Analyses of CO_2 and CH_4 concentrations in fluid inclusions and their carbon isotopes

• Project/Area Number: 20840053
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: SHIBUYA Takazo Japan Agency for Marine-Earth Science and Technology, システム地球ラボ, 研究員 (00512906)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,276,000 (Direct Cost: ¥2,520,000、Indirect Cost: ¥756,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥1,716,000 (Direct Cost: ¥1,320,000、Indirect Cost: ¥396,000)
• Keywords: 流体包有物 / 二酸化炭素 / メタン / アルゴン / 海水組成 / 地球史 / 真空破砕抽出 / アルゴン同位体比 / 二酸化炭素濃度 / メタン濃度 / 炭素同位体比

Research Abstract

Fluid inclusions in subseafloor hydrothermal quartz can be a good tool for reconstructing ancient seawater composition through the Earth history because it generally contains seawater component. In this study, we geologized in Tertiary submarine volcanoes to collect samples of hydrothermal quartz. An analytical system was newly developed to extract fluid from the quartz, which was applied to the collected samples. As a result, Tertiary seawater CO_2 concentration that has been independently estimated from other method was reconstruct by using this methods. It is therefore demonstrated that this method is quite useful tor reconstructing ancient seawater composition.

Research Products

• [Journal Article] Imbricated ocean-plate stratigraphy and U-Pb zircon ages from tuff beds in cherts in the Ballantrae Complex, SW Scotland (2010)
  • Author(s): Yusuke Sawaki
  • Journal Title: Geological Society of America Bulletin 122 Pages: 454-464
  • Peer Reviewed
• [Journal Article] Stratigraphy-related, low-pressure metamorphism in the Hardey Syncline, Hamersley Province, Western Australia (2010)
  • Author(s): Takazo Shibuya
  • Journal Title: Gondwana Research (印刷中)
  • Peer Reviewed
• [Journal Article] Are the Taitao granites formed due to subduction of the Chile ridge? (2009)
  • Author(s): Anma, R., Armstrong, R., Orihashi, Y., Ike, S., Shin, K., Kon, Y., Komiya, T., Ota, T., Kagashima, S., Shibuya, T., Yamamoto, S., Voloso, E.E., Funning, M., Herve, F.
  • Journal Title: Lithos 113 Pages: 246-258
  • NAID: 120007131260
  • Peer Reviewed
• [Journal Article] Variability in microbial communities in black smoker chimneys at the NW caldera vent field, Brothers volcano, Kermadec arc. (2009)
  • Author(s): Takai, K., Nunoura, T., Horikoshi, K., Shibuya, T., Nakamura, K., Suzuki, Y., Stott, M., Massoth, G.J., Christenson, B.W., de Ronde, C.E.J., Butterfield, D.A., Ishibashi, J., Lupton, J.E., Evans, L.J.
  • Journal Title: Geomicrobiology Journal 26 Pages: 552-569
  • Peer Reviewed
• [Journal Article] H2 generation by experimental hydrothermal alteration of komatiitic glass at 300℃ and 500 bars (2009)
  • Author(s): Yoshizaki, M., Shibuya, T., Suzuki, K., Shimizu, K., Nakamura, K., Takai, K., Omori, S., Maruyama, S.
  • Journal Title: A preliminary result from on-going experiment. Geochemical Journal 43
  • Peer Reviewed
• [Journal Article] H_2 generation by experimental hydrothermal alteration of komatiitic glass at 300℃ and 500 bars : A preliminary result from on-going experiment (2009)
  • Author(s): Motoko Yoshizaki
  • Journal Title: Geochemical Journal 43
  • Peer Reviewed
• [Journal Article] Are the Taitao granites formed due to subduction of the Chile ridge (2009)
  • Author(s): Ryo Anma
  • Journal Title: Lithos 113 Pages: 246-258
  • Peer Reviewed
• [Journal Article] Variability in microbial communities in black smoker chimneys at the NW caldera ventfield, Brothers volcano, Kermadec arc (2009)
  • Author(s): Ken Takai
  • Journal Title: Geomicrobiology Journal 26 Pages: 552-569
  • Peer Reviewed
• [Journal Article] The youngest blueschist belt in SW Japan: implication for the exhumation of the Cretaceous Sanbagawa high-P/T metamorphic belt. (2008)
  • Author(s): Aoki, K., Itaya, T., Shibuya, T., Masago, H., Kon, Y., Terabayashi, M., Kaneko, Y., Kawai, T., Maruyama, S.
  • Journal Title: Journal of Metamorphic Geology 26 Pages: 583-602
  • Peer Reviewed
• [Journal Article] Large P-T gap between Ballantrae blueschist/garnet pyroxenite and surrounding ophiolite, southern Scotland, UK: Diapiric exhumation of a Caledonian serpentinite melange. (2008)
  • Author(s): Kawai, T., Windley, B.F., Shibuya, T., Omori, S., Sawaki, Y., Maruyama, S.
  • Journal Title: Lithos 104 Pages: 337-354
  • Peer Reviewed
• [Journal Article] Evolution of the composition of seawater through geologic time, and its influence on the evolution of life. (2008)
  • Author(s): Komiya, T., Hirata, T., Kitajima, K., Yamamoto, S., Shibuya, T., Sawaki, Y., Ishikawa, T., Shu, D., Li, Y., Han, J.
  • Journal Title: Gondwana Research 14 Pages: 159-174
  • Peer Reviewed
• [Journal Article] Geological background of the Kairei and Edmond hydrothermal fields along the Central Indian Ridge: Implications of their vent fluids' distinct chemistry. (2008)
  • Author(s): Kumagai, H., Nakamura, K., Toki, T., Morishita, T., Okino, K., Ishibashi, J.-i., Tsunogai, U., Kawagucci, S., Gamo, T., Shibuya, T., Sawaguchi, T., Neo, N., Joshima, M., Sato, T., Takai, K.
  • Journal Title: Geofluids 8 Pages: 239-251
  • Peer Reviewed
• [Presentation] Middle Archean CO2 flux into oceanic crust from ocean. (2009)
  • Author(s): Shibuya, T., Tahata, M., Ueno, Y., Komiya, T., Yoshida, N., Maruyama, S.
  • Organizer: 19th Annual VM Goldschmidt Conference 2009
  • Place of Presentation: Davos, Switzerland
  • Year and Date: 2009-06-22
• [Presentation] Middle Archean CO_2 flux into oceanic crust from ocean (2009)
  • Author(s): 渋谷岳造
  • Organizer: Goldschmidt Conference 2009
  • Place of Presentation: Switzerland, Davos, Congress Center
  • Year and Date: 2009-06-22
• [Presentation] 太古代における海洋から海洋地殻へのCO2フラックス. (2009)
  • Author(s): 渋谷岳造, 田畑美幸, 上野雄一郎, 小宮剛, 吉田尚弘, 高井研, 丸山茂徳
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 幕張メッセ, 千葉
  • Year and Date: 2009-05-18
• [Presentation] 太古代における海洋から海洋地殻へのCO_2フラックス (2009)
  • Author(s): 渋谷岳造
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 千葉県、幕張、幕張メッセ
  • Year and Date: 2009-05-18
• [Presentation] CO2 concentration of fluid inclusions in hydrothermal quartz: evidence for Archean CO2-rich seawater. (2009)
  • Author(s): Shibuya, T., Ueno, Y., Komiya, T., Yoshida, N., Maruyama, S.
  • Organizer: Precambrian World 2009, Nishijin Plaza
  • Place of Presentation: Fukuoka
  • Year and Date: 2009-03-08
• [Presentation] Archean alkaline hydrothermal fluid and chert genesis. (2008)
  • Author(s): Shibuya, T., Komiya, T., Nakamura, K., Takai, K., Maruyama, S.
  • Organizer: 7th International Symposium for Subsurface Microbiology, Shizuoka Convention & Art Center "GRANSHIP"
  • Place of Presentation: Shizuoka
  • Year and Date: 2008-11-17
• [Presentation] Evidence for Archean CO2-rich seawater from fluid inclusions in hydrothermal quartz. (2008)
  • Author(s): Shibuya, T., Ueno, Y., Komiya, T., Yoshida, N., Maruyama, S.
  • Organizer: International symposium of "From Genome to Snowball Earth, Metazoan Evolution and Habitable Planets: Multidisciplinary Relations
  • Place of Presentation: Kagakumirai-kan, Odaiba, Tokyo
  • Year and Date: 2008-09-30
• [Presentation] 太古代のアルカリ性熱水. (2008)
  • Author(s): 渋谷岳造, 小宮剛, 中村謙太郎, 高井研, 丸山茂徳
  • Organizer: 日本地質学会第115年学術大会
  • Place of Presentation: 秋田大学手形キャンパス, 秋田
  • Year and Date: 2008-09-22
• [Remarks] 日本経済新聞掲載(2010/4/25) (ナゾ謎かがく:鉄鉱石は光合成でできた?「定説」補う新仮説が登場)