海山アスペリティ/海山クリープ仮説の地質学的検証

• Project Area: Crustal dynamics-Unified understanding of intraisland deformation after the great Tohoku-oki earthquake-
• Project/Area Number: 17H05312
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: 山口 飛鳥 東京大学, 大気海洋研究所, 准教授 (30570634)
• Project Period (FY): 2017-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 海山 / 南海トラフ / 砂箱実験 / アスペリティ / 地震 / 付加体 / 沈み込み帯 / 応力

Outline of Annual Research Achievements

（１）美濃帯舟伏山ユニットにおいて、海山起源と推定されるスラストシートの地質調査および構造記載を行った。その結果、海山の下底部には変質玄武岩と泥質岩が混在する片状カタクレーサイトが分布することが判明した。断層岩、方解石脈およびカタクレーサイト中の石灰岩ブロックについて薄片を作成し、変形微細構造について検討した結果、地震性すべりを示唆する変形構造は確認されなかった。
（２）ODP第190次航海において南海トラフ室戸沖の1175地点、1176地点から採取された掘削コアの火山灰を用いて年代分析を行い、斜面堆積盆の形成史を復元した。その結果、室戸沖南海トラフでは約100万年前から分岐断層の活動が顕著になり、その結果として分岐断層上盤で堆積盆が成長したことが判明した。分岐断層が形成されるタイミングは、プレート運動から復元される海山沈み込みの時期と良い一致を示すことが示唆された。
（３）大気海洋研究所に既設の砂箱実験装置を改良して砂箱表面の粒子解析を行うとともに、海山の沈み込みとその側方変化を再現する砂箱実験を行った。海山表面の摩擦が強い実験条件では、プレート境界上盤の付加体に強い圧縮が働き、テイパー角が増加するが、海山の影響を受けない領域では変形が前縁の衝上断層にジャンプすることが判明した。今後、海山表面の摩擦が弱い状態での実験を行い、プレート境界断層の形状と摩擦の双方の観点からプレート境界上盤の変形を復元する予定である。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Universite d'Orleans(France)
• [Int'l Joint Research] Penn State University(米国)
• [Journal Article] Indian Monsoonal Variations During the Past 80?Kyr Recorded in NGHP-02 Hole 19B, Western Bay of Bengal: Implications From Chemical and Mineral Properties (2019)
  • Author(s): Ota Yuki、Kawahata Hodaka、Kuroda Junichiro、Yamaguchi Asuka、et al.
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 20 Issue: 1 Pages: 148-165
  • DOI: 10.1029/2018gc007772
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evaluation from otolith Sr stable isotope ratios of possible juvenile growth areas of Japanese eels collected from the West Mariana Ridge spawning area (2019)
  • Author(s): Otake Tsuguo、Amano Yosuke、Shirai Kotaro、Mochioka Noritaka、Takahashi Toshiro、Chow Seinen、Kurogi Hiroaki、Dou Shouzeng、Yamaguchi Asuka、Tsukamoto Katsumi
  • Journal Title: Fisheries Science Volume: 85 Issue: 3 Pages: 483-493
  • DOI: 10.1007/s12562-019-01304-4
  • NAID: 40021882589
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Monsoon-influenced variations in plankton community structure and upper-water column stratification in the western Bay of Bengal during the past 80?ky (2019)
  • Author(s): Ota Yuki、Kuroda Junichiro、Yamaguchi Asuka、Suzuki Atsushi、Araoka Daisuke、Ishimura Toyoho、Kawahata Hodaka
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 521 Pages: 138-150
  • DOI: 10.1016/j.palaeo.2019.02.020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Distributed deformation along the subduction plate interface: The role of tectonic m?langes (2019)
  • Author(s): Raimbourg Hugues、Famin Vincent、Palazzin Giulia、Yamaguchi Asuka、Augier Romain、Kitamura Yujin、Sakaguchi Arito
  • Journal Title: Lithos Volume: 334-335 Pages: 69-87
  • DOI: 10.1016/j.lithos.2019.01.033
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fluid properties and dynamics along the seismogenic plate interface (2018)
  • Author(s): Raimbourg Hugues、Famin Vincent、Palazzin Giulia、Mayoux Mathieu、Jolivet Laurent、Ramboz Claire、Yamaguchi Asuka
  • Journal Title: Geosphere Volume: 14 Issue: 2 Pages: 469-491
  • DOI: 10.1130/ges01504.1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for surface sediment remobilization by earthquakes in the Nankai forearc region from sedimentary records (2018)
  • Author(s): Natsumi Okutsu, Juichiro Ashi, Asuka Yamaguchi, Tomohisa Irino, Ken Ikehara, Toshiya Kanamatsu, Yusuke Suganuma and Masafumi Murayama
  • Journal Title: Subaqueous Mass Movements. Geological Society, London, Special Publications Volume: 477 Issue: 1 Pages: 22-22
  • DOI: 10.1144/sp477.22
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three-dimensional texture of natural pseudotachylyte: pseudotachylyte formation mechanism in hydrous accretionary complex (2018)
  • Author(s): Hamada, Y., G. Kimura, J. Kameda, A. Yamaguchi, M. Hamahashi, R. Fukuchi, Y. Kitamura, and S. Okamoto
  • Journal Title: Island Arc Volume: 27:e12241 Issue: 2 Pages: 1-12
  • DOI: 10.1111/iar.12241
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Upper-plate tectonic hysteresis and segmentation of the rupture area during seismogenesis in subduction zones?A case study of the Nankai Trough (2018)
  • Author(s): Kimura Gaku、Yamaguchi Asuka、Masataka Kinoshita
  • Journal Title: Geological Society of America Special Paper Volume: 534 Pages: 87-99
  • DOI: 10.1130/2018.2534(05)
  • ISBN: 9780813725345, 9780813795348
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dynamic formation process of thick deformation zone on the shallow plate boundary fault of the Japan Trench: insight from analog experiments of half-graben subduction (2018)
  • Author(s): Koge Hiroaki、Yamada Yasuhiro、Ohde Akihiro、Bauville Arthur、Yamaguchi Asuka、Ashi Juichiro
  • Journal Title: Progress in Earth and Planetary Science Volume: 5 Issue: 1 Pages: 69-69
  • DOI: 10.1186/s40645-018-0230-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spatial variability in sediment lithology and sedimentary processes along the Japan Trench : use of deep-sea turbidite records to reconstruct past large earthquakes (2017)
  • Author(s): Ikehara, K., K. Usami, T. Kanamatsu, K. Arai, A. Yamaguchi and R. Fukuchi
  • Journal Title: In Scourse, E. M., Chapman, N. A., Tappin, D. R. & Wallis, S. R. (eds) Tsunamis : Geology, Hazards and Risks. Geological Society, London, Special Publications, 456. Volume: 456 Issue: 1 Pages: 75-89
  • DOI: 10.1144/sp456.9
  • Description: 印刷中
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Temporal stress variations along a seismogenic megasplay fault in the subduction zone: An example from the Nobeoka Thrust, southwestern Japan (2017)
  • Author(s): Kawasaki Ryoji、Hamahashi Mari、Hashimoto Yoshitaka、Otsubo Makoto、Yamaguchi Asuka、Kitamura Yujin、Kameda Jun、Hamada Yohei、Fukuchi Rina、Kimura Gaku
  • Journal Title: Island Arc Volume: 26 Issue: 3 Pages: 1-11
  • DOI: 10.1111/iar.12193
  • Peer Reviewed / Open Access
• [Journal Article] Acoustic properties of deformed rocks at the Nobeoka Megathrust in the Shimanto Belt, Kyushu, Southwest Japan. (2017)
  • Author(s): Hashimoto, Y., Abe, S., Tano, H., Hamahashi, M., Saito, S., Kimura, G., Yamaguchi, A., Fukuchi, R., Kameda, J., Hamada, Y., Kitamura, Y., Fujimoto, K., Hina, S., Eida, M.
  • Journal Title: Island Arc Volume: e12198 Issue: 4 Pages: 1-10
  • DOI: 10.1111/iar.12198
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Opal-CT in chert beneath the toe of the tohoku margin and its influence on the seismic aseismic transition in subduction zones (2017)
  • Author(s): Kameda, J., Okamoto, A., Sato, K., Fujimoto, K., Yamaguchi, A., Kimura, G.
  • Journal Title: Geophysical research Letters Volume: 44 Issue: 2 Pages: 687-693
  • DOI: 10.1002/2016gl071784
  • NAID: 120006329012
  • Peer Reviewed / Open Access
• [Journal Article] Alteration and dehydration of subducting oceanic crust within subduction zones: implications for decollement step-down and plate boundary seismogenesis (2017)
  • Author(s): Jun Kameda, Sayako Inoue, Wataru Tanikawa, Asuka Yamaguchi, Yohei Hamada, Yoshitaka Hashimoto and Gaku Kimura
  • Journal Title: Earth, Planets and Space Volume: 69 Issue: 1 Pages: 52-52
  • DOI: 10.1186/s40623-017-0635-1
  • NAID: 120006333808
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Tertiary evolution of the Shimanto belt (Japan): A large-scale collision in Early Miocene (2017)
  • Author(s): Raimbourg Hugues、Famin Vincent、Palazzin Giulia、Yamaguchi Asuka、Augier Romain
  • Journal Title: Tectonics Volume: 36 Issue: 7 Pages: 1317-1337
  • DOI: 10.1002/2017tc004529
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Paleothermal structure of the Nankai inner accretionary wedge estimated from vitrinite reflectance of cuttings (2017)
  • Author(s): Fukuchi Rina、Yamaguchi Asuka、Yamamoto Yuzuru、Ashi Juichiro
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 18 Issue: 8 Pages: 3185-3196
  • DOI: 10.1002/2017gc006928
  • Peer Reviewed / Open Access
• [Journal Article] Organic matter cracking: A source of fluid overpressure in subducting sediments (2017)
  • Author(s): Raimbourg Hugues、Thiery Regis、Vacelet Maxime、Famin Vincent、Ramboz Claire、Boussafir Mohammed、Disnar Jean-Robert、Yamaguchi Asuka
  • Journal Title: Tectonophysics Volume: 721 Pages: 254-274
  • DOI: 10.1016/j.tecto.2017.08.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Stress State in the Kumano Basin and in Slope Sediment Determined From Anelastic Strain Recovery: Results From IODP Expedition 338 to the Nankai Trough (2017)
  • Author(s): Oohashi Kiyokazu、Lin Weiren、Wu Hung-Yu、Yamaguchi Asuka、Yamamoto Yuhji
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 18 Issue: 10 Pages: 3608-3616
  • DOI: 10.1002/2017gc007137
  • NAID: 120006884191
  • Peer Reviewed
• [Journal Article] High pressure experiments on metal-dilicate partitioning of chlorine in a magma ocean: Implications for terrestrial chlorine depletion (2017)
  • Author(s): Kuwahara Hideharu、Gotou Hirotada、Shinmei Toru、Ogawa Nobuhiro、Yamaguchi Asuka、Takahata Naoto、Sano Yuji、Yagi Takehiko、Sugita Seiji
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 18 Issue: 11 Pages: 3929-3945
  • DOI: 10.1002/2017gc007159
  • Peer Reviewed
• [Presentation] Chemical characteristics and source of the fluid involved in the black fault rocks in the Kodiak accretionary complex (2018)
  • Author(s): 石川 剛志、山口 飛鳥
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 海洋プレートの沈み込み直前域での改変実態解明に関連する掘削計画の現状と展望 (2018)
  • Author(s): 森下 知晃、山野 誠、藤江 剛、山口 飛鳥、小野 重明
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Effect of a half-graben structure on formation of a shallow plate boundary fault in subduction zone with analog modelling (2018)
  • Author(s): 高下 裕章、山田 泰広、大出 晃弘、Bauville Arthur、山口 飛鳥、芦 寿一郎
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] DSDP Leg 58 Site442~444, ODP Leg 131 Site 808から掘削された四国海盆基盤岩の再分析と、分析値の特徴 (2018)
  • Author(s): 原口 悟、藤永 公一郎、中村 謙太郎、山口 飛鳥、石井 輝秋
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Active tectonics of Muroto-off Ashizuri uplifted ridges, southwest Japan (2018)
  • Author(s): 芦 寿一郎、高下 裕章、山口 飛鳥、辻 健、池原 研
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Estimation of pore fluid overpressures for tensile cracking at depth of shallow slow earthquakes (2018)
  • Author(s): 大坪 誠、氏家 恒太郎、Hardebeck Jeanne、最首 花恵、宮川 歩夢、山口 飛鳥
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Comparison of volcanic glasses from tephra deposits frontal prism and incoming sediments (2018)
  • Author(s): 福地 里菜、Kan-Hsi Hsiung、Singleton Drake、山口 飛鳥、常 青、木村 純一、長橋 良隆、木村 学
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Postseismic fluid discharge chemically recorded in altered pseudotachylyte discovered from an ancient megasplay fault (2018)
  • Author(s): 長谷川 亮太、山口 飛鳥、福地 里菜、濱田 洋平、北村 有迅、木村 学、芦 寿一郎、石川 剛志
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Geological evidence of postseismic fluid discharge along an fossilized megasplay fault (2018)
  • Author(s): 山口 飛鳥、長谷川 亮太、大坪 誠、石川 剛志、福地 里菜、木村 学
  • Organizer: 日本地球惑星科学連合2018年大会
  • Invited
• [Presentation] 八代海における海底地すべり調査計画 (2018)
  • Author(s): 北村 有迅、山口 飛鳥、亀田 純、冨安 卓滋、児玉谷 仁、清家 弘治、川端 訓代、濱田 洋平
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Kodiak付加体のアルバイトを伴う黒色断層岩形成に寄与した流体の起源 (2018)
  • Author(s): 石川剛志・山口飛鳥
  • Organizer: 日本地質学会2018札幌大会
• [Presentation] 日本海溝に沈み込む堆積物の不均質分布：プレート境界断層浅部すべり伝播への影響 (2018)
  • Author(s): 山口飛鳥・中村恭之・福地里菜・倉野 紘彰・池原 研・金松敏也・新井和乃・宇佐見和子・芦寿一郎
  • Organizer: 日本地質学会2018札幌大会
• [Presentation] 南海付加体堆積物中の低熟成度炭質物ラマン分光分析とビトリナイト反射率の比較 (2018)
  • Author(s): 福地里菜・山口飛鳥・纐纈結衣・山本由弦・芦寿一郎
  • Organizer: 日本地質学会2018札幌大会
• [Presentation] 海山通過に伴う付加体斜面の堆積速度変化：南海トラフ室戸沖ODP Site 1175 & 1176の例 (2018)
  • Author(s): 大熊祐一・山口飛鳥・高下裕章・福地里菜・芦寿一郎
  • Organizer: 日本地質学会2018札幌大会
• [Presentation] Origin of fluids involved in paleo-plate-boundary décollement in the Kodiak accretionary complex (2018)
  • Author(s): Tsuyoshi Ishikawa, Asuka Yamaguchi
  • Organizer: 2018 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Deep sea environment 2.2 billion years ago constrained by iron speciation analyses of the drillcore black shales from Ghana (2018)
  • Author(s): Hiromasa Hayama, Kosei E Yamaguchi, Asuka Yamaguchi, Shoichi Kiyokawa, Takashi Ito, Minoru Ikehara
  • Organizer: 2018 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Constraining the deformation history of the frontal wedge of Hikurangi Subduction Margin with analog modeling and bedding trends from borehole logging of IODP Expedition 372 (2018)
  • Author(s): Hiroaki Koge, David D McNamara, Lower Hutt, Hung-Yu Wu, Gil Young Kim, Sebastian Cardona, Uma Shanker, Philip Barnes, Ingo Andreas Pecher, Leah J LeVay, Demian M Saffer, Laura M Wallace, Katerina E Petronotis, Atsushi Noda, Julia Morgan, Juichiro Ashi, Asuka Yamaguchi, Yasuhiro Yamada, Yohei Hamada
  • Organizer: 2018 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Silica Kinetics and Subduction Zone Slip Behavior (2018)
  • Author(s): Donald M Fisher, Andrew Smye, John N Hooker, David O Oakley and Asuka Yamaguchi
  • Organizer: 2018 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Turbidite evidence on repeated generation of the 2011 Tohoku-oki-like earthquakes along the Japan Trench (2017)
  • Author(s): Ken Ikehara, Toshiya Kanamatsu, Kazuko Usami, Kazuno Arai, Asuka Yamaguchi, and Rina Fukuchi
  • Organizer: European Geosciences Union General Assembly 2017
  • Int'l Joint Research
• [Presentation] Heterogeneous distribution of pelagic input sediments in the Japan Trench and its impact on seismic slip propagation (2017)
  • Author(s): 山口 飛鳥、中村 恭之、池原 研、金松 敏也、新井 和乃、福地 里菜、宇佐見 和子、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research / Invited
• [Presentation] Raman spectra of carbonaceous materials within the black fault rocks in Kodiak accretionary complex (2017)
  • Author(s): 山口 飛鳥、Raimbourg Hugues
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Warm memories of the Shikoku Basin recorded within the Nankai inner accretionary wedge (2017)
  • Author(s): 福地 里菜、山口 飛鳥、伊藤 久敏、山本 由弦、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Evolutionary process of the Nankai inner accretionary prism estimated by vitrinite reflectance analysis and zircon U-Pb age dating of deep borehole samples (2017)
  • Author(s): 福地 里菜、山口 飛鳥、伊藤 久敏、山本 由弦、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Fluorine and chlorine fractionation during magma ocean solidification: Implications for the origin and abundance of terrestrial halogens (2017)
  • Author(s): 桑原 秀治、小川 展弘、山口 飛鳥、鹿児島 渉悟、佐野 有司、入舩 徹男
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research / Invited
• [Presentation] 日奈久断層帯八代海区間における海底地すべりとその底質環境影響評価に関する調査計画 (2017)
  • Author(s): 北村 有迅、冨安 卓滋、亀田 純、児玉谷 仁、山口 飛鳥、清家 弘治、川端 訓代
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 延岡衝上断層をはさむボーリングコアの主要・微量元素の規定的要因 (2017)
  • Author(s): 長谷川 亮太、山口 飛鳥、北村 有迅、石川 剛志、福地 里菜、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Continuous formation processes of the shallow plate boundary fault in the Japan Trench reproduced by analog modeling experiments (2017)
  • Author(s): 高下 裕章、山田 泰広、大出 晃弘、山口 飛鳥、桑野 修、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 室戸-足摺沖隆起帯の浅部活構造 (2017)
  • Author(s): 芦 寿一郎、大出 晃弘、高下 裕章、山口 飛鳥、池原 研
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 第二渥美海丘西斜面の海底地すべりの高解像度浅部地下構造探査 (2017)
  • Author(s): 藤田 耕太郎、大出 晃弘、高下 裕章、辻 健、大塚 宏徳、山口 飛鳥、芦 寿一郎
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 日本海の約3-22万年前の海底堆積物(IODP Exp. 346)の硫黄の地球化学 : モンスーンの変遷を探る (2017)
  • Author(s): 押尾 秀、山口 耕生、高橋 聡、多田 隆治、奈良岡 浩、池原 実、山口 飛鳥
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 堆積構造および化学組成による泥質地震性タービダイトの認定の試み (2017)
  • Author(s): 奥津 なつみ、芦 寿一郎、大村 亜希子、山口 飛鳥、金松 敏也、菅沼 悠介、村山 雅史
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 古い海洋プレートの沈み込み直前での屈曲断層掘削計画：ロンドン会議の成果 (2017)
  • Author(s): 森下 知晃、山野 誠、藤江 剛、小野 重明、木村 純一、尾鼻 浩一郎、中村 恭之、山口 飛鳥、鹿児島 渉悟、斎藤 実篤、小平 秀一、Morgan Jason
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 北西太平洋域でのプレート沈み込みに伴う屈曲断層掘削計画の進展：国際ワークショップの成果 (2017)
  • Author(s): 森下 知晃、山野 誠、藤江 剛、小野 重明、木村 純一、尾鼻 浩一郎、中村 恭之、山口 飛鳥、鹿児島 渉悟、斎藤 実篤、小平 秀一、Morgan Jason
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Record of slow slip instabilities in rocks: the role of silica redistribution in the behavior of subduction interfaces (2017)
  • Author(s): Donald M Fisher、Andrew Smye、Chris Marone、Asuka Yamaguchi, Gabrielle Ramirez
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] The origin of the early Cenozoic belt-boundary thrust and the Izanagi-Pacific ridge subduction in the western Pacific margin (2017)
  • Author(s): 木村 学、山口 飛鳥、亀田 純、北村 有迅、橋本 善孝、浜橋 真理
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 延岡衝上断層剪断帯の微細組織と流体依存性 (2017)
  • Author(s): 長谷川亮太・山口飛鳥・福地里 菜・北村有迅・木村 学・濱田洋平・石川剛志
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] 現在の日本列島のテクトニクスは~6 Maにはじまった？ (2017)
  • Author(s): 木村 学・辻 健・山口飛鳥・高下裕章
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] TENSION VEINS AS EVIDENCES OF LOCALIZED FLUID DISCHARGE IN SUBDUCTION ZONES: AN EXAMPLE OF NOBEOKA THRUST, SOUTHWESTERN JAPAN (2017)
  • Author(s): Makoto Otsubo, Jeanne Hardebeck, Ayumu Miyakawa, Asuka Yamaguchi
  • Organizer: Geological Society of America Annual Meeting
  • Int'l Joint Research
• [Presentation] SPECTRUM OF MEGATHRUST SLIP BEHAVIOR RECORDED WITHIN ANCIENT ACCRETIONARY COMPLEXES: THE ROLE OF SILICA REDISTRIBUTION (2017)
  • Author(s): Donald M. Fisher, Andrew J. Smye, Chris Marone, Peter van Keken, Asuka Yamaguchi, David Oakley, Gabrielle Ramirez
  • Organizer: Geological Society of America Annual Meeting
  • Int'l Joint Research
• [Presentation] Heterogeneous distribution of pelagic sediments incoming the Japan Trench possibly controlling slip propagation on shallow plate boundary fault (2017)
  • Author(s): Asuka Yamaguchi, Yasuyuki Nakamura, Rina Fukuchi, Hiroaki Kurano, Ken Ikehara, Toshiya Kanamatsu, Kazuno Arai, Kazuko Usami, Juichiro Ashi
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Upper Plate hysteresis controlling seismogenic rupture area, slow slip area in Subduction Zone; example from the Nankai Trough (2017)
  • Author(s): Gaku Kimura, Asuka Yamaguchi
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Heterogeneous structure of the incoming plate in the Japan Trench (2017)
  • Author(s): Yasuyuki Nakamura, Gou Fujie, Asuka Yamaguchi, Shuichi Kodaira, Seiichi Miura
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Localized fluid discharge in subduction zones: Insights from tension veins around an ancient megasplay fault (Nobeoka Thrust, SW Japan) (2017)
  • Author(s): Makoto Otsubo, Jeanne Hardebeck, Ayumu Miyakawa, Asuka Yamaguchi, Gaku Kimura
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Structural evolution of the Nankai inner accretionary prism constrained by thermal structure and sedimentary age of deep borehole samples (2017)
  • Author(s): Rina Fukuchi, Asuka Yamaguchi, Hisatoshi Ito, Yuzuru Yamamoto, Juichiro Ashi
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Fluid-rock interaction recorded in fault rocks of the Nobeoka Thrust, fossilized megasplay fault in an ancient accretionary complex (2017)
  • Author(s): Ryota Hasegawa, Asuka Yamaguchi, Rina Fukuchi, Yujin Kitamura, Gaku Kimura, Yohei Hamada, Juichiro Ashi, Tsuyoshi Ishikawa
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Surface sediment remobilization triggered by earthquakes in the Nankai forearc region (2017)
  • Author(s): Natsumi Okutsu, Juichiro Ashi, Asuka Yamaguchi, Tomohisa Irino, Ken Ikehara, Toshiya Kanamatsu, Yusuke Suganuma, Masafumi Murayama
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Iron isotope constraints on arsenic release from Mekong Delta sediments, Cambodia (2017)
  • Author(s): Taichi Matsumoto, Kosei E Yamaguchi, Takafumi Hirata, Yuko Yamagata, Asuka Yamaguchi, Gou Abe
  • Organizer: 2017 AGU Fall Meeting\
  • Int'l Joint Research
• [Presentation] Phosphorus and iron speciation of the Japan Sea sediments 30 ~ 220 kyr ago (IODP Exp. 346): Implications for the evolution of Asian Monsoon climate system (2017)
  • Author(s): Saeka Masuda, Kosei E Yamaguchi, Minoru Ikehara, Satoshi Takahashi, Asuka Yamaguchi, Ryuji Tada
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Scaly fabrics and veins of tectonic melanges in the Shimanto Belt, SW Japan (2017)
  • Author(s): Gabrielle Elizabeth Ramirez, Donald M Fisher, Andrew Smye, Yoshitaka Hashimoto, Asuka Yamaguchi
  • Organizer: 2017 AGU Fall Meeting
  • Int'l Joint Research