Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1998-10-01 |
タイトル |
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タイトル |
Paleomagnetic study of marine sediments from Antarctic Sea-Central Wilkes Land margin, Dumon d'Urville Sea and Victoria Land Basin- |
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 |
magnetization of sedimentary cores |
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 |
geomagnetic polarity reversals |
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 |
Antarctic Sea |
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 |
Brunhes/Matuyama boundary |
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 |
secular change of geomagnetic intensity |
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 |
10.15094/00003030 |
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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) |
論文名よみ |
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その他のタイトル |
Paleomagnetic study of marine sediments from Antarctic Sea-Central Wilkes Land margin, Dumon d'Urville Sea and Victoria Land Basin- |
著者名(英) |
Sakai,Hideo
Kikawa,Eiichi
Ishihara,Takemi
Kobayashi,Hironori
Komori,Kiyoshi
Sunagawa,Aiko
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著者所属(英) |
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en |
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Department of Earth Sciences, Faculty of Science, Toyama University/Global Environmental Laboratory, Faculty of Education, Toyama University/Marine Geology Department, Geological Survey of Japan/Department of Earth Sciences, Faculty of Science, Toyama University/Global Environmental Laboratory, Faculty of Education, Toyama University/Global Environmental Laboratory, Faculty of Education, Toyama University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
Paleomagnetic study is conducted on sediment cores from the Antarctic Ocean off the Central Wilkes Land margin, the Dumont d'Urville Sea and Victoria Land Basin The Brunhes/Matuyama geomagnetic polarity boundary (B/M boundary, 0 78 Ma) and the Jaramillo geomagnetic event (0 99-1 07 Ma) are identified in five cores at the Central Wilkes Land margin One core from the Victoria Land Basin shows the B/M boundary The assigned magnetostratigraphical age indicates the sedimentation rate of between 3 and 5 mm/ky The susceptibility variation with depth is studied The upper sequence younger than 0 4 Ma shows variation with larger amplitude than that of the lower sequence, however, the average and frequency dependence of susceptibility do not show distinct changes This suggests a change of sedimentary environment around 0 4 Ma, which may be correlated with the global climate change The magnetic intensity normalized by susceptibility shows a distinct decrease around B/M boundary, the intensity is higher in the Brunhes epoch than that in the Matuyama epoch The result is similar to the variation of geomagnetic dipole moment studied by J P VALET and L MEYNADIER (Nature, 366, 234, 1993) on the ODP cores from the Pacific Ocean This suggests that there was a global change of geomagnetic field intensity, between the Matuyama reversed epoch and the Brunhes normal epoch |
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 |
AA1130866X |
書誌情報 |
Polar geoscience
巻 11,
p. 222-238,
発行日 1998-10
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出版者 |
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出版者 |
National Institute of Polar Research |