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Trace Element Distribution Between Olivine and Kirschsteinite in Angra Dos ReisThe angrites are a small and enigmatic group of basaltic achondrites that possess unique mineralogical and chemical properties. The dominant mineralogy of the seven angrite members (Angra dos Reis, LEW 86010, LEW 87051, Asuka 881371, Sahara 99555, D Orbigny, and a new Moroccan member) is fassaite, olivine, and plagioclase. Angrites display a wide range of thermal histories, with Angra dos Reis (AdoR) exhibiting a cooling history different from that of the rapidly cooled members and from LEW86010, a more slowly cooled member. AdoR could represent either a cumulate or a porphyritic igneous rock that was later altered by metamorphism. We are re-examining the thermal history of AdoR in light of the more recently described angrite members. Our emphasis is a trace element study of low-Ca olivine, which we refer to as olivine, and high-Ca olivine, which we refer to as kirschsteinite, in AdoR.
Document ID
20030111057
Document Type
Conference Paper
Authors
Fittipaldo, M. M. (New Mexico Univ. Albuquerque, NM, United States)
Jones, R. H. (New Mexico Univ. Albuquerque, NM, United States)
Shearer, C. K. (New Mexico Univ. Albuquerque, NM, United States)
Date Acquired
August 21, 2013
Publication Date
March 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-9463
Distribution Limits
Public
Copyright
Public Use Permitted.

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IDRelationTitle20030110578Analytic PrimaryLunar and Planetary Science XXXIV
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