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Origin of unusual impact melt rocks, Yamato-790964 and 790143 (LL-chondrites)
https://doi.org/10.15094/00005922
https://doi.org/10.15094/0000592253dece13-b2e7-49fc-bfd1-c0840219e708
名前 / ファイル | ライセンス | アクション |
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KJ00000040914 (1.9 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1998-03-01 | |||||
タイトル | ||||||
タイトル | Origin of unusual impact melt rocks, Yamato-790964 and 790143 (LL-chondrites) | |||||
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 | 10.15094/00005922 | |||||
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) |
Yamaguchi, Akira
× Yamaguchi, Akira× Scott, Edward R.D.× Keil, Klaus |
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著者所属(英) | ||||||
en | ||||||
Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa/Also associated with the Hawai'i Center for Volcanology/Also associated with the Hawai'i Center for Volcanology | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We have studied Yamato (Y)-790964 and-790143,which are unusual paired impact-melted LL chondrites. Some petrologic aspects of these impact melt rocks are similar to those of the impact melted L-chondrite, Ramsdorf; these meteorites experienced nearly total melting, yet partly preserve chondritic textures. Olivine and chromite grains in Y-790964 and olivine in Y-790143 are the only relicts of the precursor materials; they were solid clasts during impact melting. All other portions (i.e., chondrules and matrices) were totally melted. It appears that the chondrule ghosts, which are mainly composed of very fine-grained igneous-textured pyroxene, minor olivine and other phases, were melted and crystallized in situ, without significant mixing with less viscous melts. Partial resorption of olivines and chromites suggests that the post-shock temperature could be >∿1600℃. The minor local differences in mineralogy appear to be consistent with small spatial variations in thermal history. Evidence of complex injection of troilite, Fe, Ni-metal and feldspathic glass into the relict minerals suggests that the precursor rock was shocked in situ. The shock pressure might have been >75 or 90GPa for a non-porous precursor rock or >20-40GPa for a porous rock. | |||||
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 11, p. 18-31, 発行日 1998-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |