The lunar nearside highlands - Evidence of resurfacing

dc.contributor.authorAndre, Constance G.
dc.contributor.authorStrain, Priscilla L.
dc.date.accessioned2007-10-11T19:25:00Z
dc.date.available2007-10-11T19:25:00Z
dc.date.issued1983
dc.description.abstractComparative frequency distributions of aluminum, magnesium, titanium, iron, and thorium concentrations from orbital geochemical data show a chemical dichotomy between the lunar nearside and farside terra surfaces. Nearside terra rock types (indicated by modes in the histograms) are more mafic and less aluminous than those on the farside. To explore this chemical asymmetry, terra regions exhibiting either anomalously high or low Mg/Al concentration ratios were examined. Low Mg/Al material excavated from depth by basin and large crater impacts indicates that the highly 'anorthositic' farside crustal composition is also present in the subsurface of the near side at widely scattered locations. Study of high Mg/Al areas of the nearside terra suggests resurfacing of the preexisting terra, possibly by impact excavation of local mafic 'pockets' in the crust or early extrusion of volcanic materials.
dc.format.extent28215717 bytes
dc.format.extentA544–A552
dc.format.mimetypeapplication/pdf
dc.identifier0148-0227
dc.identifier.citationAndre, Constance G. and Strain, Priscilla L. 1983. "<a href="https://repository.si.edu/handle/10088/2653">The lunar nearside highlands - Evidence of resurfacing</a>." <em>Journal of Geophysical Research</em>, 88 A544–A552.
dc.identifier.issn0148-0227
dc.identifier.urihttp://hdl.handle.net/10088/2653
dc.language.isoen
dc.relation.ispartofJournal of Geophysical Research 88
dc.titleThe lunar nearside highlands - Evidence of resurfacing
dc.typearticle
sro.description.unitNASM
sro.description.unitNASM-CEPS
sro.identifier.itemID71524
sro.identifier.refworksID2697
sro.identifier.urlhttps://repository.si.edu/handle/10088/2653

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