| Co-Investigator(Kenkyū-buntansha) |
YAMANO Makoto Earthquake Research Institute, University of Tokyo, 地震研究所, 助教授 (60191368)
UTADA Hisashi Earthquake Research Institute, University of Tokyo, 地震研究所, 助教授 (70134632)
TSUNOGAI Urumu Faculty of Science, university of Tokyo, 理学部(日本学術振興会), 特別研究員
KANAZAWA Toshihiko Earthquake Research Institute, University of Tokyo, 地震研究所, 教授 (30114698)
ASHI Juichiro Graduate School of Science, University of Tokyo, 大学院理学系研究科, 助手 (40251409)
ISHIBASHI Junichiro Faculty of Science, university of Tokyo, 理学部, 助手 (20212920)
HAMANO Yozo Graduate School of Science, University of Tokyo, 大学院理学系研究科, 教授 (90011709)
NAKASHIMA Satoru Graduate School of Science, University of Tokyo, 大学院理学系研究科, 助教授 (80237255)
KINOSHITA Hajimu Earthquake Research Institute, University of Tokyo, 地震研究所, 教授 (10110347)
TOKUNAGA Tomochika Graduate School of Engineering, University of Tokyo, 大学院・工学系研究科, 助手 (70237072)
KINOSHITA Masataka School of Marine Science & Technology, Tokai University, 海洋学部, 講師 (50225009)
FUJII Naoyuki Faculty of Science, Nagoya University, 理学部, 教授 (60011631)
MASUZAWA Toshiyuki Institute of hydrosphere and atmospheric Sciences, Nagoya University, 大気水圏科学研究所, 助教授 (40023858)
TAKEUCHI Akira Faculty of Science, Toyama University, 理学部, 助教授 (20126494)
SAKAI Hitoshi Faculty of Science, Yamagata University, 理学部, 教授 (00033126)
OGAWA Yujiro School of Geoscience, Tsukuba University, 地球化学系, 教授 (20060064)
SHINOHARA Masanao Faculty of Science, Chiba University, 理学部, 助教授 (90242172)
KATO Yoshihisa School of Marine Science & Technology, Tokai University, 海洋学部, 助教授 (00152752)
ANDO Masataka Disaster Prevention Res.Inst., Kyoto University, 防災研究所, 教授 (80027292)
SHIMAMURA Hideki Faculty of Science, Hokkaido University, 理学部, 教授 (10011636)
FOUCHER Jean-Paul IFREMER,France, 主任研究員
LALLEMAND Serge University de Montpellier II,France, 研究員
LE PICHON Xavier Ecole Normale Superieure, France, 教授
CADET Jean-Paul University Pierre et Marie Curie, France, 教授
BALMINO Georges International Bureau of Gravity, France, 局長
TARITS Pascal University de Bretagne Occidentale, France, 教授
HENRY Pierre Ecole Normale Superieure, France, 研究員
LALLEMANT Si エコールノルマルシュペリオール(パリ高級大学院), 助教授
WAKITA Hiroshi Faculty of Science, university of Tokyo, 理学部, 教授 (40011689)
TOH Hiroaki Ocean Research Institute, University of Tokyo, 海洋研究所, 助手 (40207519)
TOKUYAMA Hidekazu Ocean Research Institute, University of Tokyo, 海洋研究所, 助教授 (10107451)
FUJIMOTO Hiromi Ocean Research Institute, University of Tokyo, 海洋研究所, 助教授 (50107455)
SUYEHIRO Kiyoshi Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (20133928)
TAMAKI Kensaku Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (30013535)
OHTA Suguru Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (10013591)
TAIRA Keisuke Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (50013579)
NAKAYAMA Eiichiro School of Environmental Science, University of Shiga Prefecture, 環境科学部, 助教授 (50108982)
TAIRA Asahiko Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (50112272)
徐 垣 九州大学, 理学部, 助教授 (90183847)
SEGAWA Jiro Ocean Research Institute, University of Tokyo, 海洋研究所, 教授 (60013570)
SOH Won Faculty of Science, Kyushu University
LALLEMAND Siegfried Ecole Normale Superieure, France
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| Research Abstract |
The purpose of this project is to promote interdisciplinary studies on fluid circulation, crustal deformation and biological activities in the Nankai Trough accretionary prism, as part of the Japan-France cooperative KAIKO-TOKAI Project. Since the beginning of the KAIKO project in 1984, it has been known that the northwestward subduction of the Philippine Sea plate under the Eurasian plate forms a huge accretionary prism along the Nankai Trough, where circulating fluid in sedimentary layrs, accompanied with cold seepage on the sea bottom, likely plays an important role in causing large-scale crustal deformation such as big earthquakes. The KAIKO-TOKAI Project aims at elucidating geophysical, geological, geochemical and ecological characteristics of the accretionary prism, by using research vessels and submersibles. During 1994-1996,3 cruises of R/V Hakuho Maru (Ocean Research Institute, University of Tokyo), 2 cruises of R/V Tansei Maru (Ocean Research Institute, University of Tokyo), 1 cruise of R/V L'Atalante (IFREMER,France), 12 dives of DSRV Shinkai 2000 (JAMSTEC) and 8 dives of DSRV Shinkai 6500 (JAMSTEC) were devoted for this project. Results obtained during these cruises and dives have been presented and discussed at the KAIKO-TOKAI Steering Committee meetings, which were held in Japan and France once in each year. Remarkable results so far obtained are as follows : (i) another subduction was identified along the southern rim of the Zenisu Ridge by OBS observations and differential GPS measurements, (ii) Detailed crustal structure has been revealed by 120 channel seismic surveys, (iii) H_2S production by sulfate reduction (methane oxidation) was first confirmed through isotope measurements of methane dissolved in pore fluids from accretionary prism sediment, etc. The KAIKO-TOKAI project will last till the end of the 1997 fiscal year, when an international symposium will be held in Japan in order to review this project totally.
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