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    DONG Li-quan, WANG Xin. Sequence stratigraphy of the second member of the Upper Triassic Xujiahe Formation in the middle part of western Sichuan depression[J]. Sedimentary Geology and Tethyan Geology, 2004, 24(4): 66-75.
    Citation: DONG Li-quan, WANG Xin. Sequence stratigraphy of the second member of the Upper Triassic Xujiahe Formation in the middle part of western Sichuan depression[J]. Sedimentary Geology and Tethyan Geology, 2004, 24(4): 66-75.
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    Sequence stratigraphy of the second member of the Upper Triassic Xujiahe Formation in the middle part of western Sichuan depression

    • 1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;

    • 2. Southwestern Branch, SINOPEC, Chengdu 610081, Sichuan, China

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    • Received Date: June 03, 2004
    • Published Date: December 29, 2004
      Graphical Abstract
      • Abstract
    • The second member of the Upper Triassic Xujiahe Formation is the regional gas horizons in the middle part of western Sichuan depression. The stratigraphic horizons have long been divided according to a lithostratigraphic boundary. The diachronism of this boundary may give rise to the differences in the examination of tectonic evolution. The findings based on sequence stratigraphy in this study have disclosed that the second member of the Upper Triassic Xujiahe Formation should be the delta deposits consisting of a complete medium-term cyclic succession, including the delta plain-delta front symmetrical cyclic sequence and deepening-upward delta plain asymmetrical cyclic sequence. The top boundary of the second member of the Upper Triassic Xujiahe Formation is interpreted as a third-order conformity.
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