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Late Pleistocene to Holocene formation process of Mekong River Delta, South Vietnam

Research Project

Project/Area Number 12440133
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionNiigata University

Principal Investigator

TATEISHI Masaaki  NIIGATA UNIVERSITY Faculty of Science, Professor, 理学部, 教授 (00126426)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Iwao  Faculty of Science, Professor, 理学部, 教授 (70018266)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 2000: ¥7,500,000 (Direct Cost: ¥7,500,000)
KeywordsMekong River Delta / Strand Plain / Coastal dune / 14C age / OSL dating / Facies Analysis / Delta progradation / Tide and wave mixed delta / 砂丘砂 / 鉱物組成 / 音響探査 / 不整合 / 完新統 / プログラデーション / 浜提列 / デルタフロント / 堆積相 / 海水準変動 / 環境変遷 / 相対的海水準変動 / 沿岸成層
Research Abstract

Detail analysis of core samples from 11 bore holes in the Lower Mekong River Delta show the sedimentation during the postglacial transgression and the Holocene evolution of the Mekong River Delta. The incised valley that formed during LGM (the Last Glacial Maximum) was mostly filled during the rise of sca-level after the LGM. The interfluvial zones are about -20 m in altitude and are covered unconformably by Holocene deltaic sediments. The deltaic sediments and detailed chlonostratigraphic analyses clearly show the delta progradation for the last 4 kyr in terms of the sediment facies, tide influence, progradation rate, and subaerial and subaqueous topography. As the delta has evolved, the delta environment has become more wave-influenced with the development of a beach-ridge field, longshore sediment dispersal, and a steep face of the delta front. Seismic profiles get by uni-boom along Mekong River and channels show clearly the unconformity within the Upper Pleistocene sediments. The a … More lluvial sediments lying on the unconformity is generally 20 to 40 m in thickness, partly upto 70m in incised valley.
Lower part of the Mekong River Delta is topographically characterized by development of several lines of active and relict beach sand ridges. The geomorphologic and sedimentologic features of these active and relict beach ridges were described primarily together with some ages by OSL dating from quartz grains of beach ridges. Samples for sedimento-logic and chlonologic analysis were collected from 8 lines of beach ridges and one boring core. Eight lines of relict and active sand ridges are observed to the south of Tra Vinh City. Although they are arranged generally parallel to the recent river and coast line, are distinctively developed in the eastern side of the island. Especially four lines inland converge to the south of the City, and elongated in the N-S direction parallel to the recent river. All beach ridges are diverged southward and westward to several narrow and low ridges. Some ages are gotten from relict beach sands by OSL dating method. Their ages are classified generally into two groups, that is, sands older than 4 kyr and ones younger than 1.2 kyr. Less

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Nguyen Van Lap: "Late Holocene depositional environments and coastal evolution of the Mekong River Delta, Southern Vietnam"Journal of Asian Earth Science. 18. 427-439 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh: "Sedimentary facies, diatom and foraminifer assemblages in a late Pleistocene-Holocene incised-valley sequence from the Mekong river Delta, Bentre Province, southern Vietnam : BT2 core"Journal of Asian Earth Sciences. 20. 83-94 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh: "Sediment facies and Late Holocene progradation of the Mekong River Delta in Bentre Province, southern Vietnam : an example of evolution from a tide-dominated to a tide-and wave-dominated delta"Sedimentary Geology. 152. 313-325 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh: "Holocene delta evolution and sediment discharge of the Mekong River, southern Vietnam"Quaternary Science Review. 21. 1807-1819 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Susumu Tanabe: "Delta evolution model inferred from the Holocene Mekong Delta, Southern Vietnam"Society of Economic Paleontologists and Mineralogists, Special Pub.. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nguyen Van Lap, Ta Thi Kim Oahn, and Masaaki Tateishi: "Late Holocene depositional environments and coastal evolution of the Mekong River Delta, Southern Vietnam"Journal of Asian Earth Science. Vol. 18, No.4. 427-439 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh, Nguyen Van Lap, Tateishi Masaaki, Kobayashi Iwao, and Saito Yoshiki: "Sedimentary facies, diatorn and foraminifer assemblages in a late Pleistocene-Holocene incised-valley sequence from the Mekong river Delta, Bentre Province, southern Vietnam : BT2 core"Journal of Asian Earth Sciences. Vol. 20. 83-94 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh, Nguyen Van Lap, Tateishi Masaaki, Kobayashi Iwao, Saito Yoshiki, and Nakamura Toshio: "Sediment facies and Late Holocene progradation of the Mekong River Delta in Bentre Province, southern Vietnam : an example of evolution from a tide-dominated to a tide- and wave-dominated delta"Sedimentary Geology. Vol.152. 313-315 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh, Nguyen Van Lap, Tateishi Masaaki, Kobayashi Iwao, Tanabe Susumu, and Saito Yoshiki: "Holocene delta evolution and sediment discharge of the Mekong River, southern Vietnam"Quaternary Science Review. Vol. 21. 1807-1819 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Susumu Tanabe, Thi Kim Oanh Ta, Van Lap Nguyen, Masaaki Tateishi, Iwao Kobayashi, and Yoshiki Saito: "Delta evolution model inferred from the Holocene Mekong Delta, Southern Vietnam"Society of Economic Paleontologists and Mineralogists, Spec. Pub.. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ta Thi Kim Oanh: "Sediment facies and Late Holocene progradation of the Mekong River Delta in Bentre Province, southern Vietnam: an example of evolution from a tide-dominated to a tide-and wave-dominated delta"Sedimentary Geology. 152. 313-325 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ta Thi Kim Oanh: "Holocene delta evolution and sediment discharge of the Mekong River, southern Vietnam"Quaternay Science Review. 21. 1807-1819 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Tanabe Susumu: "Delta evolution model inferred from the Holocene Mekong Delta, Southern Vietnam"Society of Economic Paleontologists and Mineralogists, Special Pub.. (In press).

    • Related Report
      2002 Annual Research Report
  • [Publications] Nguyen, V. L., Ta, T.K.O, Tateish, M.: "Late Holocene depositional environments and costal evolution of the Mekong River Delta, Southern Vietnam"Journal of Asian earth Science. 18. 427-439 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ta, T.K.O., Nguyen, V.L., Tateishi, M., Kobayashi, I., saito, Y.: "Sedimentary facies, diatom and foraminifer assemblages in a late Pleisto-Cene-Holocene incised-valley sequence from the Mekong River Delta"Journal of Asian Earth Sciences. 20. 83-94 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ta, T.K.O., Nguyen, V.L., Tateishi IM., Kobayashi, I., saito, Y.: "Late Holocene delta progradation and sediment discharge of the Mekong river, Southern Vietnam"Quaternary Science Reviews. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ta, T.K.O., Nguyen, V.L., Tateishi M., Kobayashi, I., et al.: "Sediment facies and late Holocene progradation of the Mekong River Delta In Bentre Province, Southern Vitna : in"Sedimentary Geology. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tanabe, S., Ta, T.K.O., Nguyen, V.L., Tateishi, M., et al.: "Delta evolution model inferred from the Mekong Delta, Southern Vietnam"Society of Economic Paleontologists and Mineralogists, Special Publication. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nguyen Van Lap: "Late Holocene depositional environments and coastal evolution of the Mekong River Delta, Southern Vietnam"Journal of Asian Earth Sciences. 18. 427-439 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ta Thi Kim Oanh: "Diatoms - indicator of sedimentary environmnets and sea-level changes in late Pleistocene - Holocene"Journal of Sciences of the Earth. 22・3. 226-233 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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