dc.contributor.author |
Mason, Brian |
en |
dc.contributor.author |
Taylor, S. R. |
en |
dc.date.accessioned |
2006-11-15T20:23:18Z |
en_US |
dc.date.accessioned |
2011-03-21T19:45:04Z |
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dc.date.available |
2006-11-15T20:23:18Z |
en_US |
dc.date.available |
2011-03-21T19:45:04Z |
|
dc.date.issued |
1982 |
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dc.identifier.citation |
Mason, Brian and Taylor, S. R. 1982. "<a href="https://repository.si.edu/handle/10088/815">Inclusions in the Allende Meteorite</a>." <em>Smithsonian Contributions to the Earth Sciences</em>, (25) 1–30. <a href="https://doi.org/10.5479/si.00810274.25.1">https://doi.org/10.5479/si.00810274.25.1</a>. |
en |
dc.identifier.issn |
0081-0274 |
|
dc.identifier.uri |
http://dx.doi.org/10.5479/si.00810274.25.1 |
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dc.description.abstract |
Six discrete groups of inclusions have been distinguished in the Allende meteorite. Groups I, V, and VI are mostly melilite-rich chondrules, although some have been extensively altered to fine-grained aggregates; Groups II and III are mostly fine-grained aggregates made up largely of spinel and fassaite; Group IV are olivine-rich aggregates and chondrules. Each group has a distinctive trace-element pattern, most clearly shown by the rare-earth (RE) distribution pattern. Group I has an unfractionated pattern (except for a small positive Eu anomaly) at about 10-15 times chondrites; Group II has a highly fractionated pattern with depletion of the heavier lanthanides (Gd-Er) and negative Eu and positive Tm and Yb anomalies; Group III has an unfractionated pattern at about 20 times chondrites, except for negative Eu and Yb anomalies; Group IV has a relatively unfractionated pattern at 2-4 times chondrites; Group V has an unfractionated pattern at 10-20 times chondrites; Group VI has an unfractionated pattern at 10-20 times chondrites, except for positive Eu and Yb anomalies (i.e., complementary to Group III). The complex patterns of trace element distribution in these Allende inclusions indicate a complex history of formation of this meteorite from the solar nebula. |
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dc.format.extent |
9167330 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en_US |
en_US |
dc.relation.ispartof |
Smithsonian Contributions to the Earth Sciences |
en |
dc.title |
Inclusions in the Allende Meteorite |
en |
dc.type |
Journal Article |
en |
dc.identifier.srbnumber |
113523 |
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dc.identifier.doi |
10.5479/si.00810274.25.1 |
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rft.jtitle |
Smithsonian Contributions to the Earth Sciences |
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rft.issue |
25 |
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rft.spage |
1 |
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rft.epage |
30 |
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dc.description.SIUnit |
nmnh |
en |
dc.description.SIUnit |
nh-mineral sciences |
en |
dc.citation.spage |
1 |
|
dc.citation.epage |
30 |
|