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PALEOMAGNETIC STUDY OF THE BEACON SUPERGROUP IN ANTARCTICA : REMAGNETIZATION IN THE JURASSIC TIME
https://doi.org/10.15094/00002561
https://doi.org/10.15094/00002561d2f89756-738d-4028-acb3-5ccb242843ef
名前 / ファイル | ライセンス | アクション |
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KJ00002368151 (1.1 MB)
|
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 | PALEOMAGNETIC STUDY OF THE BEACON SUPERGROUP IN ANTARCTICA : REMAGNETIZATION IN THE JURASSIC TIME | |||||
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 | 10.15094/00002561 | |||||
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) | |||||
著者名(英) |
SAKAI, Hideo
× SAKAI, Hideo× FUNAKI, Minoru |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Earth Sciences, Faculty of Science, Toyama University | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The Konigsberger-Thellier method was applied to the Beacon Supergroup of the Devonian period around the McMurdo Sound. Samples collected at the sites of Mt. Circe and Knobhead A have stable TRM. These sites are about 100m apart from the Jurassic Ferrar dolerite sill. Samples collected at the sites of Knobhead B and C about 150m apart from the dolerite sill, have the partial TRM. Microscopically the samples from Mt. Circe exhibit the dust-ring structure, and contain a minor amount of biotite as a secondary mineral. These results indicate that the Beacon Supergroup around the McMurdo Sound was thermally metamorphosed by the intrusion of the Jurassic Ferrar dolerite. This may explain why the Devonian VGP of Antarctica is far from the Devonian VGP of the Gondwanaland. The paleointensity estimated from the stable TRM in the Beacon sandstones was 50.5μT, which is slightly weaker than the present field intensity. | |||||
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. 46-54, 発行日 1988-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |