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"Dehydrated" chondrules from the Murchison (CM) chondrite
https://doi.org/10.15094/00004701
https://doi.org/10.15094/00004701839b4cbc-09cf-4fbc-a2ab-8535d64f3dc6
名前 / ファイル | ライセンス | アクション |
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KJ00000036507 (1.0 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1996-03-01 | |||||
タイトル | ||||||
タイトル | "Dehydrated" chondrules from the Murchison (CM) chondrite | |||||
言語 | ||||||
言語 | eng | |||||
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 | 10.15094/00004701 | |||||
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) | |||||
著者名(英) |
Inoue,Mutsuo
× Inoue,Mutsuo× Nakamura,Noboru |
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著者所属(英) | ||||||
en | ||||||
Division of Environmental Science, Graduate School of Science and Technology, Kobe University/Division of Environmental Science, Graduate School of Science and Technology, Kobe University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Two "dehydrated" chondrules (MC-5 and MC-27) were obtained from close to the fusion crust of the Murchison (CM) meteorite. They have a porphyritic texture with angular or rounded (relict) olivines containing abundant voids, recrystallized olivines, and numerous interstitial Fe oxide grains embedded in groundmass glass. This peculiar texture is similar to that of the fusion crust from the Orgueil (CI) chondrite, indicating that the texture formed during the reheating at the atmospheric entry of the meteorite. Isotope dilution analyses indicate that these chondrules have light-REE depleted pattern with a large negative Eu anomaly (CI normalized Sm/La ratio=1.3-2.4,Eu/Eu^*=0.40-0.57). They also show relatively low Ba and Sr (0.4-1.0×CI) concentrations and depletion of alkalies (0.2-0.4×CI). The lithophile element abundances of the two chondrules are in a similar range of those for other altered CM chondrules in the Murchison and the Yamato-793321 chondrites. It is suggested that the chemical compositions of chondrules, specifically REE and alkali abundances, remained unchanged but significant changes of petrographic texture occurred during atmospheric heating. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10784627 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Meteorites 巻 9, p. 69-78, 発行日 1996-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |