固体地球科学(S)
セッション小記号地震学
セッションIDS-SS04
タイトル和文Nankai Trough Seismogenic Zone Experiment toward the final challenge
英文Nankai Trough Seismogenic Zone Experiment toward the final challenge
タイトル短縮名和文NanTroSEIZE toward the final challenge
英文NanTroSEIZE toward the final challenge
代表コンビーナ氏名和文金川 久一
英文Kyuichi Kanagawa
所属和文千葉大学大学院理学研究科
英文Graduate School of Science, Chiba University
共同コンビーナ 1氏名和文Gregory F Moore
英文Gregory F Moore
所属和文University of Hawaii at Manoa
英文University of Hawaii at Manoa
共同コンビーナ 2氏名和文木下 正高
英文Masataka Kinoshita
所属和文東京大学地震研究所
英文Earthquake Research Institute, University of Tokyo
共同コンビーナ 3氏名和文Keir Becker
英文Keir Becker
所属和文University of Miami
英文University of Miami
発表言語EE
スコープ和文
英文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.
発表方法口頭および（または）ポスターセッション
ジョイントセッションAOGS
招待講演
  • 白石 和也 (海洋研究開発機構 海洋掘削科学センター)
  • 山口 飛鳥 (東京大学大気海洋研究所)
  • Michael Underwood (New Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorro, NM USA)
  • Michael Strasser (University of Innsbruck)
  • James C Sample (School of Earth Sciences and Enviromental Sciences, N. Arizona Univ, Flagstaff, Arizona, USA)
  • Harold Tobin (Department of Geoscience, University of Wisconsin-Madison)
時間 講演番号 タイトル 発表者 予稿原稿
口頭発表 5月22日 AM1
09:00 - 09:15 SSS04-01Nankai Trough seismogenic zone structures revealed by improved 3D seismic images白石 和也予稿
09:15 - 09:30 SSS04-02Geometrical Dependence on the Stress and Slip Tendency Acting on the Subduction Megathrust of Nankai Seismogenic Zone Off Kumano木下 正高予稿
09:30 - 09:45 SSS04-03Natural fractures and stress state analysis from Nankai Trough wells’ logging dataNikita Dubinya予稿
09:45 - 10:00 SSS04-04Stress condition during rupture propagation as new index for fault characterization坂口 有人予稿
10:00 - 10:15 SSS04-05Limited changes of pore fluid pressure during seismic cycles around megasplay faults in subduction zones大坪 誠予稿
10:15 - 10:30 SSS04-06Geological evidence of postseismic fluid discharge along an fossilized megasplay fault山口 飛鳥予稿
口頭発表 5月22日 AM2
10:45 - 11:00 SSS04-07The Nankai Trough Seismogenic Zone Experiment: Highlights from the World of Sedimentology and LithostratigraphyMichael Underwood予稿
11:00 - 11:15 SSS04-08Multiscale landsliding in the Nankai Trough accretionary prismGregory F Moore予稿
11:15 - 11:30 SSS04-09Submarine mass movements: From accretionary prism evolution and climate preconditiong to paleoseismologic implicationsMichael Strasser予稿
11:30 - 11:45 SSS04-10Initial Results of IODP NanTroSEIZE Expedition 380: Borehole Observatory Installation at the Frontal Thrust of the Nankai Prism木下 正高予稿
11:45 - 12:00 SSS04-11Real-time monitoring of stress accumulations by the borehole strainmeters in the Nankai trough seismogenic zone, and initial strain data of the C0006 observatory町田 祐弥予稿
12:00 - 12:15 SSS04-12Real-time monitoring of seismic and geodetic activities by long term borehole monitoring system in the Nankai Trough subduction zone木村 俊則予稿
口頭発表 5月22日 PM1
13:45 - 14:00 SSS04-13Recall 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福地 里菜予稿
14:00 - 14:15 SSS04-14Micro-tectonics of the tsunamigenic frontal thrust in the Nankai Trough木村 学予稿
14:15 - 14:30 SSS04-15Outline 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予稿
14:30 - 14:45 SSS04-16Deep processes in the Nankai accretionary prism from geochemical constraints, IODP Site C0002James C Sample予稿
14:45 - 15:00 SSS04-17IODP Expedition 358: The Final(?) Megathrust Drilling Challenge for NanTroSEIZEHarold Tobin予稿
15:00 - 15:15 SSS04-18Discussion toward the final challenge of the Nankai Trough Seismogenic Zone Experiment金川 久一予稿
講演番号 タイトル 発表者 予稿原稿
ポスター発表 5月22日 コア
SSS04-P01 Offshore receiver function imaging of the Philippine Sea Plate in the Nankai subduction zone 利根川 貴志 予稿
SSS04-P02 Geometry of protothrust zone along the Nankai Trough revealed by red relief image mapping and seismic reflection survey 山下 幹也 予稿
SSS04-P03 Comparison of volcanic glasses from tephra deposits frontal prism and incoming sediments 福地 里菜 予稿
SSS04-P04 Compiling physical property data obtained through NanTroSEIZE project 矢部 優 予稿
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 金川 久一 予稿
SSS04-P06 Frictional properties of incoming sediments/rocks at shallow conditions of the Japan Trench subduction zone 金川 久一 予稿
SSS04-P07 炭質物における熟成度と摩擦係数の関係 金木 俊也 予稿
SSS04-P08 Postseismic fluid discharge chemically recorded in altered pseudotachylyte discovered from an ancient megasplay fault 長谷川 亮太 予稿
SSS04-P09 Chemical characteristics and source of the fluid involved in the black fault rocks in the Kodiak accretionary complex 石川 剛志 予稿