[S-CG61] Dynamics in mobile belts

Tue. May 28, 2019 1:45 PM - 3:15 PM Convention Hall A (2F)

convener:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), Toru Takeshita(Department of Natural History Sciences, Graduate School of Science, Hokkaido University), Hikaru Iwamori(Geochemical Evolution Research Program, Japan Agency for Marine-Earth Science and Technology), Chairperson:Naoki Uchida, Takeshi Iinuma

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 through 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 hydrology, as well as interdisciplinary studies, that relate to the dynamic behaviours of mobile belts.

+Add all to schedule

1:45 PM - 2:00 PM

[SCG61-25] Revisiting the Forearc Sliver Scenario Along the Southern Kurile Trench to Reconcile Interdisciplinary Observations

*Yuji ITOH¹, Kelin WANG², Takuya NISHIMURA³ (1.Graduate School of Science, Kyoto University, 2.Pacific Geoscience Centre, Geological Survey of Canada, 3.Disaster Prevention Research Institute, Kyoto University)

2:00 PM - 2:15 PM

[SCG61-26] Segmentation of crustal deformation area within the Sanriku coast, northeast Japan, on the basis of spatial distribution of millennial-scale crustal movements

*Yuichi Niwa¹ (1.Faculty of Science and Engineering, Chuo University)

2:15 PM - 2:30 PM

[SCG61-27] Shear wave splitting east off NE Japan based on the S-net data

*Naoki Uchida¹, Junichi Nakajima², Ryota Takagi¹, Keisuke Yoshida¹, Takashi NAKAYAMA¹, Ryota Hino¹, Tomomi Okada¹, Youichi Asano³, Sachiko Tanaka³ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions Graduate School of Science, Tohoku University, 2.Department of Earth and Planetary Sciences, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo, 3.National Research Institute for Earth Science and Disaster Resilience)

2:30 PM - 2:45 PM

[SCG61-28] Gravity anomaly due to active faults and crustal rheology in the northeastern Japan arc inferred by fault dislocation model

*Mitsuhiro Hirano¹, Hiroyuki Nagahama¹, Jun Muto¹ (1.tohoku university)

2:45 PM - 3:00 PM

[SCG61-29] On the temporal decay of the localized strain rate in the Tohoku region after the Tohoku-Oki earthquake

*Youichiro Takada¹, Tomomi Inamatsu² (1.Faculty of Science, Hokkaido University, 2.Dept. Natural History Sciences, Hokkaido University)

3:00 PM - 3:15 PM

[SCG61-30] Revisiting the Coseismic Slip Distribution of the 2011 Tohoku-oki Earthquake Considering Early Postseismic Deformation, Non-linear Viscoelasticity, and Heterogeneous Structure

*Takeshi Iinuma¹, Ryoichiro Agata¹, Yusaku Ohta², Ryota Hino², Takane Hori¹ (1.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2.Graduate School of Science, Tohoku University)

Session information