スロー地震の地質学的描像と摩擦・水理特性の解明

2018 Fiscal Year Annual Research Report

• Project Area: Science of slow earthquakes
• Project/Area Number: 16H06476
• Research Institution: University of Tsukuba
• Principal Investigator: 氏家 恒太郎 筑波大学, 生命環境系, 准教授 (40359188)
• Co-Investigator(Kenkyū-buntansha): 片山 郁夫 広島大学, 理学研究科, 教授 (10448235) ; 森 康 北九州市立自然史・歴史博物館, 自然史課, 学芸員 (20359475) ; WALLIS R・Simon 東京大学, 大学院理学系研究科(理学部), 教授 (30263065) ; 橋本 善孝 高知大学, 教育研究部自然科学系理工学部門, 教授 (40346698) ; 谷川 亘 国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 主任研究員 (70435840) ; 堤 昭人 京都大学, 理学研究科, 准教授 (90324607)
• Project Period (FY): 2016-06-30 – 2021-03-31
• Keywords: 付加体 / 変成岩 / 摩擦実験

Outline of Annual Research Achievements

(A)スロー地震の地質学的描像
四万十付加体槇峰メランジュ及び西彼杵変成岩を対象に、地質調査、EBSDによる結晶方位解析、XRFによる全岩化学組成分析を行った、その結果、深部スロー地震発生深度では、交代作用に関連して脱水が起こり、水圧破砕や粘性剪断変形の局所化・歪速度の増加をもたらしていることを明らかにした。三波川帯中に露出するウェッジマントル起源の蛇紋岩体の地質構造と岩石学的特徴を検討し、深さ約40 kmではアンチゴライトの定向配列で特徴付けられる剪断帯の発達とそれに伴う流体圧上昇が、深さ約30 km以浅では脆性変形が卓越していることを明らかにした。また、FTIRを用いて蛇紋岩組織を可視化するための新しい手法を開発した。更に、沈み込み帯における剪断応力による剪断熱の影響を評価するための数値モデリングを行い、高応力と低応力の沈み込み型変成帯を識別する方法を提案した。陸上付加体で実施されている構造地質学的手法を紀伊半島沖南海トラフプレート境界断層に応用し、slip tendencyのマップを作成し、slip tendencyの高い地域が超低周波地震の発生域と一致することを見出した。

(B)スロー地震の摩擦・水理特性
沈み込み帯プレート境界域の代表的鉱物である粘土鉱物の摩擦特性を検討し、摩擦係数や摩擦の速度依存性が水の有無によって影響を受けることを明らかにした。生物起源堆積物を用いた摩擦実験を行い、3 mm/sより高速の条件で顕著なすべり弱化とそれに引き続くゆっくととしたすべり強化の挙動が見られることを明らかにした。この挙動は、母岩に透水性の高い岩石を用いると現れないことから、すべりに伴う断層帯内部での間隙水圧変動に起因していることが示唆された。模擬断層物質を用いた摩擦透水実験を実施し、すべり速度透水性の変動がスロー地震や地震サイクルに影響を及ぼしていることを明らかにした。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

(A)スロー地震の地質学的描像
A01, 02班とB02班が明らかにした沈み込み帯Episodic Tremor and Slipの観測結果を説明する地質モデル（クラックシール剪断脈と粘性剪断帯の共存）を提示し、論文公表した。この論文は、高い被引用数と関心をもたらしている。学会発表も数多く行われ、内容は研究成果に関するものから研究手法開発に至るものまで多岐に渡る。論文執筆も進んでおり、投稿に向けた準備がほぼ整いつつある。

(B)スロー地震の摩擦・水理特性
粘土鉱物や生物起源堆積物の摩擦特性を決定づける要因が明らかになってきた。これにより、スロー地震の発生要因の理解が進んだ。摩擦試験機の開発に関しては、データの再現性を確かめているところである。南海トラフ掘削試料を用いた研究に関しては、プレート境界断層に到達できなかったため、カッティングスを用いた研究に変更して進めている。論文執筆も進んでおり、投稿に向けた準備がほぼ整いつつある。

Strategy for Future Research Activity

(A)スロー地震の地質学的描像
四万十付加体槇峰メランジュ及び西彼杵変成岩を対象とした地質調査、EBSDによる結晶方位解析、XRFによる全岩化学組成分析を継続し、交代作用に伴う脆性変形と粘性剪断歪速度の増加がそれぞれ深部微動とスロースリップにどのように対応しているか検討する。三波川帯を対象とした研究では、堆積岩起源の沈み込み型変成岩の分析を行い、岩石の体積変化や組成変化を検討し、プレート境界に沿った流体の流動様式と流体流動量を明らかにする。紀伊半島南海トラフプレート境界面上の弾性波速度分布から物性、流体圧および摩擦強度の不均質な分布を検討し、slip tendencyの分布との対比を行う。また、陸上付加体においても面的な地質調査から小断層のslip tendencyの分布を検討し、現在の南海トラフの結果と対比する。

(B)スロー地震の摩擦・水理特性
断層ガウジ試料の剪断変形中に弾性波速度ならびに比抵抗を計測し，断層ガウジ内での構造変化に対応した物性変化を明らかにし、スロー地震が発生している断層面での物理状態の推定につなげる。沈み込み帯における断層物質の組成や透水性などの多様な性質や、すべり速度、間隙水圧、有効垂直応力などの条件が断層すべり安定性に及ぼす影響について実験を更に進め、沈み込み帯浅部断層の摩擦特性を明らかにする。摩擦透水実験で得られた摩擦透水パラメータ（透水係数と速度変化の関係）を用いて、C01, 02班と協力してスロー地震の発生シミュレーションを実施する。更に、南海掘削試料（カッティングス）を用いて透水性を評価する研究をまとめる。

Research Products

• [Int'l Joint Research] Cardiff University(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: Cardiff University
• [Int'l Joint Research] McGill University(カナダ)
  • Country Name: CANADA
  • Counterpart Institution: McGill University
• [Journal Article] Geochemical analysis unveils frictional melting processes in a subduction zone fault (2019)
  • Author(s): Ishikawa, T. and K. Ujiie
  • Journal Title: Geology Volume: 47 Pages: 343-346
  • DOI: 10.1130/G45889.1
  • Peer Reviewed
• [Journal Article] An inhomogeneous across-slab conduit controlled by intraslab stress heterogeneity in the Nankai subduction zone (2019)
  • Author(s): Otsubo, M., A. Miyakawa, I. Katayama, and K. Okazaki
  • Journal Title: Scientific Reports Volume: 9 Pages: 994:1-6
  • DOI: 10.1038/s41598-018-38142-w
  • Peer Reviewed / Open Access
• [Journal Article] Chitinozoans and scolecodonts from the Silurian and Devonian of Japan (2019)
  • Author(s): Vandenbroucke, T. O. Hints, M. Williams, S. Wallis, J. Velleman, T. Kurihara, G. Tanaka, T. Komatsu, P. Mannik, D. Siveter, and T. de Backer
  • Journal Title: Island Arc Volume: 28 Pages: e12294:1-13
  • DOI: 10.1111/iar.12294
  • Peer Reviewed
• [Journal Article] The paleobiogeographical significance of the Silurian and Devonian trilobites of Japan (2019)
  • Author(s): Stocker, C.P., D.J. Siveter, P.D. Lane, M. Williams, T. Oji, S. Wallis, G. Tanaka, T. Komatsu, D. Siveter, T. Vandenbroucke
  • Journal Title: Island Arc Volume: 28 Pages: e12287:1-15
  • DOI: 10.1111/iar.12287
  • Peer Reviewed
• [Journal Article] Paleo-stress orientations and magnitudes from triaxial testing and stress inversion analysis in Nankai accretionary prism sediments (2019)
  • Author(s): Hashimoto, Y., M. Stipp, J.. Lewis, and F. Wuttke
  • Journal Title: Progress in Earth and Planetary Science Volume: 6 Pages: 3:1-11
  • DOI: 10.1186/s40645-018-0249-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano (2019)
  • Author(s): Kinoshita, M., K. Shiraishi, E. Demetriou, Y. Hashimoto, and W. Lin
  • Journal Title: Progress in Earth and Planetary Science Volume: 6 Pages: 7:1-17
  • DOI: 10.1186/s40645-018-0253-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An explanation of episodic tremor and slow slip constrained by crack-seal veins and viscous shear in subduction melange (2018)
  • Author(s): Ujiie, K., H. Saishu, A. Fagereng, N. Nishiyama, M. Otsubo, H. Masuyama, and H. Kagi
  • Journal Title: Geophysical Research Letters Volume: 45 Pages: 5371-5379
  • DOI: 10.1029/2018GL078374
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fluid-induced fracturing of initially damaged granites triggered by pore pressure buildup (2018)
  • Author(s): Katayama, I., A. Nicolas, and A. Schubnel
  • Journal Title: Geophysical Research Letters Volume: 45 Pages: 7488-7495
  • DOI: 10.1029/2018GL077815
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evolution of permeability and fluid pathway in the uppermost oceanic crust inferred from experimental measurements on basalt cores (2018)
  • Author(s): Kawaguchi, K., and I. Katayama
  • Journal Title: Journal of Petrological and Mineralogical Science Volume: 113 Pages: 268-272
  • DOI: 10.2465/jmps.180411
  • Peer Reviewed / Open Access
• [Journal Article] Effects of humidity and interlayer cations on the frictional strength of montmorillonite (2018)
  • Author(s): Tetsuka, H., I. Katayama, H. Sakuma, and K. Tamura
  • Journal Title: Earth, Planet and Space Volume: 70 Pages: 56:1-9
  • DOI: 10.1186/s40623-018-0829-1
  • Peer Reviewed / Open Access
• [Journal Article] Evolution of elastic velocities and amplitudes during triaxial deformation of Aji granite under dry and water-saturated conditions (2018)
  • Author(s): Zaima, K., and I. Katayama, I.
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 9601-9614
  • DOI: 10.1029/2018JB016377
  • Peer Reviewed
• [Journal Article] What is the origin of macroscopic friction? (2018)
  • Author(s): Sakuma, H., K. Kawai, I. Katayama,and S. Suehara
  • Journal Title: Science Advances Volume: 4 Pages: eaav2268:1-5
  • DOI: 10.1126/sciadv.aav2268
  • Peer Reviewed
• [Journal Article] Normal faults at depth with thrust faults in an exhumed accretionary complex, Kayo Formation, Okinawa islands, Japan (2018)
  • Author(s): Hashimoto, Y., D. Ueda, Y. Motomiya, K. Tobe, A. Saiki, K. Morita, and K. Ujiie
  • Journal Title: Geological Society of America Special Papers Volume: 534 Pages: 175-185
  • DOI: 10.1130/2018.2534(11)
  • Peer Reviewed
• [Journal Article] Physical property anisotropy of foliated fault rocks: Study from the Nobeoka Thrust, Shimanto Belt, southwest Japan (2018)
  • Author(s): Hamahashi, M., W. Tanikawa, Y. Hamada, Y. Hashimoto, S. Saito, and G. Kimura
  • Journal Title: Island Arc Volume: 27 Pages: e12257:1-17
  • DOI: 10.1111/iar.12257
  • Peer Reviewed
• [Journal Article] Laboratory measurements quantifying elastic properties of accretionary wedge sediments: Implications for slip to the trench during the 2011 Mw 9.0 Tohoku-Oki earthquake (2018)
  • Author(s): Tamara J., H. Tobin, and Y. Hashimoto
  • Journal Title: Geosphere Volume: 14 Pages: 1411-1424
  • DOI: 10.1130/GES01630.1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermal conductivity changes of subducting basalt, Nankai subduction zone, SW Japan: An estimation from laboratory measurements under high-pressure and high-temperature conditions (2018)
  • Author(s): Lin, W., O. Tadai, M. Kinoshita, J. Kameda, W. Tanikawa, T. Hirose, Y. Hamada, and O. Matsubayashi
  • Journal Title: Geological Society of America Special Papers Volume: 534 Pages: 34-50
  • DOI: 10.1130/2018.2534(02)
  • Peer Reviewed
• [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 (2018)
  • Author(s): Ikehara, K., K. Usami, T. Kanamatsu, K. Arai, A. Yamaguchi, and R. Fukuchi
  • Journal Title: Geological Society Special Publications Volume: 456 Pages: 75-89
  • DOI: 10.1144/SP456.9
  • Peer Reviewed
• [Journal Article] Fluid properties and dynamics along the seismogenic plate interface (2018)
  • Author(s): Raimbourg, H., V. Famin, G. Palazzin, M. Mayoux, L. Jolivet, C. Ramboz, A. Yamaguchi
  • Journal Title: Geosphere Volume: 14 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): Okutsu, N., J. Ashi, A. Yamaguchi, T. Irino, K. Ikehara, T. Kanamatsu, Y. Suganuma, M. Murayama
  • Journal Title: Geological Society Special Publications Volume: 477 Pages: -
  • DOI: 10.1144/SP477.22
  • 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, G., Yamaguchi, A., Kinoshita, M.
  • Journal Title: Geological Society of America Special Paper Volume: 534 Pages: 87-99
  • DOI: 10.1130/2018.2534(05)
  • Peer Reviewed
• [Journal Article] A Seismogeodetic Amphibious Network in the Guerrero Seismic Gap, Mexico (2018)
  • Author(s): Cruz-Atienza, V. M., Y. Ito, V. Kostoglodov, V. Hjorleifsdottir, A. Iglesias, J. Tago, M. Calo, J. Real, A. Husker, S. Ide, T. Nishimura, M. Shinohara, C. Mortera‐Gutierrez, S. Garcia, and M. Kido
  • Journal Title: Seismological Research Letters Volume: 89 Pages: 1435-1449
  • DOI: 10.1785/0220170173
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Along-arc heterogeneity of the seismic structure around a large coseismic shallow slip area of the 2011 Tohoku-oki Earthquake: 2-D Vp structural estimation through an airgun-ocean bottom seismometer experiment in the Japan Trench subduction zone (2018)
  • Author(s): Azuma, R., R. Hino, Y. Ohta, Y. Ito, K. Mochizuki, K. Uehira, Y. Murai, T. Sato, T. Takanami, M. Shinohara, and T. Kanazawa
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 5249-5264
  • DOI: 10.1029/2017JB015361
  • Peer Reviewed
• [Journal Article] Development of a Slow Earthquake Database (2018)
  • Author(s): Kano, M., N. Aso, T. Matsuzawa, S. Ide, S. Annoura, R. Arai, S. Baba, M. Bostock, K. Chao, K. Heki, S. Itaba, Y. Ito, N. Kamaya, T. Maeda, J. Maury, M. Nakamura, T. Nishimura, K. Obana, K. Ohta, N. Poiata, B. Rousset, H, Sugioka, R. Takagi, T. Takahashi, A. Takeo, Y. Tu, N. Uchida, Y. Yamashita, and K. Obara
  • Journal Title: Seismological Research Letters Volume: 89 Pages: 1566-1575
  • DOI: 10.1785/0220180021
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Earthquakes and Tremor Linked to Seamount Subduction During Shallow Slow Slip at the Hikurangi Margin, New Zealand (2018)
  • Author(s): Todd, E.K., S.Y. Schwartz, K. Mochizuki, L. M. Wallace, A. F. Sheehan, S. C. Webb, C. A. Williams, J. Nakai, J. Yarce, B. Fry. S. Henrys, and Y. Ito
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 6769-6783
  • DOI: 10.1029/2018JB016136
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Using Tsunami Waves Reflected at the Coast to Improve Offshore Earthquake Source Parameters: Application to the 2016 Mw 7.1 Te Araroa Earthquake, New Zealand (2018)
  • Author(s): Kubota, T, T. Saito, Y. Ito, Y. Kaneko, L. M. Wallace, S. Suzuki, R. Hino, and S. Henrys
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 8767-8779
  • DOI: 10.1029/2018JB015832
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spatiotemporal Variation of Tectonic Tremor Activity Before the Tohoku-Oki Earthquake (2018)
  • Author(s): Katakami, S., Y. Ito, K. Ohta, R. Hino, S. Suzuki, and M. Shinohara
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 9676-9688
  • DOI: 10.1029/2018JB016651
  • Peer Reviewed
• [Journal Article] Spatio-temporal changes in the seismic velocity induced by the 2011 Tohoku-Oki earthquake and slow slip event revealed from seismic interferometry, using Ocean Bottom Seismometer's records (2018)
  • Author(s): Uemura, M, Y. Ito, K. Ohta, R. Hino, M. Shinohara
  • Journal Title: Progress in Earth and Planetary Science Volume: 5 Pages: 87:1-16
  • DOI: 10.1186/s40645-018-0240-3
  • Peer Reviewed
• [Journal Article] Seafloor crustal deformation on ocean bottom pressure records with non-tidal variability corrections: application to Hikurangi margin, New Zealand, (2018)
  • Author(s): Muramoto, T., Y. Ito, D. Inazu, L. M. Wallace, R. Hino, S. Suzuki, S. C. Webb, S. Henrys
  • Journal Title: Geophysical Research Letters Volume: 46 Pages: 303-310
  • DOI: 10.1029/2018GL080830
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Structure of calcite-aqueous NaCl solution interfaces from ambient to elevated temperatures (2018)
  • Author(s): Sakuma, H., H.O. Sorensen, J. Kawano, N. Bovet, K. Fukushi, N. Nishiyama, and H. Nakao
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 113 Pages: 232-244
  • DOI: 10.2465/jmps.180329
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Continuous depth profile of the rock strength in the Nankai accretionary prism based on drilling performance parameters, (2018)
  • Author(s): Hamada, Y. M. Kitamura, Y. Yamada, Y. Sanada, T. Sugihara, S. Saito, & T. Hirose
  • Journal Title: Scientific Reports Volume: 8 Pages: 2622:1-9
  • DOI: 10.1038/s41598-018-20870-8
  • Peer Reviewed
• [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 Pages: e12241:1-12
  • DOI: 10.1111/iar.12241.
  • Peer Reviewed
• [Presentation] The role of pressure solution creep on frictional healing of quartz gouge (2019)
  • Author(s): Nishiyama, N.
  • Organizer: International Symposium Crustal Dynamics (ISCD-2)
  • Int'l Joint Research
• [Presentation] Episodic tremor and slip explained by crack-seal veins and viscous shear in subduction melanges (2018)
  • Author(s): Ujiie, K., H. Saishu, A. Fagereng, N. Nishiyama, M. Otsubo, H. Masuyama, and H. Kagi
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Mantle-derived fluid migration along subduction plate boundary: Constraints from helium isotope analysis of shear veins in the subduction melange (2018)
  • Author(s): Nishiyama, N., K. Ujiie, and H. Sumino
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Metasomatic reaction and localization of low-angle thrust-sense viscous shear recorded in subduction melanges exhumed from source depths of slow earthquakes (2018)
  • Author(s): Noro, K., K. Ujiie, N. Nishiyama, Y. Mori, and H. Masuyama
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] リアルタイム観測・超深度掘削・超高圧実験の統合による沈み込み帯 4D描像 -地震・噴火から地球の遠未來まで,革新的予測科学への挑戦- (2018)
  • Author(s): 平田直;木下正高;篠原雅尚;益田晴恵;阿部なつ江;道林克禎;片山郁夫;氏家恒太郎;小村健太朗;藤原治;稲垣史生;諸野祐樹;入舩徹男;鍵裕之;西弘嗣;加藤照之;有吉慶介;小原一成
  • 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 L.・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] 「ちきゅう」による南海トラフと日本海溝掘削成果 (2018)
  • Author(s): 氏家恒太郎
  • Organizer: 海洋理工学会平成30年度春季大会
  • Invited
• [Presentation] Episodic tremor and slow slipの地質学的描像 (2018)
  • Author(s): 氏家恒太郎・最首花恵・Fagereng Ake・西山直毅・大坪誠・増山春菜・鍵裕之
  • Organizer: 日本地質学会第125年学術大会
• [Presentation] 四万十付加体槇峰メランジュからのマントル起源流体の検出：ヘリウム同位体によるアプローチ (2018)
  • Author(s): 西山直毅・氏家恒太郎・角野浩史
  • Organizer: 日本地質学会第125年学術大会
• [Presentation] 沈み込みプレート境界域における交代作用と延性剪断 (2018)
  • Author(s): 野呂和也・氏家恒太郎・西山直毅・森康・増山春菜
  • Organizer: 日本地質学会第125年学術大会
• [Presentation] Detection of mantle-derived fluid from the Makimine melange in the Shimanto accretionary complex: Evidence from helium isotope analysis on mineral veins (2018)
  • Author(s): Nishiyama, N., K. Ujiie, and H. Sumino
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Fluid-rock interaction in subducted melanges and its implications for fluid flow along the subduction plate boundary (2018)
  • Author(s): Noro, K., K. Ujiie, N. Nishiyama, Y. Mori, and H. Masuyama
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Low-angle brittle thrusting, localized viscous shear, and metasomatic reactions recorded in subduction melanges: Implications for slow earthquakes in subduction zones (2018)
  • Author(s): Ujiie, K., H. Saishu, K. Noro, A. Fagereng, and C. Tulley
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Stressed Out at the Border: Geological Observations and Models of Elevated Stresses along the Boundaries of Strong Lithologies in Shallow and Deep Melanges (2018)
  • Author(s): Phillips, N. J., C. D. Rowe, K. Ujiie, and E. Young
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Deformation of metabasalts in megathrust shear zones exposed on Kyushu Island, Japan (2018)
  • Author(s): Tulley, C. J., A. Fagereng, and K. Ujiie
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] 岩石の混合と反応が前弧スラブ―マントル境界における流体移動を促進する (2018)
  • Author(s): 森康、重野未来、西山忠男
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Geology of the Kamabuseyama serpentinite unit in the Sanbagawa belt of the Kanto Mountains and implications for fluid flow along the base of the mantle wedge from 30?20 km depths (2018)
  • Author(s): 横田麻莉、ウォリス サイモン、纐纈佑衣
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Change in dip of subduction zone isotherms recorded in the Sanbagawa metamorphic belt (2018)
  • Author(s): ウォリス サイモン、纐纈佑衣、貞本和志
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Grain boundary sliding and antigorite CPO formation in antigorite schist from the Sanbagawa belt, SW Japan: implications for the slab-mantle boundary rheology (2018)
  • Author(s): ウォリス サイモン、永冶方敬
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Preliminary results of lithostratigraphy in IODP Expedition 375: Hikurangi subduction margin coring and observatories (2018)
  • Author(s): Hashimoto, Y., C. Oliveira, S. Kutterolf, F. Meneghini, A. Noda, H. Rabinowitz, M. Underwood, D. Saffer, L. Wallace, K. Petronotis,
  • Organizer: 日本地球惑星科学連合2018年大会
  • Invited
• [Presentation] Dependence on the Stress and Slip Tendency Acting on the Subduction Megathrust of Nankai Seismogenic Zone Off Kumano (2018)
  • Author(s): Kinoshita, M., K. Shiraishi, Y. Hashimoto, and W. Lin
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Compiling physical property data obtained through NanTroSEIZE project (2018)
  • Author(s): Yabe, Su., R. Fukuchi, B. Gao, G. Motohashi, M. Hamahashi, Y. Hashimoto, G. Kimura
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Drilling and Coring the Northern Hikurangi Subduction Margin to Unlock the Secrets of Slow Slip: International Ocean Discovery Program Expeditions 372 and 375 (2018)
  • Author(s): Barnes, P., D. M. Saffer, L. M Wallace, I. A. Pecher, K. E. Petronotis, L. LeVay, and Expedition 372 Scientists, Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research / Invited
• [Presentation] Lithostratigraphy of the Hikurangi Subduction Inputs: Results of Coring During IODP Expedition 375 (2018)
  • Author(s): Underwood, M., H. Rabinowitz, A. Noda, F. Meneghini, S. Kutterolf, Y. Hashimoto, C. Oliveira, D. Saffer, L. Wallace, P. Barnes, I. Pecher, K. Petronotis, L. LeVay, and Expedition 375 Scientists, Expedition 372 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Geochemical Constraints on Fluid-Rock Reactions, Fluid Sources, and Flow Pathways Along the IODP Expedition 375 Transect; Northern Hikurangi Margin (2018)
  • Author(s): Solomon, E., A. Huepers, M. Luo, P. Malie, D. Saffer, M. Torres, L. Wallace, K. Petronotis, P. Barnes, I. Pecher, L. LeVay, and IODP Expedition 375 and Expedition 372 Scientist
  • Organizer: AGU Fall Meeting 2018
  • 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): Koge, H., D. McNamara, D. Gamboa, H.-Y. Wu, G. Kim, S. Cardona, U. Shanker, P. Barnes, I. Pecher, L. LeVay, D. Saffer, L. Wallace, K. Petronotis, A. Noda, J. Morgan, J. Ashi, A. Yamaguchi, Y. Yamada, Y. Hamada and Expedition 372 Scientists, Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Borehole stress indicators across the Hikurangi Subduction Margin: Preliminary insights from IODP Expedition 372 (2018)
  • Author(s): McNamara, D., , H.-Y. Wu, H. Lee, L. Wallace, G. Lee, K. Heeschen, J. Elger, D. Saffer, P. Barnes, I. Pecher, and IODP Expedition 372 & 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Formation Pore Pressure through the Tuaheni Landslide Complex and the Gas Hydrate Stability Zone at IODP Expedition 372 Site U1517, Hikurangi Margin, New Zealand (2018)
  • Author(s): Dugan, B., I. Pecher, M. Nole, J. Mountjoy, P. Barnes, L. LeVay, and IODP Expedition 372 Scientists and IODP Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Validating a full-waveform inversion velocity model at the north Hikurangi subduction margin using IODP drilling data (2018)
  • Author(s): Bell, R., M. Gray, J. Morgan, S. Henrys, D. Barker, N. Bangs, P. Barnes, L. Wallace, D. Saffer, K. Petronotis and Scientific Team of IODP Drilling Expedition 375 and Scientific Team of IODP Drilling Expedition 372 scientific team
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] The dynamics of shallow plate interface slip at the offshore Hikurangi subduction margin, New Zealand (2018)
  • Author(s): Wallace, L., P. Barnes, D. Saffer, S. Henrys, D. Barker, D. Bassett, F. Tontini, Y. Kaneko, Y. Ito, K. Mochizuki, S. Webb, K. Clark, U. Cochran, N. Litchfield, C. Williams Jr, S. Ellis, B. Fry, E. Todd, R. Bell, K. Petronotis, I. Pecher, L. LeVay and IODP Expedition 372 and 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research / Invited
• [Presentation] Frictional behavior of incoming sediment in the Hikurangi subduction zone at in-situ PT conditions (2018)
  • Author(s): Rabinowitz, H. H. Savage, S. Shreedharan, M. Ikari, F. Meneghini, Y. Ito, H. Kitajima, L. Wallace, D. Saffer, K. Petronotis, and Expedition 372/375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Magnetic fabrics of deformed soft sediments at the deformation front of the Hikurangi subduction margin (2018)
  • Author(s): Greve, A., T. Kanamatsu, A. Fagereng, J. Morgan, M. Wang, H. Savage, M. Kars, X. Li, L. Wallace, D. Saffer, K. Petronotis, and Expedition 375 and 372 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Signatures of Brittle Deformation in a Shallow Fault in the Hikurangi Subduction Margin (2018)
  • Author(s): Savage, H., G. Coffey, S. Shreedharan, P. Polissar, A. Fagereng, F. Meneghini, M. Wang, Y. Hashimoto, L. Wallace, D. Saffer, P. Barnes, I. Pecher, K. Petronotis, L. LeVay, and IODP Expedition 372/375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Elastic moduli and physical properties of fault rock and protolith associated with SSEs at the Northern Hikurangi margin, NZ (2018)
  • Author(s): Saffer, D., R. Bell, P. Barnes, L. Wallace, H. Kitajima, G. Moore, S. Han, I. Pecher, K. Petronotis, L. LeVay, and IODP Expedition 372 and 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] IODP borehole observatories to monitor slow slip at the offshore Hikurangi subduction zone (2018)
  • Author(s): Wallace, L., E. Solomon, P. Fulton, D. Saffer, K. Petronotis, H. Jannasch, E. Davis, B. Rhinehart, J. Van Hyfte, K. Grigar, P. Barnes, R. Bell, I. Pecher, L. LeVay and IODP Expedition 372 and 375 Science Parties
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Compactive deformation in the incoming sedimentary section of the Hikurangi Subduction Margin, New Zealand: Constraints from seismic reflection data and IODP cores (2018)
  • Author(s): Wang, M., P. Barnes, J. Morgan, R. Bell, A. Fagereng, H. Savage, D. Saffer, L. Wallace, K. Petronotis, and Shipboard Scientists from IODP Expeditions 372 and 375
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Subduction-Related Strain in a Calcareous-Pelagic Shear Zone: Insights on Deformation at the Hikurangi Margin Plate Interface from the Input Sequence at Site U1520 and the Llanddwyn Island Shear Zone, Anglesey, U.K. (2018)
  • Author(s): Leah, H., A. Fagereng, F. Meneghini, J. Morgan, H. Savage, M. Wang, D. Saffer, L. Wallace, K. Petronotis, and IODP Expedition 372 and 375 Science Parties
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] RESPONSE OF GAS HYDRATE SYSTEMS TO SUBDUCTION-ZONE PROCESSES ON THE NORTHERN HIKURANGI MARGIN, NEW ZEALAND (2018)
  • Author(s): Pecher, I., P. Oluwunmi, A. Djeffal, N. Bangs, G. Crutchley, J. Mountjoy, H. Villinger, P. Barnes, K. Heeschen, B. Dugan, M. Reagan, G. Moridis, R. Archer, D. Saffer, L. Wallace, L. LeVay, K. Petronotis and Expedition 372 Scientists, Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Occurrence and fractionation of light hydrocarbons in the gas-hydrate bearing sediments of IODP Site U1517, Hikurangi Margin, New Zealand (2018)
  • Author(s): Heeschen, K., M. Torres, I. Pecher, S. Schlomer, S. Owari, P. Rose, M. Karina, J. Schicks, G. Hu, J. Mountjoy, P. Barnes, L. LeVay, E. Solomon, D. Saffer, L. Wallace, K. Petronotis, IODP Expedition 372 Scientists and IODP Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Seafloor Overthrusting Creates Ductilely Deformed Fault Rocks in Marine Sediments at the Hikurangi Margin: Implications for Fault Zone Evolution and Mechanics at IODP Site U1518 (2018)
  • Author(s): Morgan, J., A. Fagereng, H. Savage, M. Wang, F. Meneghini, P. Barnes, R. Bell, H. Kitajima, B. Dugan, L. Wallace, D. Saffer, I. Pecher, K. Petronotis, L. LeVay, IODP Expedition 372 Scientists and IODP Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Pore morphology, permeability, and constraints on gas hydrate accumulation in sediments from the Tuaheni Landslide Complex, NZ (2018)
  • Author(s): Nole, M., H. Daigle, B. Dugan, M. Clennell, M. Paganoni, P. Barnes, I. Pecher, L. LeVay, IODP Expedition 372 Scientists and IODP Expedition 375 Scientist
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Gas Hydrate Accumulations in Thin Sands (2018)
  • Author(s): Wei, L., A. Cook, M. Nole, A. Malinverno, H. Daigle, A. Georgiopoulou, P. Barnes, I. Pecher, L. LeVay, IODP Expedition 372 Scientists and IODP Expedition 375 Scientists
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Lithification of Volcaniclastic Deposits in the Hikurangi Subduction Zone: Preliminary Characterization of Fluid Circulation in the Incoming Plate, and Volatiles Entering the Trench (2018)
  • Author(s): Meneghini, F., C. Boschi, A. Fagereng, J. Morgan, M. Underwood, Y. Hashimoto, C. Oliveira, S. Kutterolf, A. Noda, H. Rabinowitz, H. Savage, M. Wang, L. Wallace, D. Saffer, P. Barnes, I. Pecher, K. Petronotis, L. LeVay, and Scientific Team of IODP Exp 375 and 372
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Changes in Paleo-stress Magnitude With Seismic Cycles in Large Thrust Faults (2018)
  • Author(s): Hashimoto. Y.
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research / Invited
• [Presentation] Paleo-Stress In An Exhumed Cretaceous Accretionary Complex, Shimanto Belt, In Konan City And Geisei Villege, Kochi Prefecture, SW Japan (2018)
  • Author(s): Hashiguchi, M., and Y. Hashimoto
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] K-Ar dating of fossil seismogenic thrusts in the Shimanto accretionary complex, southwest Japan (2018)
  • Author(s): Tonai, S., D. Fisher, D. Oakley, Y. Hashimoto, and N. Tomioka
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Change in Paleo-stress at the Toe of Nankai Accretion Prism Off Shikoku Island: Site C0023, IODP Expedition 370 (2018)
  • Author(s): Hashimoto, Y., and Y. Yamamoto
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] プレート境界断層の摩擦速度依存性への影響因子：コスタリカ沈み込み帯の例 (2018)
  • Author(s): 堤昭人、並木由香、比嘉咲希
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Factors affecting frictional velocity dependence of a plate-boundary fault: The Costa Rica subduction zone (2018)
  • Author(s): Tsutsumi, A., Y. Namiki, Y., and S. Higa
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 低-高速度域条件下における速度状態依存摩擦構成則のパラメターのすべり速度依存性 (2018)
  • Author(s): 中野龍二、堤昭人
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Effect of pore-fluid pressure on the frictional velocity dependence of subduction-zone faults (2018)
  • Author(s): Tsutsumi, A., and S. Higa
  • Organizer: AOGS 15th annual meeting
  • Int'l Joint Research
• [Presentation] 地震波干渉法に基づくスロー地震に伴う波動場の時空間変化 (2018)
  • Author(s): 植村美優、伊藤喜宏、太田和晃、日野亮太、篠原雅尚
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Micro Low-Frequency Tremor Activity Before the Tohoku-Oki Earthquake (2018)
  • Author(s): 片上智史、伊藤喜宏、太田和晃、日野亮太、鈴木秀市、篠原雅尚
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] オパールガウジの低温熱水条件における摩擦特性に対する溶解－析出クリープの影響 (2018)
  • Author(s): 中西智哉、金川久一、澤井みち代
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Frictional properties of accretionary sediments/rocks and their implications for the transition of aseismic to seismic faulting at the Nankai Trough Subduction Zone (2018)
  • Author(s): 阿部浩典、金川久一、澤井みち代、井上厚行
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Estimating source parameters of tectonic tremors using particle motions of continuous seismic records (2018)
  • Author(s): 太田和晃、伊藤喜宏
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Detection of the seismic structural variation around regions with slow earthquakes in southwest Japan using the receiver function method (2018)
  • Author(s): Sawaki, Y., Y. Ito, K. Ohta, T. Shibutani, and T. Iwata
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Difference of source parameters between shallow and deep tremors (2018)
  • Author(s): Katakami, S., K. Ohta, and Y. Ito
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Frequent activity of shallow tectonic tremors in the southern margin of the 2011 Tohoku-Oki earthquake rupture area (2018)
  • Author(s): Ohta, K., Y. Ito, S. Ohyanagi, R. Hino, Y. Ohta, R. Azuma, M. Shinohara, K. Mochizuki, T. Sato, and Y. Murai
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Book] 地球科学の事典 (2018)
  • Author(s): 鳥海光弘・入舩徹男・岩森光・ウォリスサイモン・小平秀一・小宮剛・阪口秀・鷺谷威・末次大輔・中川貴司・宮本英昭
  • Total Pages: 248
  • Publisher: 朝倉書店
  • ISBN: 978-4-254-16072-7