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Petrography and geothermometry-geobarometry of Botnnuten, East Antarctica
https://nipr.repo.nii.ac.jp/records/1789
https://nipr.repo.nii.ac.jp/records/1789d6fc7b4e-15d1-4fb2-8b8e-0912aef8a40c
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 | 1985-09-01 | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | Petrography and geothermometry-geobarometry of Botnnuten, East Antarctica | |||||||||
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) |
Motoyoshi, Yoichi
× Motoyoshi, Yoichi
× Shiraishi, Kazuyuki
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著者所属(英) | ||||||||||
en | ||||||||||
Department of Geology and Mineralogy, Faculty of Science, HokkaidoUniversity/National Institute of Polar Research | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | Botnnuten is an isolated nunatak situated between Lutzow-Holm Bay and the Yamato Mountains, East Antarctica. It is composed of well-layered pelitic and basic gneisses with subordinate amounts of calc-silicate rock. The petrographical examinations revealed that the assemblages of sillimanite+Kfeldspar+biotite in the pelitic gneiss, and garnet+clinopyroxene+orthopyroxene+plagioclase+quartz in the basic gneiss are observed to have coexisted stably. Sillimanite+spinel assemblage included in porphyroblastic garnet is totally interpreted to be a breakdown product after staurolite during the prograde recrystallization. The present phase relations and geothermo-barometries yielded the metamorphic conditions of Botnnuten rocks to be 750-800℃ at 5-6 kbars. On the basis of the petrographical features with respect to the occurrence of aluminous silicate minerals and the recrystallization history inferred from the textural relationships, and the P-T conditions mentioned above, it is concluded that Botnnuten is a low-pressure portion of the Lutzow-Holm Complex. | |||||||||
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 37, p. 127-146, 発行日 1985-09 |