TY - JOUR

T1 - IODP Expedition 337

T2 - Deep Coalbed Biosphere off Shimokita - Microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean

AU - Inagaki, Fumio

AU - Hinrichs, Kai-Uwe

AU - Kubo, Yusuke

AU - and the IODP Expedition 337 Scientists

AU - Bihan, Monika

AU - Bowden, Stephen A.

AU - Bowles, Marshall

AU - Elvert, Marcus

AU - Glombitza, Clemens

AU - Gross, Doris

AU - Harrington, Guy J.

AU - Heuer, Verena

AU - Hong, Wei Li

AU - Hori, Tomoyuki

AU - Hoshino, Tatsuhiko

AU - Ijiri, Akira

AU - Imachi, Hiroyuki

AU - Ito, Motoo

AU - Kaneko, Masanori

AU - Lever, Mark A.

AU - Li, Kevin

AU - Limmer, David

AU - Lin, Yu Shih

AU - Liu, Chang Hong

AU - Methé, Barbara A.

AU - Morita, Sumito

AU - Morono, Yuki

AU - Murayama, Masafumi

AU - Ohkouchi, Naohiko

AU - Ono, Shuhei

AU - Park, Young Soo

AU - Phillips, Stephen C.

AU - Prieto-Mollar, Xavier

AU - Purkey, Marcella

AU - Riedinger, Natascha

AU - Sanada, Yoshinori

AU - Sauvage, Justine

AU - Snyder, Glen

AU - Susilawati, Rita

AU - Takano, Yoshinori

AU - Tanikawa, Wataru

AU - Tasumi, Eiji

AU - Terada, Takeshi

AU - Tomaru, Hitoshi

AU - Trembath-Reichert, Elizabeth

AU - Wang, David T.

AU - Yamada, Yasuhiro

N1 - Publisher Copyright: © 2016 Author(s).

PY - 2016/6/27

Y1 - 2016/6/27

N2 - The Integrated Ocean Drilling Program (IODP) Expedition 337 was the first expedition dedicatedto subseafloor microbiology that used riser-drilling technology with the drilling vessel Chikyu. The drilling SiteC0020 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 relationshipbetween the deep microbial biosphere and a series of 2 km deep subseafloor coalbeds and to explorethe limits of life in the deepest horizons ever probed by scientific ocean drilling. To address these scientificobjectives, we penetrated a 2.466 km deep sedimentary sequence with a series of lignite layers buried around2 km below the seafloor. The cored sediments, as well as cuttings and logging data, showed a record of dynamicallychanging depositional environments in the former forearc basin off the Shimokita Peninsula during the lateOligocene 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 bottomof the hole by microbiological and biogeochemical analyses. The factors controlling the size and viabilityof ultra-deep microbial communities in those warm sedimentary habitats could be the increase in demand ofenergy and water expended on the enzymatic repair of biomolecules as a function of the burial depth. Expedition337 provided a test ground for the use of riser-drilling technology to address geobiological and biogeochemicalobjectives and was therefore a crucial step toward the next phase of deep scientific ocean drilling.

AB - The Integrated Ocean Drilling Program (IODP) Expedition 337 was the first expedition dedicatedto subseafloor microbiology that used riser-drilling technology with the drilling vessel Chikyu. The drilling SiteC0020 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 relationshipbetween the deep microbial biosphere and a series of 2 km deep subseafloor coalbeds and to explorethe limits of life in the deepest horizons ever probed by scientific ocean drilling. To address these scientificobjectives, we penetrated a 2.466 km deep sedimentary sequence with a series of lignite layers buried around2 km below the seafloor. The cored sediments, as well as cuttings and logging data, showed a record of dynamicallychanging depositional environments in the former forearc basin off the Shimokita Peninsula during the lateOligocene 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 bottomof the hole by microbiological and biogeochemical analyses. The factors controlling the size and viabilityof ultra-deep microbial communities in those warm sedimentary habitats could be the increase in demand ofenergy and water expended on the enzymatic repair of biomolecules as a function of the burial depth. Expedition337 provided a test ground for the use of riser-drilling technology to address geobiological and biogeochemicalobjectives and was therefore a crucial step toward the next phase of deep scientific ocean drilling.

UR - http://www.scopus.com/inward/record.url?scp=84976474142&partnerID=8YFLogxK

U2 - 10.5194/sd-21-17-2016

DO - 10.5194/sd-21-17-2016

M3 - Article

AN - SCOPUS:84976474142

VL - 21.2016

SP - 17

EP - 28

JO - Scientific Drilling

JF - Scientific Drilling

SN - 1816-8957

ER -