JpGU-AGU Joint Meeting 2017

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[JJ] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS16] [JJ] Gas hydrates in environmental-resource sciences

Mon. May 22, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Hitoshi Tomaru(Department of Earth Sciences, Chiba University), Akihiro Hachikubo(Environmental and Energy Resources Research Center, Kitami Institute of Technology), Sumito Morita(Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Atsushi Tani(Graduate School of Human Development and Environment, Kobe University)

[MIS16-P09] Ionic analusis of seawater and interstitial water in methane hydrate fields off Sain'in region of estern Honshu, Japan

*Tatsuya Motegi1, Naoto Ishida1, Takao Ebinuma1 (1.Department of Management of Social Systems and Civil Engineering, Graduate School of Engineering, Tottori University)

Keywords:Methane hydrate, Interstitial water

In order to assess geochemical condition, we measured dissolved ion of seawater and interstitial water in methane hydrate fields off San’in region of western Honshu, Japan. Sediment samples were obtained in Tsushima Basin, Yamato Basin and Oki Trough using in July 2016. The methane flux in study area is comparatively high. Although methane hydrate has not been recovered in study sites, methane hydrate is probably embedded in deeper horizons, as indicated by chloride concentrations.