WEKO3
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Note on the mineral texture and chemistry of the eastern Bushveld Complex
https://nipr.repo.nii.ac.jp/records/2418
https://nipr.repo.nii.ac.jp/records/2418e1e947fd-d112-4d3c-adf2-074f2db89501
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012970 (2.6 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2001-07-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Note on the mineral texture and chemistry of the eastern Bushveld Complex | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Rustenburg Layered Suite | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Bushveld Complex | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | mineral texture | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | mineral chemistry | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magma mixing | |||||
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) |
Baba, Sotaro
× Baba, Sotaro× Hokada, Tomokazu× Saitoh, Tetsu× Hiroi, Yoshikuni× Shiraishi, Kazuyuki× Arima, Makoto× Harmer, Robin E. |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Crustal Studies, National Institute of Polar Research/Department of Crustal Studies, National Institute of Polar Research/Geological Institute, Yokohama National University/Department of Geology, Faculty of Science, Chiba University/Department of Crustal Studies, National Institute of Polar Research/Geological Institute, Yokohama National University/Council for Geoscience | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Preliminary petrological study was carried out for the Rustenburg Layered Suite in the eastern Bushveld Complex. The Rustenburg Layered Suite consists of the Marginal Zone, Lower Zone, Critical Zone, Main Zone and Upper Zone. The mineral texture and chemical compositional variations were examined from the Lower to the Upper Zone. Although the number of sample is small, the crystallization sequence and presence of two types of magma can be recognized from the following mineral textures and compositions : (1) Plagioclase occurs as a post-cumulus phase in rocks from the Lower Zone to lower subzone in the Critical Zone, whereas it occurs as a cumulus phase in rocks from the upper subzone in the Critical Zone, Main Zone and Upper Zone. (2) A distinctive compositional difference of plagioclase and orthopyroxene can be seen between the lower subzone and upper subzone in the Critical Zone. In the lower subzone in the Critical Zone, post-cumulus plagioclase has low An within the range of 74-50,whereas the upper subzone has An=83-63. This result is consistent with previous work. In addition, Norite in the upper subzone in the Critical Zone has orthopyroxene-developed (Opx-rich) and clinopyroxene-developed (Cpx-rich) domains. In the Opx-rich domain, high-X_<Mg> orthopyroxene and low-An plagioclase inclusions can be seen. On the other hand, both low-X_<Mg> orthopyroxene inclusions and high-An plagioclase inclusions are observed in the Cpx-rich domain. These textural and compositional relationships suggest possible magma mixing on the thin section scale. | |||||
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 55, p. 145-166, 発行日 2001-07 |