JpGU Meeting 2019
Session outline| Solid Earth Sciences (S) | ||
|---|---|---|
| Session Sub-category | Complex & General(CG) | |
| Session ID | S-CG60 | |
| Title | Investigation of inputs to subduction zones: Influence of tectonic processes on the incoming plate | |
| Short Title | Inputs to subduction zones | |
| Main Convener | Name | Makoto Yamano |
| Affiliation | Earthquake Research Institute, the University of Tokyo | |
| Co-Convener 1 | Name | Tomoaki Morishita |
| Affiliation | School of Geoscience and Civil Engineering, College of Science and Technology, Kanazawa University | |
| Co-Convener 2 | Name | Gou Fujie |
| Affiliation | Japan Agency for Marine-Earth Science and Technology | |
| Session Language | J | |
| Scope | 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. Variation in inputs should significantly affect geophysical/geological phenomena around the plate interface and geochemical cycles in 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. | |
| Presentation Format | Oral and Poster presentation | |
| Invited Authors | Saeko Kita (International Institute of Seismology and Earthquake Engineering, BRI) Kiichiro Kawamura (Yamaguchi University) Ken-ichi Hirauchi (Department of Geosciences, Faculty of Science, Shizuoka University) | |
| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 27 AM2 | ||||
| 10:45 - 11:00 | SCG60-01 | Geophysical-petrological studies of the Chile triple junction and their significance: MIRAI research cruise MR-1806Leg2 | Masataka Kinoshita | |
| 11:00 - 11:15 | SCG60-02 | Heat flow measurement on the seaward side of the Kuril Trench off Hokkaido | Kouta Sasaki | |
| 11:15 - 11:30 | SCG60-03 | Comparison of experimental and intermediate-depth earthquake b-value: difference in hydration degree of the oceanic mantle between Tohoku and Hokkaido | Saeko Kita | |
| 11:30 - 11:45 | SCG60-04 | Variations in bend faulting and the nature of the incoming oceanic plate off northeast Japan arc | Gou Fujie | |
| 11:45 - 12:00 | SCG60-05 | Seismicity in the trench-outer rise region off Fukushima and Ibaraki, southern Japan Trench | Koichiro Obana | |
| 12:00 - 12:15 | SCG60-06 | Influence of water–rock interactions on the strength of outer-rise faults | Ken-ichi Hirauchi | |
| Oral Presentation May 27 PM1 | ||||
| 13:45 - 14:00 | SCG60-07 | Seismic image of the incoming oceanic crust entering the central part of the Japan Trench: structural variation caused by petite-spot, bend fault and seamount | Shuichi Kodaira | |
| 14:00 - 14:15 | SCG60-08 | Dependence of calculation parameters on tsunami height from the outer-rise earthquakes | Toshitaka Baba | |
| 14:15 - 14:30 | SCG60-09 | Bathymetry data analysis and multi-channel seismic reflection survey in the 1933 Sanriku earthquake (Mw 8.4) rupture region | Tomoko Hanyu | |
| 14:30 - 14:45 | SCG60-10 | Sedimentation process and deformation process before sinking of sediment on oceanic plate: examples in northwest Pacific Ocean and Sumatra | Kiichiro Kawamura | |
| 14:45 - 15:00 | SCG60-11 | Exploring more asthenospheric melt: the preliminary report of KS-18-9 cruise, R/V Shinseimaru | Naoto Hirano | |
| 15:00 - 15:15 | SCG60-12 | Inputs of Argon on oceanic plate at subduction zones | Shigeaki Ono | |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 27 PM2 | |||
| SCG60-P01 | Tsunami Simulations of the 2006 and 2007 Kuril Earthquakes | Keiji Akai | |
| SCG60-P02 | The variation of seismic attributes about incoming oceanic crust in Nankai Trough using multi-channel seismic reflection data | Mikiya Yamashita | |
| SCG60-P03 | Bending-Related Topographic Structures of the Subducting Plate in the Southeastern Pacific Ocean | Reno Kotate | |
| SCG60-P04 | Detailed tectonic structure of the Japan Trench subduction zone off Miyagi by 2D pre-stack depth migration imaging | GUO CHEN | |
| SCG60-P05 | Conductive zone of incoming Pacific Plate in the outer rise region off Japan trench | Shinya Sato | |
| SCG60-P06 | Geochemical variations of the asthenosphere inferred from the geochemistry of petit-spot lavas in the NW Pacific plate | Yuki Katsuragi | |