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study on the formation and accumulation process of microbial methane by highly sensitive methane clumped isotope analysis

Research Project

Project/Area Number 17H01871
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

IJIRI Akira  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 (70374212)

Co-Investigator(Kenkyū-buntansha) ジルベルト アレキシー  東京工業大学, 理学院, 助教 (20726955)
坂井 三郎  国立研究開発法人海洋研究開発機構, 生物地球化学研究分野, 主任技術研究員 (90359175)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Keywords微生物起源メタン / クランプトアイソトープ / 地下生命圏 / メタン / レーザー分光装置 / 天然ガス / 同位体平衡 / 微生物 / 物質循環
Outline of Final Research Achievements

We established a high-precision analytical system for the clumped isotope analysis of methane, and performed clumped isotope analysis of methane sampled from the Minami Kanto Natural Gas Field, and found that methane is a microbial-origin methane produced at low temperatures, and that it produces slowly and reaches isotope equilibrium, similar to biogenic methane previously found in subseafloor. Based on the analysis of clumped isotope of methane obtained from the Kumano Basin mud volcano, it was found that more than 90% of the methane in the mud volcano was produced by microorganisms and that the methane production is promoted by the fluid supply.

Academic Significance and Societal Importance of the Research Achievements

近年、従来の熱分解起源メタンを主成分とする天然ガス資源に対して、微生物起源メタンを主成分とするガス田やメタンハイドレートが注目されている。本研究によって明らかとなった、断層を通じた深部流体の供給によるメタン生成の促進は、我が国の沿岸域をはじめとする海洋プレートの沈み込み帯において初めて示されたメタン生成モデルである。本研究による統合的な分析手法と科学的知見は、今後の海底炭化水素鉱床の探鉱や評価技術の発展に大きく貢献することが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (17 results)

All 2020 2019 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Significance of biogeochemical processes in mud volcanoes2020

    • Author(s)
      井尻暁
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 126 Issue: 1 Pages: 29-37

    • DOI

      10.5575/geosoc.2019.0044

    • NAID

      130007834253

    • ISSN
      0016-7630, 1349-9963
    • Year and Date
      2020-01-15
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Origin of low-chloride fluid in sediments from the eastern continental margin of India, results from the National Gas Hydrate Program Expedition 022019

    • Author(s)
      Ijiri Akira、Haraguchi Satoru、Jimenez-Espejo Francisco Jose、Komai Nobuharu、Suga Hisami、Kinoshita Masataka、Inagaki Fumio、Yamada Yasuhiro
    • Journal Title

      Marine and Petroleum Geology

      Volume: 108 Pages: 377-388

    • DOI

      10.1016/j.marpetgeo.2018.06.014

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uptake of porewater phosphate by REY-rich mud in the western North Pacific Ocean2018

    • Author(s)
      Ijiri, A., Okamura, K., Ohat, J., Nishio, Y., Hamada, Y., Iijima, K., Inagaki, F.
    • Journal Title

      GEOCHEMICAL JOURNAL

      Volume: 52 Issue: 4 Pages: 373-378

    • DOI

      10.2343/geochemj.2.0522

    • NAID

      130007431358

    • ISSN
      0016-7002, 1880-5973
    • Year and Date
      2018-07-31
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deep-biosphere methane production stimulated by geofluids in the Nankai accretionary complex2018

    • Author(s)
      Ijiri Akira et al.
    • Journal Title

      Science Advances

      Volume: 4 Issue: 6 Pages: 4631-4631

    • DOI

      10.1126/sciadv.aao4631

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Clay Mineral Suites in Submarine Mud Volcanoes in the Kumano Forearc Basin, Nankai Trough: Constraints on the Origin of Mud Volcano Sediments2018

    • Author(s)
      Ijiri Akira、Iijima Koichi、Tsunogai Urumu、Ashi Juichiro、Inagaki Fumio
    • Journal Title

      Geosciences

      Volume: 8 Issue: 6 Pages: 220-220

    • DOI

      10.3390/geosciences8060220

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Origin of methane and heavier hydrocarbons entrapped within Miocene methane-seep carbonates from central Japan2018

    • Author(s)
      Miyajima Yusuke、Ijiri Akira、Miyake Akira、Hasegawa Takashi
    • Journal Title

      Chemical Geology

      Volume: 498 Pages: 83-95

    • DOI

      10.1016/j.chemgeo.2018.09.014

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low-temperature clay mineral dehydration contributes to porewater dilution in Bering Sea Slope subseafloor.2018

    • Author(s)
      Ijiri A., Tomioka N., Wakaki S., Masuda H., Shozugawa K., Kim S., Khim B.-K., Murayama M., Matsuo M., Inagaki F.
    • Journal Title

      Frontiers in Earth Science, Biogeoscience

      Volume: 19 Pages: 1-13

    • DOI

      10.3389/feart.2018.00036

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Aerobic and Anaerobic Methanotrophic Communities Associated with Methane Hydrates Exposed on the Seafloor: A High-Pressure Sampling and Stable Isotope-Incubation Experiment2017

    • Author(s)
      Case, D., Ijiri, A., Morono, Y., Tavormina, P., Orphan V. J., and Inagaki, F.
    • Journal Title

      Frontiers in Microbiology

      Volume: 8 Pages: 2569-2569

    • DOI

      10.3389/fmicb.2017.02569

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] レーザー分光によるメタン同位体分子種測定2017

    • Author(s)
      井尻暁
    • Journal Title

      ぶんせき

      Volume: 5 Pages: 200-200

    • Related Report
      2017 Annual Research Report
  • [Presentation] 種子島沖海底泥火山の活動度調査速報2019

    • Author(s)
      井尻暁, 星野辰彦, 北田数也, 土岐知弘, 村山雅史, 野口拓郎, 芦寿一郎
    • Organizer
      日本地質学会第126年学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Fluid flow and diagenetic process in frontal thrust zone off Cape Muroto in the Nankai Trough2019

    • Author(s)
      Ijiri, A., Wakaki, S., Nishio, Y., Hamada, Y., Ishikawa, T., Inagaki, F.
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Trap of deep sourced fluid at gas hydrate in sediments from the Krishna-Godavari Basin, eastern continental margin of India2018

    • Author(s)
      Akira Ijiri, Satoru Haraguchi, Francisco J Jimenez-Espejo, Nobuharu Komai, Hisami Suga, Masataka Kinoshita, Fumio Inagaki, Yasuhiro Yamada
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 熊野海盆海底泥火山噴出堆積物の粘土鉱物組成から推定される泥火山堆積物の起源2018

    • Author(s)
      井尻 暁、飯島 耕一、角皆 潤、芦 寿一郎、稲垣 史生
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Gas Hydrate Formation Associated with Migration of Deep Sourced Fluid in the Krishna-Godavari Basin, Eastern Continental Margin of India2018

    • Author(s)
      Ijiri A, Haraguchi S, Jimenez-Espejo F, Komai N, Suga H, Masataka M, Inagaki F & Yamada Y
    • Organizer
      Goldschmidt 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Secondary Methanogenesis in Dormant Submarine Mud Volcano off Tanegashima Island, Japan2017

    • Author(s)
      Ijiri, A., Toki, T., Agena, K., Hoshino, T., Hagino, K., Hamada, Y., Machiyama, H., Ashi, J., Inagaki, F.
    • Organizer
      Goldschmidt 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 種子島沖海底泥火山群の間隙水の化学組成鉛直プロファイルから見積もられた泥火山の活動状況2017

    • Author(s)
      井尻暁, 濱田洋平, 土岐知弘, 安慶名昂, 星野辰彦, 萩野恭子, 町山栄章, 芦寿一郎,稲垣史生
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 泥火山の微生物活動と生物地球化学過程2017

    • Author(s)
      井尻暁
    • Organizer
      日本地質学会第124年学術大会
    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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