Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2004-10-01 |
タイトル |
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タイトル |
High-grade metamorphic rocks from Skallevikshalsen in the Lutzow-Holm Complex, East Antarctica: metamorphic conditions and possibility of partial melting |
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 |
igh-grade metamorphic rocks |
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 |
mineral chemistry |
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 |
partial melting |
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 |
Skallevikshalsen |
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 |
Lutzow-Holm 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 |
10.15094/00003137 |
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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) |
論文名よみ |
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その他のタイトル |
High-grade metamorphic rocks from Skallevikshalsen in the Lutzow-Holm Complex, East Antarctica: metamorphic conditions and possibility of partial melting |
著者名(英) |
Yoshimura, Yasutaka
Motoyoshi, Yoichi
Miyamoto, Tomoharu
Grew, Edward S.
Carson, Christopher J.
Dunkley, Daniel J.
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著者所属(英) |
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en |
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Department of Natural Environmental Science, Kochi University/National Institute of Polar Research/Department of Earth and Planetary Sciences, Kyushu University/Department of Geological Science, University of Maine/Geologcal Survey of Canada/National Institute of Polar Research |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
The high-grade metamorphic rocks of Skallevikshalsen, Lutzow-Holm Complex, East Antarctica predominantly comprise garnet-sillimanite gneiss, garnet-spinel-sillimanite gneiss, garnet-biotite gneiss and garnet-two pyroxene-mafic granulite. The metamorphic conditions were estimated using various geothermometers and geobarometers for garnet-biotite gneiss and mafic gneiss. The results were 770-940℃and 0.65-1.2 GPa for garnet-biotite gneiss and 780-960℃ and 0.6-1.1 GPa for mafic gneiss. Garnet-biotite gneiss is widespread in this area and displays a well-developed migmatitic structure. Garnet porphyroblasts in the leucosome and the boundaries between leucosome and melanosome in garnet-biotite gneiss commonly have a poikiloblastic texture with euhedral feldspar and quartz inclusions. High Y concentrations in garnet cores, high An values for plagioclase inclusions, and high Ba contents in K-feldspar from garnet-biotite gneiss are inferred to reflect growth in the presence of partial melt. Garnet in garnet-sillimanite gneiss also has high Y and P contents and chemical zoning that implies changes in trace element distribution coefficients. It is suggested that hydrous melt in garnet-sillimanite gneiss was generated during prograde metamorphism while anhydrous restite underwent continuous high-temperature metamorphism. Garnet-sillimanite gneiss is likely to be the restitic product of partial melting and shows evidence for melt segregation and movement. |
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 17,
p. 57-87,
発行日 2004-10
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出版者 |
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出版者 |
National Institute of Polar Research |