2010 Fiscal Year Final Research Report
Deformation and processes of physical evolution of sediments in 2-3 km burial depth at subduction zone
| Project/Area Number |
21740363
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
YAMAMOTO Yuzuru Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, 研究員 (10435753)
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| Project Period (FY) |
2009 – 2010
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| Keywords | テクトニクス / 付加体 / 地震 |
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| Research Abstract |
Change in deformation styles and the related transition from smectite to illite within the aseismic-seismic transition zone (2-4 km below the seafloor) in a subduction zone were analyzed by studying an onland accretionary complex that was previously buried to a depth of just 2-4 km. Such strain hardening associated with the clay mineral transition and decrease in porosity is the primary mechanism of thickening of the decollement and/or melange zone, and represents a fundamental mechanical/chemical change in the properties of sediments immediately before entering the seismogenic zone.
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[Journal Article] Systematic development of submarine slope failures at subduction margins : fossil record of accretion-related slope failure in the Miocene Hota Accretionary Complex, Central Japan. In Yamada, Y., et al. (eds) Submarine Mass Movements and Their Consequences.
Author(s)
Yamamoto, Y., Yamada, Y., Yamashita, Y., Chiyonobu, S., Shibata, T., Hojo, M.
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Journal Title
Advances in Natural and Technological Hazards Research Series(Springer) in press
Peer Reviewed
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