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Studies of Brazilian meteorites. XIV - Mineralogy, petrology, and chemistry of the Conquista, Minas Gerais, chondriteThe Conquista chondrite is described and classified as an H4. The mineral composition is reported. H-group classification is based on described microscopic, electron microprobe, and bulk chemical studies. The evidence for petrologic type 4 classification includes the pronounced well-developed chondritic texture; the slight compositional variations in constituent phases; the high Ca contents of pyroxene and the presence of pigeonite; glassy to microcrystalline interstitial material rich in alkalis and SiO2; and twinned low-Ca clinopyroxene.
Document ID
19780063393
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Keil, K.
(New Mexico, University Albuquerque, N. Mex., United States)
Kirchner, E.
(New Mexico, University Albuquerque, N. Mex.; Salzburg, Universitat, Salzburg, Austria)
Gomes, C. B.
(New Mexico, University Albuquerque, N. Mex.; Sao Paulo, Universidade, Sao Paulo, Brazil)
Jarosewich, E.
(Smithsonian Institution, National Museum of Natural History, Washington D.C., United States)
Murta, R. L. L.
(Minas Gerais, Universidade Federal, Belo Horizonte, Brazil)
Date Acquired
August 9, 2013
Publication Date
June 30, 1978
Publication Information
Publication: Meteoritics
Volume: 13
Subject Category
Lunar And Planetary Exploration
Accession Number
78A47302
Funding Number(s)
CONTRACT_GRANT: NGL-32-004-064
Distribution Limits
Public
Copyright
Other

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