Show simple item record

dc.contributor.authorLiu, Chang  Concept link
dc.contributor.authorClift, Peter D.  Concept link
dc.contributor.authorMurray, Richard W.  Concept link
dc.contributor.authorBlusztajn, Jerzy S.  Concept link
dc.contributor.authorIreland, Thomas  Concept link
dc.contributor.authorWan, Shiming  Concept link
dc.contributor.authorDing, Weiwei  Concept link
dc.date.accessioned2017-04-14T16:04:48Z
dc.date.issued2017-01
dc.identifier.urihttps://hdl.handle.net/1912/8905
dc.description© The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Chemical Geology 451 (2017): 38-54, doi:10.1016/j.chemgeo.2017.01.008.en_US
dc.description.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 4–8 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.en_US
dc.description.sponsorshipFunding for this research was provided by U.S. Science Support Program and the Charles T. McCord chair in petroleum geology at Louisiana State University.en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.chemgeo.2017.01.008
dc.subjectGeochemistryen_US
dc.subjectClay mineralsen_US
dc.subjectIsotopesen_US
dc.subjectProvenanceen_US
dc.titleGeochemical evidence for initiation of the modern Mekong delta in the southwestern South China Sea after 8 Maen_US
dc.typePreprinten_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record