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Rb-Sr WHOLE-ROCK AGES OF METAMORPHIC ROCKS FROM EASTERN QUEEN MAUD LAND, EAST ANTARCTICA (2) : TENMONDAI ROCK AND RUNDVAGSHETTA
https://doi.org/10.15094/00002574
https://doi.org/10.15094/000025748e950b66-fe43-47a2-9941-1d366035bbf8
名前 / ファイル | ライセンス | アクション |
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KJ00002368164 (79.0 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1988-09-01 | |||||
タイトル | ||||||
タイトル | Rb-Sr WHOLE-ROCK AGES OF METAMORPHIC ROCKS FROM EASTERN QUEEN MAUD LAND, EAST ANTARCTICA (2) : TENMONDAI ROCK AND RUNDVAGSHETTA | |||||
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 | 10.15094/00002574 | |||||
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) | |||||
記事種別(英) | ||||||
en | ||||||
ABSTRACT | ||||||
論文名よみ | ||||||
その他のタイトル | Rb-Sr WHOLE-ROCK AGES OF METAMORPHIC ROCKS FROM EASTERN QUEEN MAUD LAND, EAST ANTARCTICA (2) : TENMONDAI ROCK AND RUNDVAGSHETTA | |||||
著者名よみ |
ナカジマ, タカシ
× ナカジマ, タカシ× シバタ, ケン× シライシ, カズユキ× モトヨシ, ヨウイチ× ヒロイ, ヨシクニ |
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著者名(英) |
NAKAJIMA, Takashi
× NAKAJIMA, Takashi× SHIBATA, Ken× SHIRAISHI, Kazuyuki× MOTOYOSHI, Yoichi× HIROI, Yoshikuni |
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著者所属(英) | ||||||
en | ||||||
Geological Survey of Japan | ||||||
著者所属(英) | ||||||
en | ||||||
Geological Survey of Japan | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Earth Sciences, Faculty of Science, Chiba University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Geochronological study using the Rb-Sr whole-rock isochron method was carried out on the metamorphic rocks from two localities, Tenmondai Rock and Rundvagshetta, in eastern Queen Maud Land. Four migmatitic gneisses in the Tenmondai Rock area give an isochron of 780±70Ma with an initial ^<87>Sr/^<86>Sr ratio of 0.70463±33,which is approximately concordant with those of several other areas in eastern Queen Maud Land reported in SHIBATA et al. (Mem. Natl Inst. Polar Res., Spec. Issue. 43,133,1986). The quality of the isochron for Tenmondai Rock is not good because the data points have a small spread in ^<87>Rb/^<86>Sr ratio. As for Rundvagshetta, three of five analyzed granulites give an isochron of 3020±470Ma with an initial ^<87>Sr/^<86>Sr ratio of 0.70515±44. The age is the oldest so far obtained from eastern Queen Maud Land, and corresponds to those of the Archean Napier Complex of Enderby Land. This isochron is essentially controlled by a data point with an extraordinary high ^<87>Sr/^<86>Sr ratio (0.8416). This is quartzofeldspathic gneiss characterized by mesoperthitic texture, which is uncommon in eastern Queen Maud Land. There may be some fragments of Archean basement rocks in the vicinity of Syowa Station. | |||||
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 2, p. 172, 発行日 1988-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |