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Composition and structural substitution of meteoritic plagioclases (I)
https://nipr.repo.nii.ac.jp/records/1725
https://nipr.repo.nii.ac.jp/records/1725c9a65e6e-98ae-405a-85cc-12ec0a6ccb70
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||||
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公開日 | 1984-12-01 | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | Composition and structural substitution of meteoritic plagioclases (I) | |||||||||
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 | |||||||||
ページ属性 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | P(論文) | |||||||||
著者名(英) |
Miura, Yasunori
× Miura, Yasunori
× Tomisaka, Takeshi
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著者所属(英) | ||||||||||
en | ||||||||||
Department of Mineralogical Science and Geology, Faculty of Science, Yamaguchi University | ||||||||||
著者所属(英) | ||||||||||
en | ||||||||||
Department of Mineralogical Science and Geology, Faculty of Science, Yamaguchi University | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | Significant amounts of iron, magnesium and Na (and/or Ca) vacancy are found in meteoritic plagioclases of the Holbrook (L6), Willard (L6), Plainview (H5), ALH-77307,85 (C3) and Allende chondrites and the Juvinas eucrite. Seven components are used in this study, six of which were used already for lunar plagioclases; that is, KAl(Si)_3O_8,NaAl(Si)_3O_8,Ca(Al)_2(Si)_2O_8,(Fe, Mg)(Al)_2(Si)_2O_8,Ca(Fe, Mg)(Al)_3O_8,[ ](Si)_4O_8 and M(MT)O_8,where [ ] means Na and/or Ca vacancy, M=K, Na, Ca, and T=Al, Si. The amounts of components Ca(Fe, Mg)(Si)_3O_8 and (Fe, Mg)(Al)_2(Si)_2O_8 significantly decrease with ordinary An-content. The highest contents of components Ca(Fe, Mg)(Si)_3O_8 and (Fe, Mg)(Al)_2(Si)_2O_8 in this study are obtained as 29(mol%) in the ALH-77307,85 (C3) and 11(mol%) in the Allende (CV3) chondrites, respectively. The largest values of components [ ](Si)_4O_8 and M (MT)O_8 are found in this study as 8(mol%) in the Juvinas eucrite and 12(mol%) in the Allende (CV3) chondrite, respectively. Lower Fe/(Fe+Mg) ratio is characteristic of chondrule in meteorite. The Plainview chondrite showing unique behavior of a considerable variation of the components may indicate a mixture of various parent materials. Small amounts of excess M cations (i.e. M(MT)O_8) are observed mainly in the exsolved regions of plagioclase crystal in meteorite (esp. the Juvinas eucrite and the Holbrook chondrite). A plot of each end-member abundance vs. Ca(Al)_2(Si)_2O_8 may be considered a useful indicator of the formation process of the meteorite. | |||||||||
雑誌書誌ID | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AA00733561 | |||||||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 35, p. 210-225, 発行日 1984-12 |