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学科主题: Geography, Physical; Geology; Geosciences, Multidisciplinary
题名: Flux and fate of Yangtze river sediment delivered to the East China Sea
作者: Liu, JP ; Xu, KH ; Li, AC ; Milliman, JD ; Velozzi, DM ; Xiao, SB ; Yang, ZS
通讯作者: jpliu@ncsu.edu
关键词: East China Sea ; Yangtze River ; clinoform ; delta ; mud wedge ; sea level
刊名: GEOMORPHOLOGY
发表日期: 2007
卷: 85, 期:40606, 页:208-224
收录类别: sci
部门归属: [Liu, J. P.; Velozzi, D. M.] N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA; [Xu, K. H.; Milliman, J. D.] Coll William & Mary, Sch Marine Sci, Gloucester Point, VA 23062 USA; [Li, A. C.] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China; [Xiao, S. B.] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; [Yang, Z. S.] Ocean Univ China, Coll Geomarine Sci, Qingdao 266003, Peoples R China
项目归属: 海洋地质
摘要: Numerous cores and dating show the Yangtze River has accumulated about 1.16 x 10(12) t sediment in its delta plain and proximal subaqueous delta during Holocene. High-resolution seismic profiling and coring in the southern East China Sea during 2003 and 2004 cruises has revealed an elongated (similar to 800 km) distal subaqueous mud wedge extending from the Yangtze River mouth southward off the Zhejiang and Fujian coasts into the Taiwan Strait. Overlying what appears to be a transgressive sand layer, this distal clinoform thins offshore, from similar to 40 in thickness between the 20 and 30 m water depth to < 1-2 in between 60 and 90 m water depth, corresponding to an across shelf distance of less than 100 km. Total volume of this distal mud wedge is about 4.5 x 10(11) m(3), equivalent to similar to 5.4 x 10(11) t of sediment. Most of the sediment in this mud wedge comes from the Yangtze River, with some input presumably coming from local smaller rivers. Thus, the total Yangtze-derived sediments accumulated in its deltaic system and East China Sea inner shelf have amounted to about 1.7 x 10(12) t. Preliminary analyses suggest this longshore and across-shelf transported clinoform mainly formed in the past 7000 yrs after postglacial sea level reached its mid-Holocene highstand, and after re-intensification of the Chinese longshore current system. Sedimentation accumulation apparently increased around 2000 yrs BP, reflecting the evolution of the Yangtze estuary and increased land erosion due to human activities, such as fanning and deforestation. The southward-flowing China Coastal Current, the northward-flowing Taiwan Warm Current, and the Kuroshio Current appear to have played critical roles in transporting and trapping most of Yangtze-derived materials in the inner shelf, and hence preventing the sediment escape into the deep ocean. (c) 2006 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000251894600009
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4460
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Liu, JP; Xu, KH; Li, AC; Milliman, JD; Velozzi, DM; Xiao, SB; Yang, ZS.Flux and fate of Yangtze river sediment delivered to the East China Sea,GEOMORPHOLOGY,2007,85(40606):208-224
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