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

William V. Boynton, Dolores H. Hill

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Abundances of thirty‐five 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.

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

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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