JpGU Meeting 2018
Session outline| Solid Earth Sciences(S) | ||
|---|---|---|
| Session Sub-category | Seismology | |
| Session ID | S-SS04 | |
| Title | Nankai Trough Seismogenic Zone Experiment toward the final challenge | |
| Short Title | NanTroSEIZE toward the final challenge | |
| Main Convener | Name | Kyuichi Kanagawa |
| Affiliation | Graduate School of Science, Chiba University | |
| Co-Convener 1 | Name | Gregory F Moore |
| Affiliation | University of Hawaii at Manoa | |
| Co-Convener 2 | Name | Masataka Kinoshita |
| Affiliation | Earthquake Research Institute, University of Tokyo | |
| Co-Convener 3 | Name | Keir Becker |
| Affiliation | University of Miami | |
| Session Language | EE | |
| Scope | The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is a multidisciplinary investigation of fault mechanics and seismogenesis along the megathrust at the Nankai Trough subduction zone, and includes reflection and refraction seismic imaging, direct sampling by drilling, in situ measurements, and long-term monitoring in conjunction with laboratory and numerical modeling studies. During the past 11 IODP expeditions off Kii Peninsula since 2007, 15 sites have been drilled by D/V "Chikyu" down to depths from 100s of meters to more than 3000 meters below seafloor, where the inner and outer wedge of the Nankai margin has been sampled extensively, and two state-of-the-art real-time downhole observatories are now in operation. NanTroSEIZE is now at the final stage with only two more expeditions planned for another downhole observatory installation at the toe site in early 2018, and for resuming riser drilling toward the megathrust at ~5200 meters below seafloor starting from late 2018. In this session jointly held with AOGS, we expect presentations on scientific outcomes from the NanTroSEIZE project and discussions toward the final challenge. We welcome presentations on, but are not limited to, seismic imaging, borehole logging and monitoring, chemical analyses of pore water and mud gas, lithology, structures, physical properties and laboratory experiments of cuttings and core samples, and theoretical and numerical modeling. | |
| Presentation Format | Oral and Poster presentation | |
| Joint Session with | AOGS | |
| Invited Authors |
| |
| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 22 AM1 | ||||
| 09:00 - 09:15 | SSS04-01 | Nankai Trough seismogenic zone structures revealed by improved 3D seismic images | Kazuya Shiraishi | Abstract |
| 09:15 - 09:30 | SSS04-02 | Geometrical Dependence on the Stress and Slip Tendency Acting on the Subduction Megathrust of Nankai Seismogenic Zone Off Kumano | Masataka Kinoshita | Abstract |
| 09:30 - 09:45 | SSS04-03 | Natural fractures and stress state analysis from Nankai Trough wells’ logging data | Nikita Dubinya | Abstract |
| 09:45 - 10:00 | SSS04-04 | Stress condition during rupture propagation as new index for fault characterization | Arito Sakaguchi | Abstract |
| 10:00 - 10:15 | SSS04-05 | Limited changes of pore fluid pressure during seismic cycles around megasplay faults in subduction zones | Makoto Otsubo | Abstract |
| 10:15 - 10:30 | SSS04-06 | Geological evidence of postseismic fluid discharge along an fossilized megasplay fault | Asuka Yamaguchi | Abstract |
| Oral Presentation May 22 AM2 | ||||
| 10:45 - 11:00 | SSS04-07 | The Nankai Trough Seismogenic Zone Experiment: Highlights from the World of Sedimentology and Lithostratigraphy | Michael Underwood | Abstract |
| 11:00 - 11:15 | SSS04-08 | Multiscale landsliding in the Nankai Trough accretionary prism | Gregory F Moore | Abstract |
| 11:15 - 11:30 | SSS04-09 | Submarine mass movements: From accretionary prism evolution and climate preconditiong to paleoseismologic implications | Michael Strasser | Abstract |
| 11:30 - 11:45 | SSS04-10 | Initial Results of IODP NanTroSEIZE Expedition 380: Borehole Observatory Installation at the Frontal Thrust of the Nankai Prism | Masataka Kinoshita | Abstract |
| 11:45 - 12:00 | SSS04-11 | Real-time monitoring of stress accumulations by the borehole strainmeters in the Nankai trough seismogenic zone, and initial strain data of the C0006 observatory | Yuya Machida | Abstract |
| 12:00 - 12:15 | SSS04-12 | Real-time monitoring of seismic and geodetic activities by long term borehole monitoring system in the Nankai Trough subduction zone | Toshinori Kimura | Abstract |
| Oral Presentation May 22 PM1 | ||||
| 13:45 - 14:00 | SSS04-13 | Recall the past to address future scientific challenges from legacy data to advance understanding of seisimogenic subduction zone: An IODP workshop Core-Log-Seismic investigation at Sea | Rina Fukuchi | Abstract |
| 14:00 - 14:15 | SSS04-14 | Micro-tectonics of the tsunamigenic frontal thrust in the Nankai Trough | Gaku Kimura | Abstract |
| 14:15 - 14:30 | SSS04-15 | Outline of the large structure drilled at Site C0002 based on the interpretation of logging while drilling (LWD) images and geophysical log response. | Maria Jose Jurado | Abstract |
| 14:30 - 14:45 | SSS04-16 | Deep processes in the Nankai accretionary prism from geochemical constraints, IODP Site C0002 | James C Sample | Abstract |
| 14:45 - 15:00 | SSS04-17 | IODP Expedition 358: The Final(?) Megathrust Drilling Challenge for NanTroSEIZE | Harold Tobin | Abstract |
| 15:00 - 15:15 | SSS04-18 | Discussion toward the final challenge of the Nankai Trough Seismogenic Zone Experiment | Kyuichi Kanagawa | Abstract |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 22 Core Time | |||
| SSS04-P01 | Offshore receiver function imaging of the Philippine Sea Plate in the Nankai subduction zone | Takashi Tonegawa | Abstract |
| SSS04-P02 | Geometry of protothrust zone along the Nankai Trough revealed by red relief image mapping and seismic reflection survey | Mikiya Yamashita | Abstract |
| SSS04-P03 | Comparison of volcanic glasses from tephra deposits frontal prism and incoming sediments | Rina Fukuchi | Abstract |
| SSS04-P04 | Compiling physical property data obtained through NanTroSEIZE project | Suguru Yabe | Abstract |
| SSS04-P05 | Frictional properties of accretionary sediments/rocks and their implications for the transition of aseismic to seismic faulting at the Nankai Trough Subduction Zone | Kyuichi Kanagawa | Abstract |
| SSS04-P06 | Frictional properties of incoming sediments/rocks at shallow conditions of the Japan Trench subduction zone | Kyuichi Kanagawa | Abstract |
| SSS04-P07 | Relation of maturity of carbonaceous materials to friction coefficient | Shunya Kaneki | Abstract |
| SSS04-P08 | Postseismic fluid discharge chemically recorded in altered pseudotachylyte discovered from an ancient megasplay fault | Hasegawa Ryota | Abstract |
| SSS04-P09 | Chemical characteristics and source of the fluid involved in the black fault rocks in the Kodiak accretionary complex | Tsuyoshi Ishikawa | Abstract |