Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2001-10-01 |
タイトル |
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タイトル |
Ultrahigh temperature sapphirine-osumilite and sapphirine-quartz granulites from Bunt Island in the Napier Complex, East Antarctica -Reconnaissance estimation of P-T evolution - |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
sapphirine |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
osumilite |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
P-T path |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Bunt Island |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Napier Complex |
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 |
ID登録 |
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ID登録 |
10.15094/00003082 |
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ID登録タイプ |
JaLC |
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) |
Osanai, Yasuhito
Toyoshima, Tsuyoshi
Owada, Masaaki
Tsunogae, Toshiaki
Hokada, Tomokazu
Crowe, Warwick A.
Kusachi, Isao
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著者所属(英) |
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en |
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Department of Earth Sciences, Okayama University/Department of Geology, Niigata University/Department of Earth Sciences, Yamaguchi University/Institute of Geoscience, University of Tsukuba/National Institute of Polar Research/Department of Geology and Geophysics, University of Western Australia/Department of Earth Sciences, Okayama 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 summer party of the 39th Japanese Antarctic Research Expedition (1997-1998) carried out geological field work on Bunt Island at the southeastern end of Amundsen Bay, Enderby Land, which is in the highest-grade metamorphic region in the Napier Complex. The island is underlain by various kinds of ultrahigh-temperature (UHT) metamorphic rocks including osumilite-bearing aluminous sapphirine-garnet-orthopyroxene granulite and quartz-predominant sapphirine-garnet-sillimanite gneiss containing the assemblage sapphirine-quartz. Osumilite-bearing aluminous granulite is silica-undersaturated, aluminous and magnesian chromium-rich chemical affinity. Osumilite-bearing granulite from Bunt Island could be formed through the mixing of clayey materials or other felsic components derived from felsic igneous rocks with a relatively high proportion of mafic to ultramafic detritus in the sedimentary precursor. The chemical mixing could have taken place during c. 3.2 and c. 2.5 Ga. P-T estimation for osumilite-bearing granulite and related sapphirine-quartz gneiss indicates ultrahigh-temperature condition (~1100℃, ~1100 Mpa) as well as other high-grade rocks from the Napier Complex, but the rocks from Bunt Island clearly show isothermal decompression in part of the clockwise P-T evolutional process. |
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 |
AA1130866X |
書誌情報 |
Polar geoscience
巻 14,
p. 1-24,
発行日 2001-10
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出版者 |
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出版者 |
National Institute of Polar Research |