[S-CG67] [EE] Tectonic processes on the incoming plate seaward of the trench: Inputs to subduction zones

Tue. May 23, 2017 10:45 AM - 12:15 PM A05 (Tokyo Bay Makuhari Hall)

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), Jason Phipps Morgan(Royal Holloway University of London), Chairperson:Jason Morgan(Royal Holloway, University of London)

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. We hope discussions are made on studies of a variety of subduction zones, including the Japan Trench and the Nankai Trough, and comparative studies among different subduction zones.

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10:45 AM - 11:00 AM

[SCG67-07] Metasomatic records of lithosphere prior to subduction inferred from petit-spot

★Invited papers

*Naoto Hirano^1,2, Yuki Sato², Arashi Taki² (1.Center for Northeast Asian Studies, Tohoku University, 2.Graduate School of Science, Tohoku University)

11:00 AM - 11:15 AM

[SCG67-08] Transition of stress state of the oceanic lithosphere from shallower-half compression to shallower-half extension in outer rise

*Ryohei Sasajima¹, Takeo Ito¹ (1.Graduate School of Environmental Studies, Nagoya University)

11:15 AM - 11:30 AM

[SCG67-09] Well-log characterization of hydration and dehydration processes in oceanic lithosphere: from mid-ocean ridges to subduction zones

*Masako Tominaga¹ (1.Texas A&M University College Station)

11:30 AM - 11:45 AM

[SCG67-10] The Permeability Structure of Oceanic Crust and Implications for Subduction Zone Hydrology

*Keir Becker¹, Earl E. Davis², Andrew T. Fisher³ (1.University of Miami - RSMAS, Miami FL USA, 2.Geological Survey of Canada, Sidney BC Canada, 3.University of California, Santa Cruz CA USA)

11:45 AM - 12:00 PM

[SCG67-11] A review of hydrothermal heat transport models explaining high heat-flow anomalies observed near the Japanese Islands

*Yoshifumi Kawada¹, Makoto Yamano² (1.International Research Institute of Disaster Science, Tohoku University, 2.Earthquake Research Institute, The University of Tokyo)

12:00 PM - 12:15 PM

[SCG67-12] The nature of actively deforming Wharton Basin and its role in the subduction processes, offshore northern Sumatra

*Satish Chandra Singh¹, Yanfang Qin¹, Helene Carton¹, Nugroho Hananto³, Paul Tapponnier² (1.Institut de Physique du Globe de Paris, 2.Earth Observatory of Singapore, Nanyang Technological University, 3.Indonesian Institute of Science, GeoTech, Bandung)

Session information