Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1984-12-01 |
タイトル |
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言語 |
en |
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タイトル |
Antarctic howardites and their primitive crust |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Takeda, Hiroshi
Mori, Hiroshi
Ikeda, Yukio
Ishii, Teruaki
Yanai, Keizo
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著者所属(英) |
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en |
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Mineralogical Institute, Faculty of Science, University of Tokyo/Mineralogical Institute, Faculty of Science, University of Tokyo/Department of Earth Sciences, Faculty of Science, Ibaraki University/Ocean Research Institute, University of Tokyo/National Institute of Polar Research |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
Lithic clasts and mineral fragments in Yamato-79 howardites, Y-790727,Y-791208 and Y-791492 have been investigated by optical microscopy, electron microprobe and single crystal X-ray diffraction. These howardites are chemically intermediate between ordinary diogenites and eucrites, and distinct from Y-7308. Some lithic clasts are also intermediate in mineralogy between endmember diogenites and eucrites, including a cumulate eucrite clast with a partly inverted pigeonite, an ordinary eucrite-like gabbroic clast intermediate in chemical composition between cumulate eucrites and ordinary eucrities, and an augite rich clast with a silica mineral. A partial melting model and fractional crystallization models have been compared to account for these new howardites, and models involving two-stage process are proposed. These howardites may have been products of excavation by an impact or impacts shallower than that for Y-7308 but deeper than those for polymict eucrites. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 35,
p. 81-101,
発行日 1984-12
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