International Session (Oral)

Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT12] Tectonic processes on the incoming plate seaward of the trench: Inputs to subduction zones

Mon. May 23, 2016 1:45 PM - 3:15 PM 201B (2F)

Convener:*Makoto Yamano(Earthquake Research Institute, University of Tokyo), Tomoaki Morishita(School of Natural System, Colleage of Science and Technology, Kanazawa University), Gou Fujie(Japan Agency for Marine-Earth Science and Technology), Susanne Straub(Lamont-Doherty Earth Observatory, Columbia Univ., USA), Chair:Gou Fujie(Japan Agency for Marine-Earth Science and Technology)

Various tectonic processes occur on the seaward side of the trench associated with bending of the incoming oceanic plate, e.g., fracturing of oceanic crust, infiltration of water, and intraplate volcanism. Investigation of these processes and their influence on the incoming plate provides important information on the boundary condition at the trench, inputs to subduction zones. We welcome contributions from a broad range of earth science (geophysics, geology, petrology, and so on) discussing topics related to inputs to subduction zones such as occurrence of tectonic processes due to bending of the incoming plate, modification of the incoming plate by the processes, relationship between the processes and the inherited structure of the incoming plate, and influence of the processes on the subduction plate interface.

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1:45 PM - 2:00 PM

[SIT12-01] The Great Sanriku-oki earthquake of 2 March 1933: Source Characterization Based Regional and Far Field Information and Implications for Off-Trench Normal Faulting Tsunami Sources in Japan and Elsewhere

*Stephen Kirby¹, Naoki Uchida², Emile Okal³, Ryota Hino², Norihito Umino², Azusa Nishizawa⁴ (1.U.S. Geological Survey, Menlo Park, 2.Faculty of Science, Tohoku Univ., 3.Northwestern Univ., 4.Japan Coast Guard)

2:00 PM - 2:15 PM

[SIT12-02] Seismicity and its relation to the bending-related faults in the incoming Pacific Plate along the Japan Trench

★Invited papers

*Koichiro Obana¹, Gou Fujie¹, Shuichi Kodaira¹, Tsutomu Takahashi¹, Yojiro Yamamoto¹, Takeshi Sato¹, Mikiya Yamashita¹, Yuka Kaiho¹, Yasuyuki Nakamura¹, Seiichi Miura¹ (1.Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology)

2:15 PM - 2:30 PM

[SIT12-03] Local heat flow variations seaward of the Japan Trench: Implications for development of fractures in the oceanic crust

*Makoto Yamano¹, Yoshifumi Kawada², Hideki Hamamoto³, Shusaku Goto⁴ (1.Earthq. Res. Inst., Univ. Tokyo, 2.IRIDeS, Tohoku Univ., 3.Center Environ. Sci. Saitama, 4.Geol. Surv. Japan, AIST)

2:30 PM - 2:45 PM

[SIT12-04] Visco-elasto-plastic deformation and hydration of oceanic plates at trench-rise sytems

*Manuele Faccenda¹ (1.Dipartimento di Geoscienze, University of Padova)

2:45 PM - 3:00 PM

[SIT12-05] Mantle hydration along the outer rise faults inferred from permeability of serpentinites

*Kohei Hatakeyama¹, Ikuo Katayama¹ (1.Hiroshima university Department of earth and planetary systems science)

3:00 PM - 3:15 PM

[SIT12-06] An outline of Bend-Fault Hydrology in the Old Incoming Plate (H-ODIN) project and its perspective

*Tomoaki Morishita¹, Gou Fujie², Shigeaki Ono², Makoto Yamano³, Shuichi Kodaira², Jun-Ichi Kimura², Saneatsu Saito², Natsue Abe², Jason Morgan⁴ (1.Kanazawa University, 2.JAMSTEC, 3.University of Tokyo, 4.University of London)