Siderophile, lithophile and mobile trace elements in the lunar meteorite Allan Hills 81005

Details Siderophile, lithophile and mobile trace elements in the lunar meteorite Allan Hills 81005 Siderophile, lithophile and mobile trace elements in the lunar meteorite Allan Hills 81005

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..821v&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, Sept. 1983, p. 821-824.

Physics

9

Lunar Rocks, Meteoritic Composition, Trace Elements, Abundance, Antarctic Regions, Mars Surface, Meteorites, Antarctic Meteorites, Allan Hills Meteorites, Alha81005, Moon, Origin, Description, Physical Properties, Characteristics, Mars, Source, Samples, Meteorite, Siderophiles, Lithophiles, Trace Elements, Neutron Activation Analysis, Rnaa, Comparisons, Lunar, Crust, Micrometeorites, Distribution, L Chondrites, Snc Meteorites, Procedure, Experiments

Scientific paper

Contents of siderophilic As, Au, Co, Ga and Sb, volatile/mobile Ag, Bi, Cd, In, Se, Te, Tl and Zn and lithophilic Cs, Rb and U determined by radiochemical neutron activation analysis in ALHA81005 are similar to those of lunar highlands samples returned by Apollo missions, indicating this meteorite's lunar origin. Five elements (Co, Ga and lithophiles) reflect lunar crustal processes while the remaining 11 siderophile and mobile elements indicate 1.4±0.5% micrometeorite admixture or enrichment by thermal redistribution on the moon. Thus, in contrast to L chondrites where severe shock caused trace element loss, impact-launching of ALHA81005 to earth was free of substantial shock loading. In this light, a Martian origin for severely shocked SNC meteorites is plausible.

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