College of Earth Science and Engineering;
Shandong University of Science and Technology;
Qingdao 266590;
China;
Key Laboratory of Marine Geology and Metallogeny;
First Institute of Oceanography;
Ministry of Natural Resources;
Qingdao 266061;
China;
Laboratory for Marine Geology;
Pilot National Laboratory for Marine Science and Technology(Qingdao);
Qingdao 266237;
China;
subducting sediments; IODP Expedition 344; geochemistry; Southern Central American subduction zone;