'HEIGHT KOPM
(100.0)
29.50
0.00
15.06
37.91
0.00
o.co
0.00
11.46
0.00
2.51
0.00
.35
0.00
3.20
0.00
0.00
0.00
0.00
0.00
0.00
.91
NON-OX I DMT I ON NORM
<FE2O3 COHVEKTED TO FEO)
29.31
0.00
15.24
38.37
0.00
0.00
0.00
0.00
3.06
2.82
o.oo
11.20
0.00
0.00
0.00
0.00
0.00
0.00
0.00
o.oo
.14
TI
/FM
3-COMPONENT
WT.PERCENTS
F 44.36
M 3.31
A 52.33
F 44.09
C 3.90
A 52.01
N 65.36
K 27.67
C 6.97
1159
VITRIC wtLt)tL> TUFF
08.57U 39.45E* h
0. HIEKt, 1941
j ILO-"fcTAHARA RAILwAy, SHuA
SIU2
T1O2
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
SO 3
CL
F
TOTAL
ORIGINAL
ANALYSIS
67.96
.46
7.04
7.73
1.32
.22
.88
2.00
7.04
4.77
0.00
.21
.20
0.00
0.00
.20
.05
0.00
0.00
100.08
hATER-C02-FREE
(100.0)
68.36
.46
7.08
7.78
1.33
.22
.89
2.01
7.08
4.80
0.00
SITl
ALFt3
FE2MN
MtCA
NA
-It
H-
ATOMS
WEIGHT
31.75
.28
3.72
5.41
1.03
.17
.53
1.43
5.22
3.96
0.00
.00
.00
0.00
0.00
ATOMS
NUhRERS (100.0)
24.31
.12
2.97
2.08
.40
.07
.47
.77
4.89
2.18
0.00
0
o.\OR
ARAN
NELC
ACNS
DI
WOHY
OL^T
HM
ILTI
R1JAP
CC
MGO/MGO+HEO
IN FL>,ICS =
ULlGHT MORii
(100.0)
24.24
0.00
28.42
9.65
0.00
0.00
0.00
22.55
S.77
8.26
0.00
.22
0.00
0.00
0.00
.88
0.00
0.00
0.00
0.00
.58
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
28.18
0.00
28.86
9.80
0.00
0.00
0.00
0.00
11.91
8.86
0.00
11.52
0.00
0.00
0.00
.89
0.00
0.00
0.00
0.00
.18
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
az
276
16.t)
34.3
8.7
40.2
.31
.16
1.4
0.00
.25
85
3-C0MP0NENT
WT.PERCENTS
F 41.63
M 4.05
A 54.32
F 39.59C 8.75
A 51.66
N 50.98K 34.54
C 14.4H
No. 1159
REMARKS: P2O5 absent.
MINERALOGY: Phenocrysts: Anorthoclase, zoned
aegirine-augite, cossyrite. Groundmass: Spherulitic
and fluidal glass, rare magnetite, fragments of trachy-
andesite (bearing augite with arfvedsonite rims) and
trachyrhyolite.
No. 1160
REMARKS: P^ trace.
MINERALOGY: Phenocrysts: Micro-phenocrysts of
anorthoclase and aegirine-augite. Groundmass: Finely
vesicular glass, feldspathic microlites, cossyrite.
OTHER INFORMATION: Occurs as schlieren in 1159.
No. 1161
MINERALOGY: Ophitic texture: zoned labradorite and
titanaugite, both in large crystals. Common limonitised
magnetite.
OTHER INFORMATION: Occurs in a laccolith, where this
rock-type grades into orthoclase gabbro (see 1164).
1160
PANTELLERITIC OtiSlDlAN (FKOM rtlTHlN TUFF 1159)
08.57N 39.45E, MALKA JILO-KETAHARA RAILWAY* SHOA
0. HIEKE. 1941
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA2O
K2U
P2O5
H2O*
H2U-
CO2SO3
OL.
F
TOTAL
ANALYSIS
68.00
.38
7.38
3.98
4.55
.24
.75
2.04
7.83
4.73
0.00
.13
.10
0.00
0.00
? 24
.13
0.00
0.00
100.48
WATER-C02-FKEE
(100.0)
68.08
.38
7.39
3.98
7.84
4.74
0.00
SITI
Al_
Ft3
Ft2MN
MbCA
NA
KP
H +
H-
C
5
ATOMS
WEIGHT
31.77
.23
3.90
2.78
3.54
.19
.45
1.46
5.81
3.93
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.22
.10
3.10
1.07
1.36
.07
.40
.78
5.41
2.15
0.00
0crc
ORAB
ANNE
LCAC
NS01
WOHY
OL
MTHH
ILTI
P'J
APCC
MGO/MGO+F-tO
IN FLMICS =
KtlCiHT NORM
(100.0)
24.03
0.00
28.06
11.58
0.00
0.00
0.00
11. *>b
9.73
8.79
0.00
5.53
0.00
0.00
0.00
.72
0.00
0.00
0.00
0.00
.23
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
26.030.00
28.27
11.670.00
0.00
0.000.00
12.888.96
0.00
11.460.00
0.00
0.00
.730.00
0.000.00
0.00
.15
SIAL
FMC
ALK
KMG
TI
P
C/FM
uz
268
17.2
32.2
8.7
42.0
.28
.14
1.1
0.00
.2775
3-COMPONENT
WT.PERCENTS
F 39.06
M 3.43
A 57.51
F 36.88C 8.8?
A 54.30
C
U.I.
53.6332.40
13.97
1161
COARSL UASALT (GABtlRD)
13.10M 39.HE. MAUL. MAJ FARASH.
F. ROUOLICO, R. PltRUCCIM, 1942
SI02
TIU2
AU203
FE203
FEOMNO
MGOCAO
NA20K20
P2O5
H20*
H20-
C02
S03
TOTAL
OklGINAt
ANALYSIS
4b.04
2.96
14.78
4.95
8.47
.15
5.11
10.94
3.27
2.16
.32
1.51
.81
0.00
0.00
0.00
0.00
0.00
0.00
100.47
HATER-C02-FKEE(100.0)
15.065.04
8.63
.155.21
11.15
3.332.20
.33
SITI
ALFE3
FtZ
MNMG
CA
NA<
PH*
H-C
S
ATOMS
WEIGHT
21.04
1.77
7.82
3.46
6.58
.123.08
7.82
2.43
1.79
.14
.02
.01
0.00
0.00
ATOMS
NUrtBERS (100.0)
17.15
.85
6.63
1.42
2.70
.05
2.91
4.47
2.42
1.05
.10
0
CROR
AB
ANNE
LCAC
NSDI
WOHY
OL
MTHM
ILTI
RUAP
CC
MGU/MGO + f-EO
lu FkhlCS =
fctlGHT NOWI?
(100.0)
0.00
0.00
13.03
13.06
19.58
8.22
0.00
0.00
0.00
27.51
0.00
0.00
4.F3
7.33
0.00
5.72
0.00
0.00
.71
0.00
.71
NON-OXIDATIUN NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
13.16
7.32
19.78
11. 48
0.00
0.00
0.00
28.68
0.00
0.00
13.09
0.00
0.00
5.78o.oo
0.00
.72
0.00
.48
C/FM
QZ
10320.0
3-COMPONENT
WT.PERCENTS
F 56.01
M 71.33
A 22.66
F 45.05
C 36.72
A 18.23
N 19.9R
K 13.19
C 66.83
1162
OLIVlHE BASALT i;VKfc'
13.0*1% 39.01E. FEP'AXOA. TICRAY
F. ROOOLICO. H. V'ltRUCClNl, 1942
SIu2
TI02
AL2O3
FE203
FEU
MNU
KGO
CAD
NA20
K2U
P2U5
H20*
H20-
C02
503
TOTAL
ORI&IliAi.
ANALYSIS
45.38
1.83
13.79
3.99
S.47
.10
8.38
11.70
2.21
2.07
.41
1.P5
? <>7
0.00
O.CO
0.00
0.00
0.00
0.00
100.65
WATER-C02-FREE
(100.0)
46.15
1.86
14.02
4.06
8.61
.10
8.52
11.90
2.25
2.11
.42
SITl
AL
Ft3
FE.2
MN
MGCA
NAK
P
H*
H-C
S
0
ATOMS
WEIGHT
21.20
1.10
7.30
2.79
6.58
.08
5.05
8.36
1.64
1.72
.18
.02
.01
0.00
0.00
44.62
AT0M5
NUMBERS (100.0)
17.15
.52
6.1'
1.1'
2.6i
.0
4.7
4.7'
1.6<
1.00
.13
60.12
0.00
0.00
12.47
9.52
21.92
5.17
0.00
0.00
0.00
26.08
0.00
O.CO
12.52
5.90
0.00
3.53
0.00
O.00
flORM
(100.0)
If-. FullS -
NON-OXIDATION NORM
(HE2O3 CONVERTED TO FEO)
0.00
0.00
12.56
4.88
22.09
7.76
0.00
0.00
0.00
28.89
0.00
0.00
19.34
0.00
0.00
3.56
0.00
0.00
? 92
0.00
.60
c
ALK
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 49.60
M 33.36
A 17.04
F 43.HI
C 41.14
A 15.05
N 13.83
K 12.95
C 73.22
No. 1162
MINERALOGY: Ophitic diabasic texture. G.roundmass:
Zoned An.70 (center) to An45 (rim); abundant titanaugite;
abundant magnetite, also as inclusions in plagioclase;
talc-chlorite after olivine.
No. 1163
REMARKS: Published summation is 100.96.
MINERALOGY: Aphanitic, semi-ophitic texture.
Groundmass: An65, titanaugite, fresh olivine (large
negative optic angle) all in equal abundance; much
magnetite, minute apatite.
No. 1164
REMARKS: CO2 trace. Highly potassic rock.
MINERALOGY: Medium-grained, ophitic texture.
Groundmass: Fresh An65-70, Sericitised orthoclase,
abundant augite; rare biotite, apatite, magnetite, ilmenite,
pyrite; cavities with quartz and calcite.
OTHER INFORMATION: Occurs in laccolith, where it
grades into rock-type 1161.
1163
OLIVINE BASALT DYK.L
13.0711 39.05E, SESSEUA, A^ATILA FORT, W. OF SA.iRE. TIGftAY
F. ROOOLICO, R. PItRUCCiNt, 1<J42
SI02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ANALYSIS
46.02
1.97
18.OR
2.87
9.76
.14
4.68
12.40
2.74
1.52
.26
.33
.14
0.00
0.00
0.00
0.00
0.00
0.00
100.91
WATEH-CO2-FKEE
(100.0)
45.82
1.96
18.00
2.86
9.72
.14
4.66
12.35
2.73
1.51
.26
SITI
AL
FL3
Ft2
MN
M6
CA
NA
K
P
H*
H-C
S
ATOMS
?EIGHT
21.50
1.18
9.57
2.01
7.59
.11
2.82
8.86
2.03
1.26
.11
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.03
7
3
2
4
1
55
89
80
03
04
59
92
97
72
08
0
CB
OH
AO
AN
NE
LC
AC
NS
DI
MO
HY
OL
MT
ILTI
RU
AP
CC
MGO/MGO+KEO
IN FEMICS i
WEIGHT NORM
(100.0)
0.00
0.00
8.96
11.86
32.36
6.10
0.00
0.00
0.00
22.?0
0.00
0.00
9.47
4.15
0.00
3.72
0.00
0.00
.57
0.00
.55
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
9.01
8.62
32.54
7.93
0.00
0.00
0.00
23.26
0.00
0.00
14.34
0.00
0.00
3.74
0.00
0.00
.57
0.00
.44
C/FM
OZ
3-C0MP0NENT
WT.PERCENTS
F 58.55
M 21.70
A 19.75
F 43.12C 42.34
A 14.54
N 16.45
K 9.12
C 74.43
1164
ORTHOCLASE bAB
13.ION 39.11E.
F. ROiX>Ll(.O, R
MAI FARASm n. OF SAMREi
ItRUCCI'jI, 1942
5102
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAU
NA20
<20
P2O5
H20+
H20-
C02
S03S
-0
TOTAL
ANALYSIS
46.13
2.07
IB.54
1.53
6.32
.09
7.43
5.76
1.75
6.17
.57
2.P6
? 74
0.00
0.00
.33o.no
0.00
-.16
100.13
TER-C02-ctftE
(100.0)
.87
.15
.24
.59
.56
.09
.71
.98
.62
.40
.59
SI
Tl
AL
FE3
FL2
Mil
Ml)
CA
NA
K
P
H +
H-
C
s
ATOMS
?EIGHT
21.55
1.24
9.81
1.07
4.91
.07
4.48
4.12
1.30
5.12
.25
.03
.01
0.00
0.00
ATOMS
NUnfltHS (100.0)
17.43
.59
8.26
? 44
2.00
.03
4.19
2.33
1.28
2.98
.18
WEIGHT NORM
(100.0)
0.00
0.00
37.932.28
25.387.11
0.000.00
o.oo
.690.00
0.0018.94
2.310.00
4.OH0.00
0.001.29
0.00
let FtMCv = .77
NON-OXIDATION NORM
(FE2O3 cONVFKTEr TO FEO)
0.00
0.00
38.04
.45
25.45
8.12
0.00
0.00
0.00
.70
0.00
0.00
21.84
0.00
0.00
4.09
0.00
0.00
1.30
0.00
.70
SI
AL
FM
C
ALK
3-COMPONLNT
WT.PtRCENTS
F 33.84
M 32.03
A 34.14
F 36.46
C 26.75A 36.79
N I?.79K 45.10
C 42.11
1165
OLlVlNE BASALT (LACCOLIT rARclN)
13.12IM 39.22E, ADI GULAaUL. E. OF SAMRL, TIuRAY
F. RODOLICO, K. PIERUCCIMI, 1942
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2U
P2O5
H2O+
H2O-
C02
SO3
TOTAL
ORIOINAL
ANALYSIS
46.89
1.2ft
12.63
1.67
9.52
.10
U.P7
11.04
2.18
1.75
? 2B
.89
.33
0.00
0.00
0.00
0.00
0.00
0.00
100.43
i?ATER-C02-FREE
(100.0)
47.26
1.29
12.73
1.68
9.60
.10
11.96
11.13
2.20
1.76
.28
SITl
ALFt3
FE2MN
MGCA
NAK
PH*
H-C
S
0
ATOMS
(.EIGHT
21.91
.77
6.68
1.17
7.40
.08
7.16
7.89
1.62
1.4!i
.12
.01
.00
0.00
0.00
44.17
ATOMS
NUMBERS (100.0
17.38
5
2
6
4
1
36
5247
96
03
57
39
57
R3
09
59. 86
0
CE(OP
ABAN
NFLC
ACNS
DI
WO
HYOL
MT
HMIL
TIRU
APcc
MGO/MGO+FEO
IN FEHICS =
WtlGHT NORM
(1OO.0)
0.00
0.00
10.44
9.75
19.63
4.81
0.00
0.00
0.00
27.52
0.00
0.00
22.3*
2.45
0.00
2.45
0.00
0.00
.62
0.00
.73
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
10.48
7.83
19.69
5.88
0.00
0.00
0.00
27.80
0.00
0.00
25.24
0.00
0.00
2.46
0.00
0.00
.62
0.00
.68
NIGGLI
SIAL
FM
CALK
K
MGTI
P
C/FM
QZ
94
15.
54.
23.
6.
1.
-32
3-COMPONENT
WT.PERCENTS
U.46
13.9H
14.56
2.7R
2.20
15.0?
14.56
11.69
73.75
NO. 1165
MINERALOGY: Black, fine-grained, ophitic rock.
Groundmass: Poorly zoned An58-55 (very rarely
phenocrysts), abundant large augite, small green olivines,
common large magnetite, rare limonite and apatite.
OTHER INFORMATION: Occurs at margin of large
laccolith.
No. 1166
MINERALOGY: Fine-grained. Phenocrysts: Micro-
phenocrysts of zoned An70 (center) - An35 (rim).
Groundmass: Labradorite; fresh olivine (large negative
optic angle) with incipient alteration, diopside-augite
as common as olivine; rare biotite associated with
magnetite (coarse-grained); rare apatite.
No. 1167
REMARKS: Published summation is 100.33. CI trace.
MINERALOGY: Very fine-grained, aphanitic, grey rock.
Groundmass: Flow-texture; orthoclase (also some pheno-
crysts) and slightly subordinate nepheline, rather
uncommon aegirine-augite with aegirine rims, rare
muscovite (katapleite?); no observed sodalite, lavenite,
or wohlerite.
OTHER INFORMATION: Specific gravity 2.57. This
rock-unit has flowed out on the Antalo Limestone.
1166
OLlVlNE BASALT (INTRUSIVE)
13.3ON 39.33E, MT. OUIHA,
F. ROUOLICO, R. PIERUCCIMi
E. OF OUIHA, TlGRAY
SI 02
TIOZ
AL2O3
FE2O3
FEO
MNO
MGU
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
47.25
2.57
11.39
4.99
12.03
.13
5.66
9.60
3.19
2.35
.63
.83
.34
0.00
0.00
0.00
0.00
0.00
0.00
100.96
WATER-C02-FREE
(100.0)
47.35
2.58
11.41
5.00
12.06
.13
5.67
9.62
3.20
2.35
.63
SITl
ALF?3
FL2MN
M'o
CA
NAK
P
H +
H-C
S
ATOMS
WEIGHT
22.08
1.54
6.03
3.49
9.35
.10
3.41
6.86
2.37
1.95
.27
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
17.69
5
1
3
3
3
2
1
73
08
42
82
04
20
90
34
14
20
0
CBOR
AB
ANNE
LCAC
NS
DI
WO
HY
OLMT
H'-1
IL
TIR:J
At'
CC
MGO/MGO+FE0
IN FtMICS =
WEIGHT NORM
(100.0)
0.00
0.00
13.94
20.21
9.79
3.73
0.00
0.00
0.00
28.38
0.00
0.00
10.41
7.26
0.00
4.89
0.00
0.00
1.38
0.00
.57
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
14.08
14.59
9.89
6.91
0.00
0.00
0.00
29.24
0.00
o.oo
18.95
0.00
0.00
4.93
0.00
0,00
1.39
0.00
.42
C/FM
UZ
3-COMPONENT
WT.PERCENTS
F 60.31
M 20.06
A 19.63
F 52.9?C 29.85
A 17.23
N 21.07K 15.52
C 63.41
1167
T1NGUAITE
I3.26N 39.09E, IXJrtoANI pASS,
F. RODOLICO, R. PIERUCCINI, 19<,
SA.MftE-ABfil AD01 ROAD, TlGRAy
SI 02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20 +
H20-
C02
S03
TOTAL
OKItlNAL
ANALYSIS
59.92
.30
16.73
3.33
.43
.18
.57
1.58
9.26
6.35
.03
1.18.11
0.00
.33
0.00
0.00
o.oo0.00
100.30
WATER-C02-FKEE
60.72
.30
16.95
3.37
? 44
.18
.58
1.60
9.38
6.43
.03
(100.0)
SITI
ALFL3
FL2MN
MG
CA
NA<
P
H.H-
Cs
ATOMS
WEIGHT
27.99
.18
8.85
2.33
.33
.14
.34
1.13
6.87
5.27
.01
.01
.00
0.00
.13
ATOMS
NUMBERS (100.0)
21.28
.08
7.00
.89
.13
.05
.30
.60
6.38
2.88
.01
0
CB
OR
AB
ANNF.
LCAC
NSDI
woHY
OLMT
HMIL
TlRU
APCC
MGO/MGO*FEO
IN FEHICS =
WEIGHT NORM
(100.0)
0.00
0.00
38.12
31.25
0.00
10.e7
0.00
9.79
4.00
4.32
1.02
0.00
o.oo0.00
0.00
.58
0.00
0.00
.07
0.00
. .75
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
38.37
36.75
0.00
8.07
0.00
0.00
6.62
6.76
0.00
0.00
2.78
0.00
0.00
.58
0.00
0.00
.07
0.00
.25
C/FM
OZ
210
34.6
13.6
3-COMPONENT
WT.PERCENTS
F 18.86
53.87
36.94
9.19
1168BASALT
09.0AH 35.2?E?P. COMUCCI, 1948 KARTA-<FLLA CONFLUENCE, WOLLEGA
5IU2
TI02
AL203
FE2O3
FEOMNU
MGOCAU
NA20
K20
P2O5H20*
H20-
C02
S03
TOTAL
OK 101HALA/iALYSIS
46.18
3.07
13.12
4.26
10.33.19
5.73a.07
3.362.10
.64
2.29.90
0.000.00
0.00
0.00
0.00
0.00
100.24
WATER-C02-FKEE
47.58
3.16
13.52
4.39
10.b4.20
5.908.32
3.462.16
.66
(100.0)
SI
Tl
AL
Ffc3
Ft2MN
MOCA
NAK
PH?
H-
Cs
0
ATOMSHEIGHT
21.58
1.84
6.94
2.98
8.03.15
3.465.77
2.491.74
.28.03
.01
0.000.00
44.95
ATOMSNUMRERS (100.0)
17.76.89
5.95
1.23
3.33.06
3.293.33
2.511.03
.21
60.42
0C'i
OR
An
AN
NE
LC
ACNS
DIWO
HYOL
??T
H*'
ILT!
RJ
*??>
CC
MTiU/MOO-f 1-i.U
IH FtMlCS =
?.EIGHT riORM
(100.0)
0.00
0.00
12.P1
25.78
14.91
1.930.00
0.00
0.00
18.48
0.00
0.00
12.26
6.38
0.00
b.00
0.00
0.00
1.440.00
.64
MON-OXlDATION NOhM(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.92
20.90
15.03
4.710.00
0.00
0.00
19.05
0.00
0.00
19.88
0.00
0.00
6.05
0.00
0.00
0.00
.48
NIGGL1
SI
AL
FM
C
ALK
KMG
TI
PC/FM
oz
111
18.
49.20.
11.
5.
-33
3-COMPONFNTWT.PERCENTS
F 56.59
M 22.23
A 21.IR
F 51.BH
C 28.70A 19.47
N 24.83K 15.52
C 59.6i
NO. 1168
MINERALOGY: Holocrystalline. Groundmass: An42,
titanaugite, fresh olivine, magnetite.
No. 1169
REMARKS: P2?5 trace- A Potassic rock.
MINERALOGY: Vetrose base. Phenocrysts: An60-65.
Groundmass: Plagioclase, iddingsitised olivine, rare
brown augite.
No. 1170
MINERALOGY: Flow-texture. Groundmass: Sanidine,
aegirine-augite, magnetite, calcite.
OTHER INFORMATION: Possibly a welded tuff.
1169
P0RPHYR1T1C TRACHYUA'ALT
09.01N 36.32E, SUVfMT OF TULU DA*
P. COMUCC1. 1948
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGUCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
OKlfclNAL
ANALYSIS
50.24
2.39
16.12
11.14
1.43
.06
.32
>.6O
.26
>.5O
).00
.99
.52
.00
.00
.00
.00
.00
.00
100.57
V.ATER-C02-FKEE
(100.0)
51.76
2.46
16.61
11.48
1.47
.06
2.39
5.77
2.33
5.67
0.00
SITl
AL
Ft3
FE2HN
MGCA
NAK
PH?
H-C
s
ATOMS
WEIGHT
23.47
1.43
8.53
7.79
1.11
.05
1.40
4.00
1.68
4.57
0.00
.02
.02
0.00
0.00
ATOMS
NUMBERS (100.0)
19.OR
.68
7.22
3.19
.45
.02
1.32
2.28
1.67
2.67
0.00
0
enOR
A3
ANNE
LCAC
NS
01WO
HY
OLMT
ILTI
RUAP
CC
MGO/MG0.FE0
IN FEMlCS =
fcElGHT NORM
(100.0)
3.29
0.00
33.56
19.74
18.07
0.00
0.00
0.00
0.00
6.23
0.00
3.08
0.00
0.00
11.50
3.25
1.28
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
34.31
19.62
18.47
.31
0.00
0.00
0.00
9.27
0.00
0.00
13.23
0.00
0.00
4.78
0.00
0.00
0.00
0.00
.33
ALFM
C
ALKK
MGTI
P
C/FM
OZ
27.7
38.1
17.5
16.6
.62
.26
5.2
0.00
.46-20
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
N
K.
C
55.50
10.24
34.26
48.48
21.60
29.93
16.9?
41.17
41.92
1170
TRACHYANOtSITE
09.30N 35.34E, MT. KATTA
P. C0MUCC1. 194B
SIU2
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
ORIGINAL
ANALYSIS
53.31
1.10
16.98
>.5O
i.ee
.27
.37
1.90
..91
1.21
.47
.40
.56
.11
).00
).00
).00
ftATER-C02-F?tE
(100.0)
55.59
1.15
17.71
5.74
4.05
.28
2.47
4,07
5,12
3.35
.49
SITI
ALFt3
FE2
MN
Mfci
CA
NAK
P
ATOMS
wEI&HT
24.91
.66
8.98
3.85
3.02
.21
1.43
2.79
3.64
2.66
.21
ATOMS
NUMBERS (100.0
19.95
.31
7.49
1.55
1.22
.09
1.32
1.56
3.56
1.53
.15
0
OR
AR
ANNE
LCAC
NSDI
woHY
OLMT
IL
TIRU
AP
CC
MGO/MGOVhCO
IN FEI-UCS =
WEIGHT NOWM
(100.0)
1.64
0.00
19.81
43.37
15.36
0.00
0.00
0.00
0.00
.98
o.oo7.02
0.00
8.33
0.00
2.17
0.00
0.00
1.07
.8*
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
20.02
43.85
15.53
0.00
0.00
0.00
0.00
1.06
0.00
2.53
13.46
0.00
0.00
2.20
0.00
0.00
1.08
.26
.36
C/Frt
OZ
165
31
3-COhPONENT
WT.PERCENTS
F 47.21
M 11.93
A 40.87
F 43.83
C 1R.22A 37.94
N 40,85
K 26.71
C 32.45
1171
TRACHYANDES1TE
09.3011 35.34E,
P. COMUCCI, 194
HT. KATTA JORGA, WOLLEGA
SIU2
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
54.22
.92
18.90
2.89
5.02
.22
1.80
4.80
4.11
4.17
.50
1.87
.42
.12
0.00
0.00
0.00
0.00
0.00
99.96
kATtR-C02-FREE
55.58
.94
19.37
2.96
5.15
.23
1.85
4.92
4.21
4.27
.51
(100.0)
SITl
ALFt3
Ft2MN
MiCA
NA<
PH*
H-C
s
ATOMS
WEIGHT
25.33
.55
10.00
2.02
3.90
.17
1.09
3.43
3.05
3.46
.22
.02
.00
.03
0.00
ATOMS
NUMBERS (100.0)
19.94
.25
8.19
.80
1.55
.07
.99
1.69
2.93
1.96
.16
0CB
ORAB
ANNE
LCAC
NSDI
MOHY
OLMT
HWIL
TIRU
AP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
.20
.22
25.29
35.69
20.65
0.00
0.00
0.00
0.00
0.00
0.00
10.47
0.00
4.30
0.00
1.79
0.00
0.00
1.12
.28
.51
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
.22
25.44
35.89
20.76
0.00
0.00
0.00
0.00
0.00
0.00
5.50
8.99
0.00
0.00
1.80
0.00
0.00
1.13
.28
.32
NIGGLI
SIAL
FM
CALK
KMG
TI
P
C/FM
QZ
168
34.6
28.H
16.0
20.7
.4
.2
2.1
.6
.5-15
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
43.97
10.01
46.03
37.68
22.87
39.45
31.4?
31. 8H
36.70
No. 1171
MINERALOGY: Flow-texture. Groundmass: Sanidine
(An40?), aegirine-augite, large magnetite octahedra,
rare calcite.
OTHER INFORMATION: Possibly a welded tuff.
No. 1172
MINERALOGY: Groundmass: K-feldspar, nepheline,
aegirine, rare magnetite.
No. 1173
MINERALOGY: Vetrose base. Phenocrysts: Sanidine.
Groundmass: Glass with some feldspar, aegirine,
magnetite.
1172
BOSTONITE DYKE
08.46N 35.52E,
P. COMUCCI, 1948
BASE OF SUMMIT PYRAMID. TULU JEHGO, WOULEGA
5102
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
59.70
.20
17.14
5.87
1.29
.17
.09
1.00
7.36
5.B2
.09
1.12
.42
0.00
0.00
0.00
0.00
0.00
0.00
100.27
WATER-C02-FKEE(100.0)
60
17
5
1
1
7
5
47
20
36
95
31
17
09
01
45
89
09
SITI
AL
F?3
FE2
MN
MG
CA
NA
K
P
H*
H-
Cs
ATOMS
WEIGHT
27.89
.12
9.07
4.11
1.00
.13
.05
.71
5.46
4.83
.04
.01
.00
0.00
0.00
ATOMSNUMBERS (100.0
21.40
7
1
5
2
05
24
59
39
05
05
38
12
66
03
0
CB
OR
AB
AN
NE
LC
AC
NSDI
WO
HY
OL
MT
H*l
IL
TI
R'J
AP
CC
MGO/MGO+FEO
IN FLMICb =
WEIGHT MORM
(100.0)
0.00
0.00
34.92
45.03
0.00
6.17
0.00
6.00
0.00
.49
1.62
0.00
0.00
4.20
.99
.38
0.00
0.00
.20
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
35.32
44.13
0.00
7.00
0.00
0.00
1.60
4.05
0.00
0.00
7.30
0.00
0.00
.39
0.00
0.00
.20
0.00
.03
SI
AL
FM
C
ALK
214
36.3
20. H
3.9
39.1
3-COMPONENT
WT.PERCEMS
F 35.05
51.90
41.04
7.05
1173
ALKALINE TRACHYTf.
08.51N 35.50E. BUBE.
P. COMUCCI, 1948
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAU
NA20
K20
P205
H2G +
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
59.96
.50
16.55
3.43
2.55
.20
.55
1.60
6.19
6. 69
.11
1.34
.74
0.00
0.00
0.00
o.ooo.oo
0.00
100.41
wATER-C02-FfiEE
(100.0)
60.98
.51
16.63
3.49
2.59
.20
.56
1.63
6.30
6.80
.11
51TI
AL
FE3
FE2
MN
MG
CA
NA
K
P
Ht
H-
C
S
ATOMS
WEIGHT
28.01.30
8.76
2.40
1.98
.15
.33
1.14
4.59
5.55
.05
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
21.62
7
4
3
14
03
93
77
06
30
62
33
08
03
0
CR
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM"IL
TIRU
AP
CC
MfiO/MGOtFEO
IN FEHICS =
KL-IGHT NORM
(100.0)
0.00
0.00
40.31
39.42
0.00
4.98
0.00
4.?0
0.00
6.28
0.00
0.00
.63
2.96
0.00
.97
0.00
0.00
.24
0.00
.41
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
40.58
39.84
0.00
4.93
0.00
0.00
1.12
6.54
0.00
0.00
5.78
0.00
0.00
.97
0.00o.oo
.25
0.00
.16
SI
AL
FM
C
ALK
218
35
20
6
37
3-COMPONENT
WT.PERCENTS
F 30.81
29.23
7.8?
A?.95
42.75
46.20
11.05
1174
POSTONITE DYKE
08.45n 35.51E, SUMMIT OF TULU JERoO, WOLLEGA
P. COMUCCU 1948
SIU2
T1O2
AL2O3
FE2O3FEU
MNO
MGOCAO
N42O
K2u
P2U5
H2O*
H2O-
CO2SO3
TnTAL
ORIGINAL
ANALYSIS.
60.CR
.10
16.47
5.05
1.22
.16
.16
1.45
S.90
6.96
.07
1.P9
1.00
o.co0.00
0.00
0.00
0.00
0.00
100.53
WATER-CO2-FHEE
(100.0)
61.53
.10 1
16.87 /
>In
VL
5.17 FE3
1.25 Ft2
.16 MU
.IS Mi
1.49 CA
6.04 NA
7.13 *
.07 f
1+
3
ATOMS
HEIGHT
28.07
.06
8.71
3.53
.95
.12
.11
1.04
4.38
5.78
.03
.02
.01
0.00
0.00
47.72
ATOMS
NUMBERS (100.0)
21.82
.03
7.05
1.38
.37
.05
.10
.56
4.16
3.23
.02
61.24
WtlGHT '<OKM
(100.0)
0.000.00
42.23
42.830.00
2.26
0.00
3.74
0.00
.Q9
2.37
0.00
0.00
4.26
.94
0.00
0.00
.16
0.00
IN Flli'Itb = 1.00
NON-OXIDATION NORM
(FE203 CONVEKTEO TO FEO)
0.00
0.00
42.65
40.03
0.00
4.03
0.00
0.00
1.00
6.23
0.00
0.00
5.71
0.00
0.00
.20
0.00
0,00
.16
0.00
C/FM
02
3-COMPONENT
WT.PERCENTS
F 32.47
M .91
A 66.60
f 30.47
C 7.OS
A 62.49
N 41.23
K 48.64
C 10.13
No. 1174
MINERALOGY: Holocrystalline, flow-textured.
Groundmass: Very dominant K-feldspar; nepheline,
aegirine, magnetite, chlorite.
No. 1175
REMARKS: F2C>5 trace.
MINERALOGY: Phenocrysts: Sanidine. Groundmass:
Dominant alkali feldspar; some sodic plagioclase,
arfvedsonite; rare quartz, muscovite, epidote,
barkevikite(?).
OTHER INFORMATION: Imprecise locality.
No. 1176
REMARKS: Published summation is 100.41.
MINERALOGY: Abundant glass shows in H-O content.
Phenocrysts: Sanidine. Groundmass: Sanidine, sodic
plagioclase, green pyroxene, magnetite, all set in glass;
no quartz; spherulites bear calcite.
OTHER INFORMATION: Locality not identified.
1175
C0ME?4L)ITE
P. COMUCCI, 1946
1K> N. OF GORUCwiA, LEFT BANK BARG RIVERt ILUdAUOR
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
GRICINAi
AMALYSI:
63.50
.57
14.51
3.87
2.50
.12
.14
? 4H
b.36
5.41
0.00
.82
1.81
0.00
0.00
0.00
0.00
o.oo0.00
100.09
hATER-C02-FKtE(100.0)
5.550.00
SI
Tl
AL
FE3
Ft2
ATOMS
WEIGHT
29.67
ATOMS
NUMBERS (1G0.0)
0
CT
OR
ATAN
NELC
AC
NS
Dtwo
HYOL
MTHM
IL
TI
RU
AP
CC
KEIGHT IMC'I
(100.0)
5.60
0.00
32.89
45.f>2
0.00
0.00
0.00
8.57
0.00
2.15
0.00
2.3B
0.00
1.4B
0.00
1.11
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVF.KTED TO FEO)
6.11
0.00
33.14
45.97
0.00
0.00
0.00
0.00
2.28
2.19
0.00
9.18
0.00
0.00
0.00
1.12
0.00
0.00
0.00
0.00
MGO/MGO+FLO
IN FEMCb =
SI
AL
FM
TIP
C/FM
QZ
l.b
0.00
.10
17
3-COMPONENT
WT.PERCENTS
F 34.B5
51.92
44.16
1176
TRACHYRHYOLITt
P. COnUCCIi 194 8
i'O<A AND GAMALIt. cJARO VALLEY
SI02
TI02
AL2O3
FE203
FFO
MNO
MGO
CAO
NA2O
K2O
P2J5
H20*
H2O-
CO2
SOJ
THTAL
ANALYSI
64.48
.86
10. 2H
3.15
3.F8
.16
.78
2.16
3.13
5.24
.16
4.86
1.06
.11
0.00
0.00
0.00
0.00
0.00
100.31
*ATEK-CO;z-FKE.E
(100.0)
68.39
.91
10.90
3.34
4.12
.17
.83
2.29
3.32
5.56
? 17
SI
TIAL
Ft3
FE2
MNMG
CANA
K
P
ATOMS
WEIGHT
30.13
.52
5.44
2.20
3.02
.12
.47
1.54
2.32
4.35
? 07
ATOMS
NUCIBERS (100.0)
24.32
4
1
2
2
24
57
90
23
05
44
B7
29
52
05
0
enOR
AHAN
NF.
LC
AC
NSDI
wnHY
OLMT
HI
ILTI
AP
CC
IN FEhJCS =
WEIGHT NOkM
(100.0)
23.00
0.00
32.P9
25.05
U.CO
0.00
0.00
2.71
0.00
ti.18
0.00
2.30
0.00
3.49a.oo
1.73
0.00
0.00
.37
.27
.3"
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
21.02
0.00
33.11
25.21
0.00
0.00
0.00
0.00
.72
8.45
0.00
9.11
0.00
0.00
0.00
1.74
0.00
0.00
.37
.27
.19
FMC
ALKK
MG
TI
P
C/FM
QZ
31.9
10.7
29.5
.52
.17
3.0
.31
.33
84
3-COMPONENT
WT.PERCENTS
F 43.45
M 4.82
A 51.73
F 40.03
C 12.30A 47.67
N 29.72K 49.76
C 20.51
1177
GLASSY BASAL1
P. COMUCC] , 1950
SI02
TI02
AL2O3
FE203
FEO
MNU
MGO
CAU
NA20
KZU
P205
H20+
H20-
C02
S03
TOTAL
OHItlMAL
ANALYSIS
4
11
2.32
2.53
b.13
,.13
.21
? 17
b.99
3.98
L.40
L.25
3.00
1.88
'.52
).00
0.00
0.00
0.00
0.00
0.00
100.51
kATER-C02-FKEE
(100.0)
44.97
2.69
17.14
15.01
.22
.18
7.43
9.54
1.49
1.33
0.00
SI
TlAL
FE3FE2
MUMG
CA
NA
K
P
H*
H-
Cs
0
ATOMS
HEIGHT
19.77
1.52
8.53
9.88
.16
.13
4.22
6.42
1.04
1.04
0.00
.05
.03
0.00
0.00
47.72
ATOMS
NUMBERS (100.0)
16.65
.75
7.48
4.19
.07
.06
4.11
3.79
1.07
.63
0.00
61.22
0
CB
ORA?
ANNE
LC
ACNS
DI
MO
HY
OL
MT
HM
ILTI
RU
AP
CC
MGO/hGO+FEO
IiM FtMCS =
Wtl&HT MOl'M
(100.0)
3.68
0.00
7.87
12.61
36.14
0.00
0.00
0.00
0.00
2.74
0.00
17.26
0.00
0.00
15.04
.86
3.80
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
8.10
12.98
37.20
0.00
0.00
0.00
0.00
9.63
0.00
8.10
18.74
0.00
0.00
5.25
0.00
0.00
0.00
0.00
.57
NIGGLI
SIAL
FM
CALK
<MG
TIP
C/FM
OZ
99
22.
50.
22.
5.
4.
0.
-21
3-COMPONENT
WT.PERCENTS
59.80
29.15
11.05
55.22
34. 5R
10.20
12.04
10.75
77.21
NO. 1177
MINERALOGY: Groundmass: Dark brown glass, possible
fertile microlites, bands of fine vesicles.
OTHER INFORMATION: Locality not identified.
No. 1178
MINERALOGY: Highly scoriaceous rock. Groundmass:
Dark-brown glass, corroded Mg-rich olivine and augite
(augite crystallised after olivine), feldspar microlites.
OTHER INFORMATION: Young lava of Aden Series.
No. 1179
MINERALOGY: Phenocrysts: Olivine, rare brown
augite. Groundmass: Basic plagioclase, abundant
femics (olivine and augite(?), magnetite.
1178
GLASSY BASALT
11.55N 37.19E,
P. COMUCCI, 1950
OAGA ISLAND. LAKE TANA
SI02
TI02
AL2O3
FE2O3
FEU
MNO
MGO
CAO
NA20
K2J
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
43.42
2.11
13.01
10.74
3.49
.13
9.81
10.21
4.31
1.29
.50
.59
.62
0.00
0.00
0.00
0.00
0.00
0.00
100.43
V.ATER-C02-FREE
43.85
2.13
13.14
10.85
3.52
.13
9.91
10.31
4.35
1.30
.50
(100.0)
SITl
ALFE3
FE2MN
Mb
CANA
KP
H +
H-
Cs
ATOMS
WEIGHT
20.29
1.26
6.88
7.51
2.71
.10
5.92
7.30
3.20
1.07
.22
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
16.23
.59
5.73
3.03
1.09
.04
5.48
4.09
3.13
.62
.16
0CB
OR
ABAN
NELC
ACNS
DIWO
HY
OLMT
HI
ILTI
R'J
AP
CC
M60/MG0+FE0
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
7.71
13.00
12.41
12.94
0.00
0.00
0.00
27.92
0.00
0.00
8.25
5.64
6.98
4.04
0.00
0.00
1.10
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
7.88
3.44
12.67
18.54
0.00
0.00
0.00
30.06
0.00
0.00
22.15
0.00
0.00
4.13
0.00
0.00
1.13
0.00
.63
C/FM
QZ
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
48.01
33.10
18.89
47.37
33.99
18.64
27.2h
B.16
64. 5R
1179
OLlVlNE BASALT
12.32N 37.11E,
P. COMUCCI, 1950
CjOANG VALLEY, BE&HEMDEH
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
SOi
TOTAL
ORIGINAL
ANALYSIS
43.66
2.57
14.30
4.46
7.41
.14
8.69
9.80
3.02
3.07
.40
2.03
.59
0.00
0.00
0.00
0.00
0.00
0.00
100.34
MATER-C02-FHEE
(100.0)
44.68
2.63
14.63
4.56
7.58
.14
9.10
10.03
3.09
3.14
.41
SITI
AL
FE3FE2
MNMC
CA
NAK
P
ATOMS
WEIGHT
20.40
1
7
3
5
5
7
2
2
54
57
12
76
11
36
00
24
55
17
ATOMSNUMBERS (100.0)
16.57
6
1
2
5
3
2
1
73
40
28
36
05
04
99
22
49
13
WEIGHT NORM
(100.0)
0.00
0.00
Id.60
2.63
16.72
12.77
0.00
U.OO
0.00
24.50
0.00
0.00
12.26
6.63
0.00
4.99
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
13.14
0.00
16.87
14.32
4.41
0.00
0.00
25.38
0.00
0.00
19.94
0.00
0.00
5.03
0.00
0.00
ALFM
CALK
K
MG
18.0
49.1
22.5
10.5
.40
.58
3-COMPONENT
WT.PERCENTS
F 44.21
M 33.11
A 22.68
F 42.76C 35.30
A P1.94
N 19.01K 19.32
C 61.67
CC
MGO/MGG+FEO
IN FEKICS =
1180
PORPHYRITIC DOLE^ITIC BASALT
, GONDAR-DEtjAREK ROA0,
P. COMUCCI, 1950
SIU2
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NAiO
K2U
P2O5
H2O*
H2O-
SO3
ORlGI'iAL
ANALYSIS
44.43
1.16
14.27
8.28
3.49
WATER-CO2-FREE
(1OO.O)
48.29
1.26
15.51
9.00
3.79
.16
9.58
10.43
1.64
SI
TIAL
FE3FE2
MNMb
CANA
ATOMS
WEIGHT
20.76
.70
7.55
5.79
2.71
.12
5.31
6.86
1.12
ATOMS
NUMBERS (100.0)
17.65
.35
6.68
2.48
1.16
.05
5.23
4.09
1.16
.16
0.00
0.00
0.00
TOTAL
Q
CBOR
AftAN
NELC
ACNS
DI
WOHY
OLMT
H'X
ILTI
R'J
AP
CC
IN Ftr-iICS =
100.07
WEIGHT hOHM
(100.0)
4.54
0.00
2.00
13.91
33.93
0.00
0.00
0.00
0.00
13.96
0.00
17.42
0.00
9.13
2.72
2.39
0.00
0.00
0.00
0.00
1.00
NON-OX I DAT I ON NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
2.03
14.16
34.53
0.00
0.00
0.00
0.00
14.98
0.00
20.92
10.96
0.00
0.00
2.43
0.00
0.00
0.00
0.00
.63
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
UZ
104
19. 6
52.4
24.1
3.9
.12
.59
2.0
0.00
.46
-12
3-COMPONENT
MT,
FM
A
FC
A
NK
C
O.I.
.PERCENTS
52.54
39.33
8.13
50.75
41. 40
7.85
13.22
2.71
84.Oh
57.19
No. 1180
REMARKS: Very high water content.
MINERALOGY: Phenocrysts: Large An70, rare augite.
Groundmass: Medium grained, rare large vesicles;
An70(?), abundant augite; serpentinised olivine, glass;
magnetite.
No. 1181
REMARKS: Titaniferous, sub-aluminous.
MINERALOGY: Phenocrysts: Olivine showing resorbtion,
rare titanaugite. Groundmass: Feldspar, augite,
magnetite.
OTHER INFORMATION: Locality not identifiable.
No. 1182
MINERALOGY: Phenocrysts: Abundant fresh Mg-rich
olivine. Groundmass: Olivine, titanaugite, subordinate
plagioclase An55, glass, magnetite.
OTHER INFORMATION: Recent lava; locality not
identifiable. Analysis of scolecite from north of Danqual
hot springs (locality not identifiable): SiO? 45.40%,
A12O3 26.26%, total iron as Fe2O- 0.16%,
MgO 13.76%, Na2O 0.72%,
13.75%, summation 100. 23.
0.18%, total
1181
OLIVINE LASALT
11.2ON 37.34E,
P. COMUCCI. 1950
ARAGHlr LlnO nr,OJJA??
5102
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
OR It, IN A,
ANALYSIS
45.00
3.70
8.80
5.87
10.11
.16
10. R9
12.05
1.87
.73
0.00
.53
.<*8
0.00
0.00
0.00
0.00
0.00
0.00
100.19
?,ATER-cO2-FrtEE
(100.0)
45.37
3.73
8.87
5.92
10.19
.16
10.98
12.15
1.89
SITI
ALFt3
Ft2MN
Mt,CA
NA
ATOMS
WEIGHT
212
4
4
7
6
8
1
02
22
66
11
86
12
57
61
.39
ATOMS
NUKBERS (100.0
17.12
1.06
3.95
1.68
3.22
.05
6.18
4.91
1.38
0ce
ORA
1)AN
NELC
ACNS
DIWO
HY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO+FLO
Ii4 FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
4.36
15.98
13.55
0.00
0.00
0.00
0.00
37.43
0.00
1.59
11.42
B.60
0.00
7.08
0.00
0.00
0.00
0.00
.82
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.41
10.26
13.70
3.20
0.00
0.00
0.00
38.90
0.00
0.00
22.37
0.00
0.00
7.16
0.00
0.00
0.00
0.00
.62
MGTI
P
C/Fil
UZ
.56
5.6
0.00
.44
-28
3-COMPONENT
WT.PLRCENTS
F 54.22
52.17
39.34
8.49
12.76
4.9M
82.25
1182
SCORIACEObS PUKPHYRITIC > ASALT
, TULU 2UHA, (M.
P. C0.1UCC1 , 1950
OF DANGHILA) GOJJAM
SI02
TI02
AL2O3
FE203
FEU
MNU
MGU
CAO
NA20
K20
P205
H20*
H20-
COZ
S03
TOTAL
OKI&INAL
ANALYSIS
45.17
1.05
14.86
3.27
6.82
.12
12.53
11.06
2.38
2.05
.32
.42
.75
0.00
0.00
0.00
0.00
0.00
0.00
100.eo
WATER-C02-FHEE
(100.0)
45.34
1.05
14.92
3.28
6.85
.12
12.58
11.10
2.39
2.06
.32
SITI
ALFL3
FE2MN
MGCA
NAK
PH*
H-
C
S
AT0M5
WEIGHT
21.10
7
2
5
7
7
1
1
63
86
29
30
09
56
90
77
70
14
00
01
0.00
0.00
ATOMSNUMBERS (100.0)
16.57
.29
6.43
.90
2.10
.04
6.86
4.35
1.69
.96
.10
0cs
OR
ABAN
NELC
ACNS
DI
woHY
OL
MTHM
IL
TI
RU
AP
CC
MGO/MGOtFEO
I iM FEhlCS =
WEIGHT NORM
(100.0)
0.00
0.00
12.18
3.50
23.86
9.07
0.00
0.00
0.00
23.40
0.00
0.00
20.44
4.77
0.00
2.00
0.00
0.00
.70
0.00
.83
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
11.67
0.00
24.01
11.04
.46
0.00
0.00
24.00
0.00
0.00
26.11
0.00
0.00
2.01
0.00
0.00
.71
0.00
.72
C/FM
QZ
52.7
23.2
7.1
3-COMPONENT
WT.PERCENTS
F 37.30
M 46.37
A 16.38
F 39.44
C 43.24
A 17.3?
N 15.36
K 13.23
C 71.40
1183
DOLFRITIC BASALT
11.25N 36.58E,
P. COMUCCIi 19bO
SIO2
TIO2
AL2O3
FE2O3
FEO
MNU
CAO
NA2O
K2U
P2O5
H2O*
H2O-
CO2
S03
TOTAL
ORIGINAL
ANALYSIS
45.41
1.41
13.98
5.36
6.62
.14
8.93
9.38
1.29
.96
? 20
3.90
2.30
0.00
0.00
0.00
0.00
0.00
0.00
99.88
WATER-C02-FREE
(100.0)
48.47
1
14
5
7
9
10
1
1
51
92
72
07
15
53
01
38
02
21
SITI
ALFE3
FE2MN
M(j
CANA
KP
hUH-
Cs
0
ATOMS
WEIGHT
21.22
.85
7.40
3.75
5.15
.11
5.39
6.70
.96
.80
.09
.05
.03
0.00
0.00
47.41
ATOMS
NUMBERS (100.0
17.80
6
1
2
5
3
42
46
58
17
05
?3
94
98
4B
07
60.83
0
C3
ORAR
AMNE
LCAC
NSDI
WO
HY
OL
MT
HM
ILTI
RU
AP
CC
ltt FEMICS =
wtlGHT NORM
(1OO.0)
2.18
0.00
6.07
11.67
31.49
0.00
0.00
0.00
0.00
13.57
0.00
23.3R
0.00
b.31
0.00
2.R6
0.00
0.00
.47
0.00
.84
NON-OXIDATION NORM NIGGLI
(FE2O3 CONVERTED TO FEO)
0.00 3I
0.00 AL
6.14
11.80
31.84
0.00 I
0.00 ?
"M
^LK
IS
0.00 TI
0.00 P
14.15 C/FM
0.00 QZ
22.00
10.71
0.00
0.00
2.89
0.00
0.00
.47
0.00
.62
105
19.1
53.3
23.3
4.3
.33
.58
2.5
.20
.44
-12
3-COMPONENT
wT.PERCtNTS
FM
A
FC
A
NK
C
D.I.
51.73
38.56
9.72
50.74
39.73
9.53
11.09
8.25
80.65
57.29
NO. 1183
REMARKS: High water content.
MINERALOGY: Groundmass: Yellow-brown glass with
rare magnetite and rare vesicles, serpentinised olivine,.
augite, An70.
OTHER INFORMATION: Locality not identified.
No. 1184
MINERALOGY: Phenocrysts: Somewhat altered olivine.
Groundmass: Plagioclase, augite, olivine, magnetite.
OTHER INFORMATION: Locality not identified.
No. 1185
REMARKS: Sub-calcic-magnesic.
MINERALOGY: Extemely fine-grained rock. Ground-
mass: Abundant plagioclase, glass, augite, idding-
sitised olivine (occasional phenocrysts), magnetite.
11 84
OLIVINE BASALT
P. COMUCCI. 1950
SI 02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAD
NA2QK20
P2O5H2G+
H20-
C02S03
TOTAL
ORI&INAl
ANALYSIS
45.571.64
16.253.21
6.91
.16
9.1910.76
2.241.17
.12
1.691.00
0.000.00
0.000.00
0.00o.no
99.91
WATER-C02-FREE(100.0)
46.871.69
16.713.30
11.072.30
1.20
SITI
ALFt3
F?2MM
MGCA
NAK
P
H +
H-
Cs
ATOMS
WEIGHT
21.29
.98
8.602.25
5.37.12
5.547.69
1.66.97
.05
.02
.01
0.000.00
ATOMSNUMBERS (100.0)
17.13
.46
7.20
.91
2.1R
.05
5.164.34
1.63.56
.04
IN FEMICS -
WEIGHT NOPM(1OO.O)
0.000.00
7.1317.15
31.68
1.290.00
0.00
0.00IB.13
0.00
O.PO16.36
4.R00.00
3.200.00
0.00.27
0.00
NON-OXIDATION NORM(FE203 CONVEKTED TO FEO)
0.000.00
7.1713.43
31.88
3.370.00
0.00
0.0018.58
0.000.00
22.08
0.000.00
3.220.00
0.00.27
0.00
.67
SIAL
FMC
9920.?
47.925.0
3-COhPONENT
WT.PtRCENTS
F 44.54
M 40.45
A 15.01
F 41.66
C 44.30
A 14.04
N 15.81K 8.26
C 75.94
1185
APHYRIC BASALT
12.37IM 37.27E,
P. COMUCCI, 1950
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAU
NA20
K20
P205
H20 +
H20-
C02
S03
TOTAL
OftK-INAL
ANALYSIS
45.643.07
16.02
6.657.54
.18
4.767.39
4.242.38
.04
1.291.07
U.OO
0.000.00
0.000.00
0.00100.27
kATER-C02-FKEE(100.0)
7.70.18
4.86
SITI
ALFt3
FE.2
MN
Mlj
CANA
K
P
H +
H-C
s
ATOMSWEIGHT
21.321.84
8.484.65
5.86
.14
2.875.28
3.151.98
.02
.02
.01
0.00
0.00
ATOMSNUMBERS (100.0)
17.30
.88
7.161.90
2.40
.06
2.693.00
3.121.15
.01
0CR
OR
ABAN
NELC
ACN5
DIWO
HYOL
MTH!A
ILTI
RU
APCC
MGO/MG0*FEO
IN FEMICS -
WEIGHT NORM(100.0)
0.000.00
14.39
22.5217.97
7.690.00
o.ooo.oo
15.45U.OO
0.006.07
9.870.00
5.950.00
o.oo
.09
0.00
.81
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.000.00
14.58
14.8918.21
12.080.00
0.000.00
16.450.00
0.0017.67
0.000.00
6.030.00
o.oo
.09
0.00
.45
C/FM
QZ
19.113.6
3-COMPONENT
?IT.PERCENTS
F 55.49
M 18.62
A 25.?9
F 50.32
C 26.21
A 23.48
N 30.26
K 16.99
C 52.75
1186
GLASSY BASALT
U.OOiM 36.5SE.
P. COfiUCCl* 1950
SIU2
TI02
AL2O3
FE2O3
FEO
MNO
M60
CAO
NA20
K20
P205
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
45.77
1.58
16.05
3.63
7.12
.19
ti.34
10.29
3.65
2.21
? 39
.64
.48
0.00
0.00
0.00
0.00
0.00
0.00
100.34
WATER-C02-FREE
(100.0)
46.13
1.59
16.18
3.66
7.18
.19
8.41
10.37
3.66
2.23
.39
SI
TI
AL
F?3
FtZ
MN
Mi,
CA
NA
K
P
H*
H-
C
S
0
ATOMS
WEIGHT
21.38
.95
8.492.54
5.53.15
5.037.35
2.711.83
.17
.01
.01
0.000.00
44.19
ATOMS
NUMBERS (100.0)
16.43
.44
7.001.01
2.21
.06
4.604.08
2.621.04
.12
59.89
0
CB
OR
AP
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H"ri
IL
TI
RJ
AD
CC
MGG/MGO+HFG
I,i FLMCS =
WEIGHT riCiRK*
(100.0)
0.000.00
13.19B.91
20.9912.07
0.00
0.000.00
22.700.00
0.00
12.04S.32
0.003.02
0.000.00
.06
0.00
.7P
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.000.00
13.284.73
21.1414.45
0.00
0.000.00
23.350.00
0.00
19.140.00
0.003.04
0.000.00
.87
0.00
.63
N1GG
SI
AL
FM
C
ALK
K
M3
TI
P
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 43.09
M 33.43
A 23.49
F 39.96
C 38.25A J1.7H
N 22.60
K 13.68C 63.72
No. 1186
MINERALOGY: Groundmass: Preponderant brown glass,
augite, corroded olivine, magnetite, rare plagioclase.
OTHER INFORMATION: Finely scoriaceous, young lava
of Aden Series.
No. 1187
MINERALOGY: Groundmass: Fine-grained actinolite
and altered plagioclase, nodules of serpentinite(?) and
magnetite.
OTHER INFORMATION: Precise nature of this rock is
uncertain. From 100 m below the summit of Selki:
altered quartz-gabbro, composed of abundant zoned
An67, actinolite, epidote, chlorite, common magnetite,
brown titanite, rare quartz.
No. 1188
MINERALOGY: Coarsely scoriaceous rock. Phenocrysts:
An70-75, olivine, augite. Groundmass: Plagioclase,
magnetite, glass, femics(?), no zeolites.
OTHER INFORMATION: Locality not identified.
1187
ALTERED HcRUBLENDITE
13.17N 38.17E, MT.
P. COMUCCI. 19S0
5AMPHIBOLITISLD BASALT"
SELKl, blMIEN
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H20-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
45.78
1.13
11.16
4.95
7.47
.08
16.24
H.43
1.01
1.23
? 16
1.91
1.12
0.00
0.00
o.oo0.00
0.00
0.00
100.67
wATER-C02-FREE
46.89
1.16
11.43
5.07
7.65
.08
16.63
8.63
1.03
1.26
.16
(100.0)
SITI
ALFE3
FE2MN
M6
CA
NAK
P
H +
H-C
S
ATOMS
WEIGHT
21.39
.68
5.90
3.46
5.81
.06
9.80
6.02
.75
1.02
.07
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.13
.32
4.92
1.40
2.34
.03
9.07
3.38
.73
.59
.05
0CP
ORA8
AN
NELC
ACNS
DI
WOHY
OL
MTHM
ILTI
RUAP
CC
MGO/MGO*FEO
IN FEMCS =
WtlGHT NORM
(100.0)
0.00
0.00
7.46
8.77
22.80
0.00
O.OO
0.00
0.00
15.19
0.00
19.60
16.26
7.37
0.00
2.20
0.00
0.00
.36
0.00
.87
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
7.53
8.85
23.02
0.00
0.00
0.00
0.00
15.64
0.00
10.83
31.54
0.00
0.00
2.22
0.00
0.00
.36
0.00
.73
SIAL
FM
CALK
88
12.7
66.4
17.5
3.4
3-COMPONENT
WT.PERCENTS
F 40.19
H 52.56
A 7.25
F 53.79
C 36.51
A 9.70
11.53
79.01
1188
P0RPHYR1TIC GLASSY OLlVlliE RASALT
11.47N 37.10E. MOSHA riGOjJAM"
P. COMUCCI, 1950
SI02
TI02
AL203
FE203
FEO
MNOMGO
CAO
NA?O
K20
P205
H20*
H20-
C02
S03
TOTAL
ORI&INAL
ANALYSIS
46.23
1.63
14.34
4.95
8.47
.18
9.20
9.76
2.33
.73
.28
1.33
.88
0.00
0.00
0.00
0.00
0.00
0.00
100.31
WATER-C02-FREE
(100.0)
47.13
1.66
14.62
5.05
8.63
.18
9.38
9.95
2.38
.74
.29
SITI
ALFt3
Ft2
MMMG
CANA
KP
H*
H-C
S
ATOMS
WEIGHT
21.60
.98
7.59
3.46
6.58
.14
5.55
6.98
1.73
.61
.12
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.38
6
1
2
5
3
1
46
35
40
67
06
16
93
70
35
09
0
CB
OR
ABAN
NELC
AC
NSDI
woHY
OLMT
HM
ILTI
RU
AP
CC
MG0/M60*Ft0
IN FtMKS =
WEIGHT NORM
(100.0)
0.00
0.00
4.41
20.13
27.00
0.00
0.00
0.00
0.00
16.73
0.00
10.21
10.42
7.33
0.00
3.15
0.00
0.00
.62
0.00
-.77
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.45
20.33
27.26
0.00
0.00
0.00
0.00
17.30
0.00
.71
26.14
0.00
0.00
3.18
0.00
0.00
.63
0.00
.59
SIAL
FM
C
100
18.2
53.3
22.6
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 52.26
M 35.83
A 11.92
F 51.14
C 37.20A 11.66
N 18.17K 5.69
C 76.13
1189
PORPHYRITlC r.ASALT12.07H 37.55E, L
P. COMLICC1. 1950
E. OF ADDIS ZEMEN, BEGHEMDEk
SI 02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
ORIGINAL
ANALYSIS
46.29
1.61
13.93
6.87
6.20
.18
6.19
9.72
2.97
2.60
.42
2.58
0.00
0.00
0.00
100.16
wATER-C02-FKEE
UOO.O)
14.36
7.08
10.02
3.06
2.68
SITI
AL
FE3
FE.2
MN
MG
CA
NA
?it
?I-
ATOMS
WEIGHT
21.63
.97
7.37
4.80
4.82
.14
3.73
6.95
2.20
2.16
.18
.03
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.
0
OR
AR
AN
NELC
AC
NS
Dl
WO
HYOL
MTHH
IL
TI
RU
AP
ccMGO/MGG*FEO
IN FEMC5 r
fcElCiHT NOCM
(100.0)
0.00
0.00
15.88
18.91
17.46
3.82
0.00
0.00
0.00
23.68
0.00
0.00
5.85
10. ?q
0.00
3.15
0.00
0.00
.95
0.00
.86
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
16.09
10.90
17.72
8.35
0.00
0.00
0.00
25.18
0.00
0.00
17.60
0.00
0.00
3.19
0.00
0.00
.96
0.00
.51
NIG6LI
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
108
19.
46.
24.
10.
2.
-35*
3-COMPONENT
WT.PERCENTS
F 52.64
M ?4.93
A 22.43
F 46.09
C 34.27
A 19.64
N 19.42K 17.00
C 63.57
No. 1189
MINERALOGY: Phenocrysts: Small plagioclase, titan-
augite, olivine, Groundmass: Plagioclase, magnetite,
augite.
No. 1190
MINERALOGY: Abundant An65, augite, iddingsitised
olivine. Groundmass: Plagioclase, abundant magnetite,
altered olivine.
No. 1191
MINERALOGY: Very fine-grained, minutely vesicular
rock. Phenocrysts: Zoned An70 (center) to An73 (rim),
small serpentinised olivines. Groundmass: Plagioclase,
abundant magnetite, augite.
OTHER INFORMATION: Locality not identified.
1190
PORPHYFUTIC BASALT
11.36N 36.52E. 1S?ALA GHEORGHIS.
P. COMUCCI, 1950
SIO2
TIO2
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CD2
S03
TOTAL
ORIGINAL
ANALYSIS
46.40
2.06
16.49
6.00
5.48
.14
5.76
9.48
4.12
1.54
.45
1.33
.77
0.00
0.00
0.00
0.00
0.00
0.00
100.02
WATER-C02-FREE
(100.0)
47.39
2.10
1 .84
>.13
).6O
.14
>.88
J.68
? .21
1.57
.46
SITI
ALFE3
FL2MN
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
21.68
1.23
8.72
4.20
4.26
.11
3.47
6.78
3.06
1.28
.20
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0
17.37
.58
7.28
1.69
1.72
.04
3.22
3.80
2.99
.74
? 14
0a
OR
A8AN
NE
LCAC
NSDI
WO
HYOL
MT
HM
IL
TI
PiJ
APCC
MGO/MGOthtiU
IN FbMICS =
WEIGHT NORM
(100.0)
0.00
0.00
9.31
24.29
22.37
6.16
0.00
0.00
0.00
IS.20
0.00
0.00
5.77
8.90
0.00
3.99
0.00
0.00
1.00
0.00
.91
NON-OX I DAT I ON NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.009.42
17.44
22.6310.10
0.00
0.00
0.00
19.37
0.00
0.00
15.98
0.00
0.00
4.04
0.00
0.00
1.02
0.00
.54
FMC
ALK
41. a
23.8
11.7
3-COMPONENT
WT.PERCENTS
F 50.11
M 25.15
A 24.72
F 43.13
C 35.61
A 21.2h
N 27.21K 10.17
C 62.62
1191
PORPHYRITIC
P. COMUCCI, IS>5O
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MtjO
CAO
NA20
K2U
P205
H20*
H2U-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
46.47
1.87
15.17
4.67
8.40
.16
7.50
9.45
3.46
1.15
.23
1.08
? 43
0.00
0.00
0.00
o.co0.00
0.00
100.04
WATER-C02-FKEE
47.16
1.90
15.40
4.74
8.53
.16
7.61
9.59
3.51
1.17
.23
(100.0)
SI
TIAL
FE3FE2
MNMo
CA
NAK
PH*
H-
C
5
ATOMS
WEIGHT
21.71
1.12
8.03
3.27
6.53
.12
4.52
6.75
2.57
.95
.10
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.39
.53
6.69
1.32
2.63
.05
4.19
3.79
2.51
.55
.07
0
CROR
AHAN
NE
LCAC
NSDI
WOHY
OLMT
HMIL
TIRU
APCC
MGO/MGO+FEO
IN FEMCS =
WEIGHT I-IORM
(100.0)
0.00
0.00
6.91
23.18
22.76
3.57
0.00
IJ.OO
0.00
19.04
0.00
0.00
13.55
6.P9
0.00
3.60
0.00
0.00
.51
0.00
.74
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
6.97
17.89
22.96
6.58
0.00
0.00
0.00
19.69
0.00
0.00
21.75
0.00
0.00
3.63
0.00
0.00
.52
0.00
.56
103
19.8
48.6
22.5
9.1
.18
.51
3.1
.22
.46
-33
3-COMPONENT
WT.PERCENTS
F
MA
FC
A
HK
C
U.I.
51.91
29.79
18.31
48. IS
34.83
16.99
24.61
8.18
67.21
63.54
1192
PICFUHC PAbALT
11.3614 37.23E.
P. COMUCCI, 1950
(:AP, GOJJAM
5102
TIU2
AL2O3
FE2O3FEO
MNO
MGO
CAO
NA20
K2U
P205
H20*
H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
47.10
? P6
14.42
4.21
7.90
.17
10.46
9.12
2.95
1.19
.10
1.29
.43
0.00
0.00
0.00
0.00
0.00
0.00
100.20
bATER-C02-FKEE
(100.0)
47.83
.87
14.64
4.27
8.02
.17
10.62
9.26
3.00
1.21
.10
SI
TIAL
FE3FE2
MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
22.01
.52
7.63
2.94
6.14
.13
6.31
6.52
2.19
.99
.04
.02
.01
0.00
0.00
44.76
ATOMS
NUMBERS (100.0
17.49
6
1
2
5
3
2
24
31
IB
46
05
flO
63
13
56
03
60.12
0
CBOR
ABAN
NELC
ACNS
DI
WO
HY
OL
MT
HM
ILTI
RU
AC
ccMGO/MGO+f-LU
IN Fbr-ilCS =
WEIGHT NORM
(100.0)
0.00
0.00
7.16
21.56
22.90
2.07
0.00
o.oo0.00
It).12
0.00
0.00
20.10
6.21
0.00
1.66
0.00
0.00
? ?2
0.00
? 7f-
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
7.21
16.78
23.09
4.78
0.00
0.00
0.00
18.63
0.00
0.00
27.61
0.00
0.00
1.67
0.00
0.00
.22
0.00
C/FM
OZ
3-COhPONENT
WT.PERCENTS
F
MA
F
CA
N
KC
45.34
39.16
15.50
47.73
35.95
16.32
22.25
B.97
68.78
No. 1192
MINERALOGY: Aphyric, with rare vesicles. Ground-
mass: Abundant brown augite, uncommon An50, rather
altered olivine, scarce magnetite, some brown glass.
OTHER INFORMATION: Young lava of Aden Series.
No. 1193
MINERALOGY: Groundmass: Abundant An60-55, common
augite, fresh Mg-rich olivine, black glass, rare
magnetite.
OTHER INFORMATION: Locality not identified.
No. 1194
REMARKS: H2O+ and CO together equal 1. 39%; high
alumina, high alkalis.
MINERALOGY: Extremely fine-grained. Groundmass:
An52, magnetite, olivine(?), calcite (signs of alteration).
OTHER INFORMATION: Locality not identified.
1193
nOLERITIC r.ASALT
11.15N 36.50Ei
P. COMUCCI, 1950
KOLETTOA, DANGHILA, GOJJAH
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA2O
K20
P2O5
H20*
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
48.33
.98
17.58
2.38
7.90
.11
7.75
11.49
2.90
.13
.07
.59
.10
0.00
0.00
0.00
0.00
0.00
0.00
100.31
k.ATER-C02-FREE
48.51
.98
17.65
2.39
7.93
.11
7.7H
11.53
2.91
(100.0)
51
TI
ALFt3
FE2
MN
MG
CA
NA
ATOMS
WEIGHT
22.58
.59
9.30
1.66
6.14
.09
4.67
8.21
2.15
ATOMS
NUMBERS (100.0)
17.65
.27
7.57
.66
2.42
.03
4.23
4.50
2.06
0.00
0.00
0CB
ORAB
ANNE
LCAC
NSDI
WO
HY
OLMT
HMIL
TIRU
APCC
MGO/MGO+F-EO
IN FEMICS =
HEIGHT NORM
(100.0)
0.00
0.00
.77
24.68
34,67
0.00
0.00
0.00
0.00
18.10
0.00
1.61
14.68
3.47
0.00
1.87
0,00
0.00
.15
0.00
.69
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
.78
22.99
34.83
.97
0.00
0.00
0.00
18.41
0.00
0.00
19.99
0.00
0.00
1.88
0.00
0.00
.15
0.00
.60
SIAL
FMC
ALK
KMG
TI
p
C/FM
106
22.7
44.0
27.0
6.3
.03
.58
1.6
.06
.bl
3-COMPONENT
WT.PERCENTS
6.80
4.39
1194
APHYR1C BASALT
P. COMUCCI. 1950
VESUS TAROP (N. SLOPES OF)
SI02
TIU2
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P205
H2U+
H20-
C02503
TOTAL
ORIGINAL
ANALYSIS
48.43
2.22
18.62
6.63
3.98
.25
3.35
6.90
5.36
2.12
.44
1.39
.40
0.00
0.00
0.00
0.00
0.00
0.00
100.09
WATER-C02-FREE
49.27
2.26
18.94
6.74
4.05
.25
3.41
7.02
5.45
2.16
.45
(100.0)
51
TIAL
FE3F?2
MNM&
CA
NAK
P
H*H-
Cs
ATOMS
WEIGHT
22.63
1.33
9.85
4.64
3.09
.19
2.02
4.93
3.98
1.76
.19
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.89
.62
8.11
1.85
1.23
.08
1.85
2.73
3.84
1.00
.14
0CB
OR
AHAN
NELC
ACNS
DIWO
HYOL
MT
HMIL
TI
RU
AP
CC
MG0/MG0*FEO
IN FEKICS -
KEIGHT NORM
(100.0)
0.00
0.00
12.77
32.95
20.78
7.19
0.00
0.00
0.00
8.94
0.00
0.00
3.05
7.37
1.68
4.29
0.00
0.00
.98
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
12.9426.21
21.0511.17
0.00
0.00
0.00
9.80
0.00
0.00
13.50
0.00
0.00
4.34
0.00
0.00
,99
0.00
.44
3-COMPONENT
WT.PERCENTS
F 49.49
M 15.67
A 34.89
F 42.46C
 27.61A 79.93
C
D.I.
37.2714.74
47.98
1195
D0LER1TIC BASALT
12.36N 37.1OE,
P. COMUCCI, 1950
TARAkA nl3?L6HEMDER?
5102
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
<20
P205
H2U*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
40.54
1.14
16.86
3.53
7.83
.13
7.05
10.74
2.08
1.09
.32
.69
.19
0.00
0.00
0.00
0.00
0.00
0.00
100.19
*ATER-CO2-F?EE
(100.0)
48.88
1.15
16.98
3.55
7.88
.13
7.10
10.81
2.09
1.10
.32
SITI
AL
FE.3
FE2MN
MQ
CANA
KP
H +
H-C
s
0
ATOMS
HEIGHT
22.68
.68
8.92
2.47
6.09
.10
4.25
7.68
1.54
.90
.14
.01
.00
0.00
0.00
44.73
ATOMS
NUMBERS <100.0
17.90
7
2
3
4
1
32
33
98
42
04
88
25
49
5110
60.79
0CO
OR
ANNF.
LCAC
NSDl
WOHY
OLMT
HMIL
Tl
RiJ
AP
CC
MGO/MGO+HEO
IN FEI-iICS =
HEIGHT hORM
(100.0)
0.00
0.00
6.50
17.76
33.65
0.00
0.00
0.00
0.00
14.80
0.00
16.08
3.16
b.16
0.00
2.IP
0.00
0.00
.70
0.00
.70
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.54
17.88
33.88
0.00
0.00
0.00
0.00
15.19
0.00
9.66
13.94
0.00
0.00
2.19
0.00
o.oo.71
0.00
.56
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
QZ
110
22.
45.
26.
6.
1.
-15
3-COMPONENT
WT.PERCENT5
FM
A
F
CA
52.64
32.67
14.69
44.95
42.50
12.54
No. 1195
MINERALOGY: Medium-grained. Groundmass: Rather
large anhedral augite, An70, scarce altered olivine,
magnetite, glass(?).
OTHER INFORMATION: Locality not identified.
No. 1196
MINERALOGY: Phenocrysts: An70 (center) to An60 (rim).
Groundmass: An50, rather rare augite, iddingsitised
olivine, no glass.
OTHER INFORMATION: Another specimen from this
locality had plagioclase about 10% An more calcic in
both phenocrysts and groundmass.
No. 1197
MINERALOGY: Phenocrysts: An50, anorthoclase, very
large titanaugite, uncommon aegirine-augite, brown
hornblende with rim of augite and magnetite. Ground-
mass: Plagioclase, augite, magnetite, no olivine.
1196
PORPHYRITIC rJASALT
11.53N 12.O1E, CONSELA,
P. COtfUCCI, 1950
SI02
TI02
AL2O3
FE2O3
FEO
MNU
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49.06
2.57
15.40
4.34
6.34
.15
5.81
H.84
3.62
1.83
.36
1.32
.73
0.00
0.00
0.00
0.00
0.00
0.00
100.37
V<ATER-C02-FHtE
(100.0)
15.66
4.41
5.91
8.99
51
TI
AL
Ft 3
F?2
MN
Mb
CA
NA
K
P
H +
H-
C
S
ATOMS
WEIGHT
22.92
1.54
8.15
3.04
4.93
.12
3.50
6.32
2.69
1.52
.16
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
18.24
.72
6.75
1.22
1.97
.05
3.22
3.52
2.61
.87
.11
0
CR
OR
A8
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGU-n-tO
IN FEMC.S =
wtlGHT NOf<K
(100.0)
0.00
0.00
11.02
30.90
2O.fr7
.17
0.00
0.00
0.00
17.47
0.00
0.00
7.59
6.41
0.00
4.96
0.00
0.00
.CO
0.00
.82
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
11.12
26.04
20.84
2.95
0.00
0.00
0.00
18.24
0.00
0.00
15.00
0.00
o.oo5.00
0.00
0.00
.81
o.oo
.57
SI
AL
FM
121
22
42
.3
.a
3-COMPONENT
tfT.PERCENTS
F
M
A
F
C
A
N
K
C
48.68
26.4H
24.84
42.77
35.40
21.83
?5.33
12.81
61.86
1197
TRACMYDOLtRITt
Il.OOM 36.55E, ENJA-(AKA,
P. COMUCCI. 1950
5IU2
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20 +
H20-
C02
S03
TOTAL
ORIGINAl
ANALYSIS
53.93
1.24
17.82
5.08
3.70
.10
2.43
4.S7
4.66
4.20
0.00
1.49
.93
0.00
0.00
0.00
0.00
0.00
0.00
100.45
*ATER-C02-FKtE
(100.0)
55.01
4.75
4.28
0.00
SI
TI
AL
Ft3
FE2
MN
MCj
CA
NA
K
P
H*
H-
C
S
ATOMS
wEI&HT
25.20
.74
9.43
3.55
2.88
.08
1.47
3.48
3.46
3.49
0.00
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
19.79
.34
7.71
1.41
1.14
.03
1.33
1.92
3.32
1.97
0.00
0
CB
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FEO
IN FLMC5 =
WEldHT NORM
(100.0)
0.00
0.00
25.38
36.35
15.54
1.06
0.00
0.00
0.00
7.22
0.00
0.00
2.51
7.53
0.00
2.40
0.00
0.00
0.00
0.00
.91
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
25.63
32.70
15.69
4.34
0.00
0.00
0.00
7.85
0.00
0.00
11.36
0.00
0.00
2.42
0.00
0.00
0.00
0.00
.39
C/FM
QZ
160
31.
31.
3-COMPONFNT
rtT.PERCENTS
F 43.75
M 12.11
A 44.15
F 39.00
C 21.6
119S
PHONOLITL
ll.OON 36.54t, ENJA,<A?A, ijOJjAMp. cnwucci. iy>o
SIU2
TIo2
AL203
FF203
FEU
KNU
M<30
CAu
NA20
<20
P2O5
H2u*
H20-
C02
S03
TOlAl
ANALYSI
55.04
.50
19.57
3.63
? 93
.22
.44
1.78
8. 86
7.62
.05
.90
1.02
O.CO
0.00
0.00
0.00
0.00
0.00
100.56
ftATER-C02-F?tE
(100.0)
55.80
.51
19.84
3.68
.94
.22
.45
1.80
8.98
7.73
.05
SITI
ALFt3
FE2MN
MGCA
NAK
PH*
H-C
s
ATOMS
HEIGHT
25.71
.30
10.35
2.54
.72
.17
.27
1.27
6.57
6.33
.02
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0
19.76
8
6
3
14
28
98
28
07
24
69
17
49
02
DC'i
OR
AB
ANNF.
LCAC
NSDI
WOHY
OLM
H*.
II.TI
R'JAP
CC
KLlGHT NOI<M
(100.0)
0.00
0.00
45.76
7.24
0.00
28.G1
0.00
10.67
1.19
4.67
1.1H
0.00
0.00
0.00
o.ro
.96
0.00
0.00
.11
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
46.09
13.03
0.00
25.10
0.00
0.00
4.04
7.62
0.00
0.00
3.05
0.00
0.00
.97
0.00
0.00
.11
0.00
N1GGLI
SIAL
FM
C
ALKK
MGTI
P
C/FM
OZ
176
3b.
13.
6.
43.
1.
-78
IN F-Lt- Kb =
3-COMPONENT
wT.PERCENTS
F 21.21
M 2.0b
A 76.7?
F 19.9H
48.5241.73
No. 1198
MINERALOGY: Fine-grained, aphyric. Groundmass:
Minute sanidine, common nepheline, green hornblende,
rather large barkevikite, pale-pink cancrinite, very
rare colourless pyroxene, red-brown iron-oxide (cossy-
rite?).
No. 1199
MINERALOGY: Fine-grained, aphyric. Groundmass:
Minute sanidine (anorthoclase?) common nepheline,
green hornblende, rather large barkevikite, very rare
colourless pyroxene, red-brown iron-oxide (cossyrite?).
No. 1200
MINERALOGY: Very fine-grained, aphyric. Groundmass:
Sodic plagioclase(?), K-feldspar, pale yellow nepheline,
rare aegirine or aegirine-augite, magnetite, glass.
1199
r>HONOLITfc
ll.OOM 36.54E,
P. COMUCC1, 1950
SI02
T102
AL2O3
FE2O3
FEG
MNO
MGU
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
56.56
.67
20.60
2.63
1.07
? 25
0.00
2.01
9.33
5.05
.09
.92
1.10
0.00
0.00
0.00
0.00
o.oo0.00
100.48
1.09
.25
0.00
2.04
9.48
5.13
SITI
AL
Ft3
Ft2
MN
MG
CA
NAK
PH*
H-C
S
ATOMS
WEIGHT
26.42
.40
11.01
1.84
.83
.19
0.00
1.44
6.92
4.19
.04
.01
.01
0.00
0.00
ATOMS
NUMREKS (100.0)
20.11
.18
8.72
.70
.32
.08
0.00
.77
6.44
2.29
.03
0
CB
OS
AR
AN
NELC
AC
NS
DI
WO
HY
OL
MT
HM
ILTI
RU
AP
CC
M^O/MGOtFEO
IN FEMCS =
ntl&hT NOW
(100.0)
0.00
0.00
30.39
37.42
0.00
23.1Q
0.00
.27
0.00
0.00
4.01
o.oo0.00
2.37
.95
1.29
0.00
0.00
.20
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
30.54
32.90
0.00
25.77
0.00
0.00
.07
8.62
0.00
0.00
.60
0.00
0.00
1.30
0.00
0.00
.20
0.00
0.00
SIAL
FM
190
41
10
KMG
TI
P
C/FM
QZ
.260.00
1.7
.13
.70
-75
3-COMPONENT
WT.PERCENTS
F 20.46
M 0.00
A 79.54
F 18.42
C 10.00
A 71.5B
N 56.92
K 30.81
C 12.26
1200
PHONOLITE
12.ION 37.52E,
P. C0MUCC1, 1950
AMBA Lit1'), IFA(j. BtGHEMDER
SI02
TI02
AL203
FE2O3
FEO
MNO
MRO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
C02
SO3
TOTAL
ANALYSIS
60.57
? ?vl
17.45
4.61
.50
.06
.84
1.88
5.29
5.94
0.00
1.16
1.05
0.00
0.00
0.00
0.00
0.00
0.00
99. R6
WATEH-C02-FKEE
(100.0)
62.03
.51
.06
SITI
AL
FE3
Ft2
MN
MG
CA
NA
<
P
H +
H-
Cs
ATOMS
WEIGHT
28.30
.31
9.23
3.22
.39
.05
.51
1.34
3.92
4.93
0.00
.01
.01
0.00
0.00
ATUMS
NUMBERS (100.0)
21.83
.14
7.41
1.25
.15
.02
.45
.73
3.70
2.73
0.00
FLIGHT r?OHM
(100.0)
2.31
0.00
36.04
45.95
6.39
0.00
0.00
0.00
0.00
2.48
0.00l.CO
0.00.34
4.50
TIRU
AP
CC
MGO/HGO+I-^U
IN FtMCS =
0
0
0
0
1.
.00
.00
.00
.00
oo'
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
36.37
46.37
6.45
0.00
0.00
0.00
0.00
2.77
0.00
3.98
3.07
0.00
0.001.00
0.00
0.00
0.00
0.00
.28
SIAL
FMC
ALK
K
MG
TI
P
229
38.9
19.7
7.6
33.8
.42
.24
1.5
0.00
3-COMPONEI4T
WT.PEHCENTS
F 29.74
78.05
10.3?
61.64
40.3545.31
14.34
1201
NHONOLlTt
12.10* 37.52E,
P. COMUCCI, 1950
l("Ai.,? BEdHEMDER
SI02
TIu2
AL2O3
FE2O3
FEU
MNO
MGO
CAO
NA2C
K2u
P2O5
H2U +
H2O-
C02
SO 3
TOTAL
ANA
61.
17.
4.
#
?
.
5.
5 .0.
1.
1.
;l1
'.6
il
49
1-,1
54
i6
? 2
DO^
'6
0.000.00
0.000.00
0.000.00
100.57
wATEFi-C02-Fr<EE
(100.0)63.59
.1118.36
4. 74
.50
.11
.63
.56
5.82
5.57
0.00
SITI
AL
Ft3FE2
MNM&
CA
NAK
PH*
H-C
s
ATOMS
HEIGHT
28.90
.07
9.45
3.22
.38
.09
.37
.39
4.204.50
0.00
.02
.01
0.000.00
ATOMSNUMBERS (100.0)
22.23
7
1
3
2
0
03
57
25
15
03
33
21
95
49
00
0
CftOR
A;;
AMHE
LCAC
NSCI
woHY
OLMT
H-1
IL
TI
R1J
AP
CC
MGO/MGGtFLO
IN FEMC5 =
KtlGHT NOPM(100.0)
b.091.71
33.0249.36
2.760.00
0.000.00
0.000.00
0.00
1.570.00
1.673.60
? 21
0.000.00
0.000.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVEKTEO TO FEO)
2.461.73
33.3249.81
Z.790.00
0.000.00
0.000.00
0.00
9.670.00
0.000.00
.22
0.000.00
0.000.00
.20
NIGGLI
SIAL
FMC
ALKK
MGTI
PC/FM
OZ
247
42.
19.
2.
35.
0.
4
3-COMPONENT
WT.PERCENT5
F 30.38
M 3.63
A 65.99
F 30.50
C 3.23
A 66.27
H 48.71
K 46.64
C 4.65
No. 1201
MINERALOGY: Very fine-grained, aphyric. Ground-
mass: Sodic plagioclase(?), K-feldspar, pale yellow
nepheline, rare aegirine or aegirine-augite, magnetite,
glass.
OTHER INFORMATION: Termed "nepheline trachyte"
by Comucci (also 1200).
No. 1202
MINERALOGY: Groundmass: Yellow-brown glass, some
aegirines; microlites anorthoclase, magnetite, and
femics.
OTHER INFORMATION: Locality not identified.
No. 1203
REMARKS: Potassic quartz-trachyte.
MINERALOGY: Phenocrysts: Corroded anorthoclase,
rare aegirine. Groundmass: K-feldspar, augite,
magnetite, quartz(?), plagioclase(?), limonite(?).
OTHER INFORMATION: Locality not identified.
1202
HYALOTRACHYTE
P. COMUCCl. 1950
SI02
TI02
AL203
FE203
FEU
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H2U-
C02
S03
ORIGINAL
ANALYSIS
62.27
1.08
13.02
2.55
6.76
.If,
.72
4.11
4.02
3.49
.11
1.36
.53
0.00
0.00
0.00
k,ATER-C02-FREE
(100.0)
13.25
2.59
6.88
SITl
ALFt3
FE2MN
M6
CA
NA
K
P
H*
H-
Cs
ATOMS
WEIGHT
29.09
.65
6.89
1.7H
5.25
.12
.43
2.94
2.98
2.90
.05
.02
.01
0.00
0.00
ATOMS
NUhBERS (100.0)
22.74
.30
5.60
.70
2.07
.05
.39
1.61
2.85
1.63
.03
Q
CO
OR
AH
ANNE
LC
ACNS
Dl
WO
HY
OL
MT
HM
IL
TI
RJ
AP
ccMGuVMGO-fKtU
FEMICS =
HEIGHT NO^M
(100.0)
14.72
0.00
21.04
34.69
7.24
0.00
0.00
0.00
0.00
11.19o.no
5.02
0.00
3.77
0.00
2.09
0.00
0.00
.24
0.00
.21
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
12.04
0.00
21.14
34.86
7.28
0.00
0.00
0.00
o.oo11.36
0.00
10.9B
0.00
0.00
0.00
2.10
0.00
0.00
.25
0.00
.14
SIAL
FM
230
28.4
32.6
C/FM
QZ
3-COHPONENT
WT.PERCENTS
F 53.OH
M 4.10
A 42.82
F 44.48
34.60
30.03
35.3?
1203
PORPHYRITIC TRACHYRHYOl.ITf
12.45N 37.43E, AMDA GHEORGHIS?
P. COMUCCl, 1950
N.L.. OF GONDAR, bEc-iHEMDER
5102
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
66.19
.91
12.95
5.10
.99
.07
? 55
3.01
3.81
4.24
.26
1.04
1.05
0.00
0.00
0.00
0.00
0.00
0.00
100.17
^ATER-C02-FKEE
(100.0)
13.20
5.20
1.01
51
Tl
AL
Ft3
Ft2
MN
Mo
CA
NA
K
P
H +
H-C
S
ATOMS
WEIGHT
30.92
.55
6.85
3.57
.77
.05
.33
2.15
2.83
3.52
.11
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
23.77
.25
5.48
1.3b
.30
.02
.29
1.16
2.65
1.94
.08
0c
OR
A9
AN
HELC
AC
NS
DI
WO
HYOL
MT
H"A
ILTI
RU
AP
CC
MGO/MGO*FE0
IN FEMIC5 =
WLl&HT NORM
(100.0)
23.15
0.00
25.62
32.95
5.76
0.00
0.00
0.00
o.oo3.02
1.70
0.00
0.00
.81
4.66
1.76
0.00
0.00
.58
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
19.60
0.00
25.B7
33.28
5.82
0.00
0.00
0.00
0.00
6.99
0.00
6.07
0.00
0.00
0.00
1.78
0.00
0.00
.59
0.00
.18
SIAL
FMC
ALK<
29033.4
24.3
14.2
28.1
.47
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 41.46
M 3.74
A 54.80
F 35.51
C 17.55A 46.94
N 34.45
K 38.34C 27.22
1204
HYALOKHYOLITk.
P. C0MUCC1, 1950
AXIUOA, r,QjjAM
SIU2
TIU2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2U
P2O5
H2O*
H2O-
COt
SO3
TOTAL
ANALYSIS
68.55
.67
13.82
5.73
.30
.03
.41
.68
3.58
3.20
.11
2.1)6
1.25
0.00
0.00
0.00
0.00
0.00
0.00
100.39
ATER-CO^-FrftE
(100.0)
0
4
5
3
3
61
69
24
90
31
03
42
70
69
30
11
SITl
Al_
FL3Ft2
MNMb
CANA
KP
H*H-
Cs
ATOMS
WEIGHT
32.03
.40
7.31
4.01
.23
.02
.25
.49
2.66
2.66
.05
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
24.57
.18
5.84
1.55
.09
.01
.22
.76
2.49
1.46
.03
0
enOR
An,
AMNF
LC
ACN5
DI
WO
HY
OL
MT
H'lIL
TIRJ
wLIGHT riO'^h
(100.0)
34.56
3.55
19.54
31.29
2.fi2
o.ro0.00
0.00
0.00
0.00
0.00
1.05
0.00
0.00
5.92
.72
0.00
.31
NON-OXlDATIJN NORM
(FE2O3 CONVEKTED TO FEO)
31.14
3.59
19.76
31.64
2.85
0.00
0.00
0.00
0.00
0.00
0.00
9.45
0.00
0.00
0.00
1.33
0.00
0.00
NIGGLI
SIAL
FMC
ALK
K.
MGTI
P
C/FM
QZ
349
41.
26.
3.
28.
?..
136*
0.00
3-COMPONfNT
WT.PERCENTS
F 45.61
44.70
5.04
50.26
47.9942.90
9.1?
No. 1204
MINERALOGY: Finely scoriaceous rock. Groundmass:
Yellow glass, sanidine, magnetite, mica(?), zeolite(?).
OTHER INFORMATION: Locality not identified.
No. 1205
REMARKS: Potassic rock.
MINERALOGY: Phenocrysts: K-feldspar. Groundmass:
Holocrystalline quartz, slightly altered K-feldspar,
some anorthoclase(?), epidote, iron-oxide.
OTHER INFORMATION: Locality not identified.
No. 1206
MINERALOGY: Groundmass: Yellow-brown (partly
devitrified), corroded anorthoclase.
OTHER INFORMATION: Locality not identified.
1205
QUARTZ POkPHYRY
P. COMUCCI. 1950
OF 1FAC,, hEr.HEKDER
SIU2
TI02
AL203
FE2O3
FF.O
MNO
MGO
CAO
NA20K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ANALYSIS
70.63
??4
11.95
4.91
.30
0.00
? 10
.25
4.78
5.31
0.00
.74
.86
0.00
0.00
0.00
0.00
0.00
0.00
100.07
KATER-CO2-FKEE
(100.0)
12.14
4.99
.30
0.00
.10
.25
SI
TI
AL
Ft3
FL2
MN
MG
CA
NA
K
P
H*
H-
Cs
ATOMSWEIGHT
33.00
.14
6.32
3.43
.23
0.00
.Ob
.18
3.55
4.41
0.00
.01
.01
0.00
0.00
ATOMSNUMBERS (100.0)
25.00
.06
4.98
1.31
.09
0.00
.05
.09
3.28
2.40
0.00
31.96
32.35
MT
HM
IL
TI
RU
APcc
MGO/MGO?FEO
IN FEMCS =
.28
2.12
.46
0.00
0.00o.oo
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
24.08
0.00
32.27
32.66
0.00
0.00
0.00
0.00
2.08
1.13
0.00
7.32
0.00
0.00
0.00
.47
0.00
0.00
0.00
0.00
.04
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
QZ
363
36.2
21.1
1.4
41.3
.47
.04
.9
0.00
.07
113
3-COMPONENT
WT.PERCENTS
F 33.83
1206
HYALONHYOLITt
P. COMUCCI, 1950
SLOl--ES OF KICHA
SI02
TI02
AL203
FE2O3
FEO
MNG
MGO
CAJ
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
ANALYSIS72.07
.36
13.97
1.02
1.00
.08
.38
1.25
3.HO
3.70
0.00
2.49
.23
0.00
0.00
0.00
0.00
0.00
0.00
100.35
..ATER-C02-FKEE
(100.0)
14.31
1.04
1.02
SI
TI
AL
Ft3
Ft2
MN
MG
C?
Nh
K
P
H+
H-
C
S
ATOMS
WEIGHT
33.67
.22
7.39
? 71
.78
.06
.23
.89
2.82
3.07
0.00
.03
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.37
.10
5.80
.27
.29
.0?
.20
.47
2.59
1.66
0.00
0
CB
OR
A1
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
IL
TI
PJ
AP
CC
MflO/*t&O*f to
IN Ftf-;ICS =
v>E_lGHT NOUf
(100.0)
32.94
1.45
22.46
3J.O2
6.37
0.00
0.00
0.00
0.00
0.00
0.00
1.54
0.00
1.5?
0.00
.70
0.00
0,00
0,00
O.PO
.69
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
31.90
1.45
22.51
33.09
6.38
0.00
0.00
0.00
0.00
0.00
0.00
3.97
0.00
0.00
0.00
.70
0.00
0.00
0.00
0.00
.30
4O3
46.1
12.5
TI
PC/FM
OZ
1.5
0.00.60
167
3-COMPONENT
wT.PERCENTS
F 20.40
18.76
11.61
69.64
43.43
42.24
14.29
1207
IIYALOKHYULITt
11.38N 37.03E,
P. COMUCCI. 1^
SIU2TI02
AL203FE203
FEOMNU
MGO
CAO
NA20
K20
P2O5H20*
H20-
C02
S03
TOTAL
ORIGINAL
AI.ALY5I5
73.87
? ?6
12.56
3.28
? 36
0.00
.79
1.59
2.45
"??60
0.00
.27
.20
0.00
0.000.00
U.000.00
0.00100.23
I.ATER-C02-FRE.E(100.0)
74.05
.26
12.593.29
.36
0.00.79
1.59
4.610.00
SITI
AL
Fh.3
Ft2MN
M&CA
NAK
P
H*
H-
C
s
ATOMS
HEIGHT
3*. 51
.16
6.65
2.29
.28
0.00
.48
1.14
1.S2
3.82
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0
25.66
5
0
1
2
0
07
14
86
10
00
41
59
65
04
00
0
CT
OR
Afl
AM
NELC
ACNS
DI
WO
HY
OL
MT
HM
IL
Tl
PU
AP
cc.Mf.O/MGO + FEO
IN FLMICS =
fttlGhT NOPM
(100.0)
37.37
.64
27.33
20.84
7.93
0.00
0.00
0.00
0.00
0.00
0.00
1.98
0.00
.41
3.01
.49
0.00
0.00
o.no0.00
1.00
MOM-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
35.25
.64
27.50
20.977.98
0.000.00
0.000.00
0.00
0.007.16
0.000.00
0.00
.50
0.000.00
0.000.00
.34
NIGGLI
SIAL
FM
C
ALK
K.
MGTI
P
C/FM
OZ
401
40.
21.
9.
28.
1.
0.
186
3-COMPONENT
WT.PERCENTS
F 31.71
29.64
12.95
57.41
28.36
53.24
18.40
No. 1207
REMARKS: Potassic rock.
MINERALOGY: Groundmass: Abundant red-brown glass
(with spherulites), sanidine, corroded anorthoclase(?),
common quartz, phlogopite, magnetite.
No. 1208
REMARKS: Potassic rock.
MINERALOGY: Phenocrysts: Very rare quartz and
sanidine. Groundmass: Holocrystalline quartz and
K-feldspar spherulites, aegirine-augite.
OTHER INFORMATION: Imprecise locality.
No. 1209
MINERALOGY: Fine-medium grained. Groundmass:
Holocrystalline, spherulites, abundant limonite, quartz,
anorthoclase, no femics.
1208
RHY0L1TE
13.12N 38.18E.
P. COMUCCI. 1950
MAI SHAHA VALLEY. SIMIEN? BEGHr.MDER
SI02
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
OR I 61.-4 Ai
ANALYS11
7i>.25
.43
10.B8
2.60
1.64
.04
0.00
.43
3.76
5.06
0.00
.37
? 16
0.00
o.oo0.00
0.00
0.00
0.00
100.32
WATER-C02-FREE
(100.0)
75.41
.43
10.60
2.61
1.64
.04
0.00
.43
SI
TI
AL
FE3
Ffc2
MN
M&
CA
NA
K
P
H*
H-
Cs
ATOMS
WEIGHT
35.16
.26
5.60
1.82
1.27
.03
0.00
.31
2.79
4.20
0.00
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.18
.11
4.34
.68
.48
.01
0.00
.16
2.54
2.25
0.00
0
CB
OR
AP
AM
NE
LC
AC
NS
DI
kiO
HY
OL
MT
H'l
ILTI
RLJ
AP
CC
MGU/MGO+FEO
HEIGHT NOPM
(1OO.O)
34.01
0.00
30.05
26.25
0.00
0.00
0.00
5.03
0.00
1.91
0.00
.f 5
0.00
1.27
0.00
.f>2
0.00
0.00
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
34.05
0.00
30.20
26.39
0.00
0.00
0.00
0.00
1.34
1.92
0.00
5.28
0.00
0.00
0.00
.82
0.00
0.00
0.00
0.00
FMc
ALK
K
MG
TI
P
C/FM
OZ
19.9
2.7
40.6
.47
0.00
1.9
o.oo.14
192
3-COMPONENT
WT.PERCENTS
F 32.47
M 0.00
A 67.53
F 31.43
C 3.19
A 65.38
C
D.I.
40.65
54.704.65
1209RHYOLITt
13.16IM 38.23E,
P. COrtuCCl, 1950
(-DD1S ARIT, SIMlEN
SIU2
TIOZ
AL203
FE203
FEOMNO
MGO
CAO
NA20
K20
P205
H20 +
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
75.BO
.39
9.56
6.18
.20
0.00
.15
.36
3.20
3.08
.07
1.16
.27
0.00
0.00
0.00
0.00
0.00
0.00
100.42
KATER-C02-FKEE
(100.0)
76.57
.39
9.66
6.24
.20
0.00
3.23
3.11
.07
SITI
AL
Ft3
FE2
HU
Mli
CA
NA
IC
P
H*
H-
C
S
ATOMS
WEIGHT
35.41
.23
5.06
4.32
.16
0.00
.09
.26
2.37
2.56
.03
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.57
.10
3.95
1.63
.06
0.00
.08
.14
2.IB
1.38
? 02
HEIGHT NORM
(1C0.0)
4<..9O
.44
lb.44
27.43
1.39
0.00
0.00
0.00
0.00
0.00
0.00
.38
0.00
U.00
6.26
.43
0.00
.17
.15
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
41.28
.45
18.66
27.76
1.41
0.00
0.00
0.00
0.00
0.00
0.00
9.52
0.00
0.00
0.00
? 76
0.00
0.00
.16
o.oo
c
ALK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 49.80
48.19
46.39
MGO/MGU+FEO
IN FEMCS =
1210
SCORIACEOuS POkPHYRlTIC ..ASAlT
08.40K 39.2/E, ?ALE'!CMITI, C:
0. HltKE-l-lEKLIN. 1950
SI02
TI02
AL.203
FF2O3
FEO
MNO
MGO
CAO
NA20
K?O
P?O5
H2U +
H?U-
C0<!
SO3
TOTAL
OCItlr.AL
ANALYSIS
43.fcO
1.97
lfa.13
3.70
7.6H
.05
5.48
12.12
3.00
? !1B
.34
.C6
.68
0.00
0.00
0.00
0.00
0.00
0.00
9S.69
*ATER-C02-FREE
(100.0)
45.08
2.03
18.66
3.HI
7.91
.05
5.64
12.4K
3.09
.91
.35
SITl
ALFL3
FL2
MNMb
CANA
K
PH*
H-c
s
0
ATOMS
WEIGHT
20.46
1
9
2
5
3
e2
0
0
la
59
59
97
04
31
66
23
73
15
01
01
00
00
43.77
ATOMS
NUMBERS (100.0
16.65
.56
8.12
1.06
2.45
.02
3.11
4.94
2.21
.43
.11
60.35
ntlCiHT NOW,
(100.0)
0.00
0.00
5.36
13.66
34.34
6.67
0.00
0.00
0.00
20.83
0.00
0.00
JJ.79
b.53
0.00
3.b5
0.00
0.00
.77
o.oo
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
5.40
9.54
34.60
9.12
0.00
0.00
0.00
21.48
0,00
0.00
15.21
0.00
0.00
3.8b
0.00
0.00
.77
0.00
NlbOLl
SIAL.
FMC
ALKK
MGTI
P
C/FM
UZ
98
23.
39.
29.
7.
3.
-33
3-COMPONENT
WT.PERCENTS
F 54.87
M 26.42
A 18.71
F 41.56C 44.27
A 14.17
No. 1210
REMARKS: Published summation is 99.69; the error
would appear to lie in either SiC>2 or Al^O,.
MINERALOGY: Phenocrysts: Zoned An72 (center) to
An57 (rim). Groundmass: Mostly glass; rare feldspar,
pyroxene, fresh olivine, magnetite, ilmenite.
No. 1211
REMARKS: P2O5 trace.
MINERALOGY: Penocrysts: Titanaugite, zoned olivine
(Fal6 center; Fa28 periphery). Groundmass: Labra-
dorite-bytownite, abundant magnetite, rare glass,
apatite.
OTHER INFORMATION: Mode: 26% pyroxene phenocrysts,
18% olivine phenocrysts, 56% groundmass.
No. 1212
MINERALOGY: Phenocrysts: Titanaugite, serpentinised
(net pattern) olivine Fa25 An70. Groundmass: Pyroxene,
altered olivine, plagioclase, magnetite, rare biotite,
very rare brown hornblende; tiny calcite veins cut this
rock.
OTHER INFORMATION: Mode: 25% pyroxene phenocrysts,
10% olivine phenocrysts, 5% plagioclase phenocrysts,
50% groundmass, 10% serpentine, talc (from olivine).
1211
OLlVlNE-PYROxtNE
0. HItKE-MERLll.
WADI S.;KYA, DLrtRA BERHAN-DtBRA ilNA ROAD, SHOA
1950
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGu
CAO
NA20
K20
P205
H2U*
H2O-
C32
SO3
CK2O3
TOTAL
ANALYSIS44.48
3.06
9.U
6.43
6.01
.18
13.45
12.26
2.56
1.18
0.00
.34
.26
0.00
0.00
.08
0.00
0.00o.oo
99.90
wATER-COz-FKEE
(100.0)
44.83
3.06
9.69
6.48
6.06
.16
13.56
12.36
2.58
1.19
0.00
SI
Tl
AL
FL3
FE2
MN
MG
CA
NA
K
P
H +
H-
C
s
ATOMS
HEIGHT
20.78
1.83
5.08
4.50
4.67
.14
8.11
6.76
1.90
.98
0.00
.00
.00
0.00
0.00
ATOMS
NUMHtRS (100.0)
16.63
.86
4.24
1.81
1.88
.06
7.51
4.91
l.flfc
.56
0.00
0
OR
At}
AM
NE
LC
AC
NS
01
WO
HY
OL
MT
HI
IL
TI
RU
AP
CC
MGO/MGO-fFEU
IN FEKICS =
WEIGHT NORM
(100.0)
0.00
0.00
7.04
H.ll
11.30
7.45
0.00
0.00
0.00
39.15
0.00
0.00
11.69
9.41
0.00
5.65
0.00
0.00
0.00
0.00
? 9C
NON-OXlCATION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
7.13
.66
11.44
11.64
0.00
0.00
o.oo
41.03
0.00
0.00
22.18
0.00
0.00
5.92
0.00
0.00
0.00
0.00
.73
FM
C
ALK
K
MG
TI
P
C/FM
QZ
57.7
25. Z
6.2
.23
.67
4.4
0.00
.44
-40
3-COMPONENT
WT,
F
M
A
F
C
A
N
K
C
.PERCENTS
41
45
12
43
43
13
16
7
76
.98
.39
.6?
.74
.11
,V>
.00
.37
.6?
1212
OLIVlNE-PYROXENfc BASALT
11.15N 40.10E. 3.5K'-l L. OF
0. HIEKE-I1EKL1N. 1950
BURKA. bATlE. wALLO
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2U5
H20*
H20-
C02
S03
CK.2O3
TOTAL
ORIGINAL
AUALYSI:
44.72
2.13
a.40
4.34
8.82
.56
11.90
ll.frO
1.97
.74
.40
2.f7
1.24
.21
0.00
.10
0.00
0.00
0.00
99.eo
WATEK-C02-FKEE
46.79
2.23
8.79
4.54
9.23
.59
12.45
12.14
2.06'
.77
.42
(100.0)
SI
TI
AL
FL3
FL2
MN
Mb
CA
NA
K
P
H*
H.
C
S
ATOMS
WEIGHT
20.89
1.28
4.44
3.04
6.86
.43
7.18
8.29
1.46
.61
.17
.03
.01
.06
0.00
ATUMS
NUMBERS (100.0)
17.43
? A3
3.86
l.?8
2.88
.19
6.93
4.85
1.49
.37
0
C3
OR
AR
AN
NE
LC
AC
NS
DI
WO
HY
01.
MT
HM
IL
Tl
Ft')
A=>
CC
MGU/MGOfl-LO
IN FLMICJ =
wE.IC.hT NORM
(100.0)
0.00
0.00
4.57
17.43
12.39
0.00
0.00
0.00
0.00
35.25
0.00
1.38
16.77
b.5l!
0.00
4.22
0.00
0.00
.91
.50
.79
NON-OXIOATION NORM
(FE2O3 CONVEKTED TO FEO)
0.00
0.00
4.61
13.17
12.49
2.39
0.00
o.oo0.00
36.23
0.00
0.00
25.42
0.00
0.00
4.25
0.00
0.00
.92
.50
.66
C/FM
QZ
3-COMPONENT
wT.PERCENTS
F 47.39
M 42.8")
A 9.76
F 47.91
C 42.23
13.77
5.17
ai.06
1213
OLIVINE PYROxEhE bASALT
09.32N 42.1SE* H. FLAMS OK MT. AbDULLA, HARAR^
0. HIEKE-hEKLIfc, 1950
SIO2
TIO2
AL203
FE2O3
FEJ
MNO
MGO
CAO
NA20
K20
P2O5
H20 +
H2U-
C02
S03
TOTAL
uklclriAL
ANALYSIS
44.92
1.74
13.48
2.68
10.35
.08
9.34
10.72
2.76
? R2
.30
1.82
? R8
0.00
0.00
0.00
0.00
0.00
0.00
99.89
wATER
46.22
1.79
13.87
2.76
10.65
.08
9.61
11.03
2.84
.84
.31
SITI
ALFE3
FL2MN
MGCA
NA
KP
H +
H-C
S
ATOMS
WEIGHT
20.99
1.04
7.13
1.87
8.05
.06
5.63
7.66
2.05
.68
.13
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0
17
6
3
5
4
2
.12
.50
.05
.77
.30
.03
.31
.38
04
40
10
0CH
ORAT
ANNF
LCAC
NSDI
WOHY
OLMT
WAIL
TI
RUAD
CC
MGO/MGO+FEO
I;M FEMCS =
WEIGHT MOKM
(100.0)
0.00
0.00
5.00
15.95
22.57
4.40
0.00
0.00
0.00
24.79
O.CO
0.00
19.22
4.01
0.00
3.40
0.00
0.00
.67
0.00
? 6B
NON-OXIDATION NORM
(FE2O3 cONVFrtTED TO FEO)
0.00
0.00
5.02
12.84
22.69
6.15
0.00
0.00
0.00
25.21
0.00
0.00
23.99
0.00
0.00
3.41
0.00
0.00
.68
0.00
.60
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
95
16.
52.
24.
6.
2.
-32
3-COMPONENT
WT.PERCENTS
F 50.21
M 35.99
A 13.80
47.68
}<J?22
13.10
NO. 1213
REMARKS: Published summation is 99.86.
MINERALOGY: Phenocrysts: Titanaugite, fresh olivine
(2V = 84?). Groundmass: An65, titanaugite, olivine,
magnetite, ilmenite.
No. 1214
MINERALOGY: Phenocrysts: Microphenocrysts: augite,
olivine Fa26, almost wholly iddingsitised with serpen-
tine borders. Groundmass: Labradorite, pyroxene,
olivine, abundant yellow-ochre glass, common magnetite,
octahedra.
OTHER INFORMATION: Mode: 21% augite micropheno-
crysts, 3% olivine microphenocrysts, 35% pyroxene,
olivine, magnetite, 26% glass, 6% plagioclase, 9%
serpentine (from olivine).
No. 1215
REMARKS: Published summation 100.28.
MINERALOGY: Phenocrysts: Zoned An83 (center) to
An54 (rim). Groundmass: Extremely fine-grained An70,
augite, olivine, iron-oxides.
OTHER INFORMATION: The locality of this specimen
is suspect, as the Entotto Range is entirely formed of
alkali rhyolite and trachyte lavas and tuffs (eg. , see
1235).
1214
LIMBUKGITIC BASALT
11.1114 39.59E, 3KM <l. OF [ATIEi
0. HItKE-MEKLIN. 1950
SIU2
TI02
AL2O3
FE2O3
FED
MNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
S03
CRiO3
TOTAL
ORIGINALANALYSIS
45.51
1.27
12.45
10.25
3.34
.18
7.38
12."47
2.28
1.27
.07
1.91
1.32
0.00
0.00
.06
0.00
0.00
0.00
99.76
WATER-C02-FREE
(100.0)
47.18
1.32
12.91
10.63
3.46
.19
1.32
.07
ATOMS
WEIGHT
TI
AL
FES
FE2
ATOMS
NUMBERS (100.0)
Q
CBOR
ABAN
NELC
ACNS
DIMO
HY
OL
MT
HM
ILTI
R'J
AP
CC
MGO/MG0?KL0
IN FtK.ICS =
WEIGHT NORM
(100.0)
0.00
0.00
7.79
19.30
20.68
.40
0.00
0.00
0.00
33.59
0.00
0.00
2.47
7.98
5.14
2.50
0.00
0.00
.16
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
7.96
9.36
21.11
6.00
0.00
0.00
0.00
36.52
0.00
0.00
16.34
0.00
0.00
2.55
0.00
0.00
.16
0.00
.55
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 55.42
M 30.10
A 14.4fl
F 45.90
C 42.11
A 11.99
1215
PORPHYRITIC ^ASALT
C9.O3N 38.45E, tiELO..,
0. HItKE-MERLIN. 1950
ENTOTTO MARIAM, ADDIS ABAJA , SHOA
SI02
TI02
AL203
FE203
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
45.52
1.82
21.12
2.68
6.95
.07
4.42
11.86
2.67
.67
.26
1.55
.62
0.00
0.00
0.00
U.00
0.00
0.00
100.21
V.ATER-C02-FREE
(100.0)
46.43
1.86
21.54
2.73
7.09
.07
4.51
12.10
2.72
.68
.27
SITI
ALFL3
FE2MN
MGCA
NAK
P
H +
H-C
s
ATOMS
HEIGHT
21.27
1.09
11.17
1.87
5.40
.05
2.67
8.48
1.9S
.56
.11
.02
.01
0.00
0.00
ATOMS
NUMBERS (100.0
16.96
9
2
2
4
1
51
28
75
17
02
46
74
93
32
08
HEIGHT NORM
(100.0)
0.00
0.00
4.05
20.78
44.51
1.25
0.00
0.00
0.00
11.51
0.00
0.00
9.83
3.97
0.00
3.52
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
4.07
17.72
44.74
2.97
0.00
0.00
0.00
11.80
0.00
0.00
14.57
0.00
0.00
3.54
0.00
0.00
FMc
ALK
34
29
7
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 55.3?
M 25.42
A 19.21
F 38.78
C 47.76
A 13.45
N 17.57
K 4.41
C 78.03
MGO/MGO+FEO
IN FEKICS =
1216
P0RPHYRIT1C bASALT
1O.O5N 42.52E, MT. IUDIDLEI,
0. HIEKE-KEkLIN, 1950
GOKTI, HARARGE
SIOZ
TI02
AL2O3
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20 +
H2U-
C02
S03
TOTAL
OkltlNAi
ANALYSIS
46.06
1.82
15.72
3.40
9.46
.11
6.35
9.00
3.23
1.21
.34
2.20
.84
0.00
0.00
0.00
0.00
0.00
0.00
99.74
WATER-C02-FREE
(100.0)
47.63
1.88
16.26
3.52
9.78
.11
6.57
9.31
3.34
1.25
.35
SI
Tl
AL
FE3
FE2
HN
MG
CA
NA
K
P
H*
H-
C
S
0
ATOMS
WEIGHT
21.52
1.09
8.32
2.38
7.35
.09
3.83
6.43
2.40
1.00
.15
.03
.01
0.00
0.00
45.15
ATOMS
NUMBERS (100.0)
17.57
.52
7.07
.98
3.02
.04
3.62
3.68
2.39
.59
.11
60.42
0
CB
OR
A a
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H*t
IL
TI
RU
AP
cc
MGO/MGOFLO
lit FLi'iICS =
WEIGHT NORM
(100.0)
0.00
0.00
7.41
2b.12
25.63
1.73
0.00
0.00
0.00
15.22
0.00
0.00
15.44
5.11
0.00
3.57
0.00
0.00
.77
0.00
.64
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
7.46
21.22
25.80
3.95
0.00
0.00
0.00
15.59
0.00
0.00
21.62
0.00
0.00
3.60
0.00
0.00
.77
0.00
.51
NIGGLI
SI
AL
FM
C
ALX
K
MG
TI
P
C/FM
QZ
107
21.
46.
22.
9.
3.
-29
3-COMPONENT
WT.PERCENTS
F 54.3H
M 26.85
A 18.77
F 48.90
C 34.22
A 16.88
NO. 1216
MINERALOGY: Phenocrysts: An64, not zoned with the
exception of a few individual crystals (all in the
bytownite-labradorite range); zoned olivine (Fa40 center
to Fa30 rim), with iddingsitised margins. Groundmass:
An64, completely iddingsitised olivine, augite, common
iron-oxides, rare apatite.
No. 1217
REMARKS: CC>2 trace.
MINERALOGY: Phenocrysts: Large (1 cm), zoned An63
(center) to An58 (rim). Groundmass: Minute plagioclase
crystals, altered femics, abundant minute magnetites.
No. 1218
MINERALOGY: Scoriaceous grey lava. Penocrysts:
Zoned An70 (center) to An58 (rim), augite, altered
olivine (2V - 86?). Groundmass: Plagioclase, augite,
altered olivine, magnetite, ilmenite.
1217
PORPHYRITIC u
09.51N 39.47E
0. HIEKE-MERLlh
ALT
EiELOk' DEr>RA S1NA.
1950
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
46.36
2.99
17.10
4.54
7.40
.07
4.02
8.16
3.51
2.36
.63
1.16
1.62
0.00
0.00
0.00
0.00
0.00
0.00
99.92
WATER-C02-FREE
(100.0)
47.72
3.08
17.60
4.67
7.62
.07
4.14
8.40
3.61
2.43
.65
SITI
ALFt3
FE2MN
MGCA
NAK
P
H*H-
Cs
ATOMS
WEIGHT
21.66
1.79
9.05
3.18
5.75
.05
2.42
5.83
2.60
1.96
.27
.01
.02
0.00
0.00
ATOMS
NUMBERS (100.0)
17.59
.85
7.65
1.30
2.35
.02
2.28
3.32
2.58
1.14
.20
0
CBOR
A3AN
NFLC
ACNS
DIWO
HY
OLMT
HMIL
TI
RU
AP
CC
MGO/MGO+FEO
IN FEMItS =
HEIGHT NORM
(100.0)
0.00
0.00
14.39
26.41
24.59
2.29
0.00
0.00
0.00
10.82
0.00
0.00
7.46
6.79
0.00
5.H4
0.00
0.00
1.42
0.00
.72
NON-OXIDATION NORM
(FE203 CONVEkTED TO FEO)
0.00
0.00
14.52
21.21
24.81
5.25
0.00
0.00
0.00
11.32
0.00
0.00
15.56
0.00
0.00
5.89
0.00
0.00
1.43
0.00
.46
51AL
FMC
ALK
117
25
39
22
12
3-C0MP0NENT
WT.PERCENTS
F 54.70
M 18.4?
A 26.89
F 45.9H
C 31.42
A 22.60
N 25.02
K 16.02
C 58.16
1218
PORPHYRITIC BASALT
10.ION 41.40E. (IT. AJELtl,
0. HIEKE-I-ERL1N> 1950
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2U5
H2O*
H2O-
CO2
SO3
ORIGINAL
ANALYSIS
46.47
2.27
16.45
5.92
6.21
.16
6.21
10. B2
3.03
.86
.33
.88
.30
0.00
0.00
WATER-C02-FREE
47.07
2.30
16.66
6.00
6.29
.16
6.29
10.96
3.07
(100.0)
SITI
ALFE3
FE2MN
MCj
CA
NA
ATOMS
WEIGHT
21.71
1.36
8.70
4.14
4.83
.12
3.75
7.73
2.25
ATOMS
NUMBERS (100.01
17.33
.64
7.23
1.66
1.94
.05
3.46
4.32
2.19
0.00
0.00
0
CR
OP.
ABAN
NELC
ACNS
DIWO
HY
OL
MT
HI
ILTI
RK
AP
CC
MGO/MGO + I-EO-
IN FEhlCS =
WEIGHT NORM
(100.0)
0.00
0.00
5.16
26.02
29.08
0.00
0.00
0.00
0.00
ltt.59
0.00
? 77
6.58
t>.71
0.00
4.36
0.00
0.00
.73
0.00
.87
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
5.22
19.82
29.41
3.52
0.00
0.00
0.00
19.67
0.00
0.00
17.21
0.00
0.00
4.41
0.00
0.00
.74
0.00
.55
SIAL
FMC
ALK
106
22
43
26
8
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 54.57
M 27.94
A 17.50
F 45.19C 40.31
A 14.49
N 20.60
K 5.85
C 73.56
1219
r ASALT DYM: dt> :
11.06U 39.39L, KOv
0. H]tKt-',ERLII(, 1950
LiASALTIC TUFFS)A-LtSSlt RUAb, kALLO
SI02
TI02
AL2O3
FF203
FED
MMu
MGU
CAO
NA20
K2U
P2O5
H20+
H?U-
C02
S03
TOTAL
URIC-INAl
ANALYSIS
47.04
2.28
lb.37
3.72
9.17
.OB
5.51
y.j"?
3.65
1.3R
.43
.fi6
.58
0.00
0.00
0.00
0.00
0.00
0.00
99.91
HATER-C02-FKEE
(100.0)
47.77
2
15
3
9
5
9
3
1
32
61
78
31
OH
60
99
71
40
44
SITI
AL
FE3
Ft2
MN
MCJ
CANA
KP
H+
H-C
S
0
ATOMS
HEIGHT
21.98
1.37
8.13
2.60
7.13
.06
3.32
7.03
2.71
1.15
.19
.01
.01
0.00
0.00
44.23
ATOMS
NUMBERS (100.0
17.66
.64
6.80
1.05
2.RR
.03
3.09
3.96
2.66
.66
.14
60.42
0
CR
OR
AT
AN
NF
LCAC
NSDI
WO
HY
OLMT
IL
TI
RU
AP
CC
?'GO/MGG+FEO
IiN FtMCS =
nLIGHT NOI'M
(100.0)
0.00
0.00
ti.3O
23.97
21.77
4.03
0.00
0.00
0.00
20.76
0.00
0.00
10.32
b.49o.no
4.39
0.00
0.00
.95
0.00
.64
KON-OXIDATIJN NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
8.36
19.77
21.92
6.44
0.00
0.00
0.00
21.35
0.00
o.oo16.78
0.00
0.00
4.43
0.00
0.00
.96
0.00
.49
NIGGLI
SIAL
FM
CALK
K
MGTI
P
C/FM
uZ
110
21.1
43.9
24.7
10.3
.20
.44
4.0
.43
.56
-32
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
N
K.
C
D.I.
55.01
23.52
21.47
46.43
35.45
18.12
24.55
9.2K
66.17
70.05
No. 1219
MINERALOGY: Fine-grained, flow textured. Pheno-
crysts: Rare An86 (center) to An57 (rim), very rare
serpentinised olivine. Groundmass: An6l, pyroxene,
olivine, magnetite, yellow glass.
No. 1220
MINERALOGY: Flow-texture. Phenocrysts: Augite,
altered olivine. Groundmass: An70, augite, magnetite,
green nodules (chalcedony?).
No. 1221
MINERALOGY: Phenocrysts: Abundant zoned An68
(center) to An34 (rim), rare olivine with iddingsitised
borders. Groundmass: Plagioclase, pyroxene, olivine,
common magnetite, some ilmenite, rather common
apatite, secondary calcite.
1220
OLIVlUE-PYRuXLNE bASALT
11.13N 39.55Ei bATIE-'
0. HIEKE-MEKLIN, 1950
,T. RARUD PASS. NEAR L. ARDIBBO, WALLO
SI02
T102
AL203
FE2O3
FEO
MNOMGO
CAU
NA20
K2O
P2O5
H2O+
H2O-
COd
S03
TOTAL
URIC.IilAl
ANALYSIS
47.22
4.01
12.49
8.055.11
.20
6.40
10.06
2.62
1.43
.22
.60
1.20
0.00
0.00
0.00
0.00
0.00
0.00
99.61
WATER-C02-FREE
(100.0)
48.28
4.10
12.77
8.23
5.22
.20
SI
Tl
AL
FL3
FL2
MN
Me
CA
NA
K
ATOMS
*EI6HT
22.06
2.40
6.61
5.63
3.97
.15
3.86
7.19
1.94
1.19
ATOMSNUhBfc'RS (100.0)
17.92
1.15
5.59
2.30
1.63
.06
3.63
4.09
1.93
.69
0.00
0.00
R
R
N
E
C
Cs
I
Y
L
T
L
I
J
D
IN FEMCS =
wtlGHT NORM
(100.0)
2.48
0.00
8.66
22.71
18.46
0.00
0.00
0.00
0.00
24.40
0.00
5.02
O.CO
5.66
4.34
7.78
0.00
0.00
.49
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FtO)
0.00
0.00
8.80
23.07
18.76
0.00
0.00
0.00
0.00
26.30
0.00
1.73
12.94
0.00
0.00
7.90
0.00
0.00
.50
0.00
.58
51
AL
FM
C
ALK
C
MGTI
P
C/FM
113
17.6
48.2
25.9
8.3
7.2
3-COMPONENT
WT.PERCENTS
F 55.74
M 77.11
A 17.15
F 48.26
C 36.89
A 14.85
N 18.57
K 10.13
C 71.30
1221
P0RPHYR1T1C uASA
12.38N 4212h .
0. HItKE-t-.ERLINi
buRE,
1950
?EST OF ASSAtt
SI02
TI02
AL2O3
FE203
FEO
MMO
MOO
CAU
NA20
KP.0
P2O5
H20*
H20-
C02
S03
TOTAL
ANALYSIS
47.56
2.74
15.95
3.06
9.91
.22
3.72
10.36
3.67
1.30
.73
.22
.16
.18
0.00
0.00
0.00
0.00
0.00
99.78
wATER-COz-F
(100
47.93
2.76
16.08
3.08
KEE
.0)
SI
TI
AL
Ft3
FE2
MN
Mti
CA
NA
K
ATOMS
WEIGHT
22.22
1.64
8.44
2.14
7.70
.17
2.24
7.40
2.72
1.08
ATOMS
NUMBERS (100.0)
17.78
.77
7.03
.86
3.10
? 07
2.08
4.15
2.66
.62
0
CH
OH
AB
AN
NF
LC
AC
N5
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGU/MGO+FEO
IN FEhlCS =
WEIGHT NORM
(100.0)
0.00
0.00
7.75
27.53
23.30
2.04
0.00
0.00
0.00
19.21
0.00
0.00
b.45
4.47
0.00
5.23
0.00
0.00
1.61
.41
.51
NON-OXIDATION NORM
IFE203 CONVERTED TO FEO)
0.00
0.00
7.79
24.12
23.44
3.99
0.00
0.00
0.00
19.63
0.00
0.00
13.73
0.00
0.00
5.26
0.00
0.00
1.62
.42
.40
SIAL
FM
C
ALK
K
MG
TI
P
C/FM
QZ
115
22. 8
39.O
26.9
10.7
.19
.34
5.0
.75
.68
-28
3-COMPONENT
KT.PERCENTS
F 5<5.88
M 17.17
A 22.95
f 45.83
C 36.61
A 17.56
N 73.94
K 8.48
C 67.58
1222
ApHYRIC BASALT
09.34N 42.14E,
0. HIEKE-C.ERLIN,
JARSAGORO.
1950
N. FLANKS MT. ABDULLA, HARARGE
SI02
TI02
AL203
FE203
FEO
MNO
MGU
CAO
NA20
K2O
P2U5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
47.88
2.43
14.01
3.62
10.08
? 07
5.39
9.64
2.14
.66
.52
2.20
1.26
.06
0.00
0.00
0.00
0.00
0.00
99.96
VvATER-C02-Fr!EE
(100.0)
49.65
2.52
14.53
3.75
10.45
.07
5.59
10.00
2.22
.68
.54
SITI
ALFt3
Ft2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
22.37
1.46
7.41
2.53
7.84
.05
3.25
6.89
1.59
.55
.23
.03
.01
.02
0.00
45.74
ATOMS
NUMBERS (100.0)
16.40
.70
6.35
1.05
3.?5
.02
3.09
3.97
1.60
.32
.17
61.08
0
CBOR
ABAN
NELC
ACNS
01WO
HYOL
MT
HM
ILTI
RUAP
ccMGU/MGO+FtO
IN FEMICS -
wLlGHT NORM
(100.0)
4.23
0.00
4.05
IB.80
27.61o.oo
0.00
0.00
0.00
15.22
0.00
18. 5 3
0.00
5.45
0.00
4.78
0.00
U.00
1.18
.14
.60
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
.28
0.00
4.08
18.94
27.81
0.00
0.00
0.00
0.00
15.62
0.00
27.13
0.00
0.00
0.00
4.81
0.00
0.00
1.19
.14
.47
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
QZ
116
20.
47.
25.
6.
4.
-6
3-COMPONENT
WT.PERCENTS
F 62.59
M 24.62
A 12.79
F 52.41
C 36.88A 10.71
No. 1222
REMARKS: Hieke-Merlin (1950) gives for this analysis
two summations: 99-46% on p. 16 and 99.94% on p. 26;
neither agrees with the total of oxide values.
MINERALOGY: Groundmass: Zoned An62 (center) to
An54 (rim), augite, very abundant magnetite, partly
devitrified brown glass, some ilmenite, calcite in
cavities.
No. 1223
REMARKS: Published summation is 99.87; CO, trace.
MINERALOGY: Groundmass: Zoned An68 (center) to
An56 (rim), Fe-rich augite, scarce altered olivine,
magnetite, ilmenite, some calcite-filled vesicles.
No. 1224
REMARKS: Republication of analysis 1151 (see remarks
under 1151 for manner of re-adjusting some oxide values).
MINERALOGY: Extremely fine-grained. Phenocrysts:
Very rare An6l-59. Groundmass: Plagioclase,
pyroxene, magnetite, green glass, very rare olivine.
1223
APHYRIC BASALT
10.44N 42.34E, AISHA
0. HItKE-f.ERLIN, 1950
SIO2
TI02
AL2O3
FE203
FEUMNU
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
Okl&IMAL
ANALYSIS
50.32
2.28
12.70
4.00
10.51.11
5.38
9.60
2.94
? 83
.35
.60
.24
0.00
0.00
0.00
0.00
0.00
0.00
99.P6
WATER-C.02-FREE
(100.0)
50.82
2.30
12.83
4.04
10.61
.11
5.43
9.70
2.97
.84
.35
SI
TlAL
FE3FE2
MNMG
CANA
KP
H?H-
Cs
ATOMS
WEIGHT
23.51
1.37
6.72
2.80
8.17
.09
3.25
6.86
2.18
.69
.15
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.86
.64
5.61
1.13
3.30
.03
3.01
3.86
2.14
.40
.11
0CB
ORAB
AN
NELC
ACNS
DI
WOHY
OL
MTHM
ILTI
R'JAP
CC
MGO/MGO+FEO
IN FEMICS =
HEIGHT NORM
(100.0)
2.2a
0.00
4.96
25.17
19.16
0.00
0.00
0.00
0.00
22.25
0.00
15.15
0.00
5.87
0.00
4.37
0.00
0.00
.77
0.00
.59
NUN-OXIDATION NORM
<FE2O3 CONVERTED TO FEO)
0.00
0.00
5.00
25.37
19.31
0.00
0.00
0.00
0.00
22.85
0.00
16.46
5.83
0.00
0.00
4.40
0.00
0.00
.78
0.00
SIAL
FMC
ALK
12218.2
48.5
25.1
8.2
C/FM
QZ
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
N
K
C
61.33
22.74
15.93
52.04
34.43
13.5?
21.99
6.21
71.80
1224
APHYRIC bASALT <REPUHLIC*TION OF 1151**)
O8.3ON 42.53E. MT. FARSO, DAGAMEDO ROAD.
0. HIEKE-KERL1N, 1950
SI02
TI02
AL2O3
FE2O3
FEOMNU
MGO
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
ORlGltjAL
ANALYSIS
50.41
2.58
15.69
3.26
9.53
.22
5.02
9.28
2.44
1.12
.25
.24
0.00
.36
0.00
0.00
0.00
0.00
0.00
100.40
WATER-C02-FREE
(loo.o)
50.51
2.59
15.72
3.27
9.55
.22
5.03
9.30
2.44
1.12
.25
SITl
ALFE3
FE2
MNMG
CANA
KP
H +
H-
ATOMS
HEIGHT
23.55
1.55
8.30
2.28
7.41
? 17
3.03
6.63
1.81
.93
.11
.00
0.00
ATOMS
NUMBERS (100.0)
18.61
6
2
2
3
1
72
83
91
95
07
77
67
75
53
08
0CB
OR
ABAN
NELC
AC
NSDI
woHY
OLMT
HM.IL
TIRJ
AP
CC
MGO/MGO*KLO
in FEfilCS =
WtlGHT NORM
(100.0)
4.01
0.00
6.62
20.65
2B.48
0.00
0.00
0.00
0.00
11.40
0.00
17.P5
0.00
4.73
0.00
4.e9
0.00
0.00
.55
.fl2
.60
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
.57
0.00
6.66
20.78
28.65
0.00
0.00
0.00
0.00
11.68
0.00
25.35
0.00
0.00
0.00
4.92
0.00
0.00
.55
.82
.47
3-COMPONENT
WT.PERCENTS
F 59.85
M 23.49
A 16.66
F 49.90
C 36.21
A 13.89
N 19.00
K 8.72
C 72.27
1225
APHYRIC BASALT (tftPUPLICATION OF 1152)
09.16N 41.45b. w? SUMMIT MT. GAKAWJLATA (TOP OF SUCCESSION) ??*
0. HltKE^.ERLlN. 1950
SI02TI02
AL2O3FE2O3
FF.0MNO
MGOCAO
NA20K20
P2O5H2U*
H20-C02
S03
TOTAL
JRIC.IMALANALYSIS
51.02
.98
15.402.72
10.21
.19
5.048.94
2.731.32
.76
1.100.00
0.00
o.oo
0.000.00
0.000.00
100.41
wATER-C02-F?EE(100.0)
51.37
.99
15.512.74
10.28
.19
5.089.00
2.751.33
.77
SITI
ALF?3
FL2MN
MbCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
23.84
.59
8.151.90
7.94
.15
3.046.39
2.031.10
.33
.01
0.000.00
0.00
44.96
ATUMSNUMbERS (100.0)
18.8"
6
3
2
3
1
2"
7
7(
It
0
7
5
9(
6
2<
61.01
0cn
ORAB
AN
NFLC
ACN5
DI
WOHY
OLMT
HM
IL
TI
R:J
AnCC
MGO/MGOtFEOIN FLKK.5 =
fttlGHT NORM(100.0)
1.290.00
7.K723.31
26.01
0.000.00
0.000.00
U.B6
0.0022.13
0.003-98
0.001.87
0.000.00
1.670.00
.52
NON-OXIDATION NORM(FE2O3 CONVERTER TO FEO)
0.000.00
7.9123.43
26.15
0.000.00
0.000.00
12.06
0.0022.16
4.720.00
0.001.88
0.000.00
1.680.00
.43
NIGGLI
SIAL
FMC
ALK
KM3
TIP
C/FM
01
126
22.
45.
23.
8.
1.
-9
3-C0MP0NENT
WT.PERCENTS
FM
A
F
CA
N
KC
58.7222.89
18.39
49.88
34.4915.67
21.02
10.1668.02
No. 1225
REMARKS: Republication of analysis 1152, but under
different locality; three types of basalt from this region
are discussed, but the analysed one is not distinguished.
No separate determination of H-O-.
MINERALOGY: Very fine-grained. Groundmass:
Labradorite-bytownite, augite, rare altered olivine,
yellow glass, magnetite, ilmenite.
No. 1226
MINERALOGY: Fine-grained, flow-textured. Ground-
mass: An60-58, pyroxene, rarer olivine, magnetite,
apatite; geodes bearing pyroxene, biotite, brown horn-
blende (2V = 80?).
No. 1227
MINERALOGY: Phenocrysts: Anorthoclase (corroded
crystals with secondgeneration anorthoclase and glass
on rims), rare sanidine, aegirine-augite. Groundmass:
K-feldspar, plagioclase, aegirine-augite, common
magnetite, some apatite.
1226
BASALT DYKE (IN ijASEI^ENT)
09.28N 41.55E? *GATE CF HARAR*
0. HIEKE-MERLIN, 1950
HARAR-OIRE DArtA ROAD. HARARGE
SI02
TIU2
AL2O3
FE2O3
FEO
MNO
MGU
CAU
NA20
K20
P205
H20 +
H20-
C02
503
TOTAL
ORIGIMAL
ANALYSIS
51.56
3.04
13.07
2.76
9.82
.26
4.65
fa.36
3.06
1.78
.54
.58
.t)6
o.no
0.00
0.00
0.00
0.00
0.00
100.34
WATER-C02-FKEE
(100.0)
52.13
3.07
13.22
2.79
9.93
.26
4.70
8.45
3.09
1.80
SI
Tl
AL
FE3
F?2
Mm
M3
CA
NA
K
P
H*
H-
C
S
ATOMS
HEIGHT
24.09
I.a2
6.92
1.93
7.63
.20
2.80
5.97
2.27
1.48
.24
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
19.24
.85
5.75
.78
3.07
.08
2.59
3.34
2.21
.85
.17
IN FEMCb =
WclGHT NORM
(100.0)
2.91
0.00
10.66
26.23
16.82
0.00
0.00
0.00
0.00
1B.1H
0.00
14.11
0.00
4.06
0.00
5.S3
0.00
(J.OO
1.19
0.00
.58
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
10.72
26.37
16.91
0.00
o.oo
0.00
0.00
18.56
o.oo
20.26
.10
0.00
o.oo
5.86
0.00
0.00
1.20
0.00
.46
51
AL
FM
C
ALIC
K
MG
TI
p
C/FM
OZ
135
20.1
45.7
23.5
10.7
.28
.40
6.0
.60
.51
-8
3-COMPONENT
WT.PERCENTS
F 57.00
M 21.07
48.80
32.43
18.77
23.18
13.48
63.33
1227
TRAC^IYTIC dLLUio TUFF
09.41N 39.42E, OEf.RA
0. HlfcKE-MEKLIN, 1V53
SIU2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20+
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
63.92
.56
16.86
2.34
1.42
.09
? 41
1.36
8.00
3.92
.16
.56
.60
0.00
0.00
0.00
0.00
0.00
0.00
100.20
WATER-C02-FKEE
(100.0)
64.54
.57
17.02
2.36
1.43
.09
.41
1.37
8.08
3.96
SI
TI
AL
FE3
FE2
MN
?C
CA
NA
<
ATOMS
WEIGHT
29.86
.34
8.92
1.64
1.10
.07
.25
.97
5.94
3.25
ATOMS
NUMBERS (100.0)
22.41
.15
6.97
.62
.42
.03
.21
.51
5.44
1.75
0.00
0.00
0
C<3
OR
AR
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
H?1
IL
TI
RU
AP
CC
PGO/MGO+FEO
IN FEMCS =
iXLlGHT NORM
(100.0)
.69
0.00
23.45
65.50
0.00
0.00
0.00
2.f,6
0.00
3.50
.66
0.00
0.00
2.10
0.00
1.07
0.00
0.00
.35
0.00
.67
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
23.56
65.80
0.00
0.00
0.00
0.00
.70
5.13
0.00
2.03
1.34
0.00
0.00
1.08
0.00
0.00
.36
0.00
.20
3-COMPONENT
WT.PERCENTS
F 23.37
M 2.55
A 74.08
F 22.07
C 7.9H
A 69.95
N 60.24
K 29.52
C 10.24
.1. 90.17
1228
P0RPHYRIT1C TRACHYTE
11.19W 39.40E, UESSIE-QUORAM hoADt NEAR L. HAyk
0. HIEKE-C.ERLIN. 1953
SI02
TI02
AL2O3
FF2O3
FEO
MNO
?AGO
CAO
NA20
K20
P205
H20*
H20-
C02
503
TOTAL
ORIGIHAL
ANALYSIS
64.58
1.14
15.81
1.64
2.95
.10
.52
2.52
5.78
3.72
.34
.65
.27
.30
0.00
0.00
0.00
0.00
0.00
100.32
HATEH-C02-FKEE
(100.0)
65.17
1.15
15.95
1.65
2.98
.10
.52
2.54
5.83
3.75
? 34
SITl
AL
Ffc3
FE.2
MNMG
CANA
<P
H +
H-
CS
0
ATOMS
WEIGHT
30.17
.68
8.37
1.15
2.29
.08
.31
1.80
4.29
3.09
.15
.01
.00
.08
0.00
47.85
ATOMS
NUMBERS (100.0)
22.80
6
3
1
30
58
44
87
03
27
95
96
68
10
62.01
htlGHT KOKM
(1OO.O)
11.57
0.00
22.18
49.32
6.17
0.00
0.00
0.00
0.00
2.12
0.00
2.t2
0.00
2.40
0.00
2.IB
0.00
0.00
.75
.69
NON-OX I OAT I ON NORM
(FE2O3 CONVERTED TO FEO)
9.86
0.00
22.25
49.48
6.19
0.00
0.00
0.00
0.00
2.19
0.00
6.41
0.00
0.00
0.00
2.18
o.oo0.00
.75
.69
NI
SIAL
FMC
ALK.
MGTI
PC/
oz
IN FLMICS =
3-COMPONENT
WT.PERCENTS
F 31.42
M 3.56
A 65.02
F 27.63
C 15.17A 57.19
N 48.09K 30.95
C 20.97
No. 1228
MINERALOGY: Cryptocrystalline. Groundmass: Glass
with An45 and magnetite, scarce apatite, calcite,
altered pyroxene(?).
No. 1229
MINERALOGY: Phenocrysts: Microphenocrysts of An38,
aegirine-augite, and Fe-oxide. Groundmass: Feldspar,
glass, magnetite, aegirine-augite.
No. 1230
REMARKS: Potassic rock.
MINERALOGY: Welded tuff(?). Phenocrysts: Sanidine.
Groundmass: Fluidal glass, with sanidine and Fe-oxides.
1229
PORPHYRITIC TRACHYTE
11.54N 4W48E,
0. HIEKE-J-iERLII.
SIDE GUN.A GRAp.EN, CENTRAL AFAR
SI02
TI02
AL2O3
FE203
FfOMNO
MQO
CAU
NA20
K20
P205
H20+
H20-
C02
S03
TOTAL
ORI&INAL
ANALYSIS
64.68
1.37
12.62
2.85
3.41
.06
1.43
3.64
5.05
3.34
.37
.90
.20
0.00
0.00
0.00
0.00
0.00
0.00
99.92
I*ATER-CO2-FKEE
(100.0)
65.45
1.39
12.77
2.88
3.45
.06
1.45
3.68
5.11
3.38
.37
SITl
ALFE3
FE2
MNMb
CANA
KP
H?H-
C
S
ATOMS
HEIGHT
30.22
.82
6.6B
1.99
2.65
.05
.86
2.60
3.75
2.77
.16
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
23.10
5
1
1
3
1
.37
.31
.77
02
02
76
39
50
52
.11
0CB
ORAB
ANNE
LCAC
NSDI
MO
HYOL
MTHM
IL
TIRU
APCC
MGO/MGO+FEO
IN FEMCS =
WEIGHT NORM
(100.0)
15.77
0.00
20.03
43.34
1.86
0.00
0.00
0.00
0.00
11.16
.20
0.00
0.00
4.19
0.00
2.63
0.00
0.00
.82
0.00
.73
NON-OX I DAT I UN NORM
(FE2O3 CONVERTED TO FEO)
12.80
0.00
20.14
43.59
1.87
0.00
0.00
0.00
0.00
12.20
0.00
5.94
0.00
0.00
0.00
2.65
0.00
0.00
.82
0.00
.36
FMC
ALKK
MG
TI
28.1
15.3
27.5
.30
.30
4.0
3-COMPONENT
WT.PERCENTS
F 38.93
M 8.89
A 52.18
F 34.23
C 19.90
A 45.87
N 41.98
K 27.76
C 30.2h
1230
SANIDINE TRACHYTE
10.06N 42.40E, S.k.
0. HlbKE-hEKLIN, 1953
L.ASE ST. tLLIS, HARARGE
SI02
TI02
AL203
FE2O3
FEUMNO
MGJ
CAO
NA20
K20
P2O5
H20+
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
64.96
.68
14.05
6.88
.43
0.00
.36
.36
4.91
5.49
.24
.40
1.08
0.00
0.00
0.00
0.00
0.00
0.00
99.84
*ATER-C02-FREE
(100.01
66.04
.69
14.28
6.99
.44
0.00
.37
.37
4.99
5.58
.24
SI
TIAL
Ft3FE2
MNMG
CANA
K
P
H*H-
cs
ATOMS
*EIGHT
30.35
.41
7.43
4.81
.33
0.00
.22
.26
3.64
4.56
.10
.00
.01
0.00
0.00
ATOMS
NUMBERS (100.0
23.28
5
1
0
3
2
18
93
86
13
00
19
14
41
51
07
0
CBOR
ABAN
NE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
WEIGHT NORM
(100.0)
14.92
0.00
33.07
42.34
.00
0.00
0.00
0.00
0.00
0.00
0.00
.91
0.00
0.00
7.01
.93
.19
.09
.53
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
10.38
0.00
33.52
42.92
.00
0.00
0.00
0.00
0.00
.34
0.00
10.97
0.00
o.oo0.00
1.33
0.00
0.00
.54
0.00
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
282
35.
26.
1.
35.
2.
38
3-COMPONENT
WT.PERCENTS
FM
A
F
C
40.45
1.99
57.55
40.45
1.99
45.63
51.02
MGO/MGO*FfO
IN FEMCS =
1231
SANIDINE TRACHYTE10.08H 42.49E, 5.E. i.ASE KT. ELLIS, HARARsE
0. HltKE-h.EHLlN. 1953
5102
TIU2
AL203
FF203
FEO
MNO
MGCl
CAO
NA20
K2U
P2O5
H2G*
H20-
C02
503
TOTAL
UKI&IfJAL
ANALYSIS
66. RO
.40
15.07
4.64
.14
0.00
.45
.56
4.P.8
b.t9
.09
.56
.44
0.00
0.00
0.00
0.00
0.00
0.00
99.92
?ATEfc-C02-FKEE
(100.0)
67.53
.40
15.23
4.69
.14
0.00
.45
.57
4.93
5.95
.09
SITI
ALFL3
Ffc2
MN
MCj
CA
Hh
KP
H*H-
CS
0
ATOMS
WEIGHT
31.21
.24
7.97
3.25
.11
0.00
.27
.40
3.62
4.89
.04
.01
.01
0.00
0.00
47.91
ATOMS
NUMBERS (100.0)
23.59
.11
6.27
1.24
.04
0.00
.74
.21
3.34
2.66
.03
62.?8
0
CB
OR
AD
ANN?
LC
ACNS
DI
WO
HYOL
MT
HM
ILTI
RU
AP
CC
WEIGHT NOhM
(100.0)
14.42
0.00
35.28
41.85
1.75
0.00
0.00
0.00
0.00
0.00
0.00
1.14
0.00
0.00
4.70
.30
.26
.10
.20
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
11.41
0.00
35.60
42.23
1.77
0.00
0.00
0.00
0.00
.46
0.00
7.55
0.00
o.oo0.00
.77
0.00
0.00
.20
0.00
NIGGLI
SIAL
FMC
ALKK
MG
TIP
C/FM
OZ
299
39.
19.
2.
38.
1.
47
MGO/MG0*FEO
IN FEMC5 =
3-COMPONENT
WT.PERCENTS
F 29.R7
43.07
51.994.94
No. 1231
REMARKS: MnO trace; potassic rock.
MINERALOGY: Phenocrysts: K-feldspar (sanidine?).
Groundmass: Trachytic texture, sanidine, plagioclase,
quartz, haematite, limonite.
No. 1232
MINERALOGY: Phenocrysts: Rare sanidine/anorthoclase.
Groundmass: Fluidal glass, quartz, feldspar, aegirine-
augite, rare magnetite, limonite, calcite.
OTHER INFORMATION: Derived from the Ayelu volcanic
center (see also 1237).
No. 1233
REMARKS: Originally published by O. Hieke (1941).
Potassic rock.
MINERALOGY: Vitric crystal tuff with lenses and layers
of obsidian schlieren. Phenocrysts: Corroded quartz,
anorthoclase (2V 38 = 40?), brown hornblende. Ground-
mass: Yellow-brown glass, cossyrite, magnetite,
microlites of arfvedsonite-riebeckite(?).
1232PORPHYRITIC QUARTZ TRACHyTE (WELDED TUFF)
10.ION 40.39E. 2KK E. OF GAwANI. AFAR
0. HIEKE-MERLIN. 1953
SIU2TI02
AL203FE2O3
FEOMNO
MGO
CAONA20
K20P2O5
H20*H20-
C02S03
TOTAL
ORIGINALANALYSIS
67.12
.27
14.451.08
1.45
.11
.26
2.086.29
4.38
.09
1.41
.46
.42
0.000.00
0.000.00
0.0099.67
WATER-C02-FREE(100.0)
68.78
.28
14.811.11
1.49
.11
.27
2.136.45
4.49
.09
SITI
ALFE3
FE2MN
MGCA
NA
KP
H+
H-C
S
ATOMS
WEIGHT
31.36
7
1
1
4
3
0
.16
65
76
13
09
16
49
67
64
04
02
01
11oo
ATOMSNUMBERS (100.0
23.83
.07
6.05
.29
.43
.03
.14
.79
4.331.99
.03
0CH
ORAB
ANNE
LCAC
NS
DIWO
HY
OLMT
HMIL
TIR'J
A"
CCMG0/MG0*FLO
IN FEMCS =
WEIGHT NORM(100.0)
11.580.00
26.4850.93
0.000.00
0.003.10
0.00
6.04.12
0.00
o.oo.05
o.oo.52
0.00o.oo
.20
.96
.26
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
12.050.00
26.5451.03
0.000.00
0.000.00
.82
6.380.00
1.47
0.000.00
0.00
.52
0.000.00
.20
.98
.17
C/FM
QZ
3-COMPONENTWT.PERCENTS
F 18.80
34.3516.31
1233PAHTELLE&ITIC VITRIC TUFF
09.15rt 40.45E, MlESSG (tuARRY P,Y RAILWAY) 1
0. HlEKE-r.ERLINt 1953 (0. HIEV.E, 1941)
SI02
TI02
AL203
FE203
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORICINAL
ANALYSIS
68.80
.15
9.643.90
2.18.19
.57
1.28
3.975.00
.13
4.00
.38
0.00
0.000.00
0.00
0.00
0.00100.19
k?ATER-C02-F?EE
(100.0)71.81
.16
10.064.07
2.28
.20
.59
1.34
4.14
5.22
.14
SI
TIAL
FE3Ft2
MNMG
CA
NA
KP
H*H-
Cs
ATOMS
WEIGHT
32.14
.09
5.102.73
1.69
.15
.34
.91
2.95
4.15
.06
.05
.00
0.000.00
ATOMSNUMBERS (100.0)
25.23
4
1
2
2
04
17
08
67
06
31
50
82
34
04
Q
C3OR
A3AN
NE
LC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CCMGO/MGOtFEO
IN FEMICS =
WEIGHT NOKM
(100.0)26.42
0.0030.92
22.640.00
0.00
0.00
11.020.00
b.000.00
3.000.00
.40
0.00
.30
0.000.00
.30
0.00
.32
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
28.07
0.0031.17
22.820.00
0.00
0.00
0.002.93
5.150.00
9.260.00
0.000.00
.30
0.000.00
.30
0.00
.16
SIAL
FMc
ALKK
MGTI
PC/FM
OZ
345
28
29
6
35
124
-COMPONENTT.PERCENTS
38.92
37.23
7. 8454.93
38.7348.78
12.49
123*
COMENDITE
08.41N 39.O2E. QUARRY AT KM54. ADDIS ABAB*-MOjjO ROAD. SHOA
0. HIEKE-f-'EKLIN, 1953
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20*
H2U-
C02
503
TOTAL
ORIGINAL
ANALYSIS
70.20
.38
11.12
3.77
.85
.17
.36
.R8
4.71
5.58
.04
.88
1.10
0.00
0.00
0.00
0.00
0.00
0.00
100.04
WATER-C02-FKEE
(100.0)
71.59
.39
11.34
3.84
.87
.17
.37
.90
4.80
5.69
.04
SITI
At.FL3
Ft2
MN
MGCA
NAK
P
H+
H-C
S
0
ATOMS
WEIGHT
32.80
.23
5.aa
2.64
.66
.13
.22
.63
3.49
4.63
.02
.01
.01
0.00
0.00
48.69
ATOMS
NUMBERS (100.0)
25.01
.10
4.67
1.01
? ?5
.05
.19
.34
3.25
2.54
.01
62.57
0C8
ORAt)
ANNE
LC
ACNS
DIWO
HY
OL
MT
H"
1L
TIRu
A^>
CC
MGO/MljO?Hr.U
IN FthlCS =
WEIGHT NORM
(100.0)
23.40
0.00
33.72
26.59
0.00
0.00
0.00
11.16
.35
3.54
0.00
.43
0.00
0.00
0.00
.74
0.00
0.00
.09
0.00
.4f
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
25.33
0.00
33.97
26.78
0.00
0.00
0.00
0.00
3.32
3.72
0.00
6.04
0.00
0.00
0.00
.74
0.00
0.00
.09
0.00
.15
353
33
3-COMPONENT
WT.PERCENTS
F 30.26
M 2.36
A 67.39
F 29.26
42.1749.96
7.88
NO. 1234
REMARKS: Potassic rock.
MINERALOGY: Aphyric. Groundmass: Sanidine, quartz,
plagioclase, aegirine, limonite, cossyrite(?).
No. 1235
REMARKS: Originally published by O. Hieke (1941).
MINERALOGY: Wholly glassy with rare signs of
devitrification.
OTHER INFORMATION: This obsidian occurs in flow-
banded vitric trachyrhyolite.
No. 1236
REMARKS: Potassic rock.
MINERALOGY: Porphyritic, with some micropegmatitic
texture. Phenocrysts: Sanidine, barkevikite-riebeckite
more common than aegirine-augite, both rimmed with
aegirine. Groundmass: sanidine, quartz, riebeckite,
aegirine, cossyrite (with aegirine rims), iddingsitised
Fa88 (with aegirine rims), limonite; no glass, no
plagioclase.
1235
COMENLiITIC OhSIOlAN
O9.O3N 38.45N, KIDOTTA RCERETO, tNTOTTO, N. OF ADDIS
0. HIEKE-I.ERLIN, 1953 (0. HIEkE, 1941)
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H2G*
H2C1-
C02
S03
CL
F
TOTAL
ORIGINAL
ANALYSIS
70.88
.53
10.59
1.42
4.41
.11
.36
.48
6.21
4.75
.05
.16
.07
0.00
0.00
.18
.17
0.00
0.00
100.37
V.ATER-C02-FREE
(100.0)
71.03 SI
.53 TI
10.61 AL
1.42 FE.3
4.42 FE2
.11 MN
.36 M&
.48 CA
6.22 NA
4.76 *
.05 F
ATOMS
WEIGHT
33.12
.32
5.60
.99
3.43
.09
.22
.34
4.61
3.94
.02
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
24.88
.14
4.38
.38
1.30
.03
.19
.18
4.23
2.13
.01
0
CB
OR
AR
ANNE
LC
ACNS
DIWO
HY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
HEIGHT NORM
(100.0)
24.60
0.00
28.21
28.04
0.00
0.00
0.00
..13
..67
.84
).00
'.40
).00
J.00
).00
.01
>.00
j.00
.11
0.00
14
NON-OX 1 DAT I ON NORM
(FE203 CONVERTED TO FEO
25.31
0.00
28.29
28.11
0.00
0.00
0.00
0.00
5.78
1.85
0.00
9.54
0.00
0.00
0.00
1.01
0.00
0.00
.11
0.00
.11
C/FM
OZ
334
29.4
25.4
2.4
42.7
3-COMPONENT
WT.PERCENTS
F 33.99
M 2.10
A 63.91
F 33.76
54.20
41.52
4.20
1236
PANTELLERITIC WELDED TuFh
09.15N 40.45E? MIESSO (SLOPES OF ASSApOT).
0. HltKE-CERLlN. 1953
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAl
ANALYSIS
72.12
.20
8.96
3.95
2.42
.11
.46
1.26
4.13
5.24
.13
.72
.48
0.00
0.00
0.00
0.00
0.00
0.00
100.18
WATER-C02-FHEE
(100.0)
72.86
.20
9.05
3.99
2.44
.11
.46
1.27
4.17
5.29
.13
SITI
ALFE3
FE2
MN
Mi
CA
NA
K
P
H*
H-C
S
ATOMS
WEIGHT
33.69
.12
4.74
2.76
1.88
.09
.28
.90
3.06
4.35
.06
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0
25.61
3
1
2
2
05
75
06
72
03
24
48
84
38
04
0
CR
OR
ABAN
NELC
AC
NSDI
WO
HY
OL
VT
HI
ILTI
RU
AP
CC
IN FEMCS =
HEIGHT NORM
(100.0)
30.28
ci.oo
31.37
17.03
0.00
0.00
0.00
11.58
1.22
4.79
0.00
3.06
0.00
0.00
0.00
.38
0.00
0.00
? ?9
0.00
.Zt
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
32.33
0.00
31.61
17.16
0.00
0.00
0.00
0.00
4.31
4.91
0.00
9.00
0.00
0.00
0.00
.39
0.00
0.00
.29
0.00
.13
c
ALK
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 39.32
38.8549.29
11.85
1237
CCWENulTIC ObSlDlAN (IN ElDED TUFF)
10.05N 40.39E, ?. FOOT OF MT. A.jELU,
0. HIEKE-MERLIN, 1953 (O. HIEKE, 1941)
SI02
TIU2
AL2O3
FE2O3
FEU
MNO
MGO
CAU
NA2O
K2O
P2O5
H2O*
H2O-
C02
503
CL.
F
TOTAL
ORIGINAL
ANALYSIS
72.82
.30
10.30
.44
2.99
.03
.22
1.48
b.69
4.67
0.00
.10
.04
0.00
0.00
.30
.11
0.00
0.00
100.49
WATER-C02-FREE
72.86
.30
10.31
.44
2.99
.03
.22
1.48
6.69
4.67
0.00
(100.0)
SITI
ALFt3
FE2MM
Mo
CANA
KP
H*H-
Cs
0
ATOMS
HEIGHT
34.02
? IB
5.45
.31
2.32
.02
.13
1.06
4.96
3.88
0.00
.00
.00
0.00
0.00
47.74
ATOMS
NUWHtWS (100.0)
25.30
.08
4.22
.12
.87
.01
.11
.55
4.51
2.07
0.00
62.17
0CB
ORAR
ANNE
LCAC
NSDI
WOHY
OLMT
HMIL
TIRU
APcc
MGO/MGO+FEO
IN FEMICS =
WtlGHT NORM
(100.0)
28.21
0.00
27.69
26.95
0.00
0.00
0.00
1.28
6.61
6.47
0.00
2.23
0.00
0.00
0.00
.57
0.00
0.00
0.00
0.00
.12
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
28.43
0.00
27.72
26.97
0.00
0.00
0.00
0.00
6.95
6.48
0.00
2.88
0.00
0.00
0.00
.57
0.00
0.00
o.oo0.00
.11
NIGGLl
SIAL
FMC
ALKK
MGTI
PC/FM
OZ
358
29.h
15.7
7.8
46.6
.31
.10
1.1
0.00
.50
121
3-COMPONENT
WT.PERCENTS
F 22.85
M 1.47
A 75.6ft
F 71.OS
52.10
36.37
11.53
NO. 1237
MINERALOGY: Groundmass: Glass with abundant
crystallites of anorthoclase; magnetite, uncommon
aegirine-augite; no quartz(?).
No. 1238
MINERALOGY: Spherulitic texture. Phenocrysts:
Strongly resorbed K-feldspar phenocrysts, composed of
anorthoclase (2V=50?) accreted on orthoclase (2V=6l?).
Groundmass: Spherulites composed of orthoclase(?) and
chalcedony; haematite, magnetite, zircon; zeolites in
cavities.
No. 1239
REMARKS: Originally published by O. Hieke (1941).
MINERALOGY: Groundmass: Fluidal glass; crystallites
of feldspar, apatite, zircon, green pyroxene.
OTHER INFORMATION: This rock forms characteristic
cupolas, presumably formed by trapped gases.
1238
COMENuITE
10.41N 39.52E.
0. HIEKE-MERLIN,
MOFA, 45KM 5. OF KOMBOLCHA (ON ROAD)
1953
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
73.08
.45
11.61
2.48
.72
.09
.88
1.64
3.80
t.04
.15
.82
.41
0.00
0.00
0.00
0.00
0.00
0.00
100.17
WATER-C02-FREE
(100.0)
73.86
.45
11.73
2.51
.73
.09
.89
1.66
3.84
4.08
.15
SITl
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
s
ATOMS
WEIGHT
34.14
.27
6.14
1.73
.56
.07
.53
1.17
2.82
3.35
.07
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
25.54
4
2
1
12
78
65
21
03
46
61
58
80
04
0
CBOR
ABAN
NELC
ACNS
DI
WO
HYOL
MT
hW
ILTI
RU
APCC
MGO/MGO-i-FtlO
IN FtPICS =
WEIGHT NORM
<100.0)
32.25
0.00
24.20
32.58
2*66
0.00
0.00
0.00
0.00
3.66
0.00
.53
0.00
1.33
1.60
.66
0.00
0.00
.33
0.00
1.00
NON-OXIDATIUN NORM
<FE2O3 CONVERTED TO FEO)
30.35
0.00
24.32
32.74
2.67
0.00
0.00
0.00
0.00
4.00
0.00
4.72
0.00
0.00
0.00
.67
0.00
0.00
.33
0.00
.39
SIAL
FM
CALK
MG
TlP
C/FM
389
36.
20.
9.
33.
1.
3-COMPONENT
WT.PERCENTS
F 26.85
25.24
12.93
61.83
40.08
42.62
17.30
1239
CONItNi/ITIC ObSIOlAN
11.53N 41.08E, 23H1 ?. FROV; SARDO, CENTRAL AFAK
0. HlEKE-h.ERLlN 1953 (O. HIEr.E, 1941)
SIU2
TI02
AL203
FE203
FEOMNU
MGO
CAO
NA2O
K2O
P205
H20*
H2U-
C02
S03CL.
F
TOTAL
ANALYSIS
73.80
.22
12.10
.82
1.56
.01
.22
.84
5.10
4.95
.08
.22
.09
0.00
0.00
.19
.06
0,00
0.00
100.26
WATER-C02-FREE
74.02
.22
12.14
.82
1.56
.01
.22
.84
5.12
4.96
.08
(100.0)
SITI
ALFL3
FE2MN
MGCA
NAK
P
H+
H-C
S
ATOMS
WEIGHT
34.48
.13
6.40
.57
1.21
.01
.13
.60
3.78
4.11
.03
.00
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.54
.06
4.94
.21
.45
.00
.11
.31
3.42
2.19
.02
0
CBOR
AI3AN
NE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+hEO
IN FtMCS =
WEIGHT NOPM
(100.0)
26.83
0.00
29.43
34.74
0.00
0.00
0.00
2.39
1.38
3.22
0.00
1.42
0.00
0.00
0.00
.42
0.00
0.00
.18
0.00
.22
NON-OX I DAT I UN NORM
(FE2O3 CONVERTED TO FEO)
27.24
0.00
29.47
34.80
0.00
0.00
0.00
0.00
2.02
3.25
0.00
2.62
0.00
0.00
0.00
.42
0.00
0.00
.18
0.00
.16
3-COMPONENT
WT.PERCENTS
F 18.81
M 1.74
A 79.45
F 17.94
46.83
45.45
CEu
1O.33N 42.39E.
0. HItKE-MERLIN,
MIL MlLLACAT.
1953
ARAwEINA, HARARQE
SI 02
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2
SOJ
TOTAL
OKICJINAL
ANALYSIS
74.12
0.00
11.96
1.29
.36
0.00
.52
1.24
2.42
5.71
0.00
1.46
1.04
0.00
0.00
0.00
0.00
0.00
0.00
100.12
V.ATER-C02-FHEE
(100.0)
75.93
0.00
12.25
1.32
.37
0.00
.53
1.27
2.48
5.85
0.00
SITI
AL
Ft3FE2
MMMa
CANA
KP
H?H-
cs
0
ATOMS
WEIGHT
34.63
0.00
6.33
.90
.28
0.00
.31
.89
1.80
4.74
0.00
.02
.01
0.00
0.00
50.22
ATOMS
NUMBERS (100.0)
26.18
0.00
4.98
.34
.11
0.00
.27
.47
1.66
2.58
0.00
63.41
0
CB
ORAB
AN
NFLC
AC
NS
DI .
WO
HYOL
MT
H'-1
ILTl
Rll
AP
ccKGO/MGO+t-tO
IN FthlCS -
rttl&HT NORM
(100.0)
35.74
0.00
34.67
21.03
4.97
0.00
0.00
0.00
0.00
1.05
0.00
.84
0.00
1.19
.50
0.00
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
34.62
0.00
34.76
21.09
4.98
0.00
0.00
0.00
0.00
1.15
0.00
3.41
0.00
0.00
o.oo0.00
0.00
0.00
0.00
0.00
.40
NlGGLl
SIAL
FMC
ALK<
M6TI
P
C/FM
QZ
451
42.<
12.
8.
36.
.
0.
,]
.8
0.00
.65
204
3-COMPONENT
WT.PERCENTS
F 16.07
M 5.05
A 78.93
F 14.97
C 11.25
A 73.77
N 75.83
K 60.94
C 13.23
No. 1240
REMARKS: TiO2, MnO, p2?5' CO2 traces; strongly
potassic rock.
MINERALOGY: Microspherulitic texture. Groundmass:
Spherules of orthoclase (sanidine?) and chalcedony;
quartzo-feldspathic mosaic between spherules; some
haematite, limonite, calcite.
No. 1241
MINERALOGY: Phenocrysts: Anhedral quartz, euhedral
sanidine. Groundmass: Quartz, sanidine titaniferous
sodic hornblende, magnetite, limonite, apatite, glass.
No. 1242
REMARKS: P2O5 trace.
MINERALOGY: Phenocrysts: Corroded quartz, sanidine
(2V=41?). Groundmass: Quartz, sanidine, albite,
aegirine-augite, barkevikite.
1241
P0RPHYRIT1C CONiE
11.2OiM 39.41E,
0. HIEKE-MEKLIN,
LAKE HAYK. WALLO
SIU2
TI02
AL2O3
FE203
FED
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
77.72
.48
10.19
1.42
1.03
.04
.22
.14
3.59
4.58
.03
.54
.28
0.00
0.00
0.00
0.00
0.00
0.00
100.26
f^ATER?1
78.16
.48
10.25
1.43
1.04
.04
.22
.14
3.61
4.61
.03
C02-FREE
(100.0)
SI
TI
AL
FE3
FE2
MN
Mb
CA
NA
K
P
H+
H-
C
S
ATOMS
HEIGHT
36.31
.29
5.39
.99
.80
.03
.13
.10
2.66
3.80
.01
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
26.67
.12
4.15
.37
.30
.01
.11
.05
2.41
2.02
.01
0
CB
OR
AB
AN
NE
LC
AC
NSDI
WO
HY
OL
MT
HM
IL
TI
RU
APcc
MGO/MGO+fEO
1.-4 FEK.ICS =
WEIGHT NORM
(1OO.0)
39.35
0.00
27.30
27.03
0.00
0.00
0.00
3.1R
0.00
.44
o.oo
1.24
0.00
.48
O.OO
.92
0.00
0.00
.07
0.00
.44
NON-OXIDATION NORM
(FE2O3 CONVEKTED TO FEO)
39.60
0.00
27.38
27.10
0.00
0.00
0.00
0.00
.84
.46
0.00
3.64
0.00
0.00
0.00
.92
0.00
0.00
.07
0.00
.18
C/FM
02
3-COMPONENT
WT.PERCENTS
F 22.60
M 2.03
A 75.37
F 22.77
C 1.30
A 75.93
N 43.70
K 55.11
1242
PORPHYRtTIC COMEMDlTE (HITHIN TRAP SERIES) uSHEET?
11.31N 39.36E. UTCHALI, ViALLO
0. HIEKE-hERLIN, 1953
SI02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H2U*
H20-
C02
503
TOTAL
OKIGINAi.
ANALYSIS
79.OS
.48
8.72
1.57
1.18
.06
.18
? 30
3.40
4.09
0.00
.53
.25
0.00
0.00
0.00
0.00
o.oo
0.00
99.P4
ATER-C02-F*EE
(100.0)
9.83
.48
8.80
1.58
1.19
.06
.18
.30
3.43
4.13
0.00
SI
TI
AL
FE3
Ft2
MN
Mb
CA
NA
K
P
H+
H-
C
S
ATOMS
WEIGHT
36.95
.29
4.61
1.10
.92
.05
.11
.21
2.52
3.40
0.00
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
27.44
3
2
1
0
.13
57
41
34
02
09
11
29
81
00
0
CB
OR
AB
AN
NE
LC
AC
NSDI
MO
HY
OL
MT
H'4
IL
TI
RU
AP
CC
MGG/MGOtFEO
IN FtMICS =
HEIGHT NORM
(100.0)
44.78
0.00
24.47
22.25
0.00
0.00
0.00
4.60
.38
1.30
0.00
1.29
0.00
0.00
0.00
.92
0.00
0.00
0.00
0.00
.2e
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
45.64
0.00
24.55
22.32
0.00
0.00
0.00
0.00
1.60
1.33
0.00
3.64
0.00
0.00
0.00
.92
0.00
0.00
0.00
0.00
.13
569
37.0
18.0
2.3
42.7
.44
3-COMPONENT
WT.PERCENTS
F 26.391
43.65
52.50
3.85
1243
ANKARAMITIC UASALT
15.21N 44.10E, J. ASStR, SANA, YE?l?N
N.M. SHUKRI AND E.Z. BA5TA, 1955
SI 02
TI02
AL2O3
FE203
FEU
MNO
MGO
CAO
NA20
K2U
P2O5
H20 +
H2U-
C02
S03
TOTAL
OR It, INA[.
ANALYSIS
39.72
3.00
13.03
.72
13.64
.03
11.32
14.04
1.35
.17
.20
2.R8
0.00
.14
0.00
0.00
0.00
0.00
0.00
100.44
WATER-C02-FREE
(100.0)
40.77
3.08
13.38
.74
14.21
.03
11.62
14.41
1.39
.17
.21
SITI
ALFE3
FE2MN
MGCA
N*K
P
H+
H-C
s
0
ATOMS
WEIGHT
18.56
1.80
6.89
.50
10.76
.02
6.83
10.03
1.00
.14
.09
.03
0.00
.04
0.00
43.74
ATOMS
NUMBERS 1100.0)
15.41
5
4
6
5
1
88
96
21
50
01
56
84
02
08
07
59. 48
SI02 LEFIC1T
0
CBOH
AHAN
NELC
ACNS
DI
WO
HY
OL
I*T
HM
ILTI
RUAP
CC
MGO/MGO+FEU
IN FE.MCS =
-1.46
fctlGHT NOFiM
(100.0)
0.00
0.00
0.00
0.00
29.69
6.35
? ei
0.00
0.00
32.50
0.00
0.00
24.47
1.07
0.00
5.83
0.00
0.00
.45
.33
.6?
-1.84
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
0.00
0.00
29.73
6.36
.81
0.00
0.00
32.62
0.00
0.00
25.74
0.00
0.00
5.84
0.00
0.00
.45
.33
.63
N1GGLI
SIAL
FM
CALK
KMG
TIP
C/FM
QZ
74
14.
54.
28.
2.
4.
-36
3-COMPONENT
WT.PERCENTS
F 53.14
M 41.31
A 5.55
8.6R
1.09
90.23
No. 1243
REMARKS: No separate determination of H2O-.
MINERALOGY: Phenocrysts: Diopside-augite and
titanaugite, fresh olivine Fa 11, with bowlingite rims.
Groundmass: Augite, olivine, labradorite microlites,
magnetite.
OTHER INFORMATION: Mode: 23% labradorite, 49.5%
augite, 1 3. 5% olivine, 14% magnetite.
No. 1244
MINERALOGY: Phenocrysts: Large diopside (or
diopside-augite) and younger zoned titanaugite, olivine.
Groundmass: Augite, olivine, magnetite, labradorite
microlites.
OTHER INFORMATION: Mode: 14% labradorite, 62%
pyroxene, 7. 5% magnetite, 16.5% serpentine (mostly
after olivine).
No. 1245
REMARKS: CO2 trace.
MINERALOGY: Groundmass: Pyroxene more abundant
than olivine, magnetite, labradorite with intersertial
glass.
OTHER INFORMATION: Mode: 31% labradorite, 28%
pyroxene, 6% glass, 15. 5% olivine, 19. 5% magnetite.
1244
ANKARAMITL
15.03N 43.56E, MAFHAQ, YEMEN
N.M. SHUKkl AND E.Z. BASTA, 1955
SI02
TI02
AL2O3
FE203
FEUMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO^SO3
TOTAL
ORIGINAL
ANALYSIS
42.62
2.54
11.31
8.25
5.03
.27
8.24
14.87
1.25
.89
.33
2.96
.99
.51
0.00
0.00
0.00
0.00
0.00
100.06
WATER-C02-FHEE
(100.0)
44.58
2.66
11.83
8.63
5.26
.28
8.62
15.55
1.31
.93
SITI
ALFt3
FE2MM
Mo
CANA
<
ATOMS
WEIGHT
19
1
5
5
3
4
10
91
52
98
77
91
21
97
63
93
74
ATOMSNUMBERS (100.0)
16.7
.7
5.2'
2.4
1.6
? 0
4.8'
6.2-
.9
.4
t
r
0Cfl
ORA8
AN
NELC
ACNS
DI
WOHY
OL
MT
ILTI
RiJ
A^CC
MGO/MGOtf-L.0
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
5.48
11.02
23.51
0.00
0.00
0.00
0.00
37.37
0.00
3.48
.41
10.16
1.59
5.01
0.00
0.00
.75
1.21
1.00
NON-OXIDATION NORM
(KE203 CONVERTED TO FEO)
0.00
0.00
5.57
4.13
23.90
3.83
0.00
0.00
0.00
40.19
0.00
0.00
15.28
0.00
0.00
5.10
0.00
0,00
.76
1.23
.60
c
AUK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 56.1*
H 34.A3
A 9.04
43.84
49.09
7.07
5.23
B7.42
15.34N 44.05E.
N.M. SHUKkl AND
HAl.A, YE.-XN
.2. BAbTA, 19
SI02
TI02
AL2O3
FE2O3
FEOMNU
MGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2SO3
SCL
TOTAL
ANALYSIS
44
1
14
2
9
5
10
2
1
1
6
0
0
0
0
100
04
30
91
26
36
18
79
41
63
16
15
80
60
00
00
055
075"
00
00
72
nATER-C02-FREE
(100.0)
47.26
1.39
16.00
2.43
10.04
.19
6.21
11.17
2.82
1.24
1.23
SITI
AL
Ffc3
FE2MN
MbCA
NAK
P
ATOMS
WEIGHT
20.5a
.78
7.89
1.5H
7.28
.14
3.49
7.44
1.95
.96
.50
ATOMS
NUMBERS (100.0)
17.46
.39
6.97
.68
3.11
.06
3.43
4.42
2.02
.59
.39
0.00
0.00
0
Cfi
09
ARAN
NELC
ACNS
orwo
HYOL
MT
H*t
ILTI
PI)
AP
CC
MG0/MGO*FI?O
Ili FEMICS =
HEIGHT NORM.
(100.0)
0.00
0.00
7.37
22.71
27.27
.66
0.00
0.00
0.00
I/.33
0.00
0.00
15.79
3.52
0.00
2.65
0.00
O.CO
2.70
0.00
.58
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
7.41
20.01
27.40
2.18
0.00
0.00
0.00
17.61
0.00
0.00
20.03
0.00
0.00
2.66
0.00
0.00
2.71
0.00
? 50
SIAL
FM
C
ALKK
MGTi
p
C/FM
QZ
106
21.1
44.1
26.9
7.9
.11
.47
2.3
1.17
.61
-26
3-COMPONENT
WT.PERCENTS
F 54.81
M 27.31
A 17.88
F 45.00
C 40.32A 14.68
1246
OLIVINE bASALT
13.35N 44.OOE, TA
N.M. SHUKkl Aub L.I.
-Iz, YEMEN
UASTA, 1955
ST02
TI02
AL203
FE2O3
FEO
MNO
MSO
CAO
NA20
K2O
P2U5
H2U*
H2O-
C02
S03
TOTAL
0
CBOR
AH
ANNF
LCAC
NS
DIWO
HYOL
MT
HV
ILTI
An
CC
ORIGINAL
ANALYSIS
45.06
5.20
lfa.70
4.98
7.74
.10
3.25
6.90
3.71
.52
.32
2.33
0.00
1.33
0.00
0.00
0.00
0.00
0.00
100.14
WEIGHT fiORM
(100.0)
2.57
0.00
3.15
32.lh
27.95
0.00
0.00
0.00
0.00
5.35
0.00
7.51
0.00
7.40
0.00
10.09
0.00
0.00
.72
3.10
*ATER-C02-FRtE
(100.0)
46.70
5.39
17.31
5.16
8.02
.10
3.37
9.22
3.85
.54
.33
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.IB
32.47
28.23
0.00
0.00
0.00
0.00
5.73
0.00
8.07
8.28
0.00
0.00
10.19
0.00
0.00
.72
3.13
SITI
ALFt3
FE2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
21.05
3.12
8.84
3.48
6.02
.08
1.96
6.36
2.75
.43
.14
.03
0.00
.36
0.00
45.52
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/Frt
OZ
ATOMS
NUMBERS
17.31
1.50
7.56
1.44
2.49
.03
1.86
3.66
2.76
.26
.10
61.01
117
25.6
39.4
24.8
10.2
.OH
.3?
10.2
.35
.63
-24
(100.0)
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
N
KC
D.I.
62.97
16.09
70.94
49.21
34.43
16.36
28.2h
3.96
67.7R
79.65
In FEMCS =
No. 1246
REMARKS: No separate determination of H^O-.
MINERALOGY: Phenocrysts: Labradorite, titanaugite,
olivine Fal8. Groundmass: Same minerals as pheno-
crysts, plus Fe-oxides.
OTHER INFORMATION: Mode: 62. 2% labradorite,
13. 5% pyroxene, 8. 1% olivine, 5.4% serpentine and
chlorite, 10.8% magnetite and ilmenite.
No. 1247
REMARKS: No separate determination of H^O-.
MINERALOGY: Phenocrysts: An58, and titanaugite
together make up about 30% of rock. Groundmass: An50
microlites, titanaugite, magnetite, rare glass, chlorite,
calcite, epidote.
OTHER INFORMATION: Mode: 50% labradorite, 12%
augite, 22% magnetite (and ilmenite), 8% chlorite,
8% calcite and epidote.
No. 1248
REMARKS: CO2 trace.
MINERALOGY: Groundmass: Vesicular black glass, with
minute magnetite(?), few laths labradorite, some
olivines, rare titanaugite.
OTHER INFORMATION: Mode: 11.8% labradorite, 17.6%
olivine, 70. 6% glass and iron-ores.
1247
LAbRAuORlTE-TITANAuGlTC '.ASAiT
13.55N 43.32E. HA-17. YEMEN
N.M. SHUKhl AND F.Z. DAbTA, 1955
SIU2
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
503
TOTAL
ORIGINAL
ANALYSIS
45.105.20
12.794.53
B.17.06
6.0110.90
2.78
.84
.13
3.200.00
.54
0.000.00
0.00o.oo
0.00100.25
WATER-CO2-FREE(100.0)
46.735.39
13.254.69
8.47
.06
6.2311.29
2.88
.87
.13
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
ATOMSWEIGHT
21.073.12
6.773.17
6.35
.05
3.637.79
2.06
.70
.06
.04
0.00.15
0.00
ATUMSNUMBERS (100.0)
17.441.51
5.831.32
2.65
.02
3.474.52
2.09
.41
.04
0CF)
OR
ASAN
NELC
ACNS
DI
MOHY
OLMT
ILTI
RUAP
ccM60/MG0?FE0
IN FtMICS =
WEIGHT NORM
(100.0)
.27
0.005.13
24.2820.51
0.000.00
0.000.00
24.58
0.006.72
0.006.78
0.0010.17
0.00
0.00
.29
1.27
.88
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
0.000.00
5.17
23.9320.69
.31
0.00
0.000.00
25.79
0.000.00
12.270.00
0.0010.26
0.00
0.00
.30
1.28
.60
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 56.87
M 26.91
A 16.21
F 46.66
C 40.04A 13.30
I24B
HYALObASALT FWB
15.30N 44.00E, KAULET EL ERG. SANA,
M.M. oHUKRI AND E,Z> RASTA, 1955
SIu2
TI02
AL203
FE2O3
FEOMNO
MGU
CAO
NA20
K20
P205
H2u*
H2CI-
C02S03
5CL
TOTAL
ORIGINAL
AUALYSIS
46.C81.00
17.384.P2
6.18
.16
7.2B
9.301.99
.58
.64
4.33
.77
0.000.00
.017.01s
0.00
0.00100.54s
WATER-C02-FREE(100.0)
48.301.05
18.225.05
6.48
.17
7.639.75
2.09
.61
.67
SITI
ALFE3
FE2MN
MGCA
NA
KP
Ht
H-
Cs
ATOMSWEIGHT
21.53
.60
9.203.37
4.80
.12
4.396.65
1.48
.48
.28
.05
.01
0.000.00
ATOMSNUMBERS (100.0
17.58
7
1
1
4
3
1
.29
.82
39
98
05
15
80
47
?8
21
0
Cf)
ORAB
ANNE
LC
ACNS
DIwo
HYOL
MTH?
ILTI
RUAP
CC
M("-iU/MG0?FEO
IN FtMCS =
HEIGHT NORM
(100.0)
1.540.00
3.6017.68
38.520.00
0.00
O.OO0.00
4.800.00
23.060.00
7.340.00
1.99
0.000.00
1.470.00
.80
NON-OXIDATION NOf>M
(FE203 CONVERTED TO FEO)
0.000.00
3.6417.86
38.900.00
0.00
0.000.00
4.990.00
20.4710.65
0.000.00
2.01
0.000.00
1.480.00
? 5B
3-COMPONENTWT.PERCENTS
FM
A
F
CA
52.7634.92
12.33
48.10
40.6611.24
1249
OLIVINE BASALT (RECENT)
15.3OM 44.05E? J. EL-l)AMAA-HA'iCiAN. YEMEN
N.M. SHUKRI AMD E.Z. BASTA, 1955
SIO2
TIU2
AL2O3
FE2O3
FEOMNU
MGOCAO
NA2O
K2O
P2O5
H2O*
H2U-
CO2SO3
TOTAL
ORIGINAL
ANALYSIS
46.12
1.19
16.92
2.14
8.33
.19
9.30
11.41
2.40
.31
.16
.97
.?6
.25
0.00
0.00
0.00
0.00
0.00
99.95
\,,ATEK-C02-FREE
46.84
1.21
17.18
2.17
8.46
.19
9.44
11.59
2.44
.31
.16
(100.0)
51TI
ALFE3
Ft2MN
M6CA
NAtc
PH*
H-c
s
0
ATOMS
WEIGHT
21.55
.71
8.95
1.50
6.47
.15
5.61
6.15
1.78
.26
.07
.01
.00
.07
0.00
44.66
ATOMS
NUMBERS (100.0)
17.10
.33
7.40
.60
2.59
.06
5.15
4.54
1.73
.15
.05
60.31
0
CBOK
ABAN
NE
LC
AC
NS
01
WO
HY
OL
MT
HM
ILTI
RU
AP
CC
IN FEMCS =
*ElGHT MCkM
(100.0)
0.00
0.00
1.66
20.48
34.90
.07
0.00
0.00
0.00
lfc.21
0.00
0.00
20.12
3.15
0.00
2.29
0.00
0.00
? 35
.58
.72
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
1.87
18.05
35.04
1.43
0.00
0.00
0.00
16.45
0.00
0.00
23.93
0.00
0.00
2.30
0.00
0.00
.36
.58
.64
NlGGLl
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
97
21.
47.
25.
5.
1.'
-24
3-COMPONENT
WT.PERCENTS
F 46.57
M 41.37
A 12.06
F 42.5ft
C 46.40
A 11.07
N 17.00
K 2.20
C 80.81
No. 1249
MINERALOGY: Phenocrysts: Olivine (slightly idding-
sitised). Groundmass: Labradorite laths, titanaugite,
magnetite; no glass.
OTHER INFORMATION: Mode: 44. 2% labradorite, 26.4%
olivine, 23. 5% pyroxene, 5. 8% magnetite.
No. 1250
REMARKS: CO- trace; published summation is 100.913.
MINERALOGY: Groundmass: Predominant glass, with
labradorite, pyroxene, magnetite.
No. 1251
REMARKS: No separate determination of H2O-.
MINERALOGY: Phenocrysts: Large labradorite (forms
62% of whole rock). Groundmass: Andesine-labradorite,
magnetite, chlorite, calcite, vesicles with epidote.
1250
OLlVlNE BASALT (RECENT)
15.45N 44.00E, bETwEEN NA-IT AND AMRAN,
N.M. SHJKRI AND E.Z. BASTA, 1955
SI02
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2S03
S
CL
TOTAL
ANALYSIS
46.72
.90
19.00
12.25
.64
.19
5.36
9.90
2.98
.87
.13
1.39
.56
0.00
0.00
.055-
.018
0.00
0.00
100.963
WATER-C02-FREE
(100.0)
47.22
.91
19.20
12.38
.65
.19
5.42
10.01
3.01
.88
.13
SITI
ALFt3
FE2MM
MbCA
NAK
PH*
H-
CS
ATOMS
WEIGHT
21.83
.54
10.05
8.57
.50
.15
3.23
7.08
2.21
.72
.06
.02
.01
0.00
0.00
AT0M5
NUMBERS (100.0)
17.25
.25
8.27
3.41
.20
.06
2.96
3.92
2.14
.41
.04
QCR
ORAn
ANNE
LCAC
NS
DI
VvOHY
OLMT
HM
ILTI
RU
HO
ccMGO/MGOtFEO
IN FtKICi =
WEIGHT NORM
(100.0)
0.00
0.00
5.21
25.53
36.?4
0.00
0.00
0.00
0.00
9.91
0.00
a.05
.61
.08
12.35
1.73
0.00
0.00
.29
0.00
1.00
NON-OX IDAT ION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
5.33
22.12
37.12
2.18
0.00
0.00
0.00
10.90
0.00
0.00
20. 28
0.00
0.00
1.77
0.00
o.oo
.29
0.00
.49
SIAL
FMC
ALK
108
25.9
41.5
24.6
8.0
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
58.33
24.25
17.4?
46.39
37.1ft
14.45
1251
P0RPHYRIT1C TRACHYLJASALT
13.35N 44.00E. TA-I7. YErttK
N.M. SHUKRI AND E.2. BASTA, 1955
5102
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K2D
P205
H20 +
H20-
C02
S03
TOTAL
OKICINAL
ANALYSIS
48.72
2.60
19.49
7.22
3.59
0.00
1.20
7.46
4.B5
2.64
.25
l.f.9
0.00
.42
0.00
0.00
0.00
0.00
0.00
100.13
ATER-C02-FKEE
(100.0)
9.70
2.65
9.88
7.37
3.66
0.00
1.22
7.61
4.95
2.69
.26
SITI
ALFE.3
Ft2MN
M6
CANA
K
PH*
H-C
s
ATOMS
WEIGHT
22.76
1.56
10.31
5.05
2.79
0.00
.72
5.33
3.60
2.19
.11.02
0.00
.11o.oo
ATOMS
NUMRERS (100.0)
18.13
.73
8.55
2.03
1.12
0.00
.67
2.98
3.50
1.25
.08
0CB
ORAR
ANNE
LCAC
NS
DIMO
HYOL
MTHM
ILTI
RU
APCC
MGO/MGO+FEO?
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
15.68
33.50
23.93
4.48
0.00
0.00
0.00
6.57
.47
0.00
0.00
4.13
4.50
5.01
0.00
0.00
.56
.97
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
16.11
27.02
24.26
8.32
0.00
0.00
0.00
8.39
0.00
0.00
9.27
0.00
0.00
5.08
0.00
0.00
.56
.99
.23
c
ALK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 55.44
41.96
28.96
29. Oft
32.4417.66
49.90
1252
P0RPHVRIT1C TRACrHYbASALT <AMYGDALOIDAL)
13.35N 44.00E, TA-IZ. YEMEN
N.M. 3HUKKI AND L.2. PASTA, 1955
SIU2
TIO2
AL2O3
FE2O3
FEDMMO
MGQ
CAO
NA2O
K2U
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
49.44
2.48
17.10
7.40
3.41
? 15
3.24
7.69
3.22
2.31
.65
2.35
.52
0.00
0.00
0.00
0.00
0.00
0.00
99.96
*ATER-C02-FkEE
50.92
2.55
17.61
7.62
3.51
.15
3.34
7.92
3.32
2.38
.67
(100.0)
SITI
ALF?3
FE2MN
MCj
CANA
K
PH.
H-C
s
0
ATOMS
WEI&HT
23.10
1.49
9.05
5.18
2.65
.12
1.95
5.50
2.39
1.92
.2a
.03
.01
0.00
0.00
46.31
ATOhS
NUMBERS (100.0)
18.57
.70
7.57
2.10
1.07
.05
1.82
3.10
2.35
1.11
.21
61.37
0
C8OH
ADAN
NE
LC
AC
N5
DI
HO
HY
DL
*1T
ILTI
3:j
UP
:c
fttl&HT NORM
(1OO.O)
4.13
0.00
14.09
2b.12
26.10
0.00
0.00
0.00
0.00
7.27
0.00
4.06
0.00
4.45
4.57
4.H5
0.00
0.00
1.4e
0,00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
14.30
28.54
26.46
0.00
0.00
0.00
0.00
7.98
0.00
9.76
6.54
0.00
0.00
4.92
0.00
0.00
1.49
0.00
NIGGLI
SIAL
FMC
ALK
KMG
TIP
C/FM
OZ
136
27.7
36.9
22.7
12.7
.3
.3
5.1
.7
.6
-15
In FfcKICS = 1.00
3-COMPONENT
WT.PERCENTS
F 55.21
M 16.55
A 28.24
F 44.99
C 32.00
A 23.01
N 24.36
K 17.47
C 58.17
No. 1252
MINERALOGY: Phenocrysts: Large labradorite, rare
green hornblende. Groundmass: Andesine-labradorite,
magnetite; amygdales with chlorite, epidote, calcite,
orthoclase, quartz.
No. 1253
REMARKS: CO2 trace.
MINERALOGY: Aphyric texture. Groundmass:
Andesine-oligoclase laths, olivine Fa42, scarce diopside-
augite, magnetite, orthoclase(?) microlites.
OTHER INFORMATION: Mode: ca. 50% plagioclase,
ca. 20% olivine.
No. 1254
REMARKS: No separate determination of H2O-; this
rock would have been termed "grorudite" by some
Ethiopian authors.
MINERALOGY: Phenocrysts: Anorthoclase, scarce
albite. Groundmass: Trachytic texture; anorthoclase,
quartz, magnetite and haematite (after riebeckite).
OTHER INFORMATION: Mode: 64. 5% anorthoclase and
albite, 8. 5% quartz, 27% iron oxides.
1253
OLlVlNE TRACMYEASALT MUCFARITIC)
15.30N 44.05E, HAfDAN, YE>-tN
N.M. SHUKRI AND E.Z. BASTA. 1955
SIO2TIO2
AL2O3FE2O3
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5H2O+
H2O-
CO2
S03
S
CL
TOTAL
JINALANALYSIS
54.52
.i
16.-
b.t
5.
1.'
5.C
4.<
2.
."
1 ?<
.<
10
4
7
>4
4
.5
)0
3
2
na
>4
0.000.00
.0280.007
0.000.00
100.46?
*ATER-C02-FKEE(100.0)
55.59
.92
17.075.98
5.75
.24
1.485.10
4.722.37
.79
SITI
AL
FE3
FE2
MN
MG
CA
NA
K
P
H+
H-
Cs
ATOMSWEIGHT
25.47
.54
8.864.11
4.38
.19
.87
3.57
3.431.93
.34
.02
.01
0.000.00
ATOMS
NUMBERS (100.0)20.10
.25
7.271.63
1.74
.08
.80
1.98
3.311.09
.24
0
enOR
AH
AM
NELC
AC
NS
DI
woHY
OL
MT
IITI
RU
AP
ccMG0/MGG*FEO
IN FEMCS =
WEIGHT NORM(100.0)
6.210.00
14.0140.03
18.340.00
0.00
0.00
0.001.99
0.007.?6
0.008.70
0.001.74
0.000.00
1.72U.00
.51
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
0.000.00
14.1740.49
18.550.00
0.00
0.00
0.002.10
0.0020.82
.36
0.000.00
1.760.00
0.00
1.740.00
.21
SIAL
FM
C
ALK
166
30
35
16
18
3-COMPONENT
WT.PERCENTS
F 57.81
49.06
21.31
29.62
38.7419.41
41.84
1254QUARTZ SODA-TRACHYTE DGKORUD ITE"
14.33N 44.02E, N. OF j. SAbER.N.M. SHUKkl AND E.Z. RASTA, 1955TA-IZ, YEMEN
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P205
H2U*
H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
63.10
.19
17.22
4.10
.27
.08
.BO
1.18
5.39
3.10
? 30
3.36
0.00
.97
0.00
0.00
0.00
0.00
0.00
100.06
WATKR-C02-Ft<EE
(100.0)
65.91
.20
17.99
4.28
.28
.08
.84
1.23
5.63
3.24
.31
SITI
AL
FE3
FL2
MN
MG
CA
NA
KP
Hf
H-C
s
ATOMS
WEIGHT
29.48
.11
9.11
2.87
.21
.06
.48
.84
4.00
2.57
.13
.04
0.00
.26
0.00
ATOMS
NUMBERS (100.0)
22.83
.05
7.34
1.12
.08
? 02
.43
.46
3.78
1.43
.09
C02 EXCLS5 .32
Q
CB
OR
AH
AN
NE
LC
AC
NSDI
WO
HY
OL
MT
HI
ILTI
RU
AP
CC
WLIGHT NORM
(100.0)19.16
5.1419.00
47.28
0.000.00
0.00
0.00
0.000.00
0.002.07
0.00
.60
3.e3
.37
0.000.00
,hn
1.53
.32NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)16.26
5.1919.15
47.67
0.000.00
0.00
0.00
0.000.00
0.008.80
0.000.00
0.00
.38
0.000.00
.68
1.54
3-COMPONENTWT.PERCENTS
F 31.99M 5.86
A 62.15
F 31.13C 8.40
A 60.4/
N 55.74K 32.06
C 12.20
MGO/MG0*H:.OIN FtMICS -
1255
PIEBECKITE TRACHYTE (SAlE Ar. 1256)
13.3SN 43.5t>E, GAeANET-EL-L06ElNAT. W. OF TA-IZ, YEMEN
N.M. SHUKRI AND E.I. BASTA, 195t> (ANALYSED IN LONDON)
SI02
TIO2
AL2O3
FE2O3
FEOMNO
MGO
CAU
NA2O
K2O
P2U5
H2O +
H2O-
C02SO3
TOTAL
Q
enOR
ABAN
NELC
ACNS
DI
WOHY
OLMT
HMIL
TIRU
AP
CCM60/M60+FEO
IN FEMICS =
ORIGINALANALYSIS
69.74
.25
14.162.86
.29
.05
.28
.614.68
5.29
.05
1.07
.29
.17
0.000.00
0.000.00
0.0099.79
WEIGHT NORM
(100.0)
21.30
.10
31.85
40.341.69
0.000.00
0.000.00
0.00
0.00? 71
0.00
.38
2.65
.48
0.000.00
.11
.39
1.00
KATEK-C02-FKEE(100.0)
70.97
.25
14.412.91
.30
.05
.28
.62
4.765.36
.05
NON-OXIOATION NORM
(FE2O3 CONVERTED TO FEO)
19.33
.10
32.03
40.561.70
0.000.00
0.000.00
0.00
0.005.29
0.000.00
0.00
.48
0.000.00
.11
.40
.17
SITI
ALFt3
Ft2MN
MG
CANA
KP
Ht
H-C
S
0
ATOMS
WEIGHT
32.58
.15
7.492.00
.23
.04
.17
.44
3.474.39
.02
.01
.00
.05
0.00
48.75
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
uz
ATOMSNUMBERS (100.0)
24.58
.07
5.R8
.76
.09
.01
.15
.23
3.202.38
.01
62.64
352
42.2
14
3
40
5
3
1
43
15
9
1123
92
3-COMPONENT
WT.PERCENTS
F 23.51
M 2.09
A 74.40
F ?2.94
C 4.44
A 72.61
N 44.23
K 50.00
No. 1255
REMARKS: Same rock as 1266.
MINERALOGY: Phenocrysts: Euhedral Na-sanidine, less
common and larger anorthoclase. Groundmass: Trachytic
texture; sanidine, riebeckite, aegirine, iron-oxides.
OTHER INFORMATION: Mode: 77. 5% sanidine, 10%
anorthoclase, 9. 5% riebeckite, 3% magnetite and
haematite.
No. 1256
REMARKS: Same rock as 1255; no separate determina-
tion of H_O-.
MINERALOGY: See under 1255.
No. 1257
REMARKS: Same rock as 1258.
MINERALOGY: Phenocrysts: Anorthoclase, scarce An8,
scarce dark-brown biotite. Groundmass: Trachytic
texture; anorthoclase, rare aegirine-augite,
katophorite, magnetite-haematite, quartz.
OTHER INFORMATION: Mode: 74. 2% anorthoclase,
4% quartz, 5. 1% albite, 15. 5% iron-oxides (altered
femics), 1.2% biotite and chlorite.
1Z56
RIEBECKITL TKACHYTE (SA11E AS 1255)
13.38N 43.55E, GABANET-EL-LOGEINAT, M. OF TA-IZ. YEMEN
N.M. SHUKRI AND ?.2. 6ASTA, 1955 (ANALYSED IN CAIRO)
SIU2
TI02
AL2O3
FE2O3
FEU
MNU
MGO
CAO
NA2O
K2O
P2O5
H2G*
HZO-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
68.18
.50
11.64
5.60
.36
.08
.72
1.12
4.19
4.72
.28
1.70
0.00
.90
0.00
0.00
0.00
0.00
0.00
99.99
fcATER-COz-FREE
(100.0)
70.01
.51
11.95
5.75
.37
.08
.74
1.15
4.30
4.85
.29
SI
TI
AL
FE3
Ft2
MN
MG
CA
NA
K
P
H-f
H-
C
S
ATOMS
WEIGHT
31.85
.30
6.16
3.92
.28
.06
.43
.80
3.11
3.92
.12
.02
0.00
.25
0.00
ATOMS
NUMBERS (100.0)
24.52
4
1
2
2
14
93
52
11
02
39
43
92
17
09
NORM C02 EXCESS
0
CB
OR
AS
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
WEIGHT MOF'M
(100.0)
25.40
0.00
28.46
34.13
0.00o.oo
0.00
1.79
0.00
0.00
0.00
1.R3
0.00
0.00
5.09
cc
MGu/MGO + FF.0
IU FEI-K.S =
.28
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
22.48
0.00
28.77
34.51
0.00
0.00
0.00
0.00
.48
0.00
0.00
10.42
0.00
0.00
0.00
.98
0.00
0.00
? 63
1.45
.22
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 38.23
M 4.62
A 57.15
F 37.27
C 7.00
A 55.7?
N 41.77
K 47.06
C 11.17
1257
ANORTi-iOCLASt-jlOTITE TKAcyTE
13.35N 44.00E. TA-I7, YEMEN
N.M. SHUKKI AND F.Z. RASTA, 1955
(SA,.iE AS 1258)
(ANALYSED IN LONDON)
SI02
TIOZ
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K20
P205
H2O*
H2O-
CO2
SOi
TOTAL
ANALYSIS
69.94
.60
14.43
2.30
? 57
.08
.77
.40
5.33
5.01
.10
.56
.18
0.00
0.00
0.00
0.00
0.00
0.00
99.77
?ATER-C02-FREE
(100.0)
70.63
.61
14.57
2.32
.58
.08
.27
.40
5.38
5.06
.10
SI
TI
AL
FE3
FE2
MN
Mti
CA
NA
K
P
H*
H-
C
S
ATOMS
WEIGHT
32.68
.36
7.63
1.61
.44
.06
.16
.29
3.95
4.16
.04
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0
24.42
5
3
2
16
94
61
.17
.02
14
15
61
23
03
0
CR
OR
AH
AN
NE
LC
AC
NS
DI
MO
HY
OL
MT
HI
IL
TI
RU
AP
CC
MGO/MG0*FEO
IN FEMC5 =
*EIGHT NORM
(100.0)
18.94
0.00
29.98
45.66
? 58
0.00
0.00
0.00
0.00
.65
0.00
.38
0.00
.37
2.07
1.15
0.00
0.00
.22
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
17.34
0.00
30.12
45.86
.58
0.00
0.00
0.00
0.00
.73
0.00
3.99
0.00
0.00
0.00
1.16
0.00
0.00
.22
0.00
.20
NlGGLl
C
ALK
C/FM
QZ
3-COKPONENT
WT.PERCENTS
F 21.29
M Z.OO
A 76.71
F ?1.09
C 2.94
A 75.97
N 49.63
K 46.65
C 3.72
1258
ANORTHOCLASL-JIUTUE TRACHYTE (SANE AS 1257)
13.35i^ 44.00E, TA-I/, YtMLf.
N.M. SHUKKl Ai-iC; t.Z. P.AS1A, ls">5 <AUALYSEO IN CA1KO)
SIO2
7102
AL203
FE2O3
FF.J
MHO
MOO
CAO
NA20
K20
P2U5
H20 +
H20-
C02
OKItli-iAL
ANALYSIS
69.06
.60
IS. 01
I.f5
1.37
.05
? U
.74
^.34
<t.79
0.00
.06
0.00
1.01
o.nou.oo
0.00
0.00
0.00
hATER-C02-FREE
(100.0)
SITl
AL
Ft3
Ft2
ATOMS
WEIGHT
3Z.26
.36
7.9<.
1.15
1.06
ATOMS
NUMBERS (100.0)
NORM C02 EXCESS
In FEMCi =
.43
(1OO.O)
1'). 21
1.01
2b.45
45.41
0.00
O.CO
O.PO
0.00
0.00
0.00
0.00
? ftl
0.00
2.40
0.00
1.14
U.OO
o.co
0.00
1.33
.43NON-OXIDATION NORM
(fE2O3 CONVERTED TO FEO)
17.51
1.02
28.55
45.55
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.46
0.00
0.00
0.00
1.15
0.00
0.00
0.00
1.33
336
43.1
0.00
.30
3-COMPONENT
WT.PERCENTS
F 22.72
M l.OS
A 76.22
F ?1.74
49.13
44.07
6.SI
No. 1258
REMARKS: Same rock as 1257; no separate determina-
tion of H-O-.
MINERALOGY: See under 1257.
No. 1259
REMARKS: No separate determination of H O-.
MINERALOGY: Phenocrysts: Na-sanidine. Groundmass:
Quartz-feldspar microspherulites, riebeckite.
OTHER INFORMATION: Mode: 36. 5% quartz, 50. 5%
Na-sanidine, 13% riebeckite. Aegirine-katophorite
pantellerites occur at Hais, Wessil, Hadjellah, Manaka.
No. 126 0
REMARKS: Same rock as 1261; no separate determination
of H2O-.
MINERALOGY: See under 1261.
1259
COt-iEN^ITF.
13.3511 44.00E, 1A-I7, yFM.N
N.rt. SHUKIU AND t.<:. t'AbIA, 19
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGU
CAu
NA2O
K2O
P?O5
H2O*
H2U-
C02
503
TOIAL
UHIc INAl
ANALYSIS
73.42
0.00
10.49
1.72
.97
.05
o.on2.22
4.56
4.20
.27
1.88
0.00
.70
0.00
0.00
0.00
0.00
0.00
100.48
?.ATER-C02-FREE
(100.0)
74.99
0.00
10.72
1.76
0.00
2.27
4.66
SI
TI
AL
Ft3
Ft2
Mil
MCj
CA
NA
K
ATOMS
HEIGHT
34.30
0.00
5.55
1.20
? 75
.04
0.00
1.59
3.3S
3.49
ATOMS
NUMREHS (100.0)
25.92
0.00
4.37
.46
.29
.01
0.00
.84
3.12
1.R9
??IGHT NOW
(100.0)
31.89
0.00
25.24
30.97
0.00
O.CO
0.00
5.06
? 59
3.59
.44
0.00
0.00
0.00
0.00
0.00
0.00
U.00
NON-OX I OAT I ON NORM(I-E2G3 CONVERTED TO FEO)
32,79
0.00
25.33
31.07
0.00
0.00
0.00
0.00
1.93
4.55
0.00
2.10
0.00
0.00
0,00
0,00
0,00
0,00
SI
AL
FM
c
ALK
K
M6
TI
P
C/f-M
oz
411
34.7
12.1
13.4
39.9
.38
0.00
0.0
.64
1.11
167
3-COMPONENT
WT.PERCENTS
F 73.49
M 0.00
A 76.51
F 19.68
C 16.?4
A 64.OH
N 41.53
K 38.25
C 20,22
MGu/MGO+HFO
IN FEMCS =
1260
SpHERULlTlC HMVULITE (5As,E AS
13.35N 44.00E, lA-I.^, YLhLN
N.M. SHUKfil AND F.Z. LAiTA, 19 b (ANALYSEL) IN CAIRO)
SIU2
TI02
AL2O3
FE2O3
FEO
MNG
Mf,0
CAu
NA20
<20
P2U5
H2U*
H20-
C02
S03
AflALYSI
76
0
11
1
0
0
3
4
? RH
.00
.02
.HO
.36
.00
.00
.74
.38
.77
0.00
.?3
0.00
0.00
0.00
0.00
0.00
99.96
?,ATER-COi-FREE
77
0
11
1
0
0
.59
.00
.12
.82
.36
.00
.00
(100.0)
SI
TI
AL
Ft3
FL2
MN
Mb
CA
NA
K
ATOMS
(.EIGHT
35.92
0.00
5.83
1.26
.28
0.00
0.00
.53
2.51
3.96
ATOMS
NUI'lfeEHS (100.0)
26.66
0.00
4.50
.47
.10
0.00
0.00
.78
2.27
2.11
0
C'l
OR
AP
AN
NF
LC
AC
NS
01
WO
HY
OL
IT
H--1
IL
TI
RU
A"
cc
MGO/MCJO?H"0
IN FEUICS =
ntlGHT f?04M
(100.0)
3M.61
0.00
2K.47
23.C8
.75
0.00
0.00
0.00
0.00
0.00
.27
0.00
0.00
1.17
1.01
0.00
0.00
0.00
.31
? 53
0.00
NON-OXIDATION NORM
(TE2O3 CONVERTED TO FEO)
37.21
0.00
28.57
28.98
,75
0.00
0.00
0.00
0.00
.59
0.00
3.07
0.00
0.00
0.00
0.00
0.00
0.00
.31
.53
0.00
.4R
0.00
0.0
3-COMPONENT
WT.PERCENTS
F 20.9b
38.0?
53.66
SPHE&ULITIC RHYOLHE (5A E AS 12-,0)
13.35H 44.00E, TA-I:, YEMLiN
N.rt. iHUKkl A.^U F.Z. TAS1A, 1955 (ANALYSED IN LONDON)
SI02
TI02
AL2O3
FE2O3
FFO
MNU
MGO
CAO
NA2O
<2O
P2O5
H20*
H2O-
CO2
SO3
TOTAL
0
CB
OR
AR
AN
NE
LC
AC
NS
DI
wn
HY
OL
MT
HM
IL
TI
RU
AP
CC
Okld-ML
ANALYSIS
77.01
.15
11.30
l.f>3
.25
.02
.04
.15
3.40
5.47
.02
? 39
.07
.01
0.00
0.00
0.00
o.oo0.00
99.91
WtlGHT WPM
(100.0)
36.44
0.00
32.60
27.77
0.00
0.00
o.oo1.09
0.00
.22
.12
0.00
0.00
.44
.96
.29
0.00
0.00
.04
.02
nATER-C02-FREE
(100.0)
77.44
.15
11.36
1.64
.25
.02
.04
.15
3.42
5.50
.02
NON-OXIDATION NORM
(FE2O3 CONVFKTED TO FEO)
35.75
0.00
32.70
27.86
0.00
0.00
0.00
0.00
.29
.51
0.00
2.54
0.00
0.00
0.00
.29
0.00
0.00
.04
.02
SI
TI
AL
Ft3
Ft2
MN
Mb
CA
NA
K
P
H*
H-
C
S
0
ATOMS
HEIGHT
35.98
.09
5.98
1.14
.19
.02
.02
.11
2.52
4.54
.01
.00
.00
.00
0.00
49.30
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
P
CFM
OZ
ATOMS
NUMBERS
26.62
4
2
2
04
60
42
07
01
02
06
28
41
01
63.46
508
44.0
10.0
1.1
44.9
.51
.04
.7
.06
.11
231
(100.0)
3-COMPONENT
WT.PERCENTS
F
w
A
F
C
A
N
<
C
D.I.
17.4?
.37
82.21
17.25
1.3R
H1.3R
37.69
60.64
1.66
97.9?
No. 1261
REMARKS: Published summation is 99. 90; same rock
as 1260.
MINERALOGY: Phenocrysts: Corroded quartz, Na-
sanidine. Groundmass: Up to 80% spherulitic quartz-
feldspar intergrowth, also micrographic texture with
myrmekite, some haematite and magnetite, no femics.
OTHER INFORMATION: Mode: 35.9% quartz, 61.7%
Na-sanidine, 2. 3% iron-oxides. Also, a comendite
from El-Barh (between Ta'iz and Mokha) contains
77.24% SiO2, 4. 14% Na2O, 3.77% I^O, and is composed
of quartz and Na-Sanidine phenocrysts, in a fluidal,
microspherulitic ground mass with aegirine.
No. 1262
MINERALOGY: Phenocrysts: Oligoclase-andesine,
orthoclase, small, sometimes euhedral olivine ca.
Fa70, pale-green diopside (euhedral). Groundmass:
An30 microlites (trachytic texture), magnetite,
orthoclase, pyroxene, olivine, apatite, rare glass.
OTHER INFORMATION: Mode: 56. 7% oligoclase-andesine,
10. 0% orthoclase, 7.2% olivine, 5. 3% diopside-augite,
19- 6% magnetite and haematite, 1. 2% apatite.
No. 1263
REMARKS: MnO absent; no separate determination of
H2?-
MINERALOGY: Phenocrysts: Anorthoclase/Na-sanidine,
aegirine-augite, rare albite. Groundmass: Pale-grey
perlitic glass, aegirine-augite microlites.
OTHER INFORMATION: Mode: 31.5% Na-sanidine,
3.3% aegirine-augite, 63.2% glass.
TI<ACHYANDESITE
? JEBEL MADID, ADEIX
SHUKCI AND F.2. RAS1A, 1959
5102
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P205
H20*
H20-
C02
503
TOTAl
ORIGINAL
AUALY5IS
61.44
1.00
14.63
7.63
.73
.15
.54
3.90
5.52
3.26
.19
.80
? 12o.oo
0.00
0.00
0.00
0.00
0.00
99.91
wATER-cO2-F?EE
(100.0)
62.07
1.01
14.78
7.71
.74
.15
.55
3.94
5.58
3.29
.19
SITI
ALF?3
FE2MN
M&CA
NAK
P
H+
H-C
S
ATOMS
WEIGHT
28.70
.60
7.74
5.34
.57
.12
.33
2.79
4.10
2.71
.08
.01
.00
0.00
0.00
ATOMS
NU4RERS (100.0)
22.05
6
2
1
3
1
27
19
06
22
05
29
50
84
49
06
Q
CBOR
AFl
AMNE
LC
ACNS
DI
WO
HYOL
MT
H"
ILTI
PU
A?
CC
MGO/MGO*FE10
IN FLiilCS =
WLlCHT KOkM
(100.0)
10.8R
o.oo19.51
47.29
5.50
0.00
0.00
0.00
0.00
2.94
3.81
0.00
0.00
0.00
7.73
1.89
.03
0.00
.42
0,00
1.00
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEO)
5.74
0.00
19.80
48.00
5.58
0.00
0.00
0.00
0.00
11.53
0.00
6.98
0.00
0.00
0.00
1.95
0.00
0.00
.43
0.00
.14
SIAL
FMC
ALK
223
31.3
26.5
15.2
27.0
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 47.29
M 3.05
A 49.66
F 39.73
C 18.54
A 41.73
N 43.53K 25.71
C 30.76
1263
HYALO PANTELLLklTL
, jEfEL i.ADID, ADtN
H.M. SHUKkl Mil/ E.Z. RASTA, 1959
SIU2
TIU2
AL2O3
FE2O3
FEO
MNO
MCU
CAO
NA20
K20
P2O5
H20+
H20-
C02
S03
TOTAL
URIClNAl
ANALYSIS
64.44
.20
12.86
3.26
2.83
0.00
.31
2.71
3.86
4.77
0.00
4.44
0.00
.48
0.00
0.00
0.00
0.00
0.00
100.16
?ATER-C02-FREE
67.66
.21
13.50
3.42
2.97
0.00
.33
2.85
4.05
5.01
0.00
(100.0)
SITI
ALFE3
Fh2MN
MbCA
NAK
PH*
H-c
s
ATOMS
WEIGHT
30.11
.12
6.80
2.28
2.20
0.00
.19
1.94
2.86
3.96
0.00
.05
0.00
.13
0.00
ATOMS
NUMBERS (100.0)
23.88
.06
5.62
.91
.88
0.00
.17
1.08
2.77
2.26
0.00
0
CB
ORAn
AM
NELC
ACNS
DIWO
HYOL
MTHM
ILTI
RU
AcCC
IN FEMCS '=
WEIGHT NORC.
(1OO.O)
19.94
COO
29.53
34.21
3.77
0.00
0.00
0.00
0.00
6.03
.04
0.00
0.00
4.95
0.00
.40
0.00
0.00
0.00
1.14
.32
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
16.45
0.00
29.72
34.43
3.80
0.00
0.00
0.00
0.00
6.33
0.00
7.73
0.00
0.00
0.00
.40
0.00
0.00
0.00
1.15
.09
3-COMPONENT
WT.PERCENTS
FM
A
F
C
A
N
Kc
40.5?
2.06
57.42
34.94
15.55
49.51
34.04
42.06
23.90
1264
OLIVINE BASALT
14.50M 4O.19E, MT. AH.AttO. ERITREA
R. FILJAIW- N. GLUMICIC. 7. 7A&ORAC, 1959
SIU2
T1O2
AL2O3
FE2O3
FFO
HNO
MGO
CAO
NA2O
K2O
P2O5
H2O+
H2O-
CO2
S03
ORIGINAL
ANALYSIS
47.64
1.35
18.06
1.66
6.00
.19
8.10
12.02
2.40
.76
0.00
1.81
.34
0.00
0.00
0.00
0.00
0.00
kATER-C02-FREE
(100.0)
48.52
1.38
18.39
1.69
6.11
.19
8.25
12.24
2.44
.77
0.00
SITI
ALFE3
Ft2
Mil
Mb
CANA
KP
H?
H-C
S
0
ATOMS
WEIGHT
22.26
.81
9.56
1.16
4.66
.15
4.89
8.59
1.78
.63
0.00
.02
.00
0.00
0.00
45.82
ATUMS
NUMBERS (100.0)
17.56
7
1
4
4
1
0
37
85
46
85
06
46
7572
3600
60.56
Q
CB
ORAB
ANNE
LCAC
NS
DIWO
HYOL
MT
H*lIL
TIRU
APcc
MGO/MGO+KEO
IN FtMCS =
wLlGHT NORM
( LOO.O)
0.00
0.00
4.58
19.79
36.90
.SO
0.00
0.00
0.00
19.27
0.00
0.00
13.88
2.46
0.00
2.61
0.00
0.00
0.00
0.00
.77
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.60
17.90
37.02
1.56
0.00
0.00
0.00
19.55
0.00
0.00
16.75
0.00
0.00
2.62
0.00
0.00
0.00
0.00
.70
NIGGL1
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
106
23.7
41.3
28.7
6.3
.17
.65
2.3
0.00
.70
-19
3-COMPONENT
WT.PERCENTS
F 40.49
M 42.81
A 16.70
F 33.54
C 52.63A 13.84
N 15.81
K 5.01
C 79.18
No. 1264
MINERALOGY: Incomplete description. Phenocrysts:
Olivine. Groundmass: An70, scarce magnetite, some
calcite.
OTHER INFORMATION: Occurs intercalated in the
Lower Dogali Beds.
No. 1265
MINERALOGY: Incomplete description. Groundmass:
An70, abundant magnetite.
OTHER INFORMATION: Occurs intercalated in the
Lower Dogali Beds. Manasse (1908) notes the occur-
rence of a porphyritic uralite basic rock from Desset
(where Neogene sediments outcrop).
No. 1266
REMARKS: Published summation is 100.08.
MINERALOGY: Phenocrysts: Abundant An23, somewhat
altered and with inclusions of apatite, augite. Ground-
mass: Plagioclase, green pleochroic augite rimmed and
fissured with chlorite and magnetite, strongly corroded
hornblende.
1265
PASALT
14.50N 40.19E, MT. AFNA 0, ERITREA
R.FILJAK, N. &LUMICIC, Z.ZAiiORAC, 1959
SI 02
T102
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
ORI&INAL
ANALYSIS
48.13
2.00
17.05
6.40
6.65
.14
5.33
9.21
2.81
? 66
0.00
1.03
1.02
0.00
0.00
0.00
0.00
0.00
0.00
100.43
^ATER-C02-FREE
(100.0)
48.92
2.03
17.33
6.51
6.76
.14
5.42
9.36
2.86
.67
0.00
SITI
ALFE3
FE2MN
M&CA
NAK
PH*
H-C
S
ATOMS
WEIGHT
22.49
1.20
9.02
4.48
5.17
.11
3.22
6.58
2.08
.55
0.00
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
17.97
.56
7.50
1.80
2.08
.04
2.97
3.69
2.04
.31
0.00
0
CBOR
ABAN
NELC
ACNS
DIWO
HY
OLMT
HM1L
TIRU
APCC
MGO/MG0*FE0
IN FEMKS =
wElGHT NORM
(100.0)
2.68
0.00
3.97
24.22
32.45
0.00
0.00
0.00
0.00
11.26
0.00
12.11
0.00
9.45
0.00
3.P6
0.00
0.00
0.00
0.00
? 82
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
4.02
24.52
32.86
0.00
0.00
0.00
0,00
11.94
0.00
10.52
12.23
0.00
0.00
3.91
0.00
0.00
0.00
0.00
.48
3-COMPONENT
WT.PERCENTS
F 59.71
M 24.39
A 15.88
F 50.72
C 35.79
A 13.49
N 22. 1A
K 5.21
C 72.63
1266
ANDES ITE
14.30N 40.50E, ADAYLO, fcPlTREA
R. FILJAK, N. GLUMCIC, 7. ZA&ORAC,
SI02
TI02
AL203
FE2O3
FEOMNU
MGOCAO
NA20K20
P2O5
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
5b.49
.68
IB.55
6.09
l.f-7
.25
1.65
4.32
6.33
2.12
o.no1.79
.17
0.00
0.00
o.oo0.00
0.00
0.00
100.11
WATER-C02-FREE
(100.0)
57.55
.69
18.90
6.20
1.70
.25
1.68
4.40
6.45
2.16
0.00
SITI
ALFt3
Ft2MN
M6CA
NAK
PH*
H-
Cs
ATOMS
WEIGHT
26.39
.41
9.81
4.26
1.30
.19
1.00
3.09
4.70
1.76
0.00
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
20.38
7
1
I
4
0
18
89
66
50
08
89
67
43
98
00
0
OR
A3AN
NELC
ACNS
DIWO
HY
OL?T
HI
1LTI
Rl)AP
CC
MGO/MGCtFEU
IN FIMICS ='
fct T NORM
(10O.O)
.88
0.00
12.80
b'
H
.69
.17
.00
.00
.00
.00
.45
),00
.13
.00
.32
.24
.32
0.00
0.00
0.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.95
52.81
16.37
1.37
0.00
0.00
0.00
4.95
0.00
0.00
10.22
0.00
0.00
1.33
0.00
0.00
0.00
0.00
.32
SIAL
FMC
ALK
178
34
27
14
23
3-COMPONENT
WT.PERCENTS
F 43.45
M 9.24
A 47.31
F 37.80
C 71.04
A 41.16
N 49.57
K 16.60
C 33.83
1267
P0RPHYR1TIC COI-.ENOlTt
14.5011 40.19E, i*T. AfNd.,0, ERITREA
R. FILJAK, N. GLJMCIC, 7. 2AGCRAC, 1959
sru2
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2G
P2O5
H2O+
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
75.51
0.00
11.62
2.39
.08
0.00
.08
.35
3.83
4.R0
0.00
.57
.63
0.00
0.00
0.00
0.00
0.00
o.oo99.H6
KATER-C02-FREE
(100.0)
76.54
0.00
11.78
2.42
.08
0.00
.08
.35
3.SB
4.87
0.00
SITI
ALFE3
FL2MM
Mi
CA
NA
PH*
H-C
s
0
ATOMS
??IGHT
35.28
0.00
6.15
1.67
.06
0.00
.05
.25
2.84
3.98
0.00
.01
.01
0.00
0.00
49.56
ATOMS
NUMRERS (100.0)
26.31
0.00
4.77
.63
.02
0.00
.04
.13
2.59
2.14
0.00
63.37
0
CHOR
AnAN
NELC
ACNS
DIMO
HYOL
MTHM
ILTI
Rl J
APCC
MGO/MGOtFtO
IN FEhlCS =
HEIGHT NORM
(100.01
34.62
o.oo28.R4
32.94
.27
0.00
0.00
0.00
0.00
.44
.39
0.00
0.00
.26
2.25
0.00
0.00
0.00
0.00
0.00
1.00
NON-OX I DAT I ON NORM
(FE2O3 CONVERTED TO FEOI
33.05
0.00
28.97
33.09
.28
0.00
0.00
0.00
0.00
1.32
0.00
3.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
o.oo
.07
NIGGLI
SIAL
FMC
ALKK.
MGTI
P
C/FM
OZ
471
42.8
12.<?
2.3
42.4
.45
.06
0.0
0.00
.19
202
3-C0MP0NENT
WT.PEHCENTS
FM
A
FC
A
NK
C
D.I.
22.09
77
21
3
75
42
53
3
72
19
57
.06
37
65
45
90
96.86
No. 1267
REMARKS: Published summation is 99.96; TiO2 and
MnO traces; potassic rock.
MINERALOGY: Phenocrysts: Corroded sanidine, un-
common euhedral quartz. Groundmass: Spherulitic,
devitrified cristobalite grains, tridymite aggregates,
intense-green pyroxene (non-pleochroic) ? aegirine-
augite(?).
No. 1268
REMARKS: Also for 1270, 1274, 1275, 1276, 1277.
MINERALOGY: General description for the above
numbered specimens. Phenocrysts: Zoned An50-40
(not always present). Groundmass: Microlites An40-28,
glass with small crystals olivine (Fa20-30, occasionally
Fa50), and later titanaugite, iron-oxides, no ortho-
pyroxene, no pigeonite.
OTHER INFORMATION: This is the most abundant rock-
type of the Erta-ali volcanic chain. The basalts have a
high TiO_ content and high Na/K. The norms are
frequency quartz-bearing.
No. 1269
MINERALOGY: Phenocrysts: Abundant small olivines
(Fal5-20), An70, titanaugite. Groundmass: An60-55,
titanaugite, olivine, scarce black glass with iron-oxides,
late-stage alkali feldspar.
1268
ANDES1NE BASALT
13.27* 40.32E.
H. TAZIEFF ?T AL.i
S.W. BASE ALI RAr,U, N. AFAR
SI02
TI02
AL2O3
FE2O3
FEOCNO
MGGCAO
NA20
K2U
P2O5
H2O*
H2O-
CO2
SO 3
TOTAL
ORI&IMAL
ANALYSIS
47.17
3.20
10.80
7.37
8.00
.19
6.45
10.64
2.95
.90
.36
? 87
.77
0.00
0.00
0.00
0.00
0.00
0.00
99.67
WATER-C02-FREE
(100.0)
48.12
3.26
11.02
7.52
8.16
.19
6.58
10.85
3.01
.92
.37
SITl
ALFE3
FE2MN
MGCA
NAK
P
H +
H-c
s
ATOMS
HEIGHT
22.04
1.92
5.71
5.15
6.22
.15
3.89
7.60
2.19
? 75
.16
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0
18.02
4
2
2
3
4
2
92
86
12
56
06
68
36
19
44
12
0
CBOR
AB
ANNE
LC
ACNS
DIWO
HY
OL
I?T
HM
ILTI
RU
AP
CCMGO/MGO+FtO
IN FtKItS =
WEIGHT NORM
(100.0)
1.2B
0.00
5.44
25.51
13.80
0.00
0.00
0.00
0.00
30.21
0.00
5.84
0.00
10.92
0.00
6.19
0.00
0.00
.PO
0.00
.85
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
5.52
23.63
14.01
1.22
0.00
0.00
0.00
32.17
0.00
0.00
16.36
0.00
0.00
6.28
0.00
0.00
.81
0.00
.50
c
ALK
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 59.88
M 25.13
A 15.00
F 51.47
C 35.63A 12.89
N 20.36
K 6.21
C 73.43
1269
ANKARAMITIC liASALT
13.57N 40.22E. oASE Of" SALT DOME.
H. TAZIEFF ET AL.. 1969
S. END L. ASSALE (?ARUM). N. AFAR
SIOZ
TIO2
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA2O
K2O
P2O5
H2G*
H2O-
C02SO3
TOTAL
ANALYSIS
47.93
1.77
11.31
4.31
7.87
.11
11.85
10.60
2.30
.41
.24
.21
1.00
0.00
0.00
0.00
0.00
0.00
0.00
99.91
WATER-C02-FREE
(100.0)
48.56
1.79
11.46
4.37
7.97
.11
12.01
10.74
2.33
.42
.24
Tl
AL
FE3
FE2
ATOMS
WEIGHT
22.39
1.06
5.98
3.01
6.12
.09
7.15
7.58
1.71
0.00
0.00
ATOMS
NUMBERS (100.0)
17.81
.50
4.95
1.21
2.45
.03
6.58
4.22
1.66
0
enOR
AB
ANNE
LC
ACNS
DIWO
HY
OLMT
HMIL
TIRU
APCC
MGU/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
2.46
19.75
19.55
0.00
0.00
0.00
0.00
25. P7
o.oo12.41
9.68
6.34
0.00
3.40
0.00
0.00
.53
0.00
.83
NON-OX I DAT ION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
2.4819.92
19.720.00
0.000.00
0.0026.62
0.00
4.51
22.79
0.00
0.00
3.43
0.00
0.00.54
0.00
.68
.21
.41
3-COMPONENT
WT.PERCENTS
F 45.55
M 44.3?
A 10.13
F 47.78
C 41.5H
A 10.63
N 17.28
K 3.08
C 79.64
1270
BASALT
13.19N 40.
H. TAZIEFP
46E
ET?AL.
FISSURE
. 1969
S.E. FLANK ERTA-ALI- ALI BAGU, AFAR
SIo2
TI02
AL203
FE2O3
FEO
MNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
CO<i
S03
TOTAL
ORIGINAL
ANALYSIS
48.60
2.74
13.10
2.43
10.05
.19
5.52
10.25
3.45
1.10
.60
1.57
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.60
WATER-C02-FREE
49.58
2.80
13.36
2.48
10.25
.19
5.63
10.46
3.52
1.12
.61
(100.0)
SITI
ALFE3
FE2MN
MGCA
NA
K
P
H*H-
Cs
0
ATOMS
WEIGHT
22.71
1.64
6.93
1.70
7.81
.15
3.33
7.33
2.56
.91
.26
.02
0.00
0.00
0.00
44.25
ATOMS
NUMBERS (100.0)
18.35
.78
5.83
.69
3.18
.06
3.11
4.15
2.53
.53
.19
60.60
0
CB
ORAB
ANNE
LC
ACNS
DI
WOHY
OLMT
HMIL
TIRU
APCC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
6.65
29.83
17.31
0.00
0.00
0.00
0.00
25.61
0.00
.34
10.01
3.60
0.00
5.30
0.00
0.00
1.34
0.00
.60
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.68
27.31
17.39
1.45
0.00
0.00
0.00
26.06
0.00
0.00
14.44
0.00
0.00
5.33
0.00
0.00
1.34
0.00
.50
NIGGLl
SIAL
FMC
ALKK
MS
TIP
C/FM
OZ
117
18.6
45.0
26.6
9.8
.17
.44
5.0
.61
.59
-22
3-COMPONENT
WT.PERCENTSF
M
A
FC
A
N
K
C
O.I.
55.34
24.48
20.18
45.75
37.57
16.66
23.31
7.43
69.26
69.33
No. 1270
REMARKS: See under 1268.
No. 1271
MINERALOGY: As for 1269, except plagioclase pheno-
crysts much more abundant than olivine.
No. 1272
REMARKS: See under 1269.
1271
PORPHYRITIC BASALT
13.22N 40.34E. FISSURE FLOW,
H. TAZIEFF ET AL.? 1969
S.w. FLANK ALI BACJU. N. AFAR
SIO2
TIO2
AL2O3
FE2O3
FEO
MNOMGO
CAO
NA2O
K2U
P2O5
H2O+
H2O-
CO2
503
TOTAL
ORIGINAL
ANALYSIS
49.26
1.83
15.89
4.79
6.43
.10
5.24
12.02
2.87
.53
.26
? 22
.30
0.00
0.00
0.00
0.00
0.00
0.00
99.74
WATER-C02-FREE
(100.0)
49.65
1.84
16.01
4.83
6.48
.10
5.28
12.11
2.89
.53
.26
SITI
ALFE3
FE2MN
MG
CANA
KP
H*H-
C5
ATOMS
WEIGHT
23.01
1.10
8.41
3.35
5.00
.08
3.16
8.59
2.13
.44
.11
.00
.00
0.00
0.00
ATOMS
NUhBERS (100.0)
18.22
.51
6.93
1.34
1.99
.03
2.89
4.76
2.06
.25
.08
0CB
ORAB
ANNE
LCAC
NS
DIWO
HYOL
MT
HMIL
TI
RUAP
CC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
1.52
0.00
3.16
24.52
29.10
0.00
0.00
0.00
0.00
23.79
0.00
6.82
0.00
7.01
0.00
3.50
0.00
0.00
.57
0.00
.77
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.19
24.75
29.37
0.00
0.00
0.00
0.00
24.88
0.00
3.40
10.29
0.00
0.00
3.53
0.00
0.00
.58
0.00
.52
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
116
22.1
40.0
30.5
7.4
.11
.46
3.3
.26
.76
-13
3-COMPONENT
WT.PERCENTS
F 56.50
M 26.38
A 17.12
42.12
45.12
12.76
1272
ANKARAMITIC BASALT
13.21N 40.52E. FISSURE FLOW.
H. TAZIEFF ET AL.. 1969
IMMEDIATELY W. OF LAKE JULIETTI, AFAR
SJ02
TI02
AL203
FE203
FEOMNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
49.30
1.50
13.40
2.26
8.03
.15
9.32
12.50
2.45
.30
.18
1.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.45
t?ATER-C02-FREE
(100.0)
49.60
1.51
13.48
2.27
8.08
.15
9.38
12.58
2.47
.30
.18
SITI
ALFE3
FE2
MNMG
CANA
KP
H*H-
Cs
ATOMS
WEIGHT
23.03
.90
7.09
1.58
6.24
.12
5.62
8.93
1.82
.25
.08
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
18.14
.42
5.81
.63
2.48
.05
5.12
4.93
1.75
.14
.06
0
CBOR
ABAN
NELC
AC
NS01
WO
HYOL
MT
HMIL
TIRJ
APCC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
1.79
20.90
24.80
0.00
0.00
0.00
0.00
29.61
0.00
7.12
9.22
3.30
0.00
2.86
0.00
0.00
.40
0.00
.74
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
1.80
20.99
24.91
0.00
0.00
0.00
0.00
30.09
0.00
2.86
16.08
0.00
0.00
2.88
0.00
0.00
.40
0.00
.66
SIAL
FMC
ALKK
MG
TIP
C/FM
OZ
10617.0
48.5
28.9
5.5
.07
.62
2.4
.16
.60
-16
3-COMPONENT
WT.PERCENTS
F
MA
F
C
A
46
41
12
40
48
10
.02
.68
.30
.29
.94
.77
1273
PORPHYRITIC BASALT
13.18N 40.42Et FISSURE FLOOD.
H. TAZIEFF ET AL.. 1969
S. FLANK ALI BAGU, AFAR
SIO2
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
49.52
1.63
14.85
4.55
6.99
.15
6.25
12.02
2.60
.45
.24
.03
.60
0.00
0.00
0.00
0.00
0.00
0.00
99.88
WATER-C02-FREE
49.89
1.64
14.96
4.58
7.04
.15
6.30
12.11
2.62
.45
.24
(100.0)
SI
TIAL
FE3FE2
MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
23.14
.98
7.86
3.18
5.43
.12
3.77
8.59
1.93
.37
.10
.00
.01
0.00
0.00
44.40
ATOMS
NUMBERS (100.0)
18.32
.45
6.48
1.27
2.17
.05
3.45
4.77
1.87
.21
.08
60.89
0
CB
ORAB
ANNE
LCAC
NSDI
MOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN PEM1CS =
WEIGHT NORM
(100.0)
1.67
0.00
2.69
22.21
27.70
0.00
0.00
0.00
0.00
25.07
0.00
10.36
U.00
6.66
0.00
3.12
0.00
0.00
.53
0.00
.75
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
2.71
22.40
27.94
0.00
0.00
0.00
0.00
26.04
0.00
6.22
9.01
0.00
0.00
3.14
0.00
0.00
.53
0.00
.54
NIGGLI
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
114
20.
43.'
29.=
6.
.
2.t
.<
,i
10
>0
.4
>9
-12
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
55.37
29.99
14.64
43.37
45.17
11.46
17.25
2.99
79.76
64.87
No. 1273
REMARKS: See under 1271.
No. 1274
REMARKS: See under 1268.
No. 1275
REMARKS: See under 1268.
1274
BASALT
13.53N 40.24E.
H. TAZIEFF ET AL.
N.w. BASE ALU. N. AFAR
SI 02
TI02
AL203
FE2O3
FEO
MNO
MGO
CAO
NA20
K2U
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
49.80
2.24
13.50
2.37
9.81
.18
6.62
10.90
3.35
.78
.42
.82
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.79
WATER-C02-FKEE
(100.0)
49.81
2.24
13.50
2.37
9.81
.18
6.62
10.90
3.35
.78
.42
SITI
ALFE3
FE2
MNMG
CA
NAK
PH*
H-C
s
ATOMS
WEIGHT
23.27
1.34
7.14
1.66
7.63
.14
3.99
7.79
2.49
.65
.18
.01
0.00
0.00
0.00
ATuMS
NUMBERS (100.0)
18.36
.62
5.87
.66
3.03
.06
3.64
4.31
2.40
.37
.13
0
CBOR
ABAN
NE
LCAC
NS
01WO
HYOL
MT
HM
ILTl
RU
APCC
MGO/MGOtFEO
IN FEH1CS =
WEIGHT NORM
(100,0)
0.00
0.00
4.62
28.41
19.46
0.00
0.00
0.00
0.00
26.47
0.00
1.95
10.47
3.44
0.00
4.25
0.00
0.00
.92
0.00
.63
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.64
26.94
19.55
.86
0.00
0.00
0.00
26.91
0.00
0.00
15.90
0,00
0.00
4.27
0.00
0.00
.92
0.00
.54
SIAL
FM
CALK
114
18
46
26
8
C/FM
QZ
3-COMPONENT
rtT.PERCENTS
F
M
A
F
CA
N
K
C
53.12
28.87
IB.01
44.76
40.06
15.18
22.29
5.19
72.52
1275
BASALT
13.33N 40.29E.
H. TAZIEFF ET AL.
?I* BASE OF ALI BAGU.
1969
SI02
TI02
AL203
FE2O3
FEO
UNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINALANALYSIS
49.87
2.39
11.21
5.47
8.23
.14
6.25
11.44
2.65
.60
.29
.26
.40
0.00
0.00
0.00
0.00
0.00
0.00
99.20
V?ATER-C02-FREE
(100.0)
50.61
2.43
11.38
5.55
8.35
.14
6.34
11.61
2.69
.61
.29
SITI
ALFE3
FE2MN
Mo
CANA
K
PH*
H-C
s
ATOMS
WEIGHT
23.30
1.43
5.93
3.83
6.40
.11
3.77
8.18
1.97
.50
.13
.00
.00
0.00
0.00
ATuMS
NlMBtRS (100.0)
18.79
.68
4.98
1.55
2.60
.04
3.52
4.62
1.94
.29
.09
0
CBOR
ABAN
NE
LCAC
NSDI
WOHY
OLMT
HMIL
TIRU
APCC
MGO/MGO?FEO
IN FEMCS =
WEIGHT NORM
(100.0)
4.06
0.00
3.61
22.80
17.14
0.00
0.00
0.00
0.00
31.35
0.00
7.73
0.00
8.07
0.00
4.60
0.00
0.00
.64
0.00
.75
NON-OXIDAT IUN NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
3.64
23.04
17.32
0.00
0.00
0.00
0,00
32.74
0.00
12.77
5.18
0.00
0.00
4.65
0.00
0.00
.65
0.00
.51
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
118
15.6
48.4
29.0
7.0
.1
.4
W
.1
.6
-10
3-COMPONENT
WT.PERCENTS
F 59.05
48.2640.30
11.45
18.04
4.08
77.88
1276
BASALT
13.51N 40.28Et
H. TA^IEFF fcT AL.
H. SLOPES ALU,
1969
SIO2
TIO2
AL2O3
FE203
FEOMNO
M60
CAO
NA2O
K2O
P2Q5
H2O*
H2O-
CO2
S03
TOTAL
0
CBOR
ABAN
NELC
ACNS
DIWO
HYOL
MT
HM
ILTI
RU
APCC
MGO/MGO+FEO
IN FEMICS =
ORIGINAL
ANALYSIS
SO. 60
2.10
13.40
1.93
10.10
.19
6.28
10.25
3.35
.67
.36
.72
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.95
HEIGHT NORM
(100.0)
0.00
0.00
4.00
28.62
19.66
0.00
0.00
0.00
0.00
24.36
0.00
10.10
5.63
2.83
0.00
4.02
0.00
0.00
.79
0.00
.60
WATER-C02-FREE
(100.0)
50.99
2.12
13.50
1.94
10.18
.19
6.33
10.33
3.38
.68
.36
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.01
28.73
19.74
0.00
0.00
0.00
0.00
24.68
0.00
6.38
11.64
0.00
0.00
4.03
0.00
0.00
.80
0.00
.53
SITl
AL
FE3FE2
HNMG
CANA
KP
H*H-
Cs
0
ATOMS
WEIGHT
23.64
1.26
7.09
1.35
7.85
.15
3.79
7.33
2.49
.56
.16
.01
0.00
0.00
0.00
44.29
NIGGLl
SIAL
FMC
ALKK
MGTI
P
C/FMOZ
ATOMS
NUMBERS
18.75
.59
5.85
.54
3.14
.06
3.47
4.07
2.41
.32
.11
60.70
120
18.8
46.3
26.2
8.8
.12
.48
3.8
.36
.57
-15
(100.0)
3-COMPONENT
WT,
FM
A
FC
A
N
KC
D.I.
.PERCENTS
53.87
28.12
18.00
45.74
38.97
15.29
23.48
4.7U
71.83
65.70
No. 1276
REMARKS: See under 1268.
No. 1277
REMARKS: See under 1268.
No. 1278
MINERALOGY: Aphyric; dark rocks extremely fine-
grained. Groundmass: Abundant glass with magnetite,
abundant sodic plagioclase (ca. 50% mode), some pale-
coloured clinopyroxene.
OTHER INFORMATION: Forms flows at the northern
end of the Erta-ali chain, and also an end-phase posterior
to the alkali rhyolites of the chain volcanoes.
1277
BASALT
13.36N 40.396,
H. TAilEFF ET AL.
ERTA-ALI CALDERA,
? 1969
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
C02SO3
TOTAL
ORIGINAL
ANALYSIS
50.71
3.15
9.07
6.27
11.24
.20
4.83
8.62
3.40
1.17
.42
.32
.63
0.00
0.00
0.00
0.00
0.00
0.00
100.03
WATER-C02-FREE
(100.0)
51.18
3.18
9.15
6.33
11.34
'.20
4.87
8.70
3.43
1.18
.42
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-
CS
ATOMS
WEIGHT
23.69
1.89
4.80
4.39
8.74
.15
2.91
6.16
2.52
.97
.18
.00
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
19.25
.90
4.06
1.79
3.58
.06
2.74
3.51
2.50
.57
.14
0
C8OR
ABAN
NELC
ACNS
DI
woHY
OL
MT
HMIL
TIRU
Wfc.IGHT NORM
(100.0)
4.29
0.00
6.99
29.09
6.05
0.00
0.00
0.00
0.00
28.60
0.00
8.82
0.00
9.19
0.00
6.03
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
7.08
29.45
6.12
0.00
0.00
0.00
0.00
29.80
0.00
13.30
7.22
0.00
0.00
6.11
0.00
0.00
SIAL
FMC
ALK
KMG
TIP
C/FM
QZ
126
13
53
23
10
5
-14
3-COMPuNENT
WT.PERCENTS
F 65.07
M 17.95
A 16.98
F 57.04C 28.00
A 14.89
N 25.78K 8.87
C 65.35
MGO/MG0*FEO
IN FEMICS =
1278
SOOIC TRACHYTE
13.58N 40.24E,
H. TAilEFF ET AL.
GADA ALII
> 1969
S. END L. ASSALE IKARUM)> N. AFAR
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
HZO*
H2Q-
C02
S03
ORIGINAL
ANALYSIS
55.28
.10
).52
>.69
).59
.23
.41
>.44
>.16
1.60
.82
.76
.76
0.00
0.00
0.00
WATER-C02-FREE
56.50
2.15
9.73
6.84
8. 78
.24
2.46
6.58
4.25
1.64
.84
(100.0)
SITI
AL
FE3FE2
MNMG
CA
NAK
p
H*
H-C
S
ATOMS
WEIGHT
25.83
1.26
5.04
4.68
6.68
.18
1.45
4.60
3.09
1.33
.36
.01
.01
0.00
0.00
AT0M5
NUMBERS (100.0)
20.88
.60
4.24
1.90
2.72
.07
1.36
2.61
3.05
.77
.26
0CB
OR
ABAN
NELC
AC
NS
DIWO
HYOL
MT
HM
ILTI
RU
APCC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
11.77
0.00
9.69
36.05
2.58
0.00
0.00
0.00
0.00
20.99
0.00
3.08
0.00
9.94
0.00
4.07
0.00
0.00
1.83
0.00
.52
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
4.61
0.00
9.81
36.53
2.62
0.00
0.00
0.00
0.00
22.03
0.00
18.41
0.00
0.00
0.00
4.13
0.00
0.00
1.86
0.00
.26
3-COMPONENT
WT.PERCENTS
F
M
A
F
CA
N
KC
65.16
10.28
24.56
55.60
23.44
20.96
34.10
13.11
52.79
1279
SODIC TRACHYTE
13.48N 40.32E. RECENT FLOw<
H. TAZIEFF ET AL.? 1969
ALU SUMMIT. N. AFAR
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H2O*
H2O-
CO2
503
TOTAL
ORIGINAL
ANALYSIS
66.30
2.21
10.65
4.97
8.76
.22
3.43
5.60
4.95
1.25
.70
.23
.63
0.00
0.00
0.00
0.00
0.00
0.00
99.90
WATER-C02-FREE
(100.0)
56.85
2.23
10.75
5.02
8.84
.22
3.46
5.65
5.00
1.26
.71
51Tl
ALFE3
FE2MN
MGCA
NAK
PH*
H-
C
5
0
ATOMS
WEIGHT
26.30
1.32
5.63
3.48
6.81
.17
2.07
4.00
3.67
1.04
.31
.00
.01
0.00
0.00
45.08
ATOMS
NUMBERS (100.0)
20.78
.61
4.63
1.38
2.71
.07
1.89
2.22
3.54
.59
.22
61.36
0
CBOR
AB
AN
NE
LCAC
NSDI
woHY
OL
MT
HM
ILTI
RU
AP
ccMG0/MG0*FEO
It* FEM1CS =
WEIGHT NORM
(100.0)
7.75
0.00
7.48
42.38
3.13
0.00
0.00
0.00
0.00
17.25
0.00
8.95
0.00
7.29
0.00
4.23
0.00
0.00
1.55
0.00
.56
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
2.48
0.00
7.55
42.79
3.16
0.00
0.00
0.00
0.00
17.91
0.00
20.29
0.00
0.00
0.00
4.28
0.00
0.00
1.56
0.00
.36
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 58.78
M 14.68
A 26.54
F 53.78C 21.93
A 24.29
N 41.95K 10.59
C 47.46
No. 1279
REMARKS: See under 1278.
No. 1280
REMARKS: No separate determination of H2O-.
MINERALOGY: Phenocrysts: Scarce An28, colourless
pyroxene, fayalite. Groundmass: Glass, with very fine-
grained anorthoclase and tridymite (determined by X-
rays).
OTHER INFORMATION: Forms dark blocky lava in
flows 30-50 m thick.
No. 1281
REMARKS: See under 1280.
1280
SODIC TRACHYTE
13.26N 40.40E*
H. TAZIEFF ET AL.
ALI BA
> 1969
SUMMIT. S. SIDE. N. AFAR
5102
TI02
AL203
FE203
FEOMNO
MGOCAO
NA20
K20
P205
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
63.10
1.07
12.40
1.26
6.79
.20
1.24
3.58
5.00
3.53
.37
.65
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.19
WATER-C02-FREE
(100.0)
64.03
1.09
12.58
1.28
6.89
.20
1.26
3.63
5.07
3.58
.38
SITl
ALFE3
FE2MN
M&CA
NAK
P
H*H-
CS
ATOMS
WEIGHT
29.48
.64
6.56
.88
5.28
.15
.75
2.56
3.71
2.93
.16
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
22.83
.29
5.29
.34
2.06
.06
.67
1.39
3.51
1.63.11
0CB
ORAB
ANNE
LCAC
NS01
WO
HYOL
MTHM
aTI
RUAP
CC
MGO/MGO+FEO
IN FEMIC5 =
WEIGHT NORM
(100.0)
10.50
0.00
21.22
43.04
.91
0.00
0.00
0.00
0.00
12.84
0.00
6.75
0.00
1.86
0.00
2.06
0.00
0.00
.82
0.00
.29
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
9.17
0.00
21.28
43.14
.91
0.00
0.00
0.00
0.00
12.96
0.00
9.65
0.00
0.00
0.00
2.07
0.00
0.00
.82
0.00
.24
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
234
27.1
32.2
14.3
26.4
.32
.21
3.0
.58
.44
28
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
45.17
6.96
47.S7
39.93
17.76
42.31
41.29
29.15
29.56
86.65
1281
SODIC TRACHYTE
13.27N 40.40E.
H. TAZIEFF ET AL.
ALI BA
? 1969
SUMMIT. S. SIDE. N. AFAR
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
64.00
1.09
12.60
1.48
6.41
.23
1.22
3.54
4.90
3.55
.40
.97
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.39
WATER-C02-FREE
(100.0)
64.37
1.10
12.67
1.49
6.45
.23
1.23
3.56
4.93
3.57
? 40
SITl
ALFE3
FE2
MNMG
CA
NAK
PH*
H-C
s
ATOMS
HEIGHT
29.90
.65
6.67
1.04
4.98
.18
.74
2.53
3.64
2.95
.17
.01
0.00
0.00o.oo
ATuMS
NUMBERS (100.0)
22.92
.29
5.32
.40
1.92
? 07
.6b
1.36
3.40
1.62
.12
Q
CBOR
ABAN
NELC
ACNS
DIMO
HYOL
MTHM
IL
TIRU
APCC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
12.12
0.00
21.16
41.80
1.84
0.00
0.00
0.00
0.00
11.57
0.00
6.38
0.00
2.16
0.00
2.08
0.00
0.00
.88
0.00
.30
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
10.58
0.00
21.22
41.92
1.85
0.00
0.00
0.00
0.00
11.70
0.00
9.77
0.00
0.00
0.00
2.09
0.00
0.00
.88
0.00
.24
SIAL
FMC
ALK
23927. 7
31. a
14.2
26.3
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 44.93
39.69
17.81
42.51
40.8729.61
29.52
1282PANTELLER1TE
13.16N 40.57E?H. TAilEFF ET AL.CONE.
? 1969
S. FLANK. bARAULI. L. JULItTTI. N. AFAR
S1U2TI02
AL203FEZO3
FEUMNO
MGO
CAO
NA20
K2O
P2O5
H2O*H2O-
CO2
SO3
TOTAL
ORIGINALANALYSIS
67.00
.36
12.503.60
2.07
.27
.04
1.25
6.405.55
.02
.60
0.000.00
0.000.00
0.00
o.oo0.00
99.66
KATER-C02-FREE
67.6*
.36
12.623.63
2.09
.27
.0*
1.26
6.465.60
.02
(100.0) SI
TlAL
FE3
FE2MM
MO,
CA
NAK
P
H*H-
CS
0
ATOMS
HEIGHT31.30
.22
6.612.52
1.61
.21
.02
.89
4.754.61
.01
.01
0.000.00
0.00
46.90
ATOMS
NUMBERS (100.0)23.79
.105.23
.96
.62
.OB.02
.48
4.412.52
.01
61.80
0
CB
OR
AB
AN
NELC
AC
NSDI
WO
HY
OLMT
HMIL
TIRU
APcc
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)13.31
0.0033.20
33.650.00
0.000.00
10.54
2.14
5.470.00
.96
0.000.00
0.00
.69
0.000.00
.04
0.00
.03
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
15.060.00
33.4333.89
0.00
o.oo0.00
0.00
4.96
5.52o.oo
6.41
0.000.00
0.00
.69
0.000.00
.04
o.oo
.01
NIGGLI
SIAL
FMC
ALK
KMG
TIP
C/FM
OZ
288
31.720.4
5.B
42.1
.3
.0
1.2
.0
.2
51
3-COMPONENT
WT.PERCENTS
F 32.11
M .23
A 67.67
F 30.05
48.48
42.05
No. 1282
REMARKS: See under 1284.
No. 1283
REMARKS: See under 1284.
No. 1284
REMARKS: Also for 1282, 1283, 1285, 1286. No sepa-
rate determination of H?O-; H-O+ is loss on heating;
high Na/K ratio in rhyolites (less marked in pantellerites
despite higher total alkalis).
MINERALOGY: Phenocrysts: Anl8, occasional corroded
An38-40, rather uncommon pyroxene and fayalitic
olivine. Groundmass: Predominantly glassy.
1283
PANTELLERITE
12.58N 40.13E.
H. TAZIEFF ET AL.
3KM S.
> 1969
OF GAR-ULI, N. AFAR
SIU2
TIO2
AL2O3
FE2O3FEO
MNOMGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2SO3
TOTAL
ORIGINAL
ANALYSIS
71.20
.25
11.60
1.54
2.33
.14
.04
.43
6.20
5.15
0.00
.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.57
WATER-C02-FREE
(100.0)
72.01
.25
11.73
1.56
2.36
.14
.04
.43
6.27
5.21
0.00
SITI
ALFE3
FE2MN
MGCA
NAK
P
H*H-
C
s
ATOMS
WEIGHT
33.26
.15
6.14
1.08
1.81
.11
.02
.31
4.60
4.28
0.00
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.02
.07
4.80
.41
.69
.04
.02
.16
4.23
2.31
0.00
0CB
ORAB
ANNE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
23.75
0.00
30.87
31.29
0.00
0.00
0.00
4.52
3.90
1.92
0.00
3.27
0.00
0.00
0.00
.48
0.00
0.00
0.00
0.00
.03
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
24.53
0.00
30,96
31.39
0.00
0.00
0.00
0.00
5.11
1.93
0.00
5.60
0.00
0.00
0,00
.48
0,00
0,00
0.00
0,00
.02
SIAL
FMC
ALK
KMG
TI
P
C/FM
QZ
357
34.
16.
2.
46.
0.
107
3-COMPONENT
WT.PERCENTS
F 25.36
24.73
2.75
72.52
52.63
43.72
3.65
1284
SODIC RHYOLITE
13.48N 40.30E?
H. TA2IEFF ET AL.
DALAF1LA,
? 1969
OF ALU SUMMIT. N. AFAR
SI02
TI02
AL2O3
FE203
FEO
MNO
MGOCAO
NA20
K2U
P205
H20*
H20-
C02
S03
TOTAL
OKIGINAL
ANALYSIS
71.22
.47
13.11
1.13
2.52
.14
.45
1.61
5.77
2.75
.10
.58
.09
0.00
0.00
0.00
0.00
0.00
0.00
99.94
WATER-C02-FREE
(100.0)
71.74
.47
13.21
1.14
2.54
.14
.45
1.62
5.81
2.77
.10
SITI
ALFE3
FE2MN
MG
CANA
K
P
H*
H-
Cs
ATOMS
WEIGHT
33.27
.28
6.94
.79
1.96
.11
.27
1.15
4.28
2.28
.04
.01
.00
0.00
0.00
AToMS
NUMBERS (100.0)
24.79
.12
5.38
.30
.73
.04
.23
.60
3.90
1.22
.03
0CB
OR
AB
ANNE
LC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
2 = .O5
0.00
16.42
49.31
1.69
0.00
0.00
0.00
0.00
4.95
0.00
1.81
0.00
1.66
0.00
.90
0.00
0.00
.22
0.00
.32
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
21.89
0.00
16.45
49.42
1.70
0.00
0.00
0.00
0.00
5.04
0.00
4.38
0.00
0.00
0.00
.90
0.00
0.00
.22
0.00
.20
SIAL
FM
C
ALKK
MG
TI
P
C/FM
OZ
346
37
IB
8
35
1
103
3-COMPONENT
WT.PERCENTS
F 28.92
M 3.57
A 67.51
26.49
11.68
61.83
56.9627.15
15.89
1285
PANTELLERITE
12.58N 40.15E,
H. TAZIEFF tT AL.
9KM S.E. OF GAR-ULI. N. AFAR
I 1969
SIO2
TIO2
AL2O3
FE203
FEOMNO
MGOCAO
NA2O
K2G
P2O5
H2U+
H2O-
COiSO3
TOTAL
ORIGINAL
ANALYSIS
71.30
.21
11.20
1.19
2.76
.13
.07
.99
6.20
4.35
.05
1.22
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.67
WATER-C02-FREE
(100.0)
72.42
.21
11.38
1.21
2.80
.13
.07
1.01
6.30
4.42
.05
SITI
ALFE3
FE2MN
MiCA
NAtc
PH*
H-C
S
0
ATOMS
WEIGHT
33.31
.13
5.93
.83
2.15
.10
.04
.71
4.60
3.61
.02
.01
0.00
0.00
0.00
48.23
ATOMS
NUMBERS (100.0)
25.15
.06
4.66
.32
.82
.04
.04
.37
4.24
1.96
.01
62.34
0CB
OR
ABAN
NELC
ACNS
DIMO
HY
OLMT
HMIL
TIRU
APCC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
25.09
0.00
26.19
33.88
0.00
0.00
0.00
3.51
3.62
4.17
0.00
3.03
0.00
0.00
0.00
.41o.oo
0.00
.11
0.00
.04
NON-OX I OAT I ON NORM
(FE203 CONVERTED TO FEO)
25.70
0.00
26.25
33.96
0.00
0.00
0.00
0.00
4.56
4.19
0.00
4.83
0.00
0.00
0.00
.41
0.00
0.00
.11
0.00
.03
SI
AL
FM
C
ALK
358
33.
17.
3-COMPONENT
WT.PERCENTS
F 27.11
25.50
6.39
68.11
53.73
37.698.58
No. 1285
REMARKS: See under 1284.
No. 1286
REMARKS: See under 1284.
No. 1287
MINERALOGY: Phenocrysts: An79, olivine Fal4,
clinopyroxene. Groundmass: Plagioclase, olivine,
clinopyroxene, magnetite; zeolites.
1286
SODIC RHYOLlTE
13.48N 40.30E<
H. TAZIEFF ET AL.
DALAFILA,
i 1969
OF ALU SUMMIT. N. AFAR
SIO2
TIO2
AL2O3
FE203FEO
UNOMGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2S03
TOTAL
ORIGINALANALYSIS
71.60
.42
11.50
1.00
2.45
.16
.42
1.44
6.10
3.15
.08
1.04
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.36
WATER-C02-FREE
(100.0)
72.82
.43
11.70
1.02
2.49
.16
.43
1.46
6.20
3.20
.08
SITl
ALFE3
FE2MN
MG
CANA
KP
H*H-
C
S
ATOMS
WEIGHT
33.45
.25
6.08
.70
1.90
.12
.25
1.03
4.53
2.61
.03
.01
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.17
.11
4.76
.26
.72
.06
.22
.54
4.16
1.41
.02
0CB
OR
ABAN
NE
LCAC
NS
DIMO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO?FEO
IN FEMICS =
WEIGHT NORM
(100.0)
25.05
0.00
18.99
42.31
0.00
0.00
0.00
2.95
1.62
5.88
0.00
2.22
0.00
0.00
0.00
.81
0.00
0.00
.18
0.00
.25
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
25.56
0.00
19.02
42.39
0.00
0.00
0.00
0.00
2.41
5.93
0.00
3.70
0.00
0.00
0.00
.81
0.00
0.00
.18
0.00
.20
SIAL
FMC
ALK
361
34.2
18.0
7.B
40.0
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 26.30
M 3.20
A 70.50
F 24.40
C 10.18
A 65.42
N 57.06K 29.47
C 13.47
1287
OLlVlNE BASALT
12.48N 44.116, 1ML N. OF SIR HltfAYRlB, J. KHARIZt S. YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
S102
TI02
AL203
FE203
FEOMNO
MGOCAO
NA20
K20
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
44.91
1.99
15.26
5.22
5.64
.15
8.57
10.46
2.19
.56
.24
1.00
.91
2.90
0.00
0.00
0.00
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
47.18
2.09
16.03
5.48
5.92
.16
9.00
10.99
2.30
.59
.25
SITI
ALFE3
FE2MN
MGCA
NAK
P
H*
H-C
S
ATOMS
HEIGHT
20.98
1.19
8.07
3.65
4.38
.12
5.17
7.48
1.62
.46
.10
.01
.01
.79
0.00
ATOMS
NUMBERS (100.0)
17.27
.58
6.92
1.51
1.82
.05
4.92
4.31
1.63
.27
.08
Q
CBOR
ABAN
NE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
2.33
0.00
3.38
18.93
30.71
0.00
0.00
0.00
0.00
1.68
0.00
24.12
0.00
7.73
0.00
3.85
0.00
0.00
.54
6.74
.90
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.42
19.12
31.03
0.00
0.00
0.00
0.00
1.75
0.00
24.45
8.99
0.00
0.00
3.89
0.00
0.00
.54
6.81
.65
NIGGLI
SIAL
FM
CALK
101
20
48
25
5
C/FM
OZ
3-COMPONENT
WT.PERCENTS
F 48.96
M 36.64
A 12.40
F 45.12
C 43.46A 11.43
N 16.5?K 4.24
C 79.18
1288
OH VINE BASALT
12.48N 44.11E? JEBEL KHARIZ? SOUTH YEMEN
1.G.6ASS AND D.I.J.MALLICK. 1968
S102
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAU
NA2O
<2O
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
45.21
3.28
15.63
6.47
7.86
.21
5.29
9.48
2.98
.75
.34
1.44
.83
.23
0.00
0.00
0.00
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
46.37
3.36
16.03
6.64
8.06
.22
5.43
9.72
3.06
.77
.35
SiTI
AL
FE3FE2
MMMG
CANA
KP
H*H-
CS
0
ATOMS
WEIGHT
21.12
1.97
8.27
4.53
6.11
.16
3.19
6.78
2.21
.62
.15
.02
.01
.06
0.00
44.81
ATOMS
NUMBERS (100.0)
17.24
.94
7.03
1.86
2.51
.07
3.01
3.88
2.20
.37
.11
60.78
DCB
ORAB
ANNE
LCAC
NSDI
MO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
4.54
25.85
27.65
0.00
0.00
0.00
0.00
13.63
0.00
10.73
.32
9.62
0.00
6.37
0.00
0.00
.76
.54
.81
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.60
25.15
28.00
.56
0.00
0.00
0.00
14.45
0.00
0.00
19.47
0.00
0.00
6.45
0.00
0.00
.77
.54
.48
NIGGLI
SIAL
FMC
ALK
KMG
TIP
C/FM
UZ
107
21.U
46.*;
24.1
8.U
.14
.40
5.a
.34
.52
-25
3-COMPONENT
WT.PERCENTS
FM
A
F
CA
NK.
C
D.I.
61.37
22.66
15.97
52.03
34.42
13.54
22.56
5.68
71.76
73.04
No. 1288
MINERALOGY: Phenocrysts: An80-71, olivine Fal6.
Groundmass: An59, Fa24, clinopyroxene, magnetite,
haematite, serpentine, calcite.
No. 1289
MINERALOGY: Phenocrysts: Olivine Fal4. Ground-
mass: An70-60, olivine, clinopyroxene, magnetite,
biotite, calcite.
No. 1290
MINERALOGY: Not given.
1289
OLlVlNE BASALT
12.48N 44.1IE.
I.G.GAS5 AND D.I.
S.W. FLANKf JEBEL ICHARIZ. 50UTH YEMEN
J.MALLICK, 1968
SIU2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H20-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
46.00
1.95
16.17
4.16
6.17
.16
9.00
9.92
2.97
? 99
.74
1.49
.22
0.00
0.00
0.00
0.00
0.00
0.00
99.94
WATER-C02-FREE
(100.0)
46.83
1.99
16.46
4.23
6.28
.16
9.16
10.10
3.02
1.01
.75
SITl
ALFt3
FE2MN
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
21.49
1.17
8.56
2.91
4.80
? 12
5.43
7.09
2.20
.82
.32
.02
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
17.07
.54
7.07
1.16
1.92
.05
4.99
3.95
2.14
.47
.23
0
CBOR
AB
ANNE
LCAC
NSDI
MO
HY
OLMT
HM
ILTI
RU
AP
ccMGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
0.00
0.00
5.97
24.31
28.33
.71
0.00
0.00
0.00
13.86
0.00
0.00
15.24
6.15
0.00
3.77
0.00
0.00
1.65
0.00
.86
NON-OX I DAT ION NORM
(FE2O3 CONVERTED TO FEO)
0.000.00
6.0219.59
28.563.38
0.000.00
0.00
14.35
0.00
0.00
22.64
0.00
0.003.80
0.000.00
1.660.00
.67
3-COMPONENT
WT.PERCENTS
F 44.35
C/FM
OZ
1290
OLlVlNE BASALT
12.48N 44.11E. S.E. FLANK, JEbEL KHARIZ> SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK. 1968
SI02
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-
CO2
SO3
ORIGINAL
ANALYSIS
48.00
3.31
15.70
6.52
5.60
.22
4.30
10.00
3.76
1.05
.91
1.43
.18
0.00
0.00
0.00
0.00
0.00
0.00
100.98
I?ATER-CO2-FREE
48.30
3.33
15.80
6.56
5.64
.22
4.33
10.06
3.78
1.06
.92
(100.0)
SI
TIAL
FE3Ft2
MN
MGCA
NA
KP
H*
H-C
S
ATOMS
WEIGHT
22.43
1.98
8.31
4.56
4.35
.17
2.59
7.15
2.79
.87
.40
.02
.00
0.00
0.00
ATOMS
NUhBfcRS (100.0)
17.79
.92
6.86
1.82
1.74
.07
2.38
3.97
2.70
.50
.29
0
CBOR
AB
ANNE
LCAC
NSDI
WO
HYOL
MT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
1.07
0.00
6.26
32.08
22.96
0.00
0.00
0.00
0.00
16.88
0.00
2.98
0.00
9.27
? IB
6.32
?0.00
0.00
2.00
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
6.34
29.25
23.25
1.75
0.00
0.00
0.00
18.37
0.00
0.00
12.61
0.00
0.00
6.40
0.00
0.00
2.03
0.00
.49
SIAL
FMC
ALKK
MGTl
P
C/FM
OZ
118
22.b
40.0
26.5
10.7
.16
.40
6.1
.95
.66
-24
3-COMPONENT
NT.PERCfcNTS
57.09
20.25
22.66
45.01
37.13
17.86
25.39
7.09
67.52
1291
OLIVINE BASALT
12.48N 44.11E.
I.O.GASS AND O.I.
S.fc. FLANK, JEBEL KHARIZ. SOUTH YEMEN
.MALLICK, 1968
SIU2
TIO2
AL2O3
FE203FEO
MNO
MGUCAO
NA20
K2O
P2O5
H20*
H20-
C02SO3
TOTAL
ORIGINAL
ANALYSIS
48.00
2.14
16.75
4.17
6.63
.19
5.58
9.40
4.25
.77
.77
.78
.14
0.00
0.00
0.00
0.00
0.00
0.00
99.57
WATER-C02-FHEE
(100.0)
46.66
2.17
16.98
4.23
6.72
.19
5.66
9.53
4.31
.78
.78
SITl
AL
FE3FE2
MN
MGCA
NAK
P
H+
H-C
S
0
ATOMS
WEIGHT
22.43
1.28
8.86
2.92
5.15
.15
3.37
6.72
3.15
.64
.34
.01
.00
0.00
0.00
44.56
ATOMS
NUMBERS (100.0)
17.74
.60
7.30
1.16
2.05
.06
3.08
3.72
3.05
.36
.24
60.64
0
CBOR
ABAN
NELC
ACNS
DI
MO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FfcO
IN FEMCS =
WEIGHT NORM
(100.0)
0.00
0.00
4.62
33.17
24.64
1.82
0.00
0.00
0.00
14.60
0.00
0.00
9.18
6.14
0.00
4.12
0.00
0.00
1.71
0.00
.77
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
4.66
28.53
24.84
4.49
0.00
0.00
0.00
15.18
0.00
0.00
16.43
0.00
0.00
4.15
0.00
0.00
1.72
o.oo
.55
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
115
23.6
41.2
24.2
11.1
.11
.48
3.9
.78
.59
-29
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
50.47
26.07
23.46
42.82
37.27
19.90
29.47
5.34
65.19
65.93
No. 1291
MINERALOGY: Phenocrysts: An66-53, olivine Fa32,
clinopyroxene, magnetite. Groundmass: Plagioclase,
clinopyroxene, magnetite.
No. 1292
MINERALOGY: (General description for the Jebel Umm
Birka trachy-basalts). Phenocrysts: Subhedral
plagioclase forming up to 25% of rock (zoned labradorite-
andesine), small pale-brown clinopyroxene, sometimes
subhedral magnetite, Fal6-40. Groundmass: Plagio-
clase laths (An6l-48) with zoning out to more sodic
composition; interstitial magnetite, clinopyroxene,
olivine (or iddingsite); sometimes brown glass, alkali
feldspar, apatite, zeolite.
No. 1293
MINERALOGY: See under 1292.
1292
BASALT
12.46N 44.25E. RAS GHAwA, SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGO
CAO
NA20
K20
P2O5
H2O +
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
49.48
2.72
16.76
5.92
5.28
.19
3.60
9.29
3.74
1.19
.62
.54
.67
0.00
0.00
0.00
0.00
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
50.09
2.75
16.97
5.99
5.34
.19
3.64
9.40
3.79
SI
TIAL
F?3
FE.2
MNMG
CA
NA
ATOMS
WEIGHT
23.12
1.63
8.87
4.14
4.10
.15
2.17
6.64
2.77
ATOMS
NUMBERS (100.0)
18.32
.76
7.31
1.65
1.64
.06
1.99
3.69
2.69
0.00
0.00
0CB
ORAB
AN
NELC
ACNS
DIWO
HYOL
MT
HM
ILTI
RUAP
CC
MGO/MGO.FEO
IN FEMICS =
WEIGHT NORM
(100.0)
2.73
0.00
7.13
32.10
25.70
0.00
0.00
0.00
0.00
13.62
0.00
3.41
0.00
8.71
0.00
5.22
0.00
0.00
1.37
0.00
.95
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
0.00
0.00
7.22
32.47
25.99
0.00
0.00
0.00
0.00
14.77
0.00
2.27
10.61
0.00
0.00
5.29
0.00
0.00
1.39
0.00
.45
C/FM
OZ
3-COMPONENT
wT.PERCENTS
F 56.77
M 18.25
A 24.99
F 44.0b
C 36.55A 19.39
N 26.30
K 8.37
C 65.33
1293
BASALT
12.48N 44.20E. JEBEL SUMIRAH, SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
SI02
TI02
AL2O3
FE203
FEOMNO
MGO
CAO
NA20
K2U
P205
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
51.56
3.02
15.78
2.64
7.86
.233.22
7.69
4.33
1.20
.09
.15
? 32
1.91
0.00
0.00
0.00
0.00
0.00
100.00
WATER-COZ-FREE
52.82
3.09
16.16
2.70
8.05
.24
3.30
7.88
4.44
1.23
.09
(100.0)
SITI
ALFE3
Ft2
MN
MG
CANA
<P
H*H-
C
S
ATOMS
WEIGHT
24.09
1.81
8.35
1.85
6.11
.18
1.94
5.50
3.21
1.00
.04
.00
.00
.52
0.00
ATOMS
NUMBERS (100.0)
19.24
.85
6.94
.74
2.46
.07
1.79
3.08
3.13
.57
.03
0CB
OR
ABAN
NE
LCAC
NSDI
WO
HYOL
MTHM
ILTI
RU
WEIGHT NORM
(100.0)
3.49
0.00
7.14
36.89
20.13
0.00
0.00
0.00
0.00
4.62
0.00
13.54
0.00
3.85
0.00
5.76
0.00
0.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
.69
0.00
7.18
37.08
20.23
0.00
0.00
0.00
0.00
4.74
0.00
19.70
0.00
0.00
0.00
5.79
0.00
0.00
AP
CC
MGO/MGO+FEO
Irt FEMICS =
SIAL
FMC
ALK
K
MGTI
P
C/FM
OZ
143
25.7
37.6
22.9
13. b
.15
.35
6.3
.11
.61
-12
3-COMPONENT
WT
FM
A
F
CA
N
K
C
.PERCENTS
54.55
16.73
28.73
44.27
32.42
23.31
32.75
9.08
58.17
1294
MICROcJABBRO (INTRUSIVE)
12.48N 44.22E. CENTRAL TO^ER.
l.G.GASS AND O.I.J.MALLICK. 1968
J. KHARIZ? SOUTH YEMEN
SIO2
TIO2
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA2O
K2U
P2O5
H2O*
H2O-
CO2
SO3
TOTAL
0CB
OR
ASAN
NE
LCAC
N5DI
MO
HY
OL
MTHM
IL
TIRU
APCC
MGO/MGO*FEO
IN FEhlCS =
ORIGINAL
ANALYSIS
53.00
1.87
17.25
1.89
7.04
.18
3.05
7.43
4.60
1.85
.60
1.16
.45
0.00
0.00
0.00
0.00
0.00
0.00
100.37
WEIGHT NORM
(100.0)
0.00
0.00
11.10
39.50
21.17
0.00
0.00
0.00
o.oo
10.52
0.00
6.60
3.41
2.78
0.00
3.59
0.00
0.00
1.33
0.00
.54
t?ATER-C02-FREE
(100.0)
53.67
1.89
17.47
1.91
7.13
.18
3.09
7.52
4.66
1.87
.61
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
O.OO
11.14
39.64
21.24
0.00
0.00
0.00
0.00
10.71
0.00
2.82
9.51
0.00
0.00
3.61
0.00
0.00
1.33
0.00
.43
SITI
ALFE3
FE2MN
Mb
CANA
KP
H+
H-C
S
0
ATOMS
WEIGHT
24.76
1.12
9.13
1.32
5.47
.14
1.84
5.31
3.41
1.54
.26
.01
.01
0.00
0.00
46.05
NIGGLl
SIAL
FM
CALK
K
MGTI
P
C/FM
QZ
ATOMS
NUMBERS
19.37
.51
7.43
.52
2.16
.06
1.66
2.91
3.26
.86
.19
61.07
148
28.4
33.6
22.3
15.8
.?!1
.38
3.9
.71
.66
-15
(100.0)
3-COMPONENT
MT,
FM
A
FC
A
N
K
C
D.I.
.PERCENTS
48.45
16.55
35.00
39.15
32.57
28.28
33.14
13.33
53.53
74.54
No. 1294
MINERALOGY: Phenocrysts: Large subhedral plagio-
clase, zoned both progressively and oscillatory between
An63-18, often with albitic rims. Groundmass:
Colourless pyroxene, serpentinised olivine, magnetite,
accessory albite, alkali feldspar-quartz intergrowths.
No. 1295
MINERALOGY: See under 1296.
No. 1296
MINERALOGY: Sub-trachytic texture. Phenocrysts:
An38-29, clinopyroxene, magnetite. Groundmass:
Plagioclase, clinopyroxene, magnetite, alkali feldspar
(interstitial), apatite.
1295
TRACHYANDESITE
12.48N 44.22E.
J.G.GA5S AND O.I.
CENTRAL TOwER. J,
J.MALLICK, 1968
<HARI2. SOUTH YEMEN
S102
TIO2
AL2O3
FE203
FEO
MNO
MGO
CAO
NA2O
K20
P2O5
H2O*
H2O-
CO2
SO3
ORIGINAL
ANALYSIS
53.00
2.15
U.13
8.58
2.36
.30
2.01
6.67
5.41
1.98
.85
1.76
? 73
0.00
0.00
0.00
0.00
0.00
0.00
99.93
WATER-C02-FREE
(100.0)
54.39
2.21
14.50
8.81
2.42
.31
2.06
6.85
5.55
2.03
.87
SITI
ALFE3
FE2m
MGCA
NA
K.
PH*
H-C
S
ATOMS
WEIGHT
24.76
1.29
7.48
6.00
1.83
.23
1.21
4.77
4.01
1.64
? 37
.02
? 01
0.00
0.00
ATOMS
NUMBERS (100.0)
19.73
.60
6.20
2.41
.74
.09
1.12
2.66
3.91
.94
.27
0CB
ORAB
ANNE
LCAC
NSDI
WO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
3.00
0.00
12.04
47.08
8.58
0.00
0.00
0.00
0.00
11.11
2.53
0.00
0.00
2.44
7.14
4.19
0.00
0.00
1.91
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
12.24
45.74
8.73
1.16
0.00
0.00
0.00
17.69
0.00
0.00
8.25
0.00
0.00
4.26
0.00
0.00
1.94
0.00
.32
C/FM
QZ
3-COMPONENT
WT.PERCENTS
F 53.79
43.7b
26.6b
29.56
c
D.I.
38.4814.08
47.44
1296
TRACHYANDESITE
12.48N 44.11E. JEBEL KHARIZ. SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK. 1968
SI02
TI02
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
K20
P205
H20*
H20-
C02
503
TOTAL
ORIGINAL
ANALYSIS
56.00
1.79
14.85
8.33
2.04
.21
2.63
4.19
5.50
2.67
.65
.86
.86
0.00
0.00
0.00
0.00
0.00
0.00
100.58
WATER-C02-FREE
56.65
1.81
15.02
8.43
2.06
.21
2.66
4.24
5.56
2.70
.66
(100.0)
SITI
ALFE3
FE2
MNMG
CANA
K
PH*
H-C
s
ATOMS
WEIGHT
26.16
1.07
7.86
5.83
1.59
.16
1.59
2.99
4.08
2.22
.28
.01
.01
0.00
o.oo
ATOMS
NUMBERS (100.0)
20.34
.49
6.36
2.28
.62
.06
1.43
1.63
3.88
1.24
.20
0
CBOR
ABAN
NELC
AC
NSDI
WO
HYOL
MTHM
ILTI
RU
APCC
MGO/MG0*FE0
IN FEMICS =
WEIGHT NORM
(100.0)
4.38
0.00
16.00
47.18
7.97
0.00
0.00
0.00
0.00
7.19
0.00
3.31
0.00
2.11
6.99
3.44
0.00
0.00
1.44
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
16.26
47.95
8.10
0.00
0.00
0.00
0.00
7.96
0.00
9.05
5.72
0.00
0.00
3.49
0.00
0.00
1.46
0.00
.39
173
27. 0
37.3
13.9
21.8
.24
pC/FM
QZ -14
.85
.37
3-COMPONENT
WT.PERCENTS
F 48.98
M 12.42
A 38.59
F 45.62
C 18.43A 35.94
N 44.50
K 21.60C 33.90
1297
TRACHYTE
12.48N 44.HE, 3ML E. OF FORT UMAyRAH,
I.G.3ASS AND D.I.J.MALLICK. 1966
J. KHARIZ. SOUTH YEMEN
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
<2O
P2O5
H2O+
H2O-
CO2
SO3
TOTAL
ORIGINAL
ANALYSIS
63.00
1.05
14.45
3.35
4.76
.29
.57
2.78
5.39
3.13
.25
1.42
0.00
0.00
0.00
0.00
0.00
0.00
0.00
100.44
WATER-C02-FREE
(100.0)
63.62
1.06
14.59
3.38
4.81
.29
.58
2.81
5.44
3.16
.25
SITI
ALFE3
FE2
MN
MG
CANA
KP
H+
H-C
s
0
ATOMS
WEIGHT
29.43
.63
7.65
2.34
3.70
.22
.34
1.99
4.00
2.60
.11
.02
0.00
0.00
0.00
47.41
ATOMS
NUMBERS (100.0)
22.58
.28
6.10
? 91
1.43
.09
.30
1.07
3.75
1.43
.08
61.98
0
CBOR
ABAN
NELC
AC
NS
01
MO
HYOL
MTHM
IL
TIRU
APCC
MGO/MGO+FEU
IN FEMICS =
WEIGHT NORM
(100.0)
12.65
0.00
18.73
46.17
5.98
0.00
0.00
0.00
0.00
5.59
0.00
3.40
0.00
4.92
0.00
2.01
0.00
0.00
.55
0.00
.28
NON-OXIDATION NORM
(FE203 CONVEKTED TO FEO)
9.13
0.00
18.85
46.47
6.02
0.00
0.00
0.00
0.00
5.74
0.00
11.21
0.00
0.00
0.00
2.03
0.00
0.00
.56
0.00
.13
NIGGLI
SIAL
FM
C
ALK
K
MaTI
P
C/FM
OZ
239
32
28
11
27
3
29
3-COMPONENT
WT.PERCENTS
F 47.15
M 3.31
A 49.53
F 41.78
C 14.32
A 43.89
C
D.I.
47.7027.70
24.60
No. 1297
MINERALOGY: Phenocrysts: Oligoclase-andesine,
magnetite, pale-green augite. Groundmass: Trachytic
texture; albite-oligoclase; scarce magnetite, serpentine
(after olivine), apatite.
No. 1298
MINERALOGY: Medium-grained, equigranular. Ground-
mass: Mode: 70% alkali feldspar (anorthoclase); 5%
oligoclase (An27); 10% quartz; 15% green clinopyroxene,
sodic amphibole, magnetite. Femic minerals may be
complexly zoned, with pyroxene and amphibole occur-
ring in the same crystal, and showing end-stage alkali
enrichment.
No. 1299
MINERALOGY: Not given.
1298
QUARTZ MlcROSYENITE (INTRUSIVE)
12.48N 44.11E, 1KM E. OF CENTRAL TOwER,
I.G.GASS AND D.I.J.MALLICK, 1968
J. tCHARlz, SOUTH YEMEN
SIO2
TIO2
AL2O3
FE2O3
FEOMNO
MGOCAO
NA2O
K2O
P2O5
H2O*
H2O-
COZS03
TOTAL
ORIGINAL
ANALYSIS
63.40
.96
14.15
5.47
3.24
.28
.32
1.49
6.36
3.59
.20
.95
.32
0.00
0.00
0.00
0.00
0.00
0.00
100.73
WATER-C02-FREE
(100.0)
63.74
.97
14.23
5.50
3.26
.28
.32
1.50
6.39
3.61
.20
SITI
ALFE3
FE2MN
M6CA
NAK
P
H*H-
CS
ATOMS
WEIGHT
29.62
.58
7.49
3.83
2.52
.22
.19
1.06
4.72
2.98
.09
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
22.59
.26
5.94
1.47
.97
.08
.17
.57
4.40
1.63
.06
0CB
OHAB
AN
NELC
ACNS
DI
WOHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO+FEO
If* FEMICS =
WEIGHT NORM
(100.0)
10.69
0.00
21.39
53.05
0.00
0.00
0.00
1.04
0.00
2.99
1.10
0.00
0.00
7.47
0.00
1.83
0.00
0.00
? 44
0.00
.61
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
5.48
0.00
21.61
53.62
0.00
0.00
0.00
0.00
.28
5.59
0.00
11.12
0.00
0.00
0.00
1.85
0.00
0.00
.44
0.00
.07
SIAL
FMC
ALK
KMG
TIP
C/FM
QZ
244
32.1
29.1
6.2
32.6
.2
.0
2.a
.3
.2
15
3-COMPOUENT
WT.PERCENTS
F 45.89
43.23
7.39
49.38
55.5931.3b
13.02
1299
TRACHYTE AGGLOMERATE
12.48N 44.11Et CALDERA. JEBEL KHARIZ. SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
SI02
TI02
AL203
FE203
FEO
MNOMGO
CAO
NA20
K20
PZ05
H20*
HZO-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
65.00
1.06
13.05
5.80
2.07
.23
1.15
2.31
5.40
3.27
.15
? 39
.47
0.00
0.00
0.00
0.00
0.00
0.00
100.35
WATER-C02-FREE
65.33
1.07
13.12
5.83
2.08
.23
1.16
2.32
5.43
3.29
.15
(100.0)
SITI
ALFt3
FEZ
MNMb
CANA
KP
H*H-
Cs
ATOMS
WEIGHT
30.37
.64
6.90
4.06
1.61
.18
.69
1.65
4.01
2.71
.07
.00
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
23.08
.28
5.46
1.55
.62
.07
.61
? 88
3.72
1.48
.05
0CB
ORAB
ANNE
LCAC
NS
DI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
wtlGHT NORM
(100.0)
16.63
0.00
19.47
46.04
1.65
0.00
U.00
0.00
0.00
6.23
.42
0.00
0.00
4.39
2.82
2.02
0.00
0.00
.33
0.00
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
11.66
0.00
19.69
46.55
1.67
0.00
0.00
0.00
0.00
7.87
0.00
10.17
0.00
0.00
0.00
2.05
0.00
0.00
.33
0.00
.25
SIAL
FMC
ALK
K.MG
TIP
C/FM
QZ
254
30.1
31.4
9.7
28.7
.2
,1
3.1
.2
.3
39
3-COMPONENT
WT.PE.HCENTS
F 44.49
M 6.50
A 49.01
F 41.75
C 12.25
A 45.99
N 49.1U
K 29.78
C 21.04
1300
QUARTZ TRACHYTfc
12.48N 44.20E.
I.G.GASS AND D.I.
JEBEL SUMIRAH, SOUTH YEMEN
J.MALLICK, 1968
SI02
TI02
AL2O3
FE2O3
FEOmo
MGO
CAO
NA20
K2O
P2O5
H20 +
H2Q-
C02
S03
F
CL
TOTAL
ORIGINAL
ANALYSIS
66.87
.45
13.02
3.85
1.07
.18
.24
4.12
4.79
3.51
.10
.09
1.04
.54
0.00
.08
.05
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
68.10
.46
13.26
3.92
1.09
.18
.24
4.20
4.88
3.57
.10
SITI
ALFE3
FE2HN
MGCA
NAK
P
H*
H-C
S
0
ATOMS
WEIGHT
31.24
.27
6.89
2.69
.83
.14
.14
2.94
3.55
2.91
.04
.00
.01
.15
0.00
48.04
ATuMS
NUMBERS (100.0)
23.88
.12
5.46
1.04
.32
.05
.13
1.58
3.32
1.60
.03
62.46
0
CBOR
ABAN
NE
LCAC
NS
01
MO
HY
OL
MT
HM
1LTI
RU
APCC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
20.99
0.00
21.06
41.15
3.64
0.00
0.00
0.00
0.00
1.31
4.75
0.00
0.00
2.78
1.99
.87
0.00
0.00
.22
1.25
1.00
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
17.75
0.00
21.22
41.46
3.67
0.00
0.00
0.00
0.00
11.58
0.00
1.97
0.00
0.00
0.00
.87
0.00
0.00
.22
1.26
.10
NIGGLI
SIAL
FMC
ALKK
MGTI
PC/FM
OZ
287
32.9
18.5
19.0
29.6
.3
.0
1.5
.1
1.0
68
3-COMPONENT
WT.PERCENTS
F 36.55
28.3723.76
47.87
38.5728.26
33.17
No. 1300
MINERALOGY: Phenocrysts: Anorthoclase, divine Fa94,
sodic ferro-hedenbergite, magnetite. Groundmass:
Same minerals as phenocrysts, plus quartz.
No. 1301
MINERALOGY: Phenocrysts: Euhedral anorthoclase,
bright-green sodic ferro-hedenbergite. Groundmass:
Very fine-grained quartz, alkali feldspar, small needles
green clinopyroxene, accessory haematite, sodic
amphibole (cossyrite?).
No. 1302
MINERALOGY: See under 1300.
1301
RHYOLITE
12.48N 44.UE, 2ML ESE OF BlR HIWAYRlB,
I.G.GASS AND D.I.J.MALLICK, 1968
J. KHARIz* SOUTH YEMEN
SI02
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P205
M20*
H20-
C02
SO 3
TOTAL
ORIGINAL
ANALYSIS
67.00
.49
13.56
3.90
2.30
.29
.31
1.91
5.71
3.05
.08
1.10
.33
0.00
0.00
0.00
0.00
0.00
0.00
100.03
WATER-C02-FREE
(100.0)
67.95
.50
13.75
3.96
2.33
.29
.31
1.94
5.79
3.09
.08
SITI
ALFE3
Ft2MN
MGCA
NAK
PH*
H-C
s
ATOMS
WEIGHT
31.30
.29
7.17
2.73
1.79
.22
.19
1.37
4.24
2.53
.03
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
23.78
.13
5.67
1.04
.66
.09
.16
.73
3.93
1.38
.02
0CB
ORAB
ANNE
LC
ACNS
DI
WOHY
OLMT
HMIL
TI
RUAP
CC
WLIGHT NORM
1100.0)
18.97
0.00
18.33
49.12
2.32
0.00
0.00
0.00
0.00
3.10
1.29
0.00
0.00
5.75
0.00
.94
0.00
0.00
.18
0.00
NON-OX1DAT ION NORM
(FE2O3 CONVERTED TO FEO)
14.90
0.00
18.47
49.50
2.34
0.00
0.00
0.00
0.00
6.07
0.00
7.59
0.00
0.00
0.00
? 95
0.00
0.00
.18
0.00
MGO/MGO*FEO
IN FEMICS =
C
ALK
3-COMPONENT
WT.PERCENTS
F 40.60
M 2.03
A 57.37
F 36.75
C 11.32A 51.93
N 53.51
K 28.58
C 17.90
1302
QUARTZ TRACHYTE
12.48N 44.22t, 150M N. OF J. UMM BlRKA SUMMIT, SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
S102
TI02
AL203
FE203
FEOMHO
MGGCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
F
CL
TOTAL
ORIGINAL
ANALYSIS
67.34
.63
12.49
4.83
1.60
.22
.66
2.68
4.93
3.17
.09
.27
.90
0.00
0.00
.09
.10
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
68.27
.64
12.66
4.90
1.62
.22
.67
2.72
5.00
3.21
.09
SITI
ALFE3
FE2MN
MGCA
NA
KP
H*H-
C
S
ATOMS
WEIGHT
31.46
.38
6.61
3.38
1.24
.17
.40
1.92
3.66
2.63
.04
.00
.01
0.00
0.00
ATUMS
NUMBERS (100.0)
23.96
.17
5.24
1.30
.48
.07
.3b
1.02
3.40
1.44
.03
QCB
ORAB
AN
NELC
ACNS
DIMO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
22.38
0.00
19.04
4 2.39
2.56
3.00
).00
J.00
).00
S.61
.42
.00
j.oo
,.12
.07
.21
).00
).00
.20
0.00
1 00
NON-OX I DAT I ON NORM
(FE203 CONVERTED TO FEO)
18.16
0.00
19.22
42.79
2.58
0.00
0.00
0.00
0.00
9.16
0.00
6.66
0.00
0.00
0.00
1.22
0.00
0.00
.20
0.00
.19
NIGGLl
SIAL
FMC
ALKK
MG
TIP
C/FM
UZ
290
31.7
26.5
12.4
29.4
.30
.16
2.0
.16
.47
72
3-COMPONENT
WT.PERCENTS
F 42.33
M 4.34
A 53.32
F 37.36
C 15.57
A 47.07
N 45.73
K 29.41
C 24.86
1303
COMENoITE
12.48N 44.11E, JEBEL KHARI2. SOUTH YEMEN
I.G.GASS AND D.I.J.MALLICK, 1968
5102
TI02
AL203
FE203
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
F
CL
TOTAL
ORIGINAL
ANALYSIS
68.33
.45
11.65
4.64
.08
.23
.33
2.40
4.69
3.06
.10
.22
.97
2.59
0.00
.02
.04
0.00
0.00
100.00
WATER-C02-FREE
71.06
.47
12.12
5.03
.08
.24
.34
2.50
4.88
3.18
.10
(100.0)
SITI
ALFE3
FE2
MNMG
CANA
KP
M*H-
Cs
0
ATOMS
WEIGHT
31.92
.27
6.16
3.39
.06
.18
.20
1.72
3.48
2.54
.04
.00
.01
.71
0.00
49.26
ATOMS
NUMBERS (100.0)
24.75
.12
4.97
1.32
.02
.07
.18
.93
3.30
1.42
.03
62.89
C02 EXCESS
0CB
ORAB
ANNE
LCAC
MS
DI
MO
HYOL
MT
HMIL
TIRU
APCC
MGO/MGO+FEO
IN FEMICS =
.80
WEIGHT NORM
(100.0)
29.09
.61
18.38
40.33
0.00
0.00
0.00
0.00
0.00
0.00
U.00
.84
0.00
0.00
4.92
.67
0.00
.00
.22
4.14
1.00
.80
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
26.05
.61
18.54
40.67
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.05
0.00
0.00
0.00
.87
0.00
0.00
.22
4.17
.13
NIGGLI
SI
ALFM
C
ALKK
MGTI
P
C/FM
OZ
335
33.7
21.6
12.7
32.0
.3
.1
1.7
.5
107
3-COMPONENT
WT.PERCENTS
F 37.85
32.65
15.93
51.43
46.21
30.15
23.65
NO. 1303
MINERALOGY: Phenocrysts: Common anorthoclase,
rare sodic ferro-hedenbergite, rare fayalitic olivine,
magnetite. Groundmass: Quartz, feldspar, sodic
pyroxene, magnetite, sodic amphibole (riebeckite);
accessory fluorite, zircon, devitrified glass.
No. 1304
MINERALOGY: See under 1301. Phenocrysts:
Additional cossyrite.
No. 1305
MINERALOGY: See under 1301.
1304
RHYOUTE
12.48N 44.11E. JEBEL KHARIZt SOUTH YEMEN
I.G.GASS AND O.I.J.MALLICK. 1968
SIU2
TI02
AL203
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
FCL
TOTAL
ORIGINAL
ANALYSIS
70.38
.53
7.56
7.14
.83
.29
.31
.76
4.11
3.58
.05
2.66
1.47
0.00
0.00
.14
.19
0.00
0.00
100.00
WATER-C02-FREE
(100.0)
73.67
.55
7.91
7.47
.87
.30
.32
? 80
4.30
3.75
.05
SITI
ALFE3
FE2MN
MGCA
NA
KP
H*
H-
CS
ATOMS
HEIGHT
32.88
.32
4.00
4.99
.65
.22
.19
.54
3.05
2.97
.02
.03
.02
0.00
0.00
ATOMS
NUMBERS (100.0)
25.90
.15
3.28
1.98
.26
.09
.17
.30
2.93
1.68
.02
HEIGHT NORM
(100,0)
36.70
0.00
22.20
19.80
0.00
0.00
1.75
.59
0.00
OLMT
HM
IL
TIRU
APCC
MGO/MGO+FEO
IN FEMIC5 =
0.00
2.19
.90
1.05
0.00
0.00
.11
0.00
1.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
37.32
0.0022.53
20.090.00
0.000.00
0.003.94
3.27
0.0011.67
0.000.00
0.00
1.070.00
0.00
.120.00
.08
MGTI
P
C/FM
OZ
.07
2.2
.12
.12
176
3-COrtPONENT
WT.PERCENTS
F 49.91
M 1.94
A 48.15
F 48.54
48.64
42.37
8.99
1305
RHYOLITE
12.48N 44.11E?
I.G.GASS AND D.I.
JEBEL *HARIZ? SOUTH YEMEN
J.MALLICK, 1968
SI 02
TI02
AL2O3
FE203
FEO
MNOMGo
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
71.00
.29
8.60
4.31
4.83
.31
0.00
.95
4.56
4.33
.64
.10
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.92
WATER-C02-FREE
(100.0)
71.13
.29
8.62
4.32
4.84
? 31
0.00
? 95
4.57
4.34
.64
SITI
ALFE3
F6.2
MM
MGCA
NAK
P
H*H-
CS
ATOMS
WEIGHT
33.17
.17
4.55
3.01
3.75
.24
0.00
.68
3.38
3.59
.28
.00
0.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.23
.08
3.60
1.15
1.44
.09
0.00
.36
3.14
1.96
.19
0CB
ORAB
AN
NE
LC
ACNS
DIWO
HYOL
MTHM
ILTI
RUAP
CC
MGO/MGO*FEO
IN FEMIC5 =
WEIGHT NORM
(100.0)
29.26
0.00
25.70
20.12
0.00
0.00
0.00
12.53
1.03
.85
0.00
6.55
0.00
0.00
0.00
.55
o.oo0.00
1.40
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
31.48
0.00
25.92
20.29
0.00
0.00
0.00
0.00
4.37
.86
0.00
15.11
0.00
0.00
0.00
.56
0.00
0.00
1.41
0.00
0.00
SIAL
FMC
ALK
KMG
TIP
C/FM
OZ
340
24.
36.
34!
0.
1.
1.
133
3-COMPONENT
WT.PERCENTS
F 50.69
M 0.00
A 49.31
F 48.16
C 5.01
A 46.84
N 46.34
K 44.00
1306
COMENDITE DYKE
12.48N 44.22E, SUMMIT JEBEL UMM BlRlCA. SOUTH YEMEN
I.G.GA5S AND O.I.J.MALLICK, 1968
SI02
TI02
AL203
FE203
FEOMNO
MGOCAu
NA20
K20
P2O5
H2U*
H20-
C02
S03
f
TOTAL
ORIGINAL
ANALYSIS
71.54
.19
13.39
.38
2.76
? 11
.18
.98
5.23
4.09
.04
? 35
.50
0.00
0.00
.17
.09
0.00
0.00
100.00
*ATER-C02-FREE
(100.0)
72.34
.19
13.54
.38
2.79
.11
.18
.99
5.29
4.14
.04
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
33.42
.11
7.08
.27
2.15
.09
.11
.70
3.88
3.40
.02
.00
.01
0.00
0.00
48.51
ATOMS
NUMBERS (100.0)
25.01
.05
5.52
.10
.81
.03
.09
.37
3.55
1.83
.01
62.64
0
CBOR
ABAN
NELC
ACNS
DI
MOHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO+FEO
IN FEMICS =
WEIGHT NORM
(100.0)
21.95
0.00
24.51
44.87
.92
0.00
0.00
0.00
0.00
3.32
0.00
3.42
0.00
.56
0.00
.36
0.00
0.00
.09
0.00
.11
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
21.56
0.00
24.53
44.90
.92
0.00
0.00
0.00
0.00
3.33
0.00
4.31
0.00
0.00
0.00
.37
0.00
0.00
.09
0.00
.10
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
365
40.
15.
5.
39.
108
3-COMPONENT
WT.PERCENTS
F 24.84
50.7B
39.71
9.51
No. 1306
MINERALOGY: Similar to 1303.
No. 1307
MINERALOGY: See under 1301.
No. 1308
MINERALOGY: Similar to 1303.
1307
RHY0L1TE
12.48N 44.HE,
I.G.GASS AND O.I.
N. MARQIN CALDERA<
?MALLICK, 1968
J. KHARIz, SOUTH YEMEN
SI02
TI02
AL2O3
FE2O3
FEO
MNOH60
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2
SO 3
TOTAL
ORIGINAL
ANALYSIS
72.00
.51
9.00
7.17
1.57
.29
0.00
.90
5.05
3.14
.04
? 92
? 24
0.00
0.00
0.00
0.00
0.00
0.00
100.83
WATER-C02-FREE
(100.0)
72.24
.51
9.03
7.19
1.58
.29
0.00
.90
5.07
3.15
.04
SITI
ALFE3
FE2MN
MGCA
NAK
P
Ht
H-C
S
ATOMS
WEIGHT
33.64
.31
4.76
5.01
1.22
.22
0.00
.64
3.75
2.61
.02
.01
.00
0.00
0.00
ATOMS
NUMBERS (100.0)
25.42
.14
3.74
1.91
.46
.09
0.00
.34
3.46
1.42
.01
0CB
OR
ABAN
NE
LCAC
NSDI
MOHY
OL
MT
HMIL
TI
RU
APCC
M60/MG0*FE0
IN FEMICS =
WEIGHT NORM
(100.0)
32.77
0.00
18.67
28.88
0.00
0.00
0.00
12.42
0.00
.35
1.61
0.00
0.00
4.23
0.00
.97
0.00
0.00
.09
0.00
0.00
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
32.08
0.0018.93
29.280.00
0.000.00
0.00
3.333.85
0.00
11.46
0.00
0.000.00
.990.00
0.00
SIAL
FM
CALK
KMG
TIP
C/FM
OZ
357
26.3
34.6
4.8
34.3
.i.
0.0
1.9
.0
.1
144
3-COMPONENT
WT.PERCENTS
F 51.62
M 0.00
A 48.3B
F 49.02
C 5.05
A 45.93
N 55.5b
K 34.54
C 9.90
1308
COMENQlTE
12.48N 44.22E<
I.G.GASS AND D.I.
100M S. OF J. UMM BlRKA SUMMIT. SOUTH YEMEN
J.MALLICK. 1968
SIU2
TI02
AL2O3
FE203
FEOMNO
MGoCAO
NA20
K20
P2O5
H2U*
H20-
C02S03
FCL.
TOTAL
ORIGINAL
ANALYSIS
73.28
.35
11.52
2.64
1.77
? 15
.231.07
4.46
3.46
0.00
.72
.72
0.00
0.00
0.00
.13
0.00
0.00
100.50
WATER-C02-FREE
74.07
.35
11.64
2.67
1.79
.15.23
1.08
4.51
3.50
0.00
(100.0)
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
ATOMS
WEIGHT
34.24
.21
6.10
1.85
1.38
.12
.14
.76
3.31
2.87
0.00
.01
.01
0.00
0.00
ATOMS
NUMBERS (100.0)
25.66
.09
4.75
.70
.52
.04
.12.40
3.03
1.55
0.00
0
CBOR
ABAN
NE
LCAC
NS
DlWO
HYOL
MTHM
ILTI
RU
APCC
MGO/MGO+FEO
IN FEMICS =
HEIGHT NORM
(100.0)
32.20
0.00
20.73
38.25
1.14
0.00
0.00
0.00
0.00
2.72
.41
0.00
0.00
3.88
0.00
.67
0.00
0.00
0.00
0.00
.49-
NON-OX IDATIUN NORM
(FE203 CONVERTED TO FEO)
29.53
0.00
20.83
38.44
1.15
0.00
0.00
0.00
0.00
3.75
0.00
5.62
0.00
0.00
0.00
.680.00
0.00
0.00
0.00
.10
SIAL
FM
CALK
KMG
TIP
C/FM
at
397
36.8
21.4
6.2
35.5
.34
.09
1.4
0.00
.29
155
3-COMPONENT
WT.PERCENTS
F 35.11
M 1.83
A 63.06
F 32.91
49.6138.49
11.90
1309
ANDESITE (OVERLYING 1310)
12.54N 39.01E. EMNI NEGARIT PASS,
E. ABBATE ET AL.? 1969
5102
TIO2
AL203
FE203
FEO
MNOMGO
CAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
0CB
ORAB
ANNE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MQO/MGOFEO
IN FEMICS =
ORIGINAL
ANALYSIS
52.59
3.03
13.60
2.53
9.37
.18
4.25
7.85
3.75
.66.38
1.10
0.00
0.00
0.00
0.00
0.00
0.00
0.00
99.49
WEIGHT NORM
(100.0)
5.08
0.00
3.97
32.32
19.14
0.00
0.00
0.00
0.00
15.10
0.00
13.96
0.00
3.74
0.00
5.84
0.00
0.00
.84
0.00
.57
WATER-C02-FREE
(100.0)
53.45
3.08
14.03
2.57
9.52
.18
4.32
7.98
3.81
.67.39
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
2.38
0.00
3.99
32.48
19.24
0.00
0.00
0.00
0.00
15.40
0.00
19.79
0.00
0.00
0.00
5.87
0.00
0.00
.85
0.00
.46
SITl
ALFE3
FE2
MNMG
CA
NAK
P
H*H-
Cs
0
ATOMS
WEIGHT
24.57
1.82
7.30
1.77
7.28
.14
2.56
5.61
2.78
.55.17
.01
0.00
0.00
0.00
44.93
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
ATOMS
NUMBERS
19.55.85
6.05
.71
2.92
.06
2.36
3.13
2.70
.31.12
61.25
142
22.0
44.1
22.8
11.0
.10.39
6.2.44
.52
-2
(100.0)
3-COMPONENTWT,
FM
A
FC
A
NK
C
D.I.
.PERCENTS
57.88
20.67
21.45
49.25
32.49
18.25
30.59
5.38
64.03
73.68
No. 1309
REMARKS: Analysis made on powder dried at 110?C.
MINERALOGY: Weakly porphyritic. Phenocrysts:
Zoned An45 (center) - An60 (rim), augite (2 V = +50?),
hypersthene (En68). Groundmass: Hyalopilitic struc-
ture with sparse microlites of An64-67, rare pyroxene,
common magnetite.
No. 1310
REMARKS: See under 1309.
MINERALOGY: Weakly porphyritic. Phenocrysts:
Zoned An58 (center) - An62 (rim), augite (2V = +50?).
Groundmass: Interstitial An62 microlites, augite,
skeletal magnetite, rare ilmenite, brown glass; some
euhedral serpentinised Fa20.
No. 1311
REMARKS: SiO, determined to three significant
figures. Sample dried at 105"C prior to analysis.
P O5 less than 0.05%. Published summation is 99.90%.
MINERALOGY: Aphyric glass.
1310
PORPHYRITIC BASALT (UNDERLYING 1309)
12.54N 39.01E< EMM NEGARIT PASSi TIGRAYE. ABBATE ET AL.i 1969
SIO2TI02
AL203FE203
FEO
MNOMGO
CAONA20
K20P205
H20*H20-
C02S03
TOTAL
ORIGINALANALYSIS
49.951.56
12.813.70
7.4*
.179.15
10.452.34
.25.22
1.450.00
0.000.00
0.000.00
0.000.00
99.49
WATER-C02-FREE
50.951.59
13.073.77
7.59
.179.33
10.662.39
.25.22
(100.0)
SITI
ALFE3
FE2
MNMG
CANA
KP
H*H-
Cs
0
ATOMSWEIGHT
23.34? 94
6.782.59
5.78
.135.52
7.471.74
.21.10
.020.00
0.000.00
44.89
ATOMSNUMBERS (100.0)
18.59.44
5.621.04
2.32
.055.08
4.171.69
.12.07
60.81
0CB
ORA6
ANNE
LCAC
NS
DIMO
HY
OLMT
HMIL
TI
RUAP
CCMGO/MGO*FEO
IN FEMICS =
WEIGHT NORM(100.0)
1.790.00
1.5120.23
24.160.00
0.000.00
0.00
22.100.00
21.21
0.005.48
0.003.02
0.00
0.00.49
0.00
.78
NON-OXIDATION NORM(FE2O3 CONVERTED TO FEO)
0.000.00
1.5220.38
24.340.00
0.000.00
0.00
22.710.00
21.51
6.010.00
0.003.04
0.00
0.00.49
0.00
.64
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FMQZ
11317.1
51.925.5
5.5.07
.602.7
.21
.49-9
3-COMPONENTWT.PERCENTS
FM
A
FC
A
N
KC
O.I.
48.6939,99
11.32
46.0743.22
10.71
17.94
1.92
80.14
54.90
APHYRIC PANTELLERITIC OBSIDIAN
7.12N 38.30E, CHABBI EAST CENTRE.
R. MACDONALD AND I.L. GIBSON. 1970
5102
TI02
AL2O3
FE2O3FEO
MNOMGO
CAO
NA20
K20
P2O5
H20*
H20-
C02503
TOTAL
ORIGINAL
ANALYSIS
74.40
.35
9.42
1.77
2.88
.22.16
.20
5.33
4.29
0.00
.47
0.00
0.00
0.00
.25
.16.25
-.15
100.00
WATER
75.14
.35
9.51
1.79
2.91
.22.16
.20
5.38
4.33
0.00
-C02-FREE
(100.0)
SITI
ALFE3
FE2MN
MGCA
NA
KP
H*H-
Cs
0
ATOMS
WEIGHT
34.76
.214.98
1.24
2.24
.17.10
.14
3.95
3.56
0.00
.01
0.00
0.00
0.00
48.13
ATOMS
NUMBERS (100.0)
26,09
.09
3.89
.47
.65.07
.08.08
3.63
1.92
0.00
62.84
0CB
OR
ABAN
NE
LC
ACNS
01WO
HV
OLMT
HMIL
TIRU
APCC
MGO/MGO*FEO
IN FEMICS =
WEIGHT NORM
(100.0)
34.19
0.00
25.68
24.77
0.00
0.00
0.00
5.19
3.49
.89
0.00
5.12
0.00
0.00
0.00
.67
0.00
0.00
0.00
0.00
? 09
NON-OX1 DAT ION NORM(FE203 CONVERTED TO FEO)
35.120.00
25.77
24.86
0.000.00
0,00
0.004.88
.890.00
7.810.00
0.00
0.00.67
0.000.00
0.000.00
.06
NIGGLI
SIAL
FM
C
ALKK
MG
TIP
C/FMQZ
41631.1
23.4
1.2
44.3.35
.06
1.50.00
.05178
3-COMPONENTWT.PERCENTS
FM
A
FC
A
NK
C
D.I.
32.22
l.U66.67
32.14
1.3H
66.48
54.28
43.69
2.04
96.67
1312
APHYRIC PANTELLERITIC OBSIDIAN
7.14N 38.28E. CHABBI NORTHEAST CENTRE.
R. MACDONALD AND I.L. GIBSON, 1970
SI02
T102
AL2O3
FE2O3
FEOMNO
MGOCAO
NA20
PC 20
P205
H20+
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
74.40
.27
9.41
1.65
2.90
.21
? 13
.24
5.49
4.39
0.00
.41
0.00
0.00
0.00.25
.16.25
-.15
100.01
WATER-C02-FREE
(100.0)
75.08
.27
9.50
1.67
2.93
.21.13
.24
5.54
4.43
0.00
SITI
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
0
ATOMS
WEIGHT
34,76
.16
4.98
1.15
2.25
.16.08
.17
4.07
3.64
0.00
.00
0.00
0.00
0.00
48.06
ATOMS
NUMBERS (100.0)
26,07.07
3.89,44
.85.06
.07.09
3.73
1.96
0,00
62.77
Q
CB
ORAB
ANNE
LCAC
NSDI
MOHY
OL
MTHM
IL
TIRU
APCC
MGO/MGOtFEO
IN FEMICS =
WEIGHT NORM
(100.0)
34.05
0.00
26.26
24.14
0.00
0.00
0.00
4.83
4.05
1.06
0.00
5.10
0.00
0.00
0.00.52
0.00
0.00
0.00
0.00
.07
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
34.91
0.00
26.34
24.21
0.00
0.00
0.00
0.00
5.34
1.07
0.00
7.60
0.00
0.00
0.00
.52
0,00
0.00
0.00
0.00
.05
NIGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
OZ
413
30.8
22.51.4
45.2
.34.05
1.1
0.00
.06175
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
31.25
.89
67,86
31.02
1.64
67.35
54,25
43.38
2.37
97.22
No. 1312
REMARKS: See under 1311. SiO2 quoted as "by
difference" (this would seem to apply more appropriately
to 1311 with its 100.00 summation and its identical SiO_
content).
MINERALOGY: Same as 1311.
No. 1313
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1314
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
1313APHYRIC PANTELLERITIC OBSIDIAN
7.13N 38.28E. CHABBI HOT CONE, ARUSSIR. MACDONALD AND I.L. GIBSON, 1970
SI02TIO2
AL2O3FE2O3
FEOMNO
MGOCAO
NA2OK2O
P2O5
H20*H2O-
CO2
SO3
TOTAL
ORIGINALANALYSIS
74.20.27
9.401.74
2.90.21
.15? 21
$.234.26
0.00
.400.00
0.00
0.00? 24
.16.25
-.1499.48
WATER-C02-FREE(100.0)
75.28.27
9.541.77
2.94.21
.15.21
5.314.32
0.00
SITI
ALFE3
FE2MN
MGCA
NAK
P
H?H-
Cs
0
ATOMSWEIGHT
34,67.16
4.971.22
2.25.16
.09.15
3.883.54
0.00
.000.00
0.00
0.00
47.87
ATOMSNUMBERS (100.0)
26.14.07
3.90.46
.86.06
.08.08
3.57
1.92
0.00
62.86
0
CBOR
ABAN
NE
LC
AC
NS01
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGOFEO
IN FEMICS ?
WEIGHT NORM
(100.0)
34.29
0.00
25.61
24.95
0.00
0.00
0.00
5.12
3.32.94
0.00
5.25
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.09
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
35.21
0.00
25,70
25.03
0.00
0.00
0.00
0.00
4.69.94
0.00
7,90
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.06
NIGGLI
SI
ALFM
CALK
K
MG
TIP
C/FM
OZ
418
31.323.4
1.3
44.1
.35
.05
1.1
0.00.05
180
3-C0MP0NENT
WT.PERCENTS
F
MA
FC
A
NK
C
D.I.
32.49
1.0566.46
32.361.46
66.18
53,9243.92
2.16
96.87
1314APHYRIC PANTEU.ERITIC OBSIDIAN
7.12N 38.27E* CHABBI HOT CONEi ARUSSIR. MACDONALD AND I.L. GIBSON, 1970
SI02
TI02AL2O3
FE2O3FEO
MNO
MGOCAO
NA20K20
P205H20*
H20-
C02503
TOTAL
ORIGINALANALYSIS
74.30
? 269.35
1.283.34
.22
.20.20
5.664,44
0.00.32
0.00
0.000.00
.25.17
.25-.15
100.09
WATER-C02-FREE(100.0)
74.86
.269.42
1.293.37
.22
.20.20
5,704,47
0.00
SI
TI
AL
FE3FE2
MN
MGCA
NAK
PH*
H-
CS
0
ATOMSWEIGHT
34.71
.164.95
.902.60
.17
.12.14
4.203.69
0.00.00
0.00
0.000.00
47.94
ATOMSNUMBERS (100.0)
26.01
.073.86
.34.98
.07
.10.08
3.841.98
0,00
62,67
0
CBOR
AB
ANNE
LCAC
NSDI
WO
HY
OL
MTHM
IL
TIRU
APCC
MGO/MGO'FEO
IN FEMICS ?
WEIGHT NORM(100.0)
33.84
0.0026.51
23.51
0.000.00
0.003.74
4.80.88
0.00
6.210.00
0.000.00
,50
0,000,00
0.000.00
.10
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
34.51
0.0026.58
23.56
0.000,00
0.000.00
5.80.89
0.00
8.150.00
0.000.00
.50
0.000.00
0.000.00
.08
NIGGLI
SI
ALFM
C
ALKK
MGTI
PC/FM
QZ
405
30.123.2
1.2
45.5.34
.071.1
0.00.05
169
3-COMPONENTWT.PERCENTS
F 30.97
M 1.34A 67.69
F 30.97C 1.34
A 67.69
N 54,95K 43.11
C 1.94
1315
APHYRIC PANTELLERITIC OBSIDIAN
7.12N 36.27E. CHABB1 MAIN CENTRE,
R. MACDONALD AND I.L. GIBSON. 1970
SI02
TIO2
M.2O3
FE203FEO
MNOMGO
CAO
NA2O
K2O
P2O5
H2O*
H2O-C02
SO3
TOTAL
ORIGINAL
ANALYSIS
74.30
.27
9.44
1.61
2.82
.21
.12
.28
5.29
4.39
0.00
.36
0.00
0.00
0.00
.23
.16
? 25
-.14
99.59
WATER-C02-FREE
(100.0)
75.26
.27
9.56
1.63
2.86
.21.12
.28
5.36
4.45
0.00
SITI
M.FE3
FE2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
34.71
.16
4,99
1.13
2.19
.16.07
.20
3.92
3.64
0.00
.00
0.00
0.00
0.00
47.89
ATOMS
NUMBERS (100.0)
26.12
.07
3.91
.43
.83
,06
.06
.113.61
1.97
0.00
62.83
Q
CBOR
ABAN
NE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CC
MGO/MGO*FE0
IN FEMICS =
WEIGHT NORM
(100.0)
34.26
0.00
26.35
24.38
0.00
0.00
0.00
4.73
3.66
1.25
0.00
4.85
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.07
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
35.11
0.00
26.44
24.46
0.00
0.00
0.00
0.00
4.92
1.25
0.00
7.30
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.05
SI
AL
FMc
ALK
K
MG
TI
P
C/FM
QZ
418
31.4
22.2
1.7
44.8
.35
.05
1.1
0.00
.08
179
3-COMPONENT
WT.PERCENTS
F 31.13
30,791.95
67.27
53.11
44.082.81
No. 1315
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1316
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1317
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
1316
APHYRIC PANTELLERITIC OBSIDIAN
7.12N 38.27E. CHABBI HOT CONEi ARUSSI
R. MACDONALD AND I.L. GIBSON, 1970
SI02
TI02
AL2O3
FEZ03FEO
MNOMGO
CAO
NA20
K2O
P2O5
H2O*
H2O-
CO2503
TOTAL
ORIGINAL
ANALY5IS
74.30
.27
9.48
1.79
2.90
.20
? 16.18
5.52
4.48
0.00
.31
0.00
0.00
0.00
.23
.16.25
-.14
100.09
WATER-C02-FREE
74.84.27
9.55
1.80
2.92
.20.16
.18
5,56
4.51
0.00
(100.0)
SITI
ALFE3
FE2
MNMG
CANA
KP
H*H-
CS
0
ATOMS
WEIGHT
34,71
.16
5.02
1.25
2.25
.15.10
.13
4,10
3.72
0.00
.00
0.00
0.00
0.00
48.00
ATOMS
NUMBERS (100.0)
26.00
.07
3.91
.47.B5
.06,08
,07
3.75
2.00
0.00
62.73
0CB
ORAB
ANNE
LCAC
NS01
WOHY
OLMT
HMIL
TIRU
AP
CC
MGO/MGO*FEO
IN FEMICS -
WEIGHT NORM
(100.0)
33.45
0.00
26.74
23.95
0.00
0.00
0.00
5.23
4.02
.80
0.00
5.29
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.09
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
34.39
0.00
26.84
24.03
0.00
0.00
0.00
0.00
5.42
.80
0.00
8.00
0,00
0.00
0.00
.52
0.00
0,00
0.00
0.00
.06
NlGGLI
SI
AL
FM
C
ALK
K
C/FM
OZ
408
30.7
23.0
1.1
45.2
.35
.06
1.1
0.00
.05
171
3.COMPONENT
WT.PERCENTS
F 31.58
M 1.08
A 67.34
D.I.
31.54
1.21
67.25
54.22
44.01
1.77
1317
APHYRIC PANTELLERITIC OBSIDIAN
7.13N 38.31E, CHABBI EAST CENTRE,
R. MACDONALD AND I.L. GIBSON. 1970
SI02
TI02
AL2O3
FE203
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02S03
TOTAL
ORIGINAL
ANALYSIS
73.80.26
9.54
1.73
2.97
.23.19
.23
5.62
4.43
0.00
.49
0.00
0.00
0.00.25
.17.25
-.15
100.01
WATER-C02-FREE
(100.0)
74.55.26
9.64
1.75
3.00
.23.19
.23
5.68
4.47
0,00
SITI
ALFE3
FE2MN
MGCA
NA
KP
H*H-
Cs
0
ATOMS
WEIGHT
34.48.16
5.05
1.21
2.31
.18.11
.16
4.17
3.68
0.00.01
0.00
0.00
0.00
47.98
ATOMS
NUMBERS (100.0)
25.91.07
3.95
.46,87
,07.10
.09
3.83
1.99
0.00
62.68
0CB
ORAB
ANNE
LC
ACNS
DIWO
HYOL
MT
HMIL
TIRU
APCC
MGO/MGOtFEO
IN FEMICS e
WEIGHT NORM
(100.0)
32.68
0.00
26.52
24.61
0.00
0.00
0.00
5.07
4.14
1.02
0.00
5.47
0.00
0,00
0,00,50
0.00
0,00
0,00
0.00
.10
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
33.58
0.00
26.61
24.69
0.00
0.00
0.00
0.00
5.50
1.02
0.00
8.09
0.00
0.00
0.00.50
0.00
0.00
0.00
0.00
.07
NlGGLI
SIAL
FMC
ALKK
MGTI
P
C/FM
QZ
400
30.5
23.2
1.3
45.0.34
.07
1.10.00
.06163
3-COMPONENT
WT.PERCENTS
FM
A
FC
A
NK
C
D.I.
31.46
1.27
67.27
31.38
1.54
67.09
54.67
43.09
2.24
96.11
1318
APHYRIC PANTELLERITIC OBSIDIAN
7.15N 38.28E. CHABBI NORTH CENTRE.
R. MACOONALD AND I.L. GIBSON, 1970
SI02
TI02
AL203
FE2O3
FEOMNO
MGOCAO
NA20
K20
P2O5
H20*
H20-
C02
S03
TOTAL
ORIGINAL
ANALYSIS
74,00
.27
9.46
1.91
2.65
.21
.23
.25
5.42
4.41
0.00
.30
0.00
0.00
0.00
.25
.16
.25
-.15
99.62
WATER-C02-FREE
74.89
.27
9.57
1.93
2.68
.21
.23
.25
5.49
4.46
0.00
(100.0)
SITI
ALFES
FE2MN
MGCA
NAK
PH*
H-C
s
0
ATOMS
WEIGHT
34.57
.16
5.01
1.34
2.06
.16.14
.18
4.02
3.66
0.00
.00
0.00
0.00
0.00
47,81
ATOMS
NUMBERS (100.0)
26.01
.07
3.92
.51
.78
.06
.12
.09
3.70
1.98
0.00
62.77
0
CBOR
AB
AN
NE
LCAC
NSDI
WO
HY
OL
MT
HM
ILTI
RUAP
CC
MGO/MG0*FE0
IN FEMICS *
WEIGHT NORM
(100.0)
33.40
0.00
26.45
24.35
0.00
0.00
0.00
5.61
3.68
1.10
0.00
4.B9
0.00
0.00
0.00
? 52
0.00
0.00
0.00
0.00
.14
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
34.40
0.00
26,55
24.44
0.00
0.00
0.00
0.00
5.18
1,11
0.00
7.79
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.09
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
408
30.8
23.1
1.5
44.6
.35
.08
1.1
0,00
.06
171
3-COMPONENT
WT.PERCENTS
F 31.19
M 1.57
A 67.24
31.15
1.71
67.14
53.77
43.75
2.48
No. 1318
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1319
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1320
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
1319APHYRIC PANTELLERITIC OBSIDIAN
7.UN 38.29E. CHA8B1 MAIN CENTRE.R, MACDONALD AND I.L. GIBSON. 1970
SI02TI02
AL2O3FE2O3
FEOMNO
MGOCAO
NA20K20
P205H20*
H20-C02
S03
TOTAL
ORIGINALANALYSIS
74.10.29
9.621.76
2.84.22
.20.20
5.534.37
0.00.29
0.000.00
0.00.25
.16.24
-.1599.92
WATER-C02-FREE
74.75.29
9.701.78
2.86.22
.20.20
5.584.41
0.00
(100.0) SI
Tl
ALFE3
FE2MN
MGCA
NAK
PH*
H-C
S
0
ATOMSWEIGHT
34.62.17
5.091.23
2.21.17
.12.14
4.103.63
0.00.00
0.000.00
0.00
47.93
ATOMSNUMBERS (100.0)
25.96.08
3.97.46
.83.07
.10.08
3.761.95
0.00
62.74
0CB
ORAB
ANNE
LC
ACNS
DIWO
HYOL
MT
HMIL
TIRU
APCC
MGO/MGO+FEOIN FEMICS ?
WEIGHT NORM(100.0)
32.950.00
26.1325.33
0.000.00
0.00
5.153.76
.880.00
5.240.00
0.00
0.00.56
0.00
0.000.00
0.00
.11
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
33.870.00
26.2225.42
0.000.00
0.00
0.005.14
.890.00
7.910.00
0.00
0.00.56
0.00
0.000.00
0.00
.08
NIGGLI
SIAL
FMC
ALKK
MG
TIP
C/FMOZ
406
31.123.0
1.244.8
.34.07
1.20.00
.05168
3-COMPONENTWT.PERCENTS
FM
A
FC
A
N
KC
O.I.
31.291.36
67.35
31.291.36
67.35
54.75
43.271.98
95.83
1320
APHYRIC PANTELLERITIC OBSIDIAN
7.UN 38.29E. CHABB1 EAST CENTRE,R. MACDONALD AND I.L. GIBSON. 1970
SI02TI02
AL203FE2O3
FEOMNO
MGO
CAONA20
K20P205
H20*H20-
C02S03
TOTAL
ORIGINALANALYSIS
74.90.27
9.461.53
2.87.22
.17
.205.49
4.470.00
.400.00
0.000.00
.25
.16? 24
-.15100.48
WATER-C02-FREE
75,22.27
9.501.54
2.88.22
.17
.205.51
4.490.00
(100.0) SI
TIAL
FE3
FE2MN
MG
CANA
KP
H +H-
Cs
0
ATOMS
WEIGHT
34,99
.16
5.01
1.07
2.23
.17.10
.14
4.07
3.71
0.00
.00
0.00
0.00
0.00
48.31
ATOMS
NUMBERS (100.0)
26.10
.07
3.89
.40
,84.07
.09
,07
3,71
1.99
0.00
62.77
0
CBOR
AB
ANNE
LCAC
NSDI
WOHY
OLMT
HMIL
TIRU
APCC
MGO/MGO+FEO
IN FEMICS ?
WEIGHT NORM
(100.0)
34.32
0.00
26.60
23.83
0.00
0.00
0.00
4.46
4.16
.88
0.00
5.23
0.00
0.00
0.00
.51
0.00
0.00
0.00
0.00
.10
NON-OXIDATION NORM
(FE203 CONVERTED TO FEO)
35.12
0.00
26.68
23.90
0.00
0.00
0.00
0.00
5.36
.89
0.00
7.54
0.00
0.00
0.00
.52
0.00
0.00
0.00
0.00
.07
NIGGLI
SI
ALFM
C
ALKK
MGTI
P
C/FM
OZ
416
31.0
22.21.2
45.6.35
.061.1
0.00
.05177
3-COMPONENT
WT.PERCENTS
F
MA
FC
A
NK
C
D.I.
30.28
1.17
68.55
30,22
1.37
68.41
54,04
44.00
1.97
96.28
1321APHYRIC PANTELLERITIC OBSIDIAN
7.UN 38.31E. CHABBI EAST CENTRE.R. MACDONALD AND I.L. GIBSON. 1970
SI02
TI02
AL2O3FE2O3
FEOMNO
MGOCAO
NA20K20
P2O5H20*
H20-C02
S03
ORIGINALANALYSIS
74.80
.289.69
1.612.92
.22.14
.305.53
4.380.00
.370.00
0.000.00
.24
.16.25
-.14
100.75
WATER-C02-FREE(100.0)
74.90
.289,70
1.612.92
.22.14
? 305.54
4.390.00
SI
TIAL
FE3FE2
MN
MGCA
ATOMSWEIGHT
34.95
.175.13
1.132.27
.17.08
.214.10
3.640.00
.000.00
0.000.00
48.39
ATOMS
NUMBERS (100.0)26.00
.073.97
.42.85
.06.07
.113.73
1.940.00
0CB
OR
ABAN
NE
LCAC
NSDI
WOHY
OLMT
HM
ILTI
RUAP
CCMG0/MG0*FEO
IN FEMICS *
WEIGHT NORM(100.0)
33.270.00
25.99
25.450.00
0.00
0.004.68
3.771.32
0.004.98
0.00
0.00O.OO
.530.00
0.000.00
0.00
.08
NON-OXIDATION NORM(FE203 CONVERTED TO FEO)
34.U
0.0026.07
25.530.00
0.00
0.00
0.005.03
1.33
0.007.41
0.000.00
0.00
.530.00
0.000.00
0.00
.06
SI
AL
FM
c
ALKK
C/FM
OZ
40931.3
22.2
1.844.7
.34.05
1.20.00
.08171
3-COMPONENTWT.PERCENTS
F 31.07M .96
A 67,97
30.732.04
67.23
54.16
42.902.94
No. 1321
REMARKS: See under 1311.
MINERALOGY: Same as 1311.
No. 1322
MINERALOGY: Fine-grained rock. Phenocrysts:
Occasional clusters of large, oscillatory-zoned labra-
dorite laths intergrown with colourless augite;
numerous microphenocrysts of serpentinised olivine.
Groundmass: Fresh labradorite (sometimes zoned
to oligoclase), intergranular colourless augite and
iron-ore, interstitial pale-brown glassy mesostasis.
OTHER INFORMATION: 1-1/2 - 2 m wide dyke cutting
alkali olivine basalt lavas of the early Miocene Simien
center.
1322
OLIVINE THOLEIITE DYKE
13.UN 38.21E. DEJEN COL. 5IMIEN.
M.J. LEBAS AND P.A. MOHR. 1970
SI02
TI02
AL2O3
FE2O3
FEO
MNO
MGO
CAO
NA20
K20
P2O5
H20*
H20-
C02
S03
ORIGINAL
ANALYSIS
50.38
1.71
14.92
1.91
9.63
.16
5.34
10.65
2.81
.53
.17
1.17
.56
.13
0.00
0.00
0.00
0.00
0.00
100.07
WATER-C02-FREE
51.30
1.74
15.19
1.94
9.81
.165.44
10.84
2.86
.54
.17
(100.0)
SITI
AL
FE3
FE2
MN
MG
CA
NA
K
P
H*
H-
C
S
ATOMS
WEIGHT
23.54
1.03
7.89
1.34
7.49
.12
3.22
7.61
2.08
.44
.07
.01
.01
.04
0.00
ATOMS
NUMBERS (100.0)
18.83
.48
6.57
.54
3.01
.05
2,98
4.27
2.04
.25
.05
45.18 60.93
0
CB
OR
AB
AN
NE
LC
AC
NS
DI
WO
HY
OL
MT
HM
IL
TI
RU
AP
CC
MGO/MGO+FEO
IN FEMJCS *
WEIGHT NORM
(100.0)
.98
0.00
3.19
24.23
26.95
0.00
0.00
0.00
0.00
20.73
0.00
17.12
0.00
2.82
0.00
3.30
0.00
0.00
.38
.30
.56
NON-OXIDATION NORM
(FE2O3 CONVERTED TO FEO)
0.00
0.00
3.20
24.32
27.05
0.00
0.00
0.00
0.00
21.01
0.00
17.34
3.09
0.00
0.00
3.31
0.00
0.00
.38
.30
.49
NIGGLI
SI
AL
FM
C
ALK
K
MG
TI
P
C/FM
OZ
123
21.5
43.1
27.9
7.5
.11
.4$
3.1
.16
.65
-7
3-COMPONENT
WT.PERCENTS
F
M
A
F
C
A
N
K
C
D.I.
57.07
26.41
16,52
45.20
41.72
13.08
20.09
3.79
76.13
68.36
* U. S. GOVERNMENT PRINTING OFFICE : 1970 O - 397-772