Composition of bulk samples and a possible pristine clast from Allan Hills A81005.

William V. Boynton, D. H. Hill

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Abundances of 35 elements were determined in two bulk samples and a white clast in the Allan Hills A81005 meteorite. High siderophile element content indicates that the sample is a regolith breccia. An Fe/Mn ratio of 77 in this meteorite eliminates parent bodies of known differentiated meteorites as the source of ALHA 81005. The incompatible elements are very similar to those found in most lunar highlands rocks, and provide very strong evidence that the sample is lunar in origin. The clast sample has the trace-element pattern of a lunar anorthosite and is very low in KREEP and siderophile elements. It may be a fragment of a pristine lunar rock. (Authors' abstract)-C.N.

Original languageEnglish (US)
Pages (from-to)837-840
Number of pages4
JournalGeophysical Research Letters
Volume10
Issue number9
StatePublished - 1983

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Allan Hills meteorite
siderophile element
clast
meteorite
siderophile elements
parent body
anorthosite
meteorites
regolith
breccia
rock
meteorite parent bodies
lunar rocks
trace element
highlands
trace elements
fragments
rocks

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Composition of bulk samples and a possible pristine clast from Allan Hills A81005. / Boynton, William V.; Hill, D. H.

In: Geophysical Research Letters, Vol. 10, No. 9, 1983, p. 837-840.

Research output: Contribution to journalArticle

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AB - Abundances of 35 elements were determined in two bulk samples and a white clast in the Allan Hills A81005 meteorite. High siderophile element content indicates that the sample is a regolith breccia. An Fe/Mn ratio of 77 in this meteorite eliminates parent bodies of known differentiated meteorites as the source of ALHA 81005. The incompatible elements are very similar to those found in most lunar highlands rocks, and provide very strong evidence that the sample is lunar in origin. The clast sample has the trace-element pattern of a lunar anorthosite and is very low in KREEP and siderophile elements. It may be a fragment of a pristine lunar rock. (Authors' abstract)-C.N.

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