JpGU Meeting 2018
Session outline| Solid Earth Sciences(S) | ||
|---|---|---|
| Session Sub-category | Complex & General | |
| Session ID | S-CG58 | |
| 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 Natural System, Colleage of Science and Technology, Kanazawa University | |
| Co-Convener 2 | Name | Gou Fujie |
| Affiliation | Japan Agency for Marine-Earth Science and Technology | |
| Session Language | EJ | |
| 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. 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 |
| |
| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 23 AM1 | ||||
| 09:00 - 09:15 | SCG58-01 | Fluid circulation through petit-spot volcanic knolls inferred from surface heat flow distribution | Makoto Yamano | Abstract |
| 09:15 - 09:30 | SCG58-02 | Heat and fluid transport among the petit-spot volcanoes seaward of the Japan Trench outer rise area: Flux estimation and numerical modeling | Yoshifumi Kawada | Abstract |
| 09:30 - 09:45 | SCG58-03 | Modification of the subducting plate by petit-spot volcanism: Impregnation of CO2-rich melt from the asthenosphere | Shiki Machida | Abstract |
| 09:45 - 10:00 | SCG58-04 | Magmatism at the Outer Rise and Impact of Subduction: SCORE/APL proposals for outer rise drilling | Asuka Yamaguchi | Abstract |
| 10:00 - 10:15 | SCG58-05 | Along-axis variation of the inputs to the Japan Trench subduction zone revealed from seismic imaging | Yasuyuki Nakamura | Abstract |
| 10:15 - 10:30 | SCG58-06 | Variation of oceanic sediment entering the Japan Trench and its implication for a co-seismic slip reaching the trench axis | Shuichi Kodaira | Abstract |
| Oral Presentation May 23 AM2 | ||||
| 10:45 - 11:00 | SCG58-07 | Distribution of Intra-plate seismicity in trench-outer rise region along the Japan Trench based on ocean bottom seismograph observations | Koichiro Obana | Abstract |
| 11:00 - 11:15 | SCG58-08 | Elastic wave velocity measurement of serpentinite toward quantitative evaluation of serpentinizaiton at outer-rise region | Kohei Hatakeyama | Abstract |
| 11:15 - 11:30 | SCG58-09 | Effect of a half-graben structure on formation of a shallow plate boundary fault in subduction zone with analog modelling | Hiroaki Koge | Abstract |
| 11:30 - 11:45 | SCG58-10 | Possible fluid effects on megathrust fault in the coseismic rupture zone of the 2011 Tohoku-oki earthquake | Jih-Hsin Chang | Abstract |
| 11:45 - 12:00 | SCG58-11 | Subduction zone input-output: Modeling of geochemical mass balance using the Arc Basalt Simulator version 5 | Jun-Ichi Kimura | Abstract |
| 12:00 - 12:15 | SCG58-12 | Effects of hydrous lithospheric mantle on deep water circulation and subduction zone dynamics | Atsushi Nakao | Abstract |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 23 Core Time | |||
| SCG58-P01 | Progress and perspective of drilling plans that elucidate modification of oceanic plate just prior to subduction | Tomoaki Morishita | Abstract |
| SCG58-P02 | Crustal structure in the outer-rise off the Japan Trench | Ryosuke Azuma | Abstract |
| SCG58-P03 | Bend faulting and a large seamount in the central Japan Trench | Gou Fujie | Abstract |
| SCG58-P04 | Resistivity structure of incoming Pacific Plate around the Outer-Rise Region, off Japan Trench | Shinya Sato | Abstract |
| SCG58-P05 | Regional distribution of the incoming sediments along the Nankai Trough and its implications for the megathrust fault behavior | Jin-Oh Park | Abstract |
| SCG58-P06 | IODP Expedition 375: Hikurangi Subduction Margin – first chronostratigraphic constraints derived from shipboard palaeomagnetic analyses | Annika Greve | Abstract |