Reconsideration on stratigraphy of the nakhlite igneous body as inferred from their mineralogy and cooling rates
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- Mikouchi Takashi
- Graduate School of Science, University of Tokyo
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- Hoffmann Viktor
- Dept. of Geosciences, University of Tuebingen Dept.of Geo.-Env. Sciences, University of Munich
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- Miyamoto Masamichi
- Graduate School of Science, University of Tokyo
Bibliographic Information
- Other Title
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- ナクライト火星隕石の鉱物学的特徴と冷却速度の関係から推測される起源岩体の層状構造についての再考察
Description
Our mineralogical study on new nakhlite Martian meteorites (3 MIL09 Antarctic meteorites and NWA5790) showed that 3 MILs are paired with MIL03346, and NWA5790 has the largest mesostasis abundance among known nakhlites with extensive chemical zoning of augite and olivine. These results are consistent with the proposed model for the nakhlite igneous body (cumulus a crystals are loosely packed near the surface and become more closely packed with increasing depth). NWA5790 appears to have been located at the top most part of the cumulus pile, but the obtained cooling rate is indistinguishable from those of NWA817 and MIL (∼0.5 deg/hr).
Journal
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- Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
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Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2012 (0), 162-, 2012
Japan Association of Mineralogical Sciences
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Details 詳細情報について
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- CRID
- 1390001205546931200
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- NII Article ID
- 130005468200
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed
