Deep Sea Interdisciplinary Center;
Qingdao National Laboratory for Marine Science and Technology;
Qingdao 266061;
China;
National Deep Sea Center;
Ministry of Natural Resources;
Qingdao 266237;
China;
College of Marine Geosciences;
Ocean University of China;
Qingdao 266100;
China;
volcanic rocks; geochemistry; tectonic evolution; South China Sea; continent-ocean transition zone;