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Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea
Liu, ZF; Colin, C; Huang, W; Chen, Z; Trentesaux, A; Chen, JF; lzhifei@mail.tongji.edu.cn
2007
发表期刊CHINESE SCIENCE BULLETIN
ISSN1001-6538
卷号52期号:8页码:1101-1111
摘要Clay minerals have played a significant role in the study of the East Asian monsoon evolution in the South China Sea by being able to track oceanic current variations and to reveal contemporaneous paleoclimatic changes prevailing in continental source areas. As one of the most important rivers inputting terrigenous matters to the northern South China Sea, the Pearl River was not previously paid attention to from the viewpoint of clay mineralogy. This paper presents a detailed study on clay minerals in surface sediments collected from the Pearl River drainage basin (including all three main channels, various branches, and the Lingdingyang in the estuary) by using the X-ray diffraction (XRD) method. The results indicate that the clay mineral assemblage consists dominantly of kaolinite (35%-65%), lesser abundance of chlorite (20%-35%) and illite (12%-42%), and very scare smectite occurrences (generally <5%). -1 heir respective distribution does not present any obvious difference throughout the Pearl River drainage basin. However, downstream the Pearl River to the northern South China Sea, the clay mineral assemblage varies significantly: kaolinite decreases gradually, smectite and illite increase gradually. Additionally, illite chemistry index steps down and illite crystallinity steps up. These variations indicate the contribution of major kaolinite, lesser illite and chlorite, and very scarce smectite to the northern South China Sea from the Pearl River drainage basin. The maximum contribution of clay minerals from the Pearl River is 72% to the northern margin and only 15% to the northern slope of the South China Sea. In both glacials and interglacials, kaolinite indicates that the ability of mechanical erosion occurred in the Pearl River drainage basin.
部门归属Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; Univ Paris 11, CNRS, Labs IDES, UMR 8148, F-91405 Orsay, France; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Univ Lille 1, CNRS, UMR 8110, PBDS,FR 1818, F-59655 Villeneuve Dascq, France; State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Peoples R China
关键词Clay Minerals Surface Sediments Provenance East Asian Monsoon Pearl River Drainage Basin
学科领域Multidisciplinary Sciences
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000247163200013
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4486
专题中科院边缘海地质重点实验室
通讯作者lzhifei@mail.tongji.edu.cn
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GB/T 7714
Liu, ZF,Colin, C,Huang, W,et al. Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea[J]. CHINESE SCIENCE BULLETIN,2007,52(8):1101-1111.
APA Liu, ZF.,Colin, C.,Huang, W.,Chen, Z.,Trentesaux, A.,...&lzhifei@mail.tongji.edu.cn.(2007).Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea.CHINESE SCIENCE BULLETIN,52(8),1101-1111.
MLA Liu, ZF,et al."Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea".CHINESE SCIENCE BULLETIN 52.8(2007):1101-1111.
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