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

Tue. May 23, 2017 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL7)

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.

[SCG67-P01] Insights on Structure and Deformation in the Input Section of the Sumatra Seismogenic Zone: Preliminary Results from International Ocean Discovery Program (IODP) Expedition 362

*Mari Hamahashi¹, Abby Kenigsberg², Yehua Shan³, Paola Vannucchi⁴, Peter Vrolijk⁵, Lisa McNeill⁶, Brandon Dugan⁷, Katerina Petronotis⁸, Jan Backman⁹, Sylvain Bourlange¹⁰, Farid Chemale¹¹, Wenhuang Chen³, Tobias Colson¹², Marina Frederik¹³, Gilles Guerin¹⁴, Timothy Henstock⁶, Brian House¹⁵, Andre Huepers¹⁶, Tamara Jeppson¹⁷, Sarah Kachovich¹⁸, Mebae Kuranaga¹⁹, Steffen Kutterolf²⁰, Kitty Milliken²¹, Freya Mitchison²², Hideki Mukoyoshi²³, Nisha Nair²⁴, Satoko Owari²⁵, Kevin Pickering²⁶, Hugo Pouderoux²⁷, Insun Song²⁸, Marta Torres²⁹, Tao Yang³⁰, Xixi Zhao³¹ (1.Earth Observatory of Singapore, Asian School of the Environment, Nanyang Technological University, 2.Pennsylvania State University, 3.Chinese Academy of Sciences, 4.Royal Holloway University of London, 5.New Mexico Tech, 6.University of Southampton, 7.Colorado School of Mines, 8.Texas A&M University, 9.Stockholm University, 10.Laboratoire GeoRessources, CNRS-Université de Lorraine-CREGU, 11.Universidade do Vale do Rio dos Sinos, 12.University of Western Australia, 13.Agency for the Assessment and Application of Technology (BPPT), 14.Lamont-Doherty Earth Observatory, Columbia University, 15.University of California, San Diego, 16.University of Bremen, 17.University of Wisconsin-Madison, 18.The University of Queensland, 19.Yamaguchi University, 20.GEOMAR, Helmholtz Center for Ocean Research Kiel, 21.Bureau of Economic Geology, 22.Cardiff University, 23.Shimane University, 24.Ministry of Earth Sciences, Government of India, 25.Chiba University, 26.University College London, 27.University de Rennes I, 28.Korea Institute of Geoscience & Mineral (KIGAM), 29.Oregon State University, 30.China Earthquake Administration, 31.University of California, Santa Cruz)

[SCG67-P02] Measurements of thermal conductivity of a basalt core sample retrieved from subducting oceanic crust in Nankai subduction zone under high temperature

*Weiren Lin^1,2, Osamu Tadai³, Masataka Kinoshita⁴, Jun Kameda⁵, Wataru Tanikawa², Takehiro Hirose², Yohei Hamada², Osamu Matsubayashi⁶ (1.Graduate School of Engineering, Kyoto University, 2.Kochi Institute for Core Sample research, Japan Agency for Marine-Earth Science and Technology, 3.Marin Works Japan LTD, 4.Earthquake Research Institute, The University of Tokyo, 5.Graduate School of Science, Hokkaido University, 6.Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology)

[SCG67-P03] Heat flow distribution along the Nankai Trough floor: Correlation with the structure of the incoming oceanic crust

*Makoto Yamano¹, Yoshifumi Kawada², Mikiya Yamashita³ (1.Earthq. Res. Inst., Univ. Tokyo, 2.IRIDeS, Tohoku Univ., 3.JAMSTEC)

[SCG67-P04] Along-trough variation in the seismic structure of the incoming Philippine Sea plate just seaward of the Nankai Trough

★Invited papers

*Ayako Nakanishi¹, Mikiya Yamashita¹, Yojiro Yamamoto¹, Gou Fujie¹, Seiichi Miura¹, Shuichi Kodaira¹, Yoshiyuki Kaneda², Nobukazu Seama³ (1.JAMSTEC, 2.Kagawa Univ., 3.Kobe Univ.)

[SCG67-P05] Crustal structure of the eastern Nankai Trough from Full Waveform Inversion of the dense Ocean Bottom Seismometers data

*Andrzej Górszczyk¹, Michal Malinowski¹, Stéphane Operto² (1.Institute of Geophysics, Polish Academy of Sciences, 2.Géoazur, CNRS, Université Nice Sophia Antipolis)

[SCG67-P06] Crustal structure beneath the eastern foot of the Japan Trench outer rise by airgun-OBS survey

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

[SCG67-P07] Seismic structure beneath the petit-spot area and its implications

*Gou Fujie¹, Shuichi Kodaira¹, Taro Shirai¹, Annke Dannowski², Martin Thorwart², Ingo Grevemeyer², Jason Phipps Morgan³, Seiichi Miura¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.GEOMAR, 3.Royal Hollowya Univ. of London)

[SCG67-P08] Towards electrical resistivity imaging around outer-rise bending normal faults off the Japan trench

*Hiroshi Ichihara^1,2, Takafumi Kasaya², Tada-nori Goto³, Kiyoshi Baba⁴, Makoto Yamano⁴ (1.Kobe University, 2.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3.Kyoto University, 4.the University of Tokyo)

[SCG67-P09] Effect of pore water on elastic wave velocity of serpentinites and implication for serpentinization at outer-rise region

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

Session information