Contribution of Mountain River Materials to the Continental Shelf off Southeastern Hainan Island Since the Mid-Holocene  

作　　者：TIAN Xu JIANG Zuzhou GAO Wei LIU Zhaoqing LIU Xiling FAN Ying QIN Shengjie JING Chunlei XU Yue LIU Baohua XU Fangjian 

机构地区：[1]National Deep Sea Center,Qingdao 266237,China [2]School of Geosciences,China University of Petroleum,Qingdao 266580,China [3]Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China [4]China Three Gorges New Energy Co.,Ltd.,Beijing 100053,China [5]China National Offshore Oil Corporation,International Limited,Beijing 100027,China

出　　处：《Journal of Ocean University of China》2019年第5期1123-1129,共7页中国海洋大学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China (Nos. 41576058, 41106040);the China Postdoctoral Science Foundation (No. 2017M6 10403);the Taishan Scholar Project Funding (No. tspd2016 1007);Project of China Geological Survey (No. DD 20191010)

摘　　要：The concentrations of rare earth elements(REEs)in the bulk sediment of Core X2,which was collected from southeastern Hainan Island,were analyzed to investigate the relative contributions of various provenance regions since mid-Holocene.The results show that sediments in Core X2 were primarily derived from Hainan Island with lesser amounts from Taiwan and limited input from the Pearl River.Based on the application of quantitative inversion to model the REE data,the average contributions of river materials from southeastern Hainan Island and southwestern Taiwan to the study area were 68%and 32%,respectively.Furthermore,starting at 4.0 kyr BP,the transport of fluvial sediments from Taiwan to the study region increased due to enhanced hydrodynamics in South China Sea(SCS).These results indicate that the contributions of mountain river materials from Hainan Island and Taiwan to the continental shelf of northern SCS are non-negligible.Furthermore,these results demonstrate that mountain rivers can play an important role in the material cycle of continental margins and may feature a greater impact than large river systems in specific continental shelf areas.The concentrations of rare earth elements(REEs) in the bulk sediment of Core X2, which was collected from southeastern Hainan Island, were analyzed to investigate the relative contributions of various provenance regions since mid-Holocene. The results show that sediments in Core X2 were primarily derived from Hainan Island with lesser amounts from Taiwan and limited input from the Pearl River. Based on the application of quantitative inversion to model the REE data, the average contributions of river materials from southeastern Hainan Island and southwestern Taiwan to the study area were 68% and 32%, respectively. Furthermore, starting at 4.0 kyr BP, the transport of fluvial sediments from Taiwan to the study region increased due to enhanced hydrodynamics in South China Sea(SCS). These results indicate that the contributions of mountain river materials from Hainan Island and Taiwan to the continental shelf of northern SCS are non-negligible. Furthermore, these results demonstrate that mountain rivers can play an important role in the material cycle of continental margins and may feature a greater impact than large river systems in specific continental shelf areas.

关 键 词：CONTINENTAL SHELF South China Sea MID-HOLOCENE rare earth elements PROVENANCE 

分 类 号：P[天文地球]