Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1979-03-01 |
タイトル |
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言語 |
en |
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タイトル |
Significance of the System CaMgSi2O6-CaAl2SiO6-CaTiAl2O6 to Ca-Al- Rich Inclusions in Carbonaceous Chondrites |
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) |
Onuma, Kosuke
Kimura, Makoto
Yagi, Kenzo
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著者所属(英) |
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en |
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Department of Geology and Mineralogy, Faculty of Science, Hokkaido University |
著者所属(英) |
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en |
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Department of Geology and Mineralogy, Faculty of Science, Hokkaido University |
著者所属(英) |
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en |
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Department of Geology and Mineralogy, Faculty of Science, Hokkaido University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
The system CaMgSi_2O_6-CaAl_2SiO_6-CaTiAl_2O_6 was found to be significant for elucidating the crystallization of Ca-Al-rich inclusions in carbonaceous chondrites. Two clinopyroxenes (ss)(ss : solid solution) were found in the present system : One is Ti-bearing diopside (ss) and the other is Ti-pyroxene (ss) containing TiO_2 up to 8.7wt.%. The chemical composition of this Ti-pyroxene (ss) is very close to that of clinopyroxene found in Ca-Al-rich inclusions of the Allende meteorite. An invariant point was confirmed at 1230℃ where the Ti-pyroxene coexists with spinel, perovskite, anorthite, melilite, and liquid. The assemblage of the crystalline phases is the same as that of Ca-Al-rich inclusions of the Allende meteorite. The bulk chemical compositions of the Type B inclusions of the Allende meteorite (GROSSMAN, 1975) are calculated in terms of CaMgSi_2O_6,CaAl_2SiO_6,CaTiAl_2O_6 and MgAl_2O_4 (spinel), and projected to the present system. The possible formation mechanism of the inclusions is discussed with reference to the crystallization of the system. |
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 12,
p. 134-143,
発行日 1979-03
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