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Geochemical evidence for initiation of the modern Mekong delta in the southwestern South China Sea after 8 Ma
Liu, Chang1; Clift, Peter D.1; Murray, Richard W.2; Blusztajn, Jerzy3; Ireland, Thomas2; Wan, Shiming4; Ding, Weiwei5
2017-02-20
发表期刊CHEMICAL GEOLOGY
卷号451页码:38-54
文章类型Review
摘要Sedimentary records in the southwestern South China Sea reflect the evolving erosion and drainage systems that have operated in Southeast Asia during the Neogene. Analyses of the chemistry and clay mineral composition of sediments from International Ocean Discovery Program (IODP) Site U1433 allow us to examine these processes over the last 17 Ma. Sediment older than 8 Ma was deposited relatively slowly. Sr and Nd isotopes indicate a variable provenance with sequences of less and more altered material accompanied by strong changes in the proportion of smectite. Sediment flux was probably from Indochina, as well as from a more primitive volcanic source, most likely the Palawan ophiolite and/or Luzon. Sediments younger than 8 Ma show a more stable Sr and Nd isotope character, indicating sources close to those seen in the modern Mekong River, although with some influx from smaller rivers draining the Indochina margin especially from 4 to 8 Ma. Our data are consistent with seismic estimates for an onset to the Mekong in its present location after 8 Ma, following an avulsion from the Gulf of Thailand. (C) 2017 Elsevier B.V. All rights reserved.
关键词Geochemistry Clay Minerals Isotopes Provenance
DOI10.1016/j.chemgeo.2017.01.008
收录类别SCI
语种英语
WOS记录号WOS:000394916900005
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136795
专题海洋地质与环境重点实验室
作者单位1.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA
2.Boston Univ, Dept Earth & Environment, Boston, MA 02215 USA
3.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02540 USA
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
5.State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China
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Liu, Chang,Clift, Peter D.,Murray, Richard W.,et al. Geochemical evidence for initiation of the modern Mekong delta in the southwestern South China Sea after 8 Ma[J]. CHEMICAL GEOLOGY,2017,451:38-54.
APA Liu, Chang.,Clift, Peter D..,Murray, Richard W..,Blusztajn, Jerzy.,Ireland, Thomas.,...&Ding, Weiwei.(2017).Geochemical evidence for initiation of the modern Mekong delta in the southwestern South China Sea after 8 Ma.CHEMICAL GEOLOGY,451,38-54.
MLA Liu, Chang,et al."Geochemical evidence for initiation of the modern Mekong delta in the southwestern South China Sea after 8 Ma".CHEMICAL GEOLOGY 451(2017):38-54.
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