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Yamato-82162: A new kind of CI carbonaceous chondrite found in Antarctica
https://doi.org/10.15094/00004477
https://doi.org/10.15094/00004477b7ab4b1e-3fe4-4614-8b45-1c35f06035fa
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00000036283 (2.2 MB)
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| Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 1989-10-01 | |||||
| タイトル | ||||||
| タイトル | Yamato-82162: A new kind of CI carbonaceous chondrite found in Antarctica | |||||
| 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 | 10.15094/00004477 | |||||
| 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) |
Tomeoka, Kazushige
× Tomeoka, Kazushige× Kojima, Hideyasu× Yanai, Keizo |
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| 著者所属(英) | ||||||
| 言語 | en | |||||
| 値 | Mineralogical Institute, Faculty of Science, University of Tokyo | |||||
| 著者所属(英) | ||||||
| 言語 | en | |||||
| 値 | National Institute of Polar Research | |||||
| 著者所属(英) | ||||||
| 言語 | en | |||||
| 値 | National Institute of Polar Research | |||||
| 抄録(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | A petrographic and mineralogical study of the Yamato-82162 (Y-82162) meteorite shows that it may be the first CI carbonaceous chondrite that has ever been found in Antarctica. Y-82162 consists largely of fine-grained, phyllosilicaterich matrix and contains a large amount of Ni-bearing pyrrhotite and small amounts of framboidal, platy, spheroidal, and anhedral magnetite, Mg-Fe-rich carbonates, and Ca-phosphate. Isolated clusters of coarsely crystallized phyllosilicates are also present. The presence of these minerals supports the idea that Y-82162 is a CI carbonaceous chondrite. However, this meteorite shows several mineralogical features that apparently differ from non-Antarctic CI chondrites : it has much higher abundances of coarse phyllosilicates and pyrrhotite than non-Antarctic CI chondrites, and has no veins of sulfates and carbonates, suggesting that it was derived from different primary materials and has experienced a different aqueous alteration history from non-Antarctic CI chondrites. The Y-82162 matrix also contains abundant fine grains of olivine, which contrasts with non-Antarctic CI chondrites. The textures suggest that matrix phyllosilicates were dehydrated and altered to olivine by heating. Thus, this meteorite probably has been affected by mild thermal metamorphism. These results indicate that Y-82162 has experienced a distinct late history from the non-Antarctic CI chondrites, suggesting that it may have been derived from a different source from that of non-Antarctic CI chondrites. | |||||
| 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 2, p. 36-54, 発行日 1989-10 |
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| 出版者 | ||||||
| 出版者 | National Institute of Polar Research | |||||
