New perspective of great subduction-zone earthquakes from the super deep drilling

Administrative Group

Project Area	New perspective of great subduction-zone earthquakes from the super deep drilling
Project/Area Number	21107001
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	The University of Tokyo
Principal Investigator	KIMURA Gaku 東京大学, 理学(系)研究科(研究院), 教授 (80153188)
Co-Investigator(Kenkyū-buntansha)	PARK Jinu 東京大学, 大気海洋研究所, 准教授 (70359199) ASHI Juichiro 東京大学, 大学院新領域創成科学研究科, 准教授 (40251409) KANAGAWA Kyuichi 千葉大学, 大学院理学研究科, 教授 (40185898) KINOSHITA Masataka 独立行政法人海洋研究開発機構, 高知コア研究所, 所長 (50225009) IDE Satoshi 東京大学, 大学院理学系研究科, 教授 (90292713) SAITO Saneatsu 独立行政法人海洋研究開発機構, 海洋掘削科学研究開発センター, グループリーダー (40292859)
Co-Investigator(Renkei-kenkyūsha)	KURAMOTO Shinichi 独立行政法人海洋研究開発機構, 地球深部探査センター, 次長 (30211890) EGUCHI Nobuhisa 独立行政法人海洋研究開発機構, 地球深部探査センター, グループリーダー (20626204)
Project Period (FY)	2009-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Keywords	固体地球物理学 / 地震 / 大深度地下 / 地球変動予測 / 地質学 / 南海トラフ / 付加体 / 断層
Outline of Final Research Achievements	The objective of this project to gain “new perspective of great subduction zone earthquakes by the super-deep drilling has been accomplished through the following results of investigation; high velocity slip is possible along the plate boundary even near the trench, all the fault forming materials are weaken under the high velocity slip, and the fluid is quite key material to understand the fault mechanisms and earthquake mechanisms. These new perspectives were obtained from an integrated research of traditional seismology, geophysics with geology, geomorphology, geochemistry, rock and soil mechanics and others. Such an integlation is also an important aspect of this project. New technology of super-deep drilling for science also contributed a lot to develop the new perspective of the earthquake in subduction zone.