Carbon, oxygen, and strontium isotopic composition of methane-derived authigenic carbonates in methane seep areas, eastern margin of Japan Sea

Yoshihiro Kakizaki1, Tsuyoshi Ishikawa2, Akihiro Hiruta1 and Ryo Matsumoto3, (1)Meiji University, Kawasaki, Japan, (2)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (3)Meiji University, Gas Hydrate Research Laboratory, Tokyo, Japan