School of Earth and Environmental Science, Seoul National University, Seoul, Republic of Korea;
School of Earth and Environmental Science, Seoul National University, Seoul, Republic of Korea;
Deep-sea & Marine Georesources Research Department, Korea Ocean Research & Development Institute, Ansan P.O. Box 29, Seoul 425-600, Republic of Korea;
Deep-sea & Marine Georesources Research Department, Korea Ocean Research & Development Institute, Ansan P.O. Box 29, Seoul 425-600, Republic of Korea;