Relationship between crustal degassing and microbial mineralization in active mud volcanoes, hydrocarbon seeps, and other environments

• 研究課題/領域番号: 21K03739
• 研究種目: 基盤研究(C)
• 配分区分: 基金
• 応募区分: 一般
• 審査区分: 小区分17050:地球生命科学関連
• 研究機関: 東京大学
• 研究代表者: Snyder Glen 東京大学, 大気海洋研究所, 特任研究員 (90751777)
• 研究分担者: 柿崎 喜宏 東京大学, 大学院理学系研究科(理学部), 特任研究員 (20570633) ; 白石 史人 広島大学, 先進理工系科学研究科(理), 准教授 (30626908) ; 松本 良 明治大学, 研究・知財戦略機構(生田), 研究推進員(客員研究員) (40011762) ; 戸丸 仁 千葉大学, 大学院理学研究院, 准教授 (80588244) ; 高畑 直人 東京大学, 大気海洋研究所, 助教 (90345059) ; 伊地知 雄太 東京大学, 大学院理学系研究科(理学部), 特任研究員 (10911258)
• 研究期間 (年度): 2021-04-01 – 2024-03-31
• 研究課題ステータス: 完了 (2023年度)
• 配分額: 4,030千円 (直接経費: 3,100千円、間接経費: 930千円); 2023年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円); 2022年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円); 2021年度: 1,560千円 (直接経費: 1,200千円、間接経費: 360千円)
• キーワード: methane / authigenic / carbonate / noble gas / stable isotope / Japan Sea / gas seep / methane oxidation / gas hydrate / cold seep / noble gas isotopes / helium / argon / stable isotopes / dolomite / calcite / authigenic carbonate / helium isotopes / protodolomite / EPS / microbial methane / thermogenic methane / Mud volcano / Methane / Dolomite / Noble gas / Stable Isotope

研究開始時の研究の概要

Microdolomites are found in a variety of extreme environments. Research involving the relationship between crustal degassing and microbial mineralization on should tell us about the conditions leading to the development of these unusual mineral deposits, possibly even on other planets such as Mars.

研究実績の概要

This year we continued sampling and analyses of methane-derived authigenic carbonates (MDACs) and the seep water associated with them. For offshore Japan Sea samples, we used more archived samples. Sampling was also carried out on shore-based seeps from Mobara, in Chiba Prefecture. In addition to the previous years sampling, we employed methane sensors in the seep area to determine real-time methane concentrations and compare them with those of dissolved gas that was analyzed in the laboratory. The sampling allowed us to determine noble gas and stable carbon isotopes and to highlight the differences between gas seeps in Sea of Japan versus on the Pacific side. We also analyzed samples we had collected from seep sites in Tatar Strait 5 years ago, which provide an indicator of how seep compositions are site-specific .

研究成果

• [雑誌論文] 日本周辺海域におけるメタンハイドレートの分布，産状と起源 (2024)
  • 著者名/発表者名: 松本良、蛭田明宏、大井剛志、柿崎喜宏、下野貴他、石田直人、サイディマッソウ、シュナイダグレン、戸丸仁、福田朱里、弘松峰男、大川史郎、柳本裕、棚橋学、角和善隆
  • 雑誌名: 地学雑誌 巻: 133 号: 2 ページ: 63-89
  • DOI: 10.5026/jgeography.133.63
  • ISSN: 0022-135X, 1884-0884
  • 年月日: 2024-04-25
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Ocean Dynamics and Methane Plume Activity in Tatar Strait, Far Eastern Federal District, Russia as Revealed by Seawater Chemistry, Hydroacoustics, and Noble Gas Isotopes (2022)
  • 著者名/発表者名: Snyder, G.T., Yatsuk, A., Takahta, N., Shakirov, R., Tomaru, H., Tanaka, K., Obzhirov, A., Salomatin, A., Aoki, S., Khazanova, E., Maryina, E., Sano, Y, Matsumoto, R.
  • 雑誌名: Frontiers in Earth Science 巻: 10 ページ: 1-21
  • DOI: 10.3389/feart.2023.1188142
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Geochemical distribution of helium, hydrogen, carbon dioxide, and methane in Sakhalin Island mud volcanoes, hot springs, and cold seeps (2022)
  • 著者名/発表者名: Syrbu, N.S., Snyder, G.T., Shakirov, R.B., Kholmogorov, A.O., Zharkov, R.V., Tsunogai, U.
  • 雑誌名: Journal of Volcanology and Geothermal Research 巻: 431 ページ: 1-11
  • DOI: 10.1016/j.jvolgeores.2022.107667
  • 査読あり / 国際共著
• [雑誌論文] Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean (2022)
  • 著者名/発表者名: Yatsuk, A., Gresov, A., G.T. Snyder
  • 雑誌名: Frontiers in Earth Science 巻: 10 ページ: 1-19
  • DOI: 10.3389/feart.2022.856496
  • 査読あり / オープンアクセス / 国際共著
• [学会発表] Project COESS: Sensors and equipment used with the Fugro Environmental Landers for time-series scientific data acquisition near active seeps and vents.(Poster) (2024)
  • 著者名/発表者名: Shinsuke Aoki, Hitoshi Tomaru, Satoko Owari, Ryo Matsumoto, Teresa Nakajima Escobar, Glen Snyder
  • 学会等名: UN Ocean Decade for Sustainable Science annual conference, Barcelona, Spain
• [学会発表] [SGC37-06] Project COESS and the tracing of seafloor volatiles: An action plan for the UN Decade of Ocean Science for Sustainable Development (2023)
  • 著者名/発表者名: Glen Snyder, Ryo Matsumoto, Hitoshi Tomaru, Fumito Shiraishi, Shiono Miki, Yuji Sano, Ma Teresa Nakajima
  • 学会等名: Japan Geoscience Annual Meeting
  • 招待講演
• [学会発表] Hydrocarbon seep dynamics revealed by noble gas and stable isotope analysis of gas inclusions of authigenic carbonates: A comparison of samples from Tatar Strait, Russia; Joetsu Basin, Japan; and Brejo do Espinho, Brazil. (2022)
  • 著者名/発表者名: Snyder, G., Takahata, N., Bowden, S.A., Zhang, N., Shakirov, R.B., Tomaru, H., Shiraishi, F., Sano, Y., Matsumoto, R.
  • 学会等名: Japan Geoscience Union Meeting, 2022
  • 招待講演
• [学会発表] Characteristics of microdolomite associated with gas hydrate (2022)
  • 著者名/発表者名: Shiraishi, F., Akimto, T., Tomioka, N., Takahashi, Y., Matsumoto, R., Snyder, G.
  • 学会等名: Japan Geoscience Union Meeting, 2022
• [備考] Project COESS
  • URL: https://sites.google.com/view/coessproject/home
• [備考] From Cold Seeps to Hydrothermal Vents
  • URL: https://www.frontiersin.org/research-topics/47648/from-cold-seeps-to-hydrothermal-vents-geology-chemistry-microbiology-and-ecology-in-marine-and-coastal-environments