Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1996-09-01 |
タイトル |
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タイトル |
META-ULTRAMAFIC ROCK FROM THE AUSTKAMPANE AREA OF THE SØR RONDANE MOUNTAINS, EAST ANTARCTICA |
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 |
meta-ultramafic rock |
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 |
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 |
cumulate |
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 |
Sør Rondane Mountains |
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 |
10.15094/00002822 |
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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) |
著者名よみ |
イシズカ, ヒデオ
スズキ, サトコ
コジマ, ヒデヤス
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著者名(英) |
ISHIZUKA, Hideo
SUZUKI, Satoko
KOJIMA, Hideyasu
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著者所属(英) |
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en |
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Department of Geology, Kochi University |
著者所属(英) |
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en |
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Department of Geology, Kochi University |
著者所属(英) |
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en |
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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 |
In the Austkampane area of the S∅r Rondane Mountains, East Antarctica, a meta-ultramafic rock occurs as a lenticular block enclosed within the host garnet-biotite gneiss of the granulite facies. The rock consists of olivine, orthopyroxene, amphibole, spinel, apatite, ilmenite, magnetite, chalcopyrite and pentlandite. The bulk rock analysis shows an ultramafic composition in a broad sense, but compared with mantle peridotites it is enriched in TiO_2,Al_2O_3,CaO, Nb and Zr, and has a slightly high ratio of FeO^*/MgO. This suggests a slightly differentiated basaltic cumulate as its precursor. After the igneous generation, the rock was incorporated within the original rock of the host gneiss (sedimentary quartzo-feldspathic rock), probably in the form of block-in-matrix, and then both rocks underwent the granulite facies metamorphism. The olivine-spinel geothermometer and Al_2O_3 content of orthopyroxene indicate metamorphic temperatures of about 780-820℃ and 750-800℃, respectively. Similar meta-ultramafic rocks have been reported from the Lützow-Holm Complex, suggesting that the similar association of original rocks such as oceanic lower crusts developed in these two granulite terrains. |
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 |
AA1072335X |
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences
巻 9,
p. 40-48,
発行日 1996-09
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出版者 |
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出版者 |
National Institute of Polar Research |