Sedimentary processes, on the Mekong subaqueous delta: Clay mineral and geochemical analysis

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	Sedimentary processes, on the Mekong subaqueous delta: Clay mineral and geochemical analysis
	Xue, Zuo 1; Liu, J. Paul 1; DeMaster, Dave 1; Leithold, Elana L.1; Wan, Shiming 2; Ge, Qian 3; Van Lap Nguyen 4; Thi Kim Oanh Ta 4
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2014-01-05
卷号	79 页码:520-528
关键词	South China Sea Mekong River Delta Clay mineralogy Organic carbon Depositional environment
通讯作者	Xue, Z (reprint author), N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Box 8208, Raleigh, NC 27695 USA.
英文摘要	Sedimentary processes on the inner Mekong Shelf were investigated by examining the characteristics of sediments sampled in gravity cores at 15 locations, including grain size, clay mineralogy, sediment accumulation rates, and the elemental and stable carbon isotopic composition of organic matter (atomic C/N ratios and delta C-13). Deltaic deposits exhibit contrasting characteristics along different sides of the delta plain (South China Sea, SCS hereafter, to the east and Gulf of Thailand, GOT hereafter, to the west) as well as on and off the subaqueous deltaic system. On one hand, cores recovered from the subaqueous delta in the SCS/GOT are consisted of poorly/well sorted sediments with similar/different clay mineral assemblage with/from Mekong sediments. Excess Pb-210 profiles, supported by C-14 chronologies, indicate either "non-steady" (SCS side) or "rapid accumulation" (GOT side) processes on the subaqueous delta. The delta C-13 and C/N ratio indicate a mixture of terrestrial and marine-sourced organic matter in the deltaic sediment. On the other hand, cores recovered from areas with no deltaic deposits or seaward of the subaqueous delta show excess Pb-210 profiles indicating "steady-state" accumulation with a greater proportion of marine-sourced organic matter. Core analysis's relevance with local depositional environment and previous acoustic profiling are discussed. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	Geology
收录类别	SCI
语种	英语
WOS记录号	WOS:000330604900043
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/23845]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 3.State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China 4.VAST, HCMC Inst Resources Geog, Thanh Pho Ho Chi Minh, Vietnam
推荐引用方式 GB/T 7714	Xue, Zuo,Liu, J. Paul,DeMaster, Dave,et al. Sedimentary processes, on the Mekong subaqueous delta: Clay mineral and geochemical analysis[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,79:520-528.
APA	Xue, Zuo.,Liu, J. Paul.,DeMaster, Dave.,Leithold, Elana L..,Wan, Shiming.,...&Thi Kim Oanh Ta.(2014).Sedimentary processes, on the Mekong subaqueous delta: Clay mineral and geochemical analysis.JOURNAL OF ASIAN EARTH SCIENCES,79,520-528.
MLA	Xue, Zuo,et al."Sedimentary processes, on the Mekong subaqueous delta: Clay mineral and geochemical analysis".JOURNAL OF ASIAN EARTH SCIENCES 79(2014):520-528.