• 责任者：Yang Qunhui (State Key Laboratory of Marine Geology ; Tongji University ; Shanghai 200092 ; China) ; Li Mujun
• 刊名：Marine Geology & Quaternary Geology
• 出版年：2013
• 卷期：33(6)
• 关键词：海洋沉积物 ; marine sediments ; 南海 ; South China Sea
• 页码：p.1-7
• 图表：5 illus., 28 refs.
• 分类号：0200
• issnNo：ISSN0256-1492
• isbnNo：CN37-1117/P

     Grain-size analysis is carried out for the 95 surface sediment samples from the southwestern part of the South China Sea（3°56＇-11°53＇N,108°30＇-113°47＇E）, where clayey silt and silty clay dominate, with sand and silty sand only occurred in the most southwestern shallow part. There shows a trend of de- creasing grain-size, increasing sorting and decreasing skewness from the shallow water to deeper water. The Kriging method was employed to insert data of the grain-size parameters （mean grain-size, sorting co- efficient and skewness）, and then the trend analysis was carried out for the interpolated data using the GSTA program. It is revealed that the seabed topography plays a key role in the sediment transport. There is a topographic high in the area including the Guang-ya submarine plateau, the Nan-wei-tan plat- eau, and the Yong-shu-bei submarine plateau. To the north of the high, sediments from the western South China Sea continental shelf are transported into the Southwest Basin of South China Sea; to the south of the boundary, however, materials from the Sunda shelf and the Kalimantan Island are transported into the Nan-wei-xi and Bei-kang slope basin passing by the shelf break. The episodic sedimentary events, such as the turbidity current, also have significant impacts on the grain-size distribution pattern. The aggregation of the components 〈8 μm should not be ignored. Further researches are required for details.