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学科主题: Multidisciplinary Sciences
题名: Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea
作者: Liu, ZF ; Colin, C ; Huang, W ; Chen, Z ; Trentesaux, A ; Chen, JF
通讯作者: lzhifei@mail.tongji.edu.cn
关键词: clay minerals ; surface sediments ; provenance ; East Asian monsoon ; Pearl River drainage basin
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2007
卷: 52, 期:8, 页:1101-1111
收录类别: sci
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
项目归属: 海洋地质
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.
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WOS记录号: WOS:000247163200013
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4486
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Liu, ZF; Colin, C; Huang, W; Chen, Z; Trentesaux, A; Chen, JF.Clay minerals in surface sediments of the Pearl River drainage basin and their contribution to the South China Sea,CHINESE SCIENCE BULLETIN,2007,52(8):1101-1111
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