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U-PB Zircon Ages and Provenance of Upper Cenozoic Sediments from the Da Lat Zone, SE Vietnam: Implications For an Intra-Miocene Unconformity and Paleo-Drainage of the Proto–Mekong River

2018; Society for Sedimentary Geology; Volume: 88; Issue: 4 Linguagem: Inglês

10.2110/jsr.2018.26

1938-3681

Juliane Hennig-Breitfeld, H. Tim Breitfeld, Amy Gough, Robert Hall, Trinh Van Long, Vinh Mai Kim, Sang Dinh Quang,

earthquake and tectonic studies

Research Article| April 17, 2018 U-PB Zircon Ages and Provenance of Upper Cenozoic Sediments from the Da Lat Zone, SE Vietnam: Implications For an Intra-Miocene Unconformity and Paleo-Drainage of the Proto–Mekong River Juliane Hennig; Juliane Hennig 1Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EX, U.K. Search for other works by this author on: GSW Google Scholar H. Tim Breitfeld; H. Tim Breitfeld 1Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EX, U.K. Search for other works by this author on: GSW Google Scholar Amy Gough; Amy Gough 1Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EX, U.K. Search for other works by this author on: GSW Google Scholar Robert Hall; Robert Hall 1Department of Earth Sciences, Royal Holloway University of London, Egham TW20 0EX, U.K. Search for other works by this author on: GSW Google Scholar Trinh Van Long; Trinh Van Long 2South Vietnam Geological Mapping Division, 200 Ly Chinh Thang Street, Ward 9, District 3, Ho Chi Minh City, Vietnam Search for other works by this author on: GSW Google Scholar Vinh Mai Kim; Vinh Mai Kim 2South Vietnam Geological Mapping Division, 200 Ly Chinh Thang Street, Ward 9, District 3, Ho Chi Minh City, Vietnam Search for other works by this author on: GSW Google Scholar Sang Dinh Quang Sang Dinh Quang 3PetroVietnam University, 7th floor, PVU Building, Long Toan Ward, Ba Ria City, Ba Ria-Vung Tau Province, Vietnam Search for other works by this author on: GSW Google Scholar Journal of Sedimentary Research (2018) 88 (4): 495–515. https://doi.org/10.2110/jsr.2018.26 Article history first online: 24 Apr 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Juliane Hennig, H. Tim Breitfeld, Amy Gough, Robert Hall, Trinh Van Long, Vinh Mai Kim, Sang Dinh Quang; U-PB Zircon Ages and Provenance of Upper Cenozoic Sediments from the Da Lat Zone, SE Vietnam: Implications For an Intra-Miocene Unconformity and Paleo-Drainage of the Proto–Mekong River. Journal of Sedimentary Research 2018;; 88 (4): 495–515. doi: https://doi.org/10.2110/jsr.2018.26 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyJournal of Sedimentary Research Search Advanced Search Abstract The present-day Mekong River is the twelfth longest river in the world. It drains the Tibetan Plateau and forms a large delta in south Vietnam. Remnants of upper Cenozoic fluvial to marginal marine proto-Mekong sediments are exposed in the Da Lat Zone in southeast Vietnam and are likely the on-land equivalents of large sediment packages offshore in the Cuu Long and Nam Con Son Basins. Provenance studies are used here to identify sources that allow reconstruction of sediment pathways. The Oligo-Miocene Di Linh Formation has a main Cretaceous zircon age population and subordinate Paleoproterozoic (c. 1.8-1.9 Ga) zircons, sourced mainly from Cretaceous plutons. In contrast, the early Pliocene to Pleistocene Song Luy Formation includes additional Permian–Triassic and Ordovician–Silurian age populations which are interpreted to be sourced from basement rocks in central and northern Vietnam. There is a significant change in provenance between these formations, interpreted as an intra-Miocene unconformity. The late Pliocene to Pleistocene Ba Mieu Formation shows a much greater abundance of Precambrian zircons, including a small age peak at c. 2.5 Ga, interpreted to be derived from old basement exposed in South China. Abundant Cretaceous zircons and a lack of Jurassic zircons in all three formations contrast with the present-day Mekong River delta. Therefore, the data are proposed to show a development of the proto–Mekong River progressing northward from the Da Lat Zone, to the Kontum Massif and northern Vietnam, to capturing of reversed rivers and/or reworking of sediments from old cratons in South China. You do not currently have access to this article.