Dating of barite and anhydrite in sea-floor hydrothermal deposits in the Okinawa Trough
Fujiwara Taisei1, Shin Toyoda1, Ai Uchida1, Jun-Ichiro Ishibashi2, Shuhei Totsuka2, Kazuhiko Shimada2 and Shun'ichi Nakai3, (1)Okayama University of Science, Okayama, Japan, (2)Kyushu University, Fukuoka, Japan, (3)University of Tokyo, Bunkyo-ku, Japan