The geochemical characteristics and sedimentary environment of abyss and hadal sediments of Yap-trench

Yuhuan Huang1, Mengqi Wang1, ChengJun Sun2, Guipeng Yang1 and Haibing Ding3, (1)Ocean University of China, Qingdao, China, (2)First Institute of Oceanography, State Oceanic Administration, Qingdao, China, (3)Ocean University of China, Key Laoboratory of Marine Chemistry and Technology, Ministry of Education, Qingdao, China