IOCAS-IR  > 海洋地质与环境重点实验室
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
Source PublicationCHEMICAL GEOLOGY
Volume451Pages:38-54
SubtypeReview
AbstractSedimentary 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.
KeywordGeochemistry Clay Minerals Isotopes Provenance
DOI10.1016/j.chemgeo.2017.01.008
Indexed BySCI
Language英语
WOS IDWOS:000394916900005
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136795
Collection海洋地质与环境重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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