WEKO3
アイテム
A mineralogical study of the proposed paired eucrites Y-792769 and Y-793164 with reference to cratering events on their parent body
https://doi.org/10.15094/00004637
https://doi.org/10.15094/000046375e19a06c-2b80-4930-b026-d6e79756c558
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000036443 (2.2 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1994-03-01 | |||||
タイトル | ||||||
タイトル | A mineralogical study of the proposed paired eucrites Y-792769 and Y-793164 with reference to cratering events on their parent body | |||||
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 | 10.15094/00004637 | |||||
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) |
Takeda, Hiroshi
× Takeda, Hiroshi× Yamaguchi, Akira× Nyquist, L. E.× Bogard, D. D. |
|||||
著者所属(英) | ||||||
言語 | en | |||||
値 | Mineralogical Institute, Faculty of Science, University of Tokyo/Mineralogical Institute, Faculty of Science, University of Tokyo/Mail Code SN, NASA Johnson Space Center/Mail Code SN, NASA Johnson Space Center | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | A comparison of the mineralogy of Yamato (Y-) 792769 and Y-793164 has been performed to confirm the proposed pairing of these two specimens and to correlate their common shock-sintered textures with the resetting of their isotopic ages. The matrices of the two meteorites share this common texture as described for Y-792769,but their clast types are different. Y-792769 contains pyroxene fragments with Mg-rich compositions, which are not present in the matrix. A large basaltic clast present in Y-793164 includes acicular plagioclase crystals replacing the pyroxene grains. Pyroxene clasts in the matrix of the two meteorites showed a small compositional range between 30 and 45 in Mg×100/(Mg+Fe) mol% and are similar to the more comminuted matrix pyroxenes, but lithic clast pyroxenes are uniform in bulk chemistry within a single clast type. The event which produced these monomict eucrites with minor compositional differences may have taken place earlier than the reset ^<39>Ar-^<40>Ar age of 3.99 Ga previously found for Y-792769. Some pyroxenes are more Fe-rich than those of common monomict eucrites such as Juvinas. The common pyroxene components and the shock-sintered textures support the proposed pairing of Y-792769 and Y-793164. Rb and Sr abundances and isotopic data do not strongly support the proposed pairing of the meteorites, but could be consistent with observed compositional heterogeneities within and between them. Sm and Nd abundances and isotopic data are similar for matrix samples of the meteorites and are consistent with their pairing. | |||||
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 7, p. 73-93, 発行日 1994-03 |
|||||
出版者 | ||||||
出版者 | National Institute of Polar Research |