[S-CG58] Investigation of inputs to subduction zones: Influence of tectonic processes on the incoming plate

Wed. May 23, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Makoto Yamano(Earthquake Research Institute, the University of Tokyo), Tomoaki Morishita(School of Natural System, Colleage of Science and Technology, Kanazawa University), Gou Fujie(海洋研究開発機構)

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.

[SCG58-P01] Progress and perspective of drilling plans that elucidate modification of oceanic plate just prior to subduction

*Tomoaki Morishita¹, Makoto Yamano², Gou Fujie³, Asuka Yamaguchi⁴, Shigeaki Ono³ (1.School of Natural System, Colleage of Science and Technology, Kanazawa University, 2.ERI, University of Tokyo, 3.JAMSTEC, 4.AORI, University of Tokyo)

[SCG58-P02] Crustal structure in the outer-rise off the Japan Trench

Shuhei Otomo¹, *Ryosuke Azuma¹, Ryota Hino¹, Gou Fujie², Shuichi Kodaira² (1.Recearch Center for Prediction of Earthquake and Volcanic Eruption, Graduate School of Science, Tohoku University, 2.Japan Agency for Marine-Earth Science and Technology)

[SCG58-P03] Bend faulting and a large seamount in the central Japan Trench

*Gou Fujie¹, Koichiro Obana¹, Yuka Kaiho¹, Tomoaki Yamada², Shuichi Kodaira¹, Takehi Isse², Seiichi Miura¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Earthquake Research Institute, University of Tokyo)

[SCG58-P04] Resistivity structure of incoming Pacific Plate around the Outer-Rise Region, off Japan Trench

*Shinya Sato¹, Tada-nori Goto¹, Takafumi Kasaya², Hiroshi Ichihara³, Makoto Yamano⁴ (1.Graduate School of Engineering, Kyoto University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Graduate school of environmental studies, Nagoya University, 4.Earthquake Research Institute, the University of Tokyo)

[SCG58-P05] Regional distribution of the incoming sediments along the Nankai Trough and its implications for the megathrust fault behavior

*Jin-Oh Park¹, Tetsuro Tsuru² (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Academic Assembly, Tokyo University of Marine Science and Technology)

[SCG58-P06] IODP Expedition 375: Hikurangi Subduction Margin – first chronostratigraphic constraints derived from shipboard palaeomagnetic analyses

*Annika Greve¹, Xuesen Li⁶, Katerina Petronotis³, Martin Crundwell², Claire Shepherd², Adam Woodhouse⁷, Phil Barnes⁴, Laura Wallace², Demian Saffer⁵, the IODP expedition 375 shipboard scientists (1.Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology, 2.GNS Science, 3.International Ocean Discovery Program, Texas A&M University, 4.National Institute of Water and Atmospheric Research (NIWA), 5.Department of Geosciences, Pennsylvania State University, 6.College of Earth Science, Guilin University of Technology, 7.School of Earth and Environment, University of Leeds)

Session information