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Petrologic study of the Belgica 7904 carbonaceous chondrite - Hydrous alteration, oxygen isotopes, and relationship to CM and CI chondritesThe genetic relationships between the petrology, hydration reactions, and isotopic oxygen composition in the Belgica 7904 (B7904) carbonaceous chondrite, and the relationship between B7904 and the CM and CI chondrites were investigated by characterizing seven components separated from B7904. The seven specimens included two partially altered chondrules, two phylosilicate clasts, two olivine fragments, and one matrix sample. The results of the analyses and thermodynamic calculations suggest that CI chondrites may have been produced in a two-stage alteration process from materials similar to that of the B7904 matrix, by reactions with liquid water in their parent body. The common CM chondrites may have undergone aqueous alteration in the parent body, in addition to hydration in the nebula, resulting in two-stage alterations; the parent body may have been different from that of B7904.
Document ID
19930040726
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ikeda, Y.
(Ibaraki Univ. Mito, Japan)
Prinz, M.
(American Museum of Natural History New York, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 57
Issue: 2
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
93A24723
Funding Number(s)
CONTRACT_GRANT: NAG9-32
Distribution Limits
Public
Copyright
Other

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