Japan Geoscience Union Meeting 2015

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

[S-CG57] Structure, evolution and dynamics of mobile belts

Wed. May 27, 2015 4:15 PM - 6:00 PM A06 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Toru Takeshita(Department of Natural History Sciences, Graduate School of Science, Hokkaido University), Hiroshi Sato(Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo), Koichiro Obana(Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology), Takuya NISHIMURA(Disaster Prevention Research Institute, Kyoto University), Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), Aitaro Kato(Graduate School of Environmental Studies, Nagoya University), Jun Muto(Department of Earth Sciences, Tohoku University), Katsushi Sato(Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University), Shuichi Kodaira(Institute for Research on Earth Evolution Japan Agency for Marine-Earth Science and Technology), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Tatsuya Ishiyama(Earthquake Research Institute, University of Tokyo), Makoto MATSUBARA(National Research Institute for Earth Science and Disaster Prevention), Yasutaka Ikeda(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Chair:Bunichiro Shibazaki(International Institute of Seismology and Earthquake Engineering, Building Research Institute)

Since the targets of dynamics in mobile belts range from orogeny and the formation of large-scale faults which occur for several hundreds to thousands years to seismic and volcanic activities which occur during a lifetime of human being, the integration of geophysics, geology and geomorphology is necessary to reveal the essence. In order to reveal dynamics in mobile belts, it is required that the temporal and spatial development of stress field due to plate movement and rheological properties must be clarified. However, not only stress in the crust has not been known, but also the rheological properties characterized by elasto-visco-plastic materials, are very complex, which depend on the time scale and stress and temperature. Further, since the properties are greatly affected by fluids and reaction via fluids, petrological and geochemical approaches are also important for the clarification. Since changes in seismic activities and large-scale crustal movement have been occurring in the whole Japanese islands due to large changes of stress and strain fields since the great Tohoku-oki earthquake, the present time is best timing to work on these researches on dynamics in mobile belts. This session welcomes presentations from observational, experimental and modeling researches of different disciplines which aim at revealing the nature of dynamics in mobile belts, such as seismology, geodesy, tectonic geomorphology, structural geology, petrology, geofluids, etc.

4:15 PM - 4:30 PM

[SCG57-06] Lithospheric Structure of the Hidaka Collision Zone, Hokkaido, from Reanalysis of 1998-2000 Hokkaido Transect Data VI

*Takaya IWASAKI1, Noriko TSUMURA2, Tanio ITO3, Hiroshi SATO1, Eiji KURASHIMO1, Naoshi HIRATA1, Kazunori ARITA4, Katsuya NODA5, Akira FUJIWARA5, Susumu ABE5, Shinsuke KIKUCHI6, Kazuko SUZUKI7 (1.Earthquake Research Institute, the University of Tokyo, 2.Graduate School of Science, Chiba University, 3.Heisei Teikyo University, 4.The Hokkaido University Museum, Hokkaido University, 5.JGI, Inc., 6.JAPEX, 7.Schlumberger Ltd.)

4:30 PM - 4:45 PM

[SCG57-07] Crustal structure and fluid distribution beneath the southern Hidaka collision zone based on 3-D resistivity modeling

*Hiroshi ICHIHARA1, Toru MOGI2, Yusuke YAMAYA3, Takeshi HASHIMOTO2, Makoto UYESHIMA4, Yasuo OGAWA5 (1.Japan Agency for Marine-Earth Science and Technology, 2.Institute of Seismology and Volcanology, Hokkaido University, 3.Advanced Industrial Science and Technology, 4.Earthquake Research Institute, the University of tokyo, 5.Volcanic Fluid Researach Center, Tokyo Institute of Technology)

5:15 PM - 5:18 PM

[SCG57-P17] Detrital zircon chronology of the Upper Cretaceous Atokura Formation in northern Kanto Mtn., Japan

3-min talk in an oral session

*Hiroki NAKAHATA1, Yukio ISOZAKI2, Kazuo KOSAKA3, Shuhei SAKATA4, Takafumi HIRATA4 (1.Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo, 2.Department of Earth Science and Astronomy, The University of Tokyo, 3.Department of Geosystem Sciences, College of Humanities and Sciences, Nihon University, 4.Graduate school of Science, Kyoto University)

5:27 PM - 5:30 PM

[SCG57-P21] P-wave velocity structure at shallow depths around the northern limit of the 2011 Tohoku earthquake

3-min talk in an oral session

*Ken ISHIHARA1, Kimihiro MOCHIZUKI1, Tomoaki YAMADA1, Yusuke YAMASHITA1, Masanao SHINOHARA1, Ryosuke AZUMA2, Ryota HINO3, Toshinori SATO4, Yoshio MURAI5, Hiroshi YAKIWARA6 (1.Earthquake Research Institute, The University of Tokyo, 2.Recearch Center for Prediction of Earthquake and Volcanic Erupstion, Tohoku University, 3.International Research Institute of Disaster Science, Tohoku University, 4.Graduate School of Science, Chiba University, 5.Faculty of Science, Hokkaido University, 6.Faculty of Science, Kagoshima University)