Japan Geoscience Union Meeting 2022

Session information

[J] Oral

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

[S-CG52] Dynamics in mobile belts

Fri. May 27, 2022 10:45 AM - 12:15 PM 301A (International Conference Hall, Makuhari Messe)

convener:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), convener:Hikaru Iwamori(Earthquake Research Institute, The University of Tokyo), Kiyokazu Oohashi(Graduate School of Sciences and Technology for Innovation, Yamaguchi University), Chairperson:Kiyokazu Oohashi(Graduate School of Sciences and Technology for Innovation, Yamaguchi University), Tomomi Okada(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

The dynamic behaviors of mobile belts are expressed across a wide range of time scales, from the seismic and volcanic events that impact society during our lifetimes, to orogeny and the formation of large-scale fault systems which can take place over millions of years. Deformation occurs on length scales from microscopic fracture and flow to macroscopic deformation to plate-scale tectonics. To gain a physical understanding of the dynamics of mobile belts, we must determine the relationships between deformation and the driving stresses associated with plate motion and other causes, which are connected through the rheological properties of the materials. To understand the full physical system, an integration of geophysics, geomorphology, geology, petrology, and geochemistry is necessary, as is the integration of observational, theoretical and experimental approaches. In particular, rheological properties, which are physically affected by fluids in the crust and chemical reactions assisted by fluids, can be resolved only through such an interdisciplinary approach. After the 2011 great Tohoku-oki earthquake, large-scale changes in seismic activity and regional scale crustal deformation were observed, making present-day Japan a unique natural laboratory for the study of the dynamics of mobile belts. This session welcomes presentations from different disciplines, such as seismology, geodesy, tectonic geomorphology, structural geology, petrology, geochemistry and hydrology, as well as interdisciplinary studies, that relate to the dynamic behaviors of mobile belts.

11:00 AM - 11:15 AM

*Yoshiya Usui1, Makoto Uyeshima1, Hideaki Hase2, Hiroshi Ichihara3, Koki Aizawa4, Takao Koyama1, Shin'ya Sakanaka5, Tsutomu Ogawa1, Yusuke Yamaya6, Tadashi Nishitani5, Koichi Asamori7, Yasuo Ogawa8, Ryokei Yoshimura9, Shinichi Takakura10, Masaaki Mishina11, Yuichi Morita12 (1.Earthquake Research Institute, the University of Tokyo, 2.Geothermal Energy Research & Development Co., Ltd., 3.Graduate School of Environmental Studies, Nagoya University, 4.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 5.Faculty of Engineering and Resource Science, Akita University, 6.Renewable Energy Research Center, Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, 7.Tono Geoscience Center, Japan Atomic Energy Agency, 8.Volcanic Fluid Research Center, Tokyo Institute of Technology, 9.Disaster Prevention Research Institute, Kyoto University, 10.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 11.Graduate School of Science, Tohoku University, 12.Center for Integrated Volcano Research, National Research Institute for Earth Science and Disaster Resilience)

11:15 AM - 11:30 AM

Tatsuya Mizuta1, *Tomomi Okada1, Martha Savage2, Ryota Takagi1, Keisuke Yoshida1, Shinichi Sakai3, Kei Katsumata4, Mako Ohzono4,3, Masahiro Kosuga5, Takuto Maeda5, Yoshiko Yamanaka6, Hiroshi Katao7, Takeshi Matsushima8, Hiroshi Yakiwara9, Takashi NAKAYAMA1, Satoshi Hirahara1, Toshio Kono1, Toru Matsuzawa1, Group for the aftershock observations of the 2011 off the Pacific coast of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Victoria University of Wellington, 3.ERI, University of Tokyo, 4.Hokkaido University, 5.Hirosaki University , 6.Nagoya University, 7.DPRI, Kyoto University, 8.Kyushu University, 9.Kagoshima University)

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