Geochemical evidences of methane hydrate dissociation in Alaskan Beaufort Margin during Holocene

Masao Uchida1, Stephan Rella1, Yoshimi Kubota2, Hidetoshi Kumata3, Kanako Mantoku1, Shigeto Nishino4 and Motoyo Itoh4, (1)National Institute for Environmental Studies, Tsukuba, Japan, (2)National Museum of Nature and Science, Tsukuba, Japan, (3)Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan, (4)Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan