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学科主题: Geology
题名: Magnetic susceptibility variations and provenance of surface sediments in the South China Sea
作者: Liu, JG ; Chen, Z ; Chen, MH ; Yan, W ; Xiang, R ; Tang, XZ
通讯作者: jgliu@scsio.ac.cn
关键词: Magnetic susceptibility ; Surface sediments ; Fine-grained fraction ; Sediment sources ; South China Sea
刊名: SEDIMENTARY GEOLOGY
发表日期: 2010
卷: 230, 期:40545, 页:77-85
收录类别: sci
部门归属: [Liu, Jianguo; Chen, Zhong; Chen, Muhong; Yan, Wen; Xiang, Rong; Tang, Xianzan] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: 海洋地质
摘要: Magnetic susceptibility (MS) and grain sizes of surface sediments are measured to characterize sediment sources and their distribution in the South China Sea (SCS). Distribution characteristics of MS of bulk samples (MSB), fine-grained fraction (MSF) and coarse-grained fraction (MSC) are examined to explore the factors affecting MS values in sediment transport and deposition processes. Affected by dilution of quartz and carbonate abundance, MSC is not suitable for tracing sediment sources in the region. Instead. MSF provides a good parameter for tracking transport and deposition of complex and coarse-grained sediments such as those from Luzon Island volcanics and from the Pearl and Mekong Rivers, which often have high MSF values showing a decreasing trend with water depth on the continental shelf (water depth <200 m). To the west of Luzon Island, Kuroshio intrusion into the SCS is the predominant factor for sediment transport after high MSF volcanic materials from the Luzon Island are discharged into the sea. Sediments from the Pearl River are transported southwestward under the China coastal current and then deposited between the Pearl River mouth and Hainan Island. To the southwest of Taiwan Island in the northeastern SCS, where sediments are mainly derived from Taiwan Island and/or the Yangtze River, both the Kuroshio intrusion and the China coastal current are significant in determining sediment transport and deposition. In the south, most of high MSF sediments from the Mekong River are transported eastward under the influence of northeastward currents in summer after entering the sea and then deposited on the northern Sunda Shelf. (C) 2010 Elsevier B.V. All rights reserved.
原文出处: 查看原文
WOS记录号: WOS:000281991900007
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4308
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, JG; Chen, Z; Chen, MH; Yan, W; Xiang, R; Tang, XZ.Magnetic susceptibility variations and provenance of surface sediments in the South China Sea,SEDIMENTARY GEOLOGY,2010,230(40545):77-85
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