Key Laboratory of Submarine Geosciences;
Second Institute of Oceanography;
State Oceanic Administration;
Hangzhou 310012;
China;
Qingdao Institute of Marine Geology;
Qingdao 266071;
China;
China University ofGeosciences (Beijing);
Beijing 100083;
China;
China Ocean Mineral Resources Research and DevelopmentAssociation;
Beijing 100860;
China;
Woods Hole Oceanographic Institution;
Woods Hole;
MA 02543;
USA;