Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1985-09-01 |
タイトル |
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言語 |
en |
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タイトル |
Rb-Sr mineral isochron ages of metamorphic rocks around Syowa Station and from the Yamato Mountains, East Antarctica |
言語 |
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言語 |
eng |
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 |
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) |
Shibata, Ken
Yanai, Keizo
Shiraishi, Kazuyuki
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著者所属(英) |
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en |
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Geological Survey of Japan/National Institute of Polar Research/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 |
Rb-Sr mineral isochron ages were determined for three metamorphic rocks around Syowa Station and from the Yamato Mountains, eastern Queen Maud Land. The Rb-Sr isotopic data demonstrate that the complete Sr isotopic homogenization occurred among K-feldspar, plagioclase, biotite and whole-rock, and define isochron ages of 482.5±9.5,468.9±7.8 and 493.3±4.5 Ma for rocks from Syowa Station, Skarvsnes and the Yamato Mountains, respectively. These ages probably represent the time of cooling after the regional metamorphism or granite intrusion. K-Ar age determinations on three metamorphic rocks give biotite and hornblende ages of 469±14,480±15 and 483±15Ma, and 502±15Ma, respectively. |
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 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 37,
p. 164-171,
発行日 1985-09
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