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LI Guo-biao, WAN Xiao-qiao, DING Lin, LIU Wen-can, GAO Lian-feng. The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy[J]. Acta Sedimentologica Sinica, 2004, 22(3): 455-464.
Citation: LI Guo-biao, WAN Xiao-qiao, DING Lin, LIU Wen-can, GAO Lian-feng. The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy[J]. Acta Sedimentologica Sinica, 2004, 22(3): 455-464.

The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy

  • Received Date: 2003-07-02
  • Rev Recd Date: 2003-09-03
  • Publish Date: 2004-09-10
  • Triassic to Paleogene,Tethyan Himalaya went through the forming, exaggerating, attenuating, closing and finally transforming into foreland basin of the oceanic basin. During the passive continental margin stage (T-K),a set of sedimentary sequence of clastic shelf to carbonate platform was developed in the northern Indian continent margin. At the earliest Paleogene,Tibet-Tethys was closed down,causing the forming of the southern Tibet peripheral foreland basin system. In late Eocene,the returning of the southern Tibet foreland basin caused the sea-water to retreat gradually from Tibet area from east to west. The Paleocene supersequence of the southern Tibet was formed under the background of the India/Asia collision,the sedimentary environment of which was a foreland basin with strong tectonic activity. Sedimentary facies is the substance exhibition of depositional environments. In this study, 13 biofacies and 14 sedimentary facies were recognized from the Paleogene sediments of the southern Tibet. The supersequence with 200-2000m thickness and 30Ma age is composed of nine large-scale third-class sequences which could be regionally correlated on the outcrops. Small-scale third-class parasequence sets, which resulted from the global sea-level change and unbalancedly flexual subsidence of basin basement caused by collision and only can be locally correlated, formed larger-scale sequences. Every large-scale third class sequence is asymmetrical and characterized by LST,TST and HST with special lithologic associations and palaeontological assemblages. The evolution of the southern Tibet foreland basin is accordant with the usual evolutional model of foreland basin and its sedimentary sequence shows that it had a multi-cycle sediment-tectonic evolutional history.
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  • Received:  2003-07-02
  • Revised:  2003-09-03
  • Published:  2004-09-10

The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy

Abstract: Triassic to Paleogene,Tethyan Himalaya went through the forming, exaggerating, attenuating, closing and finally transforming into foreland basin of the oceanic basin. During the passive continental margin stage (T-K),a set of sedimentary sequence of clastic shelf to carbonate platform was developed in the northern Indian continent margin. At the earliest Paleogene,Tibet-Tethys was closed down,causing the forming of the southern Tibet peripheral foreland basin system. In late Eocene,the returning of the southern Tibet foreland basin caused the sea-water to retreat gradually from Tibet area from east to west. The Paleocene supersequence of the southern Tibet was formed under the background of the India/Asia collision,the sedimentary environment of which was a foreland basin with strong tectonic activity. Sedimentary facies is the substance exhibition of depositional environments. In this study, 13 biofacies and 14 sedimentary facies were recognized from the Paleogene sediments of the southern Tibet. The supersequence with 200-2000m thickness and 30Ma age is composed of nine large-scale third-class sequences which could be regionally correlated on the outcrops. Small-scale third-class parasequence sets, which resulted from the global sea-level change and unbalancedly flexual subsidence of basin basement caused by collision and only can be locally correlated, formed larger-scale sequences. Every large-scale third class sequence is asymmetrical and characterized by LST,TST and HST with special lithologic associations and palaeontological assemblages. The evolution of the southern Tibet foreland basin is accordant with the usual evolutional model of foreland basin and its sedimentary sequence shows that it had a multi-cycle sediment-tectonic evolutional history.

LI Guo-biao, WAN Xiao-qiao, DING Lin, LIU Wen-can, GAO Lian-feng. The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy[J]. Acta Sedimentologica Sinica, 2004, 22(3): 455-464.
Citation: LI Guo-biao, WAN Xiao-qiao, DING Lin, LIU Wen-can, GAO Lian-feng. The Paleogene Foreland Basin and Sedimentary Responses in the Southern Tibet: Analysis on Sequence Stratigraphy[J]. Acta Sedimentologica Sinica, 2004, 22(3): 455-464.
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