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Study on the Sequence Stratigraphy and Depositional Systems of the Kapushaliang Group of Cretaceous in the Central Tabei Uplift
Author(s): 
Pages: 1113-1122
Year: Issue:  6
Journal: Acta Sedimentologica Sinica

Keyword:  Tabei UpliftCretaceoussequence stratigraphy frameworksedimentary systemsfavorable zones;
Abstract: Based on the theory of sequence stratigraphy and analysis of seismic data,logging,cores and outcrop information,the sequence stratigraphy framework of Cretaceous in the central Tabei Uplift is established. The Kapushaliang Group as a second-order sequence,is divided into five third-order sequences. Each third-order sequence consists of lowstand system tract,transgression system tract and highstand system tract. Braided river,meandering delta and laucstrine facies are recognized within the sequence. The distribution of sedimentary systems are analysed with the tectonic evolution of the foreland basin. Halahatang area is located in back-bulge zone of the Kuqa depression foreland basin. The structural evolution of foreland basin of Kuqa depression in Cretaceous has its phases,which controls the characteristics of depositional palaeogeography development in the depression in different stages. The sand bodied of lowstand system tract and highstand system tract of SQ1,SQ2 and SQ5 are favorable explore targets and the meandering delta front in the middle of the study area are also favorable zones.
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