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2003 Fiscal Year Final Research Report Summary

Sulfur isotopic exchange between chemosynthetic microbes and sulfur-bearing minerals in seafloor hydrothermal systems

Research Project

Project/Area Number 13304043
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionThe University of Tokyo

Principal Investigator

URABE Tetsuro  The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (50107687)

Co-Investigator(Kenkyū-buntansha) KOGURE Toshihiro  The University of Tokyo, Graduate School of Science, Associate Professor, 大学院・理学系研究科, 助教授 (50282728)
MURAKAMI Takashi  The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (00253295)
MATSUMOTO Ryo  The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (40011762)
OGIHARA Shigenori  The University of Tokyo, Graduate School of Science, Research Associate, 大学院・理学系研究科, 助手 (50214044)
ENDO Kazuyoshi  University of Tsukuba, Graduate school of Life and Environmental Science, Associate Professor, 地球科学系, 助教授 (80251411)
Project Period (FY) 2001 – 2003
Keywordshydrothermal site / Deep biosphere / hydrate / seep / sulfur / isotope / Kuroko / chemosynlheais
Research Abstract

We conducted research to explore seafloor hydrothermal sites, cold seep zone on seafloor, sub-seafloor gas hydrate, and fossil seafloor hydrothermal activity to elucidate the geochemical and microbiological processes. We obtained following conclusions:
(1)Sulfate and sulfide minerals in the Suiyo Seamount, Izu-Bonin Arc, Western Pacific are formed from seawater sulfate and magmatic sulfide sulfur, respectively, and no biogenic signature was identified in the sulfide minerals despite the fact that the sulfur reducing bacteria is dominant in the sediments near the hydrothermal area.
(2)Hydrogen isotopic analysis of the interstitial water at the Hydrate Ridge, Cascadia Margin of North America indicate that the methane seep is accompanied with fluid which was derived from decomposition of gas hydrate. Therefore, high methane flux of the area does not necessarily indicate high rate of methane hydrate formation at depth.
(3)Heavy sulfur isotopic value of pyrite in sediments from McKenzie Delta, Northwestern Territories, Canada suggests its seawater sulfate origin under closed or semi-closed environment. This idea matches with the observation of sea-level rise and fall in the district.
(4)Organic geochemical analysis on bacterial matte at methane seep off Tokai coast indicate that the biomarkers are the mixture of algae, aerobic bacteria, and methane-oxidizing Archaea.
(5)Kuroko deposit is the fossil seafloor hydrothermal deposit of Japan Arc in Miocene age. So-called Brown Ore which is characterized by its gold and silver-rich assay occurs on the periphery of the massive sulfide ore of the Kuroko deposits affected by microbial activity of the hydrothermal system.
(6)All the results indicate that the mass spectroscopic analysis is the most powerful tool to discriminate the biological activity of the hydrothermal system in the past and present-day seafloor.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Yoshihiro Tsuji, Hisashi Ishida, Masaru Nakamizu, Ryo Matsumoto: "Overview of MITI Nankai Trough Wells : A Milestone in the Evaluaton of Methane Hydrate Resources"RESOURCE GEOLOGY. 54. 3-10 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshida Hiroki, Kazue Watanabe, Ryo Matsumoto: "Lithology, Biostratigraphy, and Magnetostratigraphy of Gas Hydrate-Bearing Sediments in the Eastern Nankai Trough"RESOURCE GEOLOGY. 54. 25-34 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] HitoshiTomaru, Ryo Matsumoto, Hailong Lu, Takashi Uchida: "Geoshemical Process of Gas Hydrate Formation in the Nankai Trough Based on Choride and Isotopic Anomalies in Interstitial Water"RESOURCE GEOLOGY. 54. 45-52 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshinori Takano, Kensei Kobayashi, Toshiro Yamanaka, Katsuni Maumo, Tetsuro Urabe: "Amino acids in the 308℃ deep-sea hydrothermal system of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean"Earth and Planetary Science Letters. 219. 147-153 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsunori Nakagawa, Jun-Ichiro Ishibashi, Akihiko Mayuyama, Toshiro Yamanaka, Yusuke Morimoto, Hiroyuki Kimura, Tetsuro Urabe, Manabu Fukui: "Analysis of Dissimilatory Sulfite Reductase and 16S rRNA Gene Fragments from Deep-Sea Hydrothermal Sites of the Suiyo Seamount, Izu-Bonin Arc, Western Pacific"APPLIED AND ENVIRONMENTAL MICROBLOGY. 70. 393-403 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yowske Higashi, Michinari Sunamura, Keiko Kitamura, Ko-ichi Nakamura, Yasuro Kurusu, Jun-ichiro Ishibashi, Tetsuro Urabe, Akihiko Maruyama: "Microbial diversity in hydrothermal surface to subsurface environments of Suiyo Seamount, Izu-Bonin Arc, using a catherter-type in situ grouwth chamber"FEMS Microbiology Ecology. 47. 327-336 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshihiro Tsuji, Hisashi Ishida, Masaru Nakamizu, Ryo Matsumoto: "Overview of MITI Nankai Trough Wells : A Milestone in the Evaluation of Methane Hydrate Resources"RESOURCE GEOLOGY. 54. 3-10 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshida Hiroki, Kazue Watanabe, Ryo Matsumoto: "Lithology, Biostratigraphy, and Magnetostratigraphy of Gas Hydrate-Bearing Sediments in the Eastern Nankai Trough"RESOURCE GEOLOGY. 54. 25-34 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hitoshi Tomaru, Ryo Matsumoto, Hailong Lu, Takashi Uchida: "Geochemical Process of Gas Hydrate Formation in the Nankai Trough Based on Chloride and Isotopic Anomalies in Interstitial Water"RESOURCE GEOLOGY. 54. 45-52 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshinori Takano, Kensei Kobayashi, Toshiro Yamanaka, Katsuni Maumo, Tetsuro Urabe: "Am ino acids in the 308℃deep-sea hydrothermal system of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean"Earth and Planetary Science Letters. 219. 147-153 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsunori Nakagawa, Jun-Ichiro Ishibashi, Akihiko Mayuyama, Toshiro Yamanaka, Yusuke Morimoto, Hiroyuki Kimura, Tetsuro Urabe, Manabu Fukui: "Analysis of Dissimilatory Sulfite Reductase and 16S rRNA Gene Fragments from Deep-Sea hydrothermal Sites of the Suiyo Seamount, Izu-Bonin Arc, Western Pacific"APPLIED AND ENVIRONMENTAL MICROBLOGY. 70. 393-403 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yowske Higashi, Michinari Sunamura, Keiko Kitamura, Ko-ichi Nakamura, Yasuro Kurusu, Jun-ichiro Ishibashi, Tetsuro Urabe, Akihiko Maruyama: "Microbial diversity in hydrothermal surface to subsurface environments of Suiyo Seamount, Izu-Bonin Arc, using a catherter-type in situ grouwth chamber"FEMS Microbiology Ecology. 47. 327-336 (2004)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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