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REE patterns versus the origin of the basaltic achondritesThe spectral uniqueness of asteroid 4 Vesta has led to suggestions that it is the eucrite parent body. However, there exist other basaltic achondrite types besides eucrites; either they also came from Vesta or else there exist other achondrite parent bodies. Howardites appear to be mixtures of eucrites and diogenites, and mesosiderites mixtures of eucrites or howardites and iron; thus one may infer that all four classes come from the same parent body. The REE patterns of eucrites and diogenites are modeled in order to test this hypothesis; eucrites can be made easily, but the patterns of diogenites are more difficult to match. The other basaltic achondrites are so rare that one cannot argue from statistics of abundances against a disrupted parent body for their origin. Pallasites and most irons likely had an origin separate from eucrites, again in parent bodies since disrupted.
Document ID
19800032654
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Consolmagno, G. J.
(Harvard-Smithsonian Center for Astrophysics Cambridge, Mass., United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1979
Subject Category
Lunar And Planetary Exploration
Accession Number
80A16824
Funding Number(s)
CONTRACT_GRANT: NGR-22-007-269
Distribution Limits
Public
Copyright
Other

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