Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2003-10-01 |
タイトル |
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タイトル |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
言語 |
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言語 |
eng |
キーワード |
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主題Scheme |
Other |
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主題 |
velocity model,Antarctica,Mizuho Plateau,crust |
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 |
10.15094/00003118 |
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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) |
著者名(英) |
Miyamachi, Hiroki
Toda, Shigeru
Matsushima, Takeshi
Takada, Masamitsu
Watanabe, Atsushi
Yamashita, Mikiya
Kanao, Masaki
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著者所属(英) |
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en |
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Department of Earth and Environmental Sciences, Faculty of Science,Kagoshima University/Department of Earth Sciences, Faculty of Education,Aichi University of Education/Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University/Institute of Seismology and Volcanology, Graduate School of Science,Hokkaido University/Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University/Department of Polar Science, The Graduate University for Advanced Studies/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 |
The 43rd Japanese Antarctic Research Expedition (JARE-43) carried out seismic exploration experiments on Mizuho Plateau,East Antarctica,in the austral summer season of ,2001-2002. The exploration was composed of seven large explosions and 161seismic stations distributed along the 151 km-long seismic line.The first arrival time data are analyzed by a refraction method.It is found that the ice sheet is composed of two layers:the upper layer with P wave velocity of 2.7-2.9 km/s has thickness of 35-45 m,and the lower layer with P wave velocity of 3.7-3.9 km/s continues to the bedrock.Lateral velocity variation in the upper-most crust is revealed:P wave velocity for the upper-most crust in the southern and central parts is 6.1-6.2 km/s and that in the northern part is5.9 km/s. This result implies that the geological boundary observed along the coast in the Lu tzow-Holm Bay and Prince Olav Coast regions possibly continues to the inland area.The S wave velocity is also obtained to be roughly 3.5km/s for the whole upper-most crust.Travel time analysis of two distinct reflection phases shows two horizontal reflecting planes located at 19 and 40km depth; the latter corresponds to the Moho discontinuity. |
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 16,
p. 1-21,
発行日 2003-10
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出版者 |
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出版者 |
National Institute of Polar Research |