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Tribochemical hydrogen generation process associated with high-velocity frictional slip of faults

Research Project

Project/Area Number 21H01185
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionOkayama University (2023)
Hokkaido University (2021-2022)

Principal Investigator

Kameda Jun  岡山大学, 惑星物質研究所, 教授 (40568713)

Co-Investigator(Kenkyū-buntansha) 鈴木 徳行  北海道大学, 理学研究院, 名誉教授 (00144692)
廣瀬 丈洋  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), 研究所長 (40470124)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Keywordsトライボケミカル反応 / 水ー岩石反応 / 水素 / 断層 / メタネーション / ナノポア / ガス / 移行 / 断層岩 / 間隙構造 / トライボケミストリー / メタン / 蛇紋岩化作用 / メカノケミカル反応 / メカノケミストリー / ラジカル反応 / 活性酸素種 / 摩擦滑り / 地球生命史
Outline of Research at the Start

地殻で発生する水素(H2)は、ガス資源の形成過程や物質循環、さらに地球生命史を探るうえで鍵となる物質である。本研究では、地殻内の無機的水素生成作用の中でも断層におけるプロセスを対象とする。とくに、断層の高速摩擦滑りによって励起されるトライボケミカル型水素発生反応に注目し、断層摩擦実験と地震断層岩の残留ガス分析により、反応のメカニズムや水素発生量・フラックスを明らかにする。

Outline of Final Research Achievements

In this study, gas-production reactions that proceed in a fault during earthquake occurrence and the migration and storage processes of the gases produced were investigated by residual gas analysis and nanopore analysis of fault rocks formed in various geological environments. As a result, we found traces of H2 formation reactions at high temperatures above 250°C and traces suggesting methane conversion of CO2 in faults composed of igneous rocks. The nanopores in fault rocks are thought to be blocked by mineral precipitation at high temperatures around 200°C, while at low temperatures they are enlarged by rock fracturing and facilitate gas migration. In particular, gases formed in faults at temperatures below 200°C may diffuse efficiently into the surrounding and shallow subsurface areas of the fault, affecting the formation of resources and microbial metabolism there.

Academic Significance and Societal Importance of the Research Achievements

本研究では、地球内部の水素生成作用の中でも断層活動に関連した反応に焦点をあてた。その結果、多様な地質環境における水素やその関連ガスの生成・貯留プロセスの一端が明らかとなってきた。これらの成果は、地下ガス資源の形成機構解明につながるだけでなく、地球に学ぶ新たな水素エネルギー生成技術などにつながる重要な知見と考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (13 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (9 results) (of which Invited: 2 results)

  • [Journal Article] Thermogenic methane and hydrogen generation in subducted sediments of the Nankai Trough2024

    • Author(s)
      Noriyuki Suzuki, Koutaro Koike, Jun Kameda & Gaku Kimura
    • Journal Title

      Communications Earth & Environment

      Volume: 5 Issue: 1 Pages: 97-97

    • DOI

      10.1038/s43247-024-01252-7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Surface Physicochemical Properties of Smectite‐Rich Fault Gouge: A Case Study of the Japan Trench Plate‐Boundary Fault2023

    • Author(s)
      Nakamoto Keisuke、Kamei Motoki、Kameda Jun
    • Journal Title

      Geophysical Research Letters

      Volume: 50 Issue: 11

    • DOI

      10.1029/2023gl104271

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lowering of the kinetic barrier of clay-mineral reactions along a seismogenic fault: Example from the Nankai subduction zone, Japan2023

    • Author(s)
      Masumoto Hirokazu、Kameda Jun、Hamada Yohei、Ujiie Kohtaro、Kitamura Yujin
    • Journal Title

      Tectonophysics

      Volume: 868 Pages: 230083-230083

    • DOI

      10.1016/j.tecto.2023.230083

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Generation of oxidising fluids by comminution of fault rocks2021

    • Author(s)
      Kameda J.、Okamoto A.
    • Journal Title

      Geochemical Perspectives Letters

      Volume: - Pages: 32-35

    • DOI

      10.7185/geochemlet.2131

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 南海トラフ沈み込み帯での熱分解起源メタン・水素の排出と移動2023

    • Author(s)
      鈴木德行・亀田純
    • Organizer
      石油技術協会春季講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 沈み込み帯での熱分解起源のメタンと水素の生成,排出,移動2023

    • Author(s)
      鈴木德行・小池恒太郎・亀田純・木村学
    • Organizer
      日本地質学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 断層ガウジの表面物理化学特性とその断層すべり過程への影響:日本海溝プレート境界断層の例2023

    • Author(s)
      亀井元紀・亀田純・中元啓輔
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Residual gas composition of fault rocks along the ancient subduction zone mega-spray fault: An example from the Nobeoka thrust fault in the Kyushu Shimanto Belt2022

    • Author(s)
      Ryota Hata, Jun Kameda, Yohei Hamada, Asuka Yamaguchi, Noriyuki
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2022 Annual Research Report
  • [Presentation] Sustainable generation of thermogenic CH4/H2 in the underthrust sediments, Nankai Trough2022

    • Author(s)
      Noriyuki Suzuki and Jun Kameda
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2022 Annual Research Report
  • [Presentation] 関東地方での海洋プレートの沈み込みに伴う持続可能な熱分解CH4/H2の生成2022

    • Author(s)
      鈴木德行・亀田 純
    • Organizer
      令和4年度 石油技術協会春季講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Generation of oxidizing fluids by comminution of fault rocks2021

    • Author(s)
      亀田純・岡本敦
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 沈み込み帯と付加体のメタンフラックス ―持続可能な天然ガス資源―2021

    • Author(s)
      鈴木德行
    • Organizer
      第51回石油・石油化学討論会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 地震断層運動に起因するオリビン結晶内の鉄の酸化還元状態変化~地震と地下生命圏のリンケージ~2021

    • Author(s)
      廣瀬丈洋・中田亮一・岡崎啓史・渋谷岳造
    • Organizer
      日本地球化学会第68回年会
    • Related Report
      2021 Annual Research Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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