Sedimentary Filling of the Pearl River Mouth Basin and Its Response to the Evolution of the Pearl River

详细信息   

• 责任者：Shao Lei (State Key Laboratory of Marine Geology ; Tongji University ; Shanghai 200092 ; China) ; Pang Xiong
• 刊名：Acta Sedimentologica Sinica
• 出版年：2008
• 卷期：26(2)
• 关键词：河口湾沉积作用 ; estuarine sedimentation ; 珠江口盆地 ; Zhujiangkou Basin
• 页码：p.179-185
• 图表：5 illus., 27 refs.
• 分类号：0200
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

摘要

The sediment geochemical composition between Oligocene and Miocene was different in the northern South China Sea, indicating a significant provenance change. This abrupt change coincided with a series of events including a seafloor spreading axis jump in the South China Sea and uplift of the western Yunnan Plateau and eastern Tibetan Plateau, leading to obvious changes in drainage areas of the Pearl River and the sediment geochemical composition. The variations in Ca/Si, CIA and Al₂O₃ reflect that the erosion areas of the Pearl River transformed from close-to-source neighboring areas in the Oligocene to the western Yunnan Plateau and eastern Tibetan Plateau since the Early Miocene, and the provenance rock types changed from silicate to carbonate, as well as the main sediment composition changed from sand-dominated to mud-dominated material.