[S-CG62] [EE] Dynamics in mobile belts

Tue. May 23, 2017 10:45 AM - 12:15 PM Convention Hall B (International Conference Hall 2F)

convener:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), Robert Holdsworth(Durham University), Jeanne Hardebeck(USGS), Hikaru Iwamori(Geochemical Evolution Research Program, Japan Agency for Marine-Earth Science and Technology), Chairperson:Toru Takeshita(Department of Natural History Sciences, Graduate School of Science, Hokkaido University), Chairperson:Takamoto Okudaira(Department of Geosciences, Graduate School of Science, Osaka City University)

The dynamic behaviours 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 due to plate motion and other causes, which are connected though the rheological properties of the materials. To understand the full physical system, an integration of geophysics, geomorphology, and geology is necessary, as is the integration of observational, theoretical and experimental approaches. In addition, because rheological properties are greatly affected by fluids in the crust and fluid chemical reactions, petrological and geochemical approaches are also important. 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, and geofluids, as well as interdisciplinary studies, that relate to the dynamic behaviour of mobile belts.

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10:45 AM - 11:00 AM

[SCG62-06] Heterogenous quartz LPO development and strain partitioning in Median Tectonic Line mylonites

★Invited papers

*Thomas Anthony Czertowicz¹, Toru Takeshita¹, Norio Shigematsu², Koichiro Fujimoto³, Shun Arai¹ (1.Hokkaido Univ., 2.Geological Survey of Japan, 3.Tokyo Gakugei Univ.)

11:00 AM - 11:15 AM

[SCG62-07] Structural development of cataclasite zones associated with large-scale faulting: an example of the Median Tectonic Line

*Shun Arai¹, Toru Takeshita¹ (1.Department of Natural History Sciences, Graduate School of Science, Hokkaido University)

11:15 AM - 11:30 AM

[SCG62-08] Fault rocks and paleostress fields in the San-in shear zone

*Hideto Uchida¹, Hideki Mukoyoshi¹, Kenta Kobayashi², Tetsuro Hirono³ (1.the Earth Resource Environment department,Shimane University, 2.Department of Geology, Faculty of Science, Niigata University, 3.Department of Earth and Space Science, Graduate School of Science Osaka University)

11:30 AM - 11:45 AM

[SCG62-09] Controlling factors and modelling of reaction-induced stress and strain during water–rock reactions: Experimental investigation in CaSO₄–H₂O system

*Masaoki Uno¹, Atsushi Okamoto¹, Noriyoshi Tsuchiya¹ (1.Graduate School of Environmental Studies, Tohoku University)

11:45 AM - 12:00 PM

[SCG62-10] Percolation of open grain boundaries and electrical conductivity in fluid-bearing rocks

*Tohru Watanabe¹, miho makimura¹, Yohei Kaiwa¹ (1.Gradudate School of Science and Engineering, University of Toyama)

12:00 PM - 12:15 PM

[SCG62-11] Northward lateral cooling of the Himalayan metamorphic nappe in central and eastern Nepal, and uplifting rate of the Everest Massif

*Harutaka Sakai¹, Saori Hirabayashi¹, Toru Nakajima¹, Hideki Iwano², Tohru Danhara² (1.Department of Geology and Mineralogy Division of Earth and Planetary Sciences, Graduate School of Science Kyoto University, 2.Kyoto Fission-Track Co. Ltd.)