東京大学地震研究所
Earthquake Research Institute, University of Tokyo
千葉大学大学院自然科学研究科
Graduate School of Science and Technology, Chiba University Present Address: DAIWA Exploration & Consulting Co, Ltd
徳島大学総合科学部
Facuty of Integrated Arts and Sciences, Tokushima University
千葉大学理学部
Faculty of Science, Chiba University
海洋研究開発機構
Japan Agency for MarineEarth Science and Technology (JAMSTEC)
（株）地球科学総合研究所
JGI, Inc
広島大学総合科学部
Facuty of Integrated Arts and Sciences, Hiroshima University
静岡大学理学部
Faculty of Science, Shizuoka University
岩手大学工学部
Faculty of Engineering, Iwate University
島根大学総合理工学部
Interdisciplinary Faculty of Science and Engineering, Shimane University
北海道大学大学院理学研究科
Faculty of Science, Hokkaido University
香川大学工学部
Faculty of Engineering, Kagawa University
熊本大学理学部
Faculty of Science, Kumamoto University
産業技術総合研究所地質調査総合センター
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
高知大学理学部
Faculty of Science, Kochi University
神戸大学理学部
Faculty of Science, Kobe University
宮崎大学教育文化学部
Faculty of Education and Culture, Miyazaki University
東北大学大学院理学研究科
Graduate School of Science, Tohoku University
テキサス大学エルパソ校
Department of Geological Sciences, University of Texas at El Paso
抄録
In 2002, an integrated seismic survey across the overall Outer zone of Southwest Japan was conducted in Shikoku and Seto Inland Sea. The seismic line, which was more than 130km long, transected all geologic constituents of the superficial Outer zone of Southwest Japan. The survey successfully provided the first crustal transection of the Outer zone of Southwest Japan. The transection gives the following important information on the crustal structure. 14 The upper crust of the Outer zone is characterized by N-dipping accretionary complexes, which have a S-younging sequence, as expected by the surface geology. 2. The Median Tectonic Line (MTL), the northern boundary of the Outer zone, dips northward at about 40 degrees, and reaches the lower crust whose lower boundary exhibits an upward convex shape. 3. The lower crust of the Outer zone is only 30km wide from the lower termination of the MTL. Most of the Outer zone has no lower crust. 4. The Philippine Sea plate (PHS) changes its subducting angle from 10 to 25 degrees around the southern border of the lower crust.
雑誌名
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
巻
80
号
2
ページ
53 - 71
発行年
2005
ISSN
00408972
書誌レコードID
AN00162258
フォーマット
application/pdf
日本十進分類法
051.1
出版者
東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
アイテムへのリンクの際はタイトル右肩にある「Permalink」をご利用ください！
Please use "Permalink" at the top right of the title when linking to items!
西南日本外帯の地殻構造 : 2002年四国―瀬戸内海横断地殻構造探査の成果 : 特集「地殻応力測定法の現状と解決するべき問題点」Part 2
IHO80201.pdf
(15.28MB)
