| | Book | 523.5'1'0981 ISBN 0-8263-0543-1 2. Meteorites—Brazil. II. Title. 80-5333 © 1980 by the University of...composition of stone meteorites. How to recognize a meteorite. Brazilian stone meteorites. 7.1. ACHONDRITES...Augite-olivine achondrite . Governador Valadares. 7.1.3. Monomict pigeonite-plagioclase achondrites . . . Ibitira...Uberaba. 7.2.2. L-group chondrites . Mafra. Minas Gerais. Parana i ba. Patrimonio. Putinga. Rio Negro...chondrite . Parambu. Acknowledgments . References.^.. Meteorite index. Page 1 3 11 29 35 45 47 48 48 48 61 61 | | | Journal (article/letter/editorial) | crystals is mesostasis, composed principally of plagioclase and/or glass, with euhedra of titanomagnetite...order: MIL03346, NWA817, Y000593, Nakhla ¼ Governador Valadares, Lafayette, and NWA998. Chemical, isotopic...circumstances are clear for only three. Nakhla, the meteorite eponym for the group, was observed to fall in...Antarctica, but far from the Yamato samples (Antarctic Meteorite Newsletter, 2004). The histories of the other...nakhlites are clouded. Lafayette was recognized as a meteorite in 1931 in the Purdue University geology department | | McCubbin, Francis M., Elardo, Stephen M., Shearer, Charles K., Smirnov, Alexander, Hauri, Erik H., Draper, David S. (2013) A petrogenetic model for the comagmatic origin of chassignites and nakhlites: Inferences from chlorine-rich minerals, petrology, and geochemistry. Meteoritics & Planetary Science, 48 (5) 819-853 doi:10.1111/maps.12095 | Journal (article/letter/editorial) | gain insight into the petrogenesis of these two meteorite classes. There are a striking number of geochemical...cumulate horizon that was sampled by the Chassigny meteorite. This model is supported by the textural and chemical...originally led to their classification as distinct meteorite subgroups (McSween and Treiman 1998). The two...phases, whereas the nakhlite clan (Nakhla, Governador Valadares, Lafayette, Miller Range [MIL] 03346 and...SNC (shergottite-nakhlite-chassignite) Martian meteorite clan, to which the petrologically distinct Allan | | | Journal (article/letter/editorial) | recent times. We provide new microprobe data for plagioclase, olivine, and pyroxene from 19 of the martian...composition and texture. The silicate data shows that plagioclase from each of the rock types shares similar trends...trends in Ca–Na–K, and that K2O/Na2O wt% of plagioclase multiplied by the Al content of the bulk rock...“depleted” in nature. Olivine data show that meteorite Y 980459 is a primitive melt from the martian...mineralogy context, plagioclase from Mars is richer in Na than terrestrial and lunar plagioclase. The two most |
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