Clay Mineral Assemblage Features of Major Rivers along the South China Coast and Their Contributions to the Northern South China Sea

被引：5
作者：
Cao L. [1 ,2 ]
Liu J. [1 ,3 ]
He W. [1 ,2 ]
Hafijur Rahaman Khan M.D. [1 ,2 ]
机构：
[1] CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou
[2] University of Chinese Academy of Sciences, Beijing
[3] Laboratory for Marine Geology and Environment, Qingdao National Laboratory for Marine Science and Technology, Qingdao
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2018年 / 43卷
关键词：
Clay mineral; Northern South China Sea; Sediment sources; South China coastal rivers; Surface sediment;
D O I：
10.3799/dqkx.2018.189
中图分类号：
学科分类号：
摘要：
In order to explain distribution characteristics of clay mineral composition in sediments from coastal rivers, and their contribution to sediments in the northern South China Sea (NSCS), we collected sediment samples from six major rivers along the South China coast whose annual sediment discharge is greater than 500 thousand tons, together with surface sediment samples in the NSCS. The results show that (1) the total percentage of illite and kaolinite in sediments from the Han, Jiulong and Moyang rivers is more than 90%, (2) smectite percentage in coastal river sediments is very low except for the Rong river (18%), (3) sediments in these six rivers have low chlorite percentage, and only the Jian and Pearl rivers can reach 9%.The clay mineral assemblages in sediments from the above rivers are different from each other, which can be used to identify sediment sources in the NSCS. On the NSCS continental shelf, illite and chlorite mainly originate from the southwestern Taiwan, while kaolinite is primarily sourced from Jian, Moyang and Pearl Rivers. Smectite is largely derived from the Rong River, and area ranged from the Pearl River Delta to the Dapeng and Daya Bays. © 2018, Editorial Department of Earth Science. All right reserved.
引用
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页码：192 / 202
页数：10
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