Deep-biosphere methane production stimulated by geofluids in the Nankai accretionary complex.

Autor: Ijiri A; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Inagaki F; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan.; Research and Development Center for Ocean Drilling Science, JAMSTEC, Yokohama 236-0001, Japan., Kubo Y; Center for Deep Earth Exploration, JAMSTEC, Yokohama 236-0001, Japan., Adhikari RR; Department of Earth and Environmental Sciences, University of Potsdam, D-14476 Potsdam-Golm, Germany., Hattori S; Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan., Hoshino T; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Imachi H; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan.; Department of Subsurface Geobiological Analysis and Research, JAMSTEC, Yokosuka 237-0061, Japan., Kawagucci S; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan.; Department of Subsurface Geobiological Analysis and Research, JAMSTEC, Yokosuka 237-0061, Japan., Morono Y; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Ohtomo Y; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Ono S; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA., Sakai S; Department of Subsurface Geobiological Analysis and Research, JAMSTEC, Yokosuka 237-0061, Japan., Takai K; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan.; Department of Subsurface Geobiological Analysis and Research, JAMSTEC, Yokosuka 237-0061, Japan.; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan., Toki T; Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan., Wang DT; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA., Yoshinaga MY; MARUM and Department of Geosciences, University of Bremen, D-28334 Bremen, Germany., Arnold GL; Center for Geomicrobiology, Department of Biological Sciences, Aarhus University, DK-8000 Aarhus C, Denmark., Ashi J; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-0885, Japan., Case DH; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA., Feseker T; MARUM and Department of Geosciences, University of Bremen, D-28334 Bremen, Germany., Hinrichs KU; MARUM and Department of Geosciences, University of Bremen, D-28334 Bremen, Germany., Ikegawa Y; Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Chiba 270-1194, Japan., Ikehara M; Center for Advanced Marine Core Research, Kochi University, Nankoku, Kochi 783-8502, Japan., Kallmeyer J; Department of Earth and Environmental Sciences, University of Potsdam, D-14476 Potsdam-Golm, Germany., Kumagai H; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Lever MA; Center for Geomicrobiology, Department of Biological Sciences, Aarhus University, DK-8000 Aarhus C, Denmark., Morita S; Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan., Nakamura KI; AIST, Tsukuba 305-8567, Japan., Nakamura Y; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-0885, Japan., Nishizawa M; Department of Subsurface Geobiological Analysis and Research, JAMSTEC, Yokosuka 237-0061, Japan., Orphan VJ; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA., Røy H; Center for Geomicrobiology, Department of Biological Sciences, Aarhus University, DK-8000 Aarhus C, Denmark., Schmidt F; MARUM and Department of Geosciences, University of Bremen, D-28334 Bremen, Germany., Tani A; Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan., Tanikawa W; Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi 783-8502, Japan.; Research and Development Center for Submarine Resources, JAMSTEC, Yokosuka 237-0061, Japan., Terada T; Marine Works Japan Ltd., Yokosuka 237-0063, Japan., Tomaru H; Department of Earth Sciences, Graduate School of Science, Chiba University, Chiba 263-8522, Japan., Tsuji T; Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395, Japan.; International Institute for Carbon-Neutral Energy Research, Department of Earth Resources Engineering, Kyushu University, 744 Motooka, Fukuoka-shi, Fukuoka 819-0395, Japan., Tsunogai U; Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan., Yamaguchi YT; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-0885, Japan.; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan., Yoshida N; Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan.; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2018 Jun 13; Vol. 4 (6), pp. eaao4631. Date of Electronic Publication: 2018 Jun 13 (Print Publication: 2018).
DOI: 10.1126/sciadv.aao4631
Abstrakt: Microbial life inhabiting subseafloor sediments plays an important role in Earth's carbon cycle. However, the impact of geodynamic processes on the distributions and carbon-cycling activities of subseafloor life remains poorly constrained. We explore a submarine mud volcano of the Nankai accretionary complex by drilling down to 200 m below the summit. Stable isotopic compositions of water and carbon compounds, including clumped methane isotopologues, suggest that ~90% of methane is microbially produced at 16° to 30°C and 300 to 900 m below seafloor, corresponding to the basin bottom, where fluids in the accretionary prism are supplied via megasplay faults. Radiotracer experiments showed that relatively small microbial populations in deep mud volcano sediments (10 2 to 10 3 cells cm -3 ) include highly active hydrogenotrophic methanogens and acetogens. Our findings indicate that subduction-associated fluid migration has stimulated microbial activity in the mud reservoir and that mud volcanoes may contribute more substantially to the methane budget than previously estimated.
Databáze: MEDLINE
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