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Compositional zoning and its implication in a toroidal circulation inside the Yakushima Pluton, SW Japan
https://nipr.repo.nii.ac.jp/records/2343
https://nipr.repo.nii.ac.jp/records/2343570a6b63-173d-4ef1-8415-6695b6101a75
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012895 (2.7 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1998-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Compositional zoning and its implication in a toroidal circulation inside the Yakushima Pluton, SW Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | compositional zoning | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magmatic fabrics | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | diapir | |||||
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) |
Anma,Ryo
× Anma,Ryo× Kawano,Yoshinobu× Yuhara, Masaki |
|||||
著者所属(英) | ||||||
en | ||||||
Hans Ramberg Tectonic Laboratory, Uppsala University/ Faculty of Culture and Education, Saga University/ Graduate School of Science, Niigata University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The epizonal Yakushima pluton at the north end of the Ryukyu arc displays an asymmetrical compositional zoning. The core and southeastern periphery of the pluton are per-aluminous cordierite granitoids, whereas the main constituent of the pluton is cordierite-free and rather primitive in Rb-Sr and Nd-Sm isotopes. This doughnut-like compositional zoning in the Yakushima pluton share the same symmetry as the patterns of magmatic flow fabrics defined by alignment of rigid orthoclase megacrysts, suggesting a single toroidal circulation cell about an axis inclined toward northwest. Lithological contours inside this zoned pluton are locally truncated by the contours of intensities of solid-state deformation fabrics that developed during emplacement. Thus, the compositional zoning is likely to be inherited from an earlier stages of magmatic layering and relates the ascent processes. This paper attributes the doughnut-like compositional zoning of the Yakushima pluton to the drag along the pluton's contact that circulated granite interior and formed the magmatic flow fabrics during its ascent. Such doughnut-like compositional zoning is expected in a magmatic pluton that rose through a ductile media as a diapir. | |||||
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 53, p. 157-176, 発行日 1998-12 |