Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1983-12-01 |
タイトル |
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言語 |
en |
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タイトル |
A Brachina-like inclusion in the Yamato-75097 L6 chondrite: A preliminary examination |
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) |
Yanai, Keizo
Matsumoto, Yukio
Kojima, Hideyasu
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著者所属(英) |
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en |
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National Institute of Polar Research |
著者所属(英) |
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en |
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Department of Mineralogical Sciences and Geology, Faculty of Science,Yamaguchi University |
著者所属(英) |
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en |
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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 |
A Brachina-like inclusion is identified in the Yamato-75097 L6 chondrite. The inclusion has a shiny black fusion crust and is relatively large (2.5×2.5×0.8cm) and about 15g in weight. The fusion crust is distinguished clearly from the dull black fusion crust of the host. Microscopically, the inclusion has a fine-grained granular texture and consists mainly of olivine with minor merrillite and plagioclase, and a little chromite. Plagioclase is isotropic and presumably maskelynite. Pyroxene, nickel-iron and troilite were not identified. The texture of the inclusion appears to be similar to that of the Brachina meteorite. Compositions of the constituent minerals are olivine average Fo_<76> (range Fo_<75.0-76.5>, %M. D.=1.1), maskelynite An_<15>Ab_<75>Or_<10> and merrillite (MgO_<=3.62> FeO_<=0.48> CaO_<=44.9> Na_2O_<=2.79> P_2O_<5=47.4>). Olivine is compositionally homogeneous and relatively Mg-rich compared with that of Brachina. The olivine composition is very similar to that of the host. |
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 30,
p. 29-35,
発行日 1983-12
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