IODP Expedition 337; deep coalbed biosphere off Shimokita; microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean

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doi: 10.5194/sd-21-17-2016
Author(s): Inagaki, Fumio; Hinrichs, Kai-Uwe; Kubo, Yusuke; Bihan, M.; Bowden, S. A.; Bowles, M.; Elvert, M.; Glombitza, C.; Gross, D.; Harrington, G. J.; Heuer, V.; Hong, W. L.; Hori, T.; Hoshino, T.; Ijiri, A.; Imachi, H.; Ito, M.; Kaneko, M.; Lever, M. A.; Li, K.; Limmer, D.; Lin, Y. S.; Liu, C. H.; Methé, B. A.; Morita, S.; Morono, Y.; Murayama, M.; Ohkouchi, N.; Ono, S.; Park, Y. S.; Phillips, S. C.; Prieto-Mollar, X.; Purkey, M.; Riedinger, N.; Sanada, Y.; Sauvage, J.; Snyder, G.; Susilawati, R.; Takano, Y.; Tanikawa, W.; Tasumi, E.; Terada, T.; Tomaru, H.; Trembath-Reichert, E.; Wang, D. T.; Yamada, Y.
Integrated Ocean Drilling Program, Expedition 337 Scientists, College Station, TX
Author Affiliation(s): Primary:
Japan Agency for Marine-Earth Science and Technology, Kochi Institute for Core Sample Research, Kochi, Japan
University of Bremen, Germany
Volume Title: Scientific Drilling
Source: Scientific Drilling, Vol.21, p.17-28. Publisher: Copernicus GmbH on behalf of the German Research Centre for Geosciences (GFZ), Gottingen, International. ISSN: 1816-8957
Note: In English. 47 refs.; illus., incl. strat. cols., sketch map
Summary: The Integrated Ocean Drilling Program (IODP) Expedition 337 was the first expedition dedicated to subseafloor microbiology that used riser-drilling technology with the drilling vessel Chikyu. The drilling Site C0020 is located in a forearc basin formed by the subduction of the Pacific Plate off the Shimokita Peninsula, Japan, at a water depth of 1180 m. Primary scientific objectives during Expedition 337 were to study the relationship between the deep microbial biosphere and a series of ∼ 2 km deep subseafloor coalbeds and to explore the limits of life in the deepest horizons ever probed by scientific ocean drilling. To address these scientific objectives, we penetrated a 2.466 km deep sedimentary sequence with a series of lignite layers buried around 2 km below the seafloor. The cored sediments, as well as cuttings and logging data, showed a record of dynamically changing depositional environments in the former forearc basin off the Shimokita Peninsula during the late Oligocene and Miocene, ranging from warm-temperate coastal backswamps to a cool water continental shelf. The occurrence of small microbial populations and their methanogenic activity were confirmed down to the bottom of the hole by microbiological and biogeochemical analyses. The factors controlling the size and viability of ultra-deep microbial communities in those warm sedimentary habitats could be the increase in demand of energy and water expended on the enzymatic repair of biomolecules as a function of the burial depth. Expedition 337 provided a test ground for the use of riser-drilling technology to address geobiological and biogeochemical objectives and was therefore a crucial step toward the next phase of deep scientific ocean drilling.
Year of Publication: 2016
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Aliphatic hydrocarbons; Alkanes; Aomori Japan; Asia; Basins; Biochemistry; Biochronology; Biodiversity; Biogenic processes; Biosphere; Biostratigraphy; Burial; Coal; Coal seams; Communities; Composition; Cores; Depositional environment; Depth; Downhole methods; Drilling; Drilling muds; Electron microscopy data; Expedition 337; Far East; Fore-arc basins; Genesis; Geochemistry; Geomicrobiology; Habitat; Honshu; Hydrocarbons; Integrated Ocean Drilling Program; Japan; Lignite; Lithostratigraphy; Marine geology; Methane; Microorganisms; Molecular biology; North Pacific; Northwest Pacific; Ocean floors; Organic compounds; Pacific Ocean; Physical properties; Populations; Porosity; Productivity; SEM data; Sedimentary rocks; Shimokita Peninsula; Stratigraphic units; Stratigraphy; Taxonomy; Technology; Well-logging; West Pacific
Coordinates: N411035 N411036 E1421202 E1421201
Record ID: 2017047294
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany