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^<40>Ar-^<39>Ar GEOCHRONOLOGICAL STUDIES OF GRANITIC ROCKS FROM SOUTH VICTORIA LAND, ANTARCTICA
https://doi.org/10.15094/00002793
https://doi.org/10.15094/0000279344923718-61a6-43ee-95a8-8d69ac77624b
名前 / ファイル | ライセンス | アクション |
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KJ00002368423 (970.3 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1995-09-01 | |||||
タイトル | ||||||
タイトル | ^<40>Ar-^<39>Ar GEOCHRONOLOGICAL STUDIES OF GRANITIC ROCKS FROM SOUTH VICTORIA LAND, 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 | |||||
ID登録 | ||||||
ID登録 | 10.15094/00002793 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
論文名よみ | ||||||
その他のタイトル | ^<40>Ar-^<39>Ar GEOCHRONOLOGICAL STUDIES OF GRANITIC ROCKS FROM SOUTH VICTORIA LAND, ANTARCTICA | |||||
著者名よみ |
タキガミ, ユタカ
× タキガミ, ユタカ× ワタナベ, テルオ |
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著者名(英) |
TAKIGAMI, Yutaka
× TAKIGAMI, Yutaka× WATANABE, Teruo |
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著者所属(英) | ||||||
en | ||||||
Kanto Gakuen University | ||||||
著者所属(英) | ||||||
en | ||||||
Deptartment of Applied Geology, Universtiy of Technology:Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | ^<40>Ar-^<39>Ar ages were obtained for two granitic rocks from the Dry Valleys region of South Victoria Land, Antarctica. One sample (biotite-rich fraction) of foliated granitoid gave three age increments of 491Ma, 502Ma and 506Ma, with K/Ca ratios suggesting influence of cooling ages of biotite (younger age) and that of hornblende (older age). Granitoid emplacement is thought to have been before 506Ma, with cooling from biotite closure temperatures about 490Ma. A sample of unfoliated granitoid gave ages of 467-496Ma. The similarity of ages determined for both "pre-tectonic" and "post-tectonic" samples indicate closure of isotopic systems around 490Ma due to regional uplift/exhumation, rather than actual emplacement ages of individual plutons in South Victoria Land. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1072335X | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences 巻 8, p. 160-168, 発行日 1995-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |