Sediment provenance and evolution of the East Asian winter monsoon since 700 ka recorded by major elements in the West Philippine Sea  

作　　者：XU ZhaoKai LI TieGang YU XinKe LI AnChun TANG Zheng CHOI JinYong NAN QingYun 

机构地区：[1]Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences [2]Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Qingdao Institute of Marine Geology,Ministry of Land and Resources of China [3]Department of Oceanography,Kunsan National University,Kunsan 573-701,Korea

出　　处：《Chinese Science Bulletin》2013年第9期1044-1052,共9页

基　　金：supported by the Public Science and Technology Research Funds Projects of Ocean,State Oceanic Administration of the People's Republic of China(201005003);the Open Fund of the KLMGE,IO,CAS,the National Natural Science Foundation of China(41106043 and 41230959);the National Basic Research Program of China(2007CB815903);the Innovative Program of the Chinese Academy of Sciences(KZCX2-YW-221)

摘　　要：To synthetically realize the character of major-element compositions as well as its significance for provenance and paleoenvironment recorded in core sediments of the West Philippine Sea over the last 700 ka,grain size and major elements of 221 bulk sediments,together with major-element compositions in the detrital phase of 16 typical samples,in core MD06-3047 collected from the Benham Rise were analyzed.Both discrimination plot and R-mode factor analysis indicate that vertical changes of major elements are mainly controlled by the sedimentation of nearby volcanic matter and the eolian dust input,whereas influences from marine biologic deposition and hydrothermal activity are minor.In particular,Al2O3 and K2O are representative of an eolian dust factor.The variation in the eolian dust factor score is characterized by the obviously glacial-interglacial periodicity and can be well compared with the paleotemperature record of the Antarctic ice core and the evolution of the East Asian winter monsoon(EAWM) recorded in the Chinese loess sequence,and then offers a new proxy for the evolution history of eolian dust input into the study area that is controlled by the EAWM intensity and aridity in the continental source regions of atmospheric dust.To synthetically realize the character of major-element compositions as well as its significance for provenance and paleoenvironment recorded in core sediments of the West Philippine Sea over the last 700 ka, grain size and major elements of 221 bulk sediments, together with major-element compositions in the detrital phase of 16 typical samples, in core MD06-3047 collected from the Benham Rise were analyzed. Both discrimination plot and R-mode factor analysis indicate that vertical changes of major elements are mainly controlled by the sedimentation of nearby volcanic matter and the eolian dust input, whereas influences from marine biologic deposition and hydrothermal activity are minor. In particular, A1203 and 1（20 are representative of an eolian dust factor. The variation in the eolian dust factor score is characterized by the obviously glacial-interglacial periodicity and can be well compared with the paleotemperature record of the Antarctic ice core and the evolution of the East Asian winter monsoon （EAWM） recorded in the Chinese loess sequence, and then offers a new proxy for the evolution history of eolian dust input into the study area that is controlled by the EAWM intensity and aridity in the continental source regions of atmospheric dust.

关 键 词：东亚冬季风 元素组成 西菲律宾海 泥沙来源 演变 R型因子分析 控制输入 古气候记录 

分 类 号：P736.21[天文地球—海洋地质]