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Some Al-, Ti-rich augites in Chassigny magmatic inclusions show reverse zoning from the Mg-poor core to the Mg-rich rim. This unique chemical zoning in Chassigny magmatic inclusion gives important implications for the crystallization of the magmatic inclusions. The crystallization stage of the Mg-poor core is different from that of the Mg-rich rim because the zoned augite has a sharp boundary between the Mg-rich and Mg-poor regions. The presence of such Al-, Ti-augite with reverse zoning implies that the bulk composition of the magmatic inclusion changed into Mg-rich. Such a compositional change of the magmatic inclusion can be produced by the melting of the surrounding olivine. There is a possibility that the melting of surrounding olivine has occurred during a shock event. In order to examine the possibility of the melting by a shock event, this study compared texture and constituent minerals of Chassigny magmatic inclusions with those of Nakhla magmatic inclusions. 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Comparative mineralogy of magmatic inclusions in olivine from the Chassigny and Nakhla martian meteorites
https://doi.org/10.15094/00006072
https://doi.org/10.15094/00006072fc63635c-0c7d-4e8c-9c47-c6e4f9183ae9
名前 / ファイル | ライセンス | アクション |
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KJ00002499478 (5.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2005-03-01 | |||||
タイトル | ||||||
タイトル | Comparative mineralogy of magmatic inclusions in olivine from the Chassigny and Nakhla martian meteorites | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | martian meteorites, Chassigny, Nakhla, magmatic inclusion, reverse zoning | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00006072 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
論文名よみ | ||||||
その他のタイトル | Comparative mineralogy of magmatic inclusions in olivine from the Chassigny and Nakhla martian meteorites | |||||
著者名(英) |
Monkawa,Akira
× Monkawa,Akira× Mikouchi,Takashi× Koizumi,Eisuke× Miyamoto,Masamichi |
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著者所属(英) | ||||||
en | ||||||
Department of Earth and Planetary Science, Graduate School of Science,University of Tokyo/Department of Earth and Planetary Science, Graduate School of Science,University of Tokyo/Department of Earth and Planetary Science, Graduate School of Science,University of Tokyo/Department of Earth and Planetary Science, Graduate School of Science,University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Chassigny and Nakhla frequently contain magmatic inclusions in olivine. Some Al-, Ti-rich augites in Chassigny magmatic inclusions show reverse zoning from the Mg-poor core to the Mg-rich rim. This unique chemical zoning in Chassigny magmatic inclusion gives important implications for the crystallization of the magmatic inclusions. The crystallization stage of the Mg-poor core is different from that of the Mg-rich rim because the zoned augite has a sharp boundary between the Mg-rich and Mg-poor regions. The presence of such Al-, Ti-augite with reverse zoning implies that the bulk composition of the magmatic inclusion changed into Mg-rich. Such a compositional change of the magmatic inclusion can be produced by the melting of the surrounding olivine. There is a possibility that the melting of surrounding olivine has occurred during a shock event. In order to examine the possibility of the melting by a shock event, this study compared texture and constituent minerals of Chassigny magmatic inclusions with those of Nakhla magmatic inclusions. Although Chassigny magmatic inclusions have remarkable radial cracks around them, Nakhla magmatic inclusions only have ambiguous radial cracks. The presence of radial cracks in the Chassigny magmatic inclusion shows that the inclusions have been affected by a heavy impact event because cracks around magmatic inclusions formed by the fracturing of a phenocryst induced by rapid compression and decompression. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11182426 | |||||
書誌情報 |
Antarctic meteorite research 巻 18, p. 188-201, 発行日 2005-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |