JpGU-AGU Joint Meeting 2020

Session information

[E] Oral

S (Solid Earth Sciences ) » S-CG Complex & General

[S-CG62] Investigation of inputs to subduction zones: Influence of tectonic processes on the incoming plate

convener:Makoto Yamano(Earthquake Research Institute, the University of Tokyo), Tomoaki Morishita(School of Geoscience and Civil Engineering, College of Science and Technology, Kanazawa University), 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. Variation in inputs should significantly affect geophysical/geological phenomena around the plate interface and geochemical cycles in 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.

*Asuka Yamaguchi1, Hiroaki Kurano1, Rina Fukuchi2, Kazuno Arai3, Ken Ikehara4, Toshiya Kanamatsu5, Takanori Kagoshima1, Tomoko Hanyu6, Juichiro Ashi1, Jin-Oh Park1 (1.Atomosphere and Ocean Research Institute, The University of Tokyo, 2.DIA CONSULTANTS CO., Ltd., 3.Center for Advanced Marine Core Research, Kochi University, 4.National Institute of Advanced Industrial Science and Technology, 5.Japan Agency for Marine-Earth Science and Technology , 6.KOBEC, Kobe University)