Theoretical-experimental studies on frictional characteristics of serpentinite

• Project/Area Number: 20J20413
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 国内
• Review Section: Basic Section 17040:Solid earth sciences-related
• Research Institution: The University of Tokyo
• Principal Investigator: 奥田 花也 東京大学, 大気海洋研究所, 特別研究員(DC1)
• Project Period (FY): 2020-04-24 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥3,100,000 (Direct Cost: ¥3,100,000); Fiscal Year 2022: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2021: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2020: ¥1,100,000 (Direct Cost: ¥1,100,000)
• Keywords: 沈み込み帯 / 地震 / 摩擦実験 / 摩擦特性

Outline of Research at the Start

蛇紋岩は岩石力学的に脆弱であり、沈み込み帯等における地震活動を制約している。本研究では地震活動と断層挙動の理解に向け、理論計算と実験を通して蛇紋岩の摩擦特性の解明に取り組む。理論計算においては原子スケールの摩擦特性を非経験的に明らかにし理論的な摩擦特性の理解を目指す。実験においては純物質および天然断層物質の摩擦挙動およびその温度圧力依存性を明らかにし、天然断層における地震時の挙動の解明を試みる。

Outline of Annual Research Achievements

2022年度は以下の研究を実施した。
(1) 蛇紋岩鉱物の一種であるブルーサイトと近い結晶構造をもつギブサイトの理論計算の結果を査読付き英文国際誌American Mineralogistに投稿し、受理され、現在印刷中である。
(2) 変質玄武岩が沈み込み帯における地震発生帯で示す摩擦特性を調べた熱水実験の結果を論文にまとめ、査読付き英文国際誌Journal of Geophysical Research: Solid Earth誌に投稿・受理され、Okuda et al. (2023)として2023年1月に掲載された。
(3) 火山ガラスと粘土鉱物の混合物に関する摩擦実験を進め、論文化をおこない、査読付き英文国際誌Journal of Geophysical Research: Solid Earth誌に投稿、現在査読中である。
(4) 粘土鉱物の変質が断層挙動に与える影響を調べるため、南海トラフにおける原位置の温度・圧力・鉱物条件を再現した高温高圧摩擦実験を行った。その結果、スメクタイトがイライト化する反応は摩擦特性に影響を及ぼさないことが明らかとなった。この結果は現在エア毒付き英文国際誌への投稿を目指し、論文執筆中である。

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] ユトレヒト大学(オランダ)
• [Int'l Joint Research] ユトレヒト大学(オランダ)
• [Int'l Joint Research] ブレーメン大学(ドイツ)
• [Int'l Joint Research] MARUM, University of Bremen(ドイツ)
• [Journal Article] Hydrothermal friction experiments on simulated basaltic fault gouge and implications for megathrust earthquakes (2023)
  • Author(s): H. Okuda, A.R. Niemeijer, M. Takahashi, A. Yamaguchi, and C.J. Spiers
  • Journal Title: Journal of Geophysical Research Volume: 128 Issue: 1
  • DOI: 10.1029/2022jb025072
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atomic-scale interlayer friction of gibbsite is lower than brucite due to interactions of hydroxyls (2023)
  • Author(s): Hanaya Okuda、Kenji Kawai, Hiroshi Sakuma
  • Journal Title: American Mineralogist Volume: 印刷中 Issue: 8 Pages: 1476-1482
  • DOI: 10.2138/am-2022-8561
  • Peer Reviewed
• [Journal Article] Deformation Process and Mechanism of the Frontal Megathrust at the Nankai Subduction Zone (2022)
  • Author(s): Kimura Gaku、Hamada Yohei、Yabe Suguru、Yamaguchi Asuka、Fukuchi Rina、Kido Yukari、Maeda Lena、Toczko Sean、Okuda Hanaya、Ogawa Nobuhiro、Morioka Hitoshi、Ujiie Kohtaro、Saffer Demian
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 23 Issue: 4
  • DOI: 10.1029/2021gc009855
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Depth profile of frictional properties in the inner Nankai accretionary prism using cuttings from IODP Site C0002 (2022)
  • Author(s): Fujioka Riho、Katayama Ikuo、Kitamura Manami、Okuda Hanaya、Hirose Takehiro
  • Journal Title: Progress in Earth and Planetary Science Volume: 9 Issue: 1 Pages: 31-31
  • DOI: 10.1186/s40645-022-00488-1
  • Peer Reviewed / Open Access
• [Journal Article] 沈み込み帯における断層挙動の多様性をもたらす地質学的要因 (2022)
  • Author(s): 山口 飛鳥, 大熊 祐一, 奥田 花也, 山本 一平, 福地 里菜
  • Journal Title: 月刊地球 Volume: 44 Pages: 53-542
• [Journal Article] Recent boulder falls within the Finsen crater on the lunar far side: An assessment of the possible triggering rationale (2022)
  • Author(s): Ruj Trishit、Komatsu Goro、Kawai Kenji、Okuda Hanaya、Xiao Zhiyong、Dhingra Deepak
  • Journal Title: Icarus Volume: 377 Pages: 114904-114904
  • DOI: 10.1016/j.icarus.2022.114904
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spatial Patterns in Frictional Behavior of Sediments Along the Kumano Transect in the Nankai Trough (2021)
  • Author(s): Okuda Hanaya、Ikari Matt J.、Roesner Alexander、Stanislowski Katja、H?pers Andre、Yamaguchi Asuka、Kopf Achim J.
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 126 Issue: 11
  • DOI: 10.1029/2021jb022546
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Effect of normal stress on the frictional behavior of brucite: application to slow earthquakes at the subduction plate interface in the mantle wedge (2021)
  • Author(s): Okuda Hanaya、Katayama Ikuo、Sakuma Hiroshi、Kawai Kenji
  • Journal Title: Solid Earth Volume: 12 Issue: 1 Pages: 171-186
  • DOI: 10.5194/se-12-171-2021
  • Peer Reviewed / Open Access
• [Presentation] Conglomeratic sandstone-derived mylonite discovered from a highly metamorphosed Cretaceous accretionary complex. (2022)
  • Author(s): Asuka Yamaguchi, Ippei Yamamoto, Yoshihiro Nakamura, Yumiko Harigane, Hanaya Okuda
  • Organizer: JpGU2022
  • Int'l Joint Research / Invited
• [Presentation] 博士課程学生の在外研究の例: ユトレヒト大学(オランダ) (2022)
  • Author(s): 奥田花也
  • Organizer: JpGU2022
  • Invited
• [Presentation] Laboratory friction experiments for understanding fault slip behavior in the shallow Nankai subduction zone. (2022)
  • Author(s): Hanaya Okuda, Asuka Yamaguchi
  • Organizer: JpGU2022
  • Int'l Joint Research / Invited
• [Presentation] 海溝型地震発生メカニズムの解明に向けた水熱環境下での玄武岩の摩擦実験 (2022)
  • Author(s): 奥田 花也, Andre; R. Niemeijer, 高橋 美紀, 山口 飛鳥, Christopher J. Spiers
  • Organizer: JpGU2022
  • Invited
• [Presentation] 粘土鉱物を含む断層ガウジの中速度域での摩擦特性 (2022)
  • Author(s): 奥田 花也, 廣瀬 丈洋, 山口 飛鳥
  • Organizer: 日本地震学会
• [Presentation] Skewed concentric crater fill deposits in the northern mid-latitude of Mars (2022)
  • Author(s): Trishit Ruj, Hanaya Okuda, Tomohiro Usui, Goro Komatsu
  • Organizer: 2nd MetMeSS 2022
  • Int'l Joint Research
• [Presentation] Wet clay induces fault weakening and re-strengthening at intermediate velocity conditions (2022)
  • Author(s): Hanaya Okuda, Takehiro Hirose, Asuka Yamaguchi
  • Organizer: Gordon Research Seminar/Conference
  • Int'l Joint Research
• [Presentation] Role of smectite-illite transition in the onset of seismogenic zone in subduction zones from experimental viewpoints (2022)
  • Author(s): Hanaya Okuda, Manami Kitamura, Miki Takahashi, Asuka Yamaguchi
  • Organizer: International Joint Workshop on Slow-to-Fast Earthquakes 2022
  • Int'l Joint Research
• [Presentation] Effects of solar radiation on the glacial deposits distributed at northern low to mid-latitudes of Mars (2022)
  • Author(s): Trishit Ruj, Pierre-Antoine Tesson, Hanaya Okuda, Tomohiro Usui, Goro Komatsu, Gene W. Schmidt, Shun Mihira
  • Organizer: Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Recent boulder falls within the Finsen crater, an assessment of ongoing geological activities. (2021)
  • Author(s): Trishit Ruj, Goro Komatsu, Kenji Kawai, Hanaya Okuda, Zhiyong Xiao, Deepak Dhingra
  • Organizer: JpGU2021
  • Int'l Joint Research
• [Presentation] 島弧海溝系における堆積物のすべり特性解明に向けた火山ガラス-粘土混合系の摩擦実験 (2021)
  • Author(s): 奥田 花也, 廣瀬 丈洋, 山口 飛鳥
  • Organizer: JpGU2021
• [Presentation] 南海トラフ掘削試料の摩擦特性プロファイルから推察する浅部スロー地震の発生プロセス (2021)
  • Author(s): 片山 郁夫, 藤岡 里帆, 北村 真奈美, 奥田 花也, 廣瀬 丈洋
  • Organizer: 日本地質学会
• [Presentation] 沈み込み帯の断層挙動の多様性をもたらす地質学的要因. (2021)
  • Author(s): 山口 飛鳥, 大熊 祐一, 奥田 花也, 山本 一平, 福地 里菜
  • Organizer: 日本地質学会
• [Presentation] Geological factors affecting broad spectrum of fault behavior in subduction zones. (2021)
  • Author(s): Asuka Yamaguchi, Yuichi Okuma, Hanaya Okuda, Ippei Yamamoto, Rina Fukuchi
  • Organizer: International Joint Workshop on Slow Earthquakes 2021
  • Int'l Joint Research
• [Presentation] 南海トラフC0002掘削地点でのカッティングス試料を用いた摩擦特性プロファイルの作成 (2021)
  • Author(s): 藤岡 里帆, 片山 郁夫, 北村 真奈美, 奥田 花也, 廣瀬 丈洋
  • Organizer: 日本鉱物科学会
• [Presentation] Frictional coefficient and its velocity dependence of cuttings retrieved from the Nankai accretionary prism at IODP Site C0002 (2021)
  • Author(s): Riho Fujioka, Ikuo Katayama, Manami Kitamura, Hanaya Okuda, Takehiro Hirose
  • Organizer: JpGU2021
  • Int'l Joint Research
• [Presentation] Effects of smectite content and velocity on frictional behavior of volcanic glass-smectite mixtures: implication for fault slip behavior in shallow subduction zones (2021)
  • Author(s): Hanaya Okuda, Takehiro Hirose, Asuka Yamaguchi
  • Organizer: Earthquakes (3rd edition) Nucleation, triggering, and relationships with aseismic processes
  • Int'l Joint Research
• [Presentation] Spatiotemporal variation in frictional behavior within the Nankai accretionary prism (2020)
  • Author(s): Hanaya Okuda, Matt J. Ikari, Alexander Roesner, Katja Stanislowski, Andre Huepers, Asuka Yamaguchi, Achim J. Kopf
  • Organizer: JpGU-AGU Joint Meeting
  • Int'l Joint Research
• [Presentation] Spatiotemporal variation in frictional behavior within the Nankai accretionary prism (2020)
  • Author(s): Hanaya Okuda, Matt J. Ikari, Alexander Roesner, Katja Stanislowski, Andre Huepers, Asuka Yamaguchi, Achim J. Kopf
  • Organizer: 日本地質学会構造地質部会
• [Presentation] Weak and unstable frictional behaviors of brucite under dry and wet conditions (2020)
  • Author(s): Hanaya Okuda, Ikuo Katayama, Hiroshi Sakuma, Kenji Kawai
  • Organizer: JpGU-AGU Joint Meeting
  • Int'l Joint Research
• [Presentation] First-principles investigation of brucite and gibbsite: An application to their macroscopic frictional characteristics (2020)
  • Author(s): Hanaya Okuda, Kenji Kawai, Hiroshi Sakuma
  • Organizer: AGU 2020 Fall meeting
  • Int'l Joint Research