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Petrology and mineralogy of the PCA 91082 chondrite and its comparison with the Yamato-793495(CR) chondrite
https://doi.org/10.15094/00004667
https://doi.org/10.15094/0000466768476674-7ed3-44f8-826c-67d9ddcd99e3
名前 / ファイル | ライセンス | アクション |
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KJ00000036473 (3.2 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1995-03-01 | |||||
タイトル | ||||||
タイトル | Petrology and mineralogy of the PCA 91082 chondrite and its comparison with the Yamato-793495(CR) 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 | 10.15094/00004667 | |||||
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) |
Noguchi, Takaaki
× Noguchi, Takaaki |
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著者所属(英) | ||||||
en | ||||||
Department of Earth Sciences, Ibaraki University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Petrographic and mineralogical study of the PCA 91082 CR chondrite was performed using a scanning electron microscope (SEM) and an electron microprobe analyzer (EPMA). The present study shows that this meteorite has some unique petrographic and mineralogical properties which have not been observed in other CR chondrites. (1) About 40% of chondrules contain silica-pods in their outermost parts. Silica was probably formed by the adhesion of SiO_2-rich materials during chondrule formation. (2) Chondrules in PCA 91082 experienced a lesser degree of aqueous alteration than those in other CR chondrites. Only the peripheries of chondrules are altered in PCA 91082. Fe contents in the phyllosilicates in chondrules are higher than the values reported in other CR chondrites in which chondrules are altered into their cores. In Yamato (Y)-793495,the extent of aqueous alteration is similar to that in PCA 91082. Fe contents of phyllosilicates in chondrules in Y-793495 are also higher than those in the more altered CR chondrites. (3) PCA 91082 contains constituent components which experienced various alteration conditions. One phyllosilicate clast in PCA 91082 contains a Ca-sulfate component with magnesian phyllosilicates. Probably the clast experienced aqueous alteration on a parent body. The aqueous alteration condition of the clast was probably similar to that of Cls. | |||||
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 8, p. 33-62, 発行日 1995-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |