Sediment provenance and paleoenvironmental changes in the northwestern shelf mud area of the South China Sea since the mid-Holocene
作者： Fangjian Xu , Bangqi Hu , Yanguang Dou , Xiting Liu , Shiming Wan
DOI: 10.1016/J.CSR.2017.06.013
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摘要: Abstract The late Quaternary paleoceanography and paleoenvironment of the South China Sea (SCS) have been well reconstructed over last decade. In contrast, provenance terrigenous sediments that accumulated in northwestern continental shelf mud area remains enigmatic. This study investigated these paleoenvironmental changes archived Core X2 via analysis geochemical elements, grain size, accelerator mass spectrometry (AMS) 14 C ages. Based on upper crust (UCC)-normalized REE patterns fractionation parameters, southwestern western Taiwanese rivers Pearl River were identified as main sources fine-grained sediment deposited off Hainan Island. finding further confirms long-distance transport (> 1000 km) from to northern SCS slope. Obvious size Chemical Index Alteration (CIA) record occurred at approximately 4.0 cal kyr BP likely caused by increased Island inputs due sea level changes.
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