Development and Its Tectonic Activity’s Origin of Turbidity Current Sediment Wave in Manila Trench, the South China Sea

详细信息   

• 责任者：Wang Hairong (School of Energy ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Yingmin
• 刊名：Acta Sedimentologica Sinica
• 出版年：2008
• 卷期：26(1)
• 关键词：浊流 ; turbidity currents ; 南海 ; South China Sea
• 页码：p.39-45
• 图表：6 illus., 32 refs.
• 分类号：0200
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

摘要

A spectacular sediment wave field which situated at water depth of 2 600~4 100 m cover area of approximately 35 000 km² in Manila Trench, the northeast South China Sea. The sediment field can be judged the turbidity current’s origin based on its related characters, regional distribution and material composition, which initiated at 1.2 Ma and build the sediment body exhibiting the wave seismic reflection and thus is different from the underlying parallel seismic reflection distinctly. In 1.2 Ma the focus of collision arrived at the present south part of Taiwan Island and so significantly enhanced the physical denudation rate of related region, thus the rapidly increased the supply of material to deepwater environment, and result in quite enhancement of the strength and the frequency of turbidity current.