Article Oceanology

Chinese Science Bulletin

, Volume 58, Issue 9, pp 1044-1052

Open Access This content is freely available online to anyone, anywhere at any time.

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

  • ZhaoKai XuAffiliated withKey Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences
  • , TieGang LiAffiliated withKey Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences Email author 
  • , XinKe YuAffiliated withKey Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences
  • , AnChun LiAffiliated withKey Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences
  • , Zheng TangAffiliated withKey Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Qingdao Institute of Marine Geology, Ministry of Land and Resources of China
  • , JinYong ChoiAffiliated withDepartment of Oceanography, Kunsan National University
  • , QingYun NanAffiliated withKey Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences

Abstract

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.

Keywords

major elements provenance eolian dust East Asian winter monsoon West Philippine Sea