Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica
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...
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ftnipr:oai:nipr.repo.nii.ac.jp:00003118 2023-05-15T13:49:00+02:00 Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica Hiroki Miyamachi Shigeru Toda Takeshi Matsushima Masamitsu Takada Atsushi Watanabe Mikiya Yamashita Masaki Kanao 2003-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3118 http://id.nii.ac.jp/1291/00003118/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3118&item_no=1&attribute_id=18&file_no=1 en eng 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 National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3118 http://id.nii.ac.jp/1291/00003118/ AA1130866X Polar geoscience, 16, 1-21(2003-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3118&item_no=1&attribute_id=18&file_no=1 velocity model,Antarctica,Mizuho Plateau,crust Departmental Bulletin Paper P(論文) 2003 ftnipr 2022-12-03T19:43:04Z 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. Report Antarc* Antarctic Antarctica East Antarctica Ice Sheet Polar geoscience Prince Olav Coast National Institute of Polar Research Repository, Japan Antarctic East Antarctica Austral Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Plateau ENVELOPE(40.000,40.000,-73.000,-73.000) Prince Olav Coast ENVELOPE(41.000,41.000,-69.000,-69.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
velocity model,Antarctica,Mizuho Plateau,crust |
spellingShingle |
velocity model,Antarctica,Mizuho Plateau,crust Hiroki Miyamachi Shigeru Toda Takeshi Matsushima Masamitsu Takada Atsushi Watanabe Mikiya Yamashita Masaki Kanao Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
topic_facet |
velocity model,Antarctica,Mizuho Plateau,crust |
description |
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. |
format |
Report |
author |
Hiroki Miyamachi Shigeru Toda Takeshi Matsushima Masamitsu Takada Atsushi Watanabe Mikiya Yamashita Masaki Kanao |
author_facet |
Hiroki Miyamachi Shigeru Toda Takeshi Matsushima Masamitsu Takada Atsushi Watanabe Mikiya Yamashita Masaki Kanao |
author_sort |
Hiroki Miyamachi |
title |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
title_short |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
title_full |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
title_fullStr |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
title_full_unstemmed |
Seismic refraction and wide-angle reflection exploration by JARE-43 on Mizuho Plateau, East Antarctica |
title_sort |
seismic refraction and wide-angle reflection exploration by jare-43 on mizuho plateau, east antarctica |
publisher |
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 |
publishDate |
2003 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3118 http://id.nii.ac.jp/1291/00003118/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3118&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(40.000,40.000,-73.000,-73.000) ENVELOPE(41.000,41.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctica Austral Mizuho Mizuho Plateau Prince Olav Coast |
geographic_facet |
Antarctic East Antarctica Austral Mizuho Mizuho Plateau Prince Olav Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Polar geoscience Prince Olav Coast |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Polar geoscience Prince Olav Coast |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3118 http://id.nii.ac.jp/1291/00003118/ AA1130866X Polar geoscience, 16, 1-21(2003-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3118&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250362381008896 |