Sequence stratigraphy of the Silurician strata in the northern and central Tarim Basin

Sequence stratigraphy and sedimentary facies distribution in the northern and central Tarim Basin are explored on the basis of cores,well logs,seismic and laboratory data with the aid of sequence stratigraphic method.The Silurician strata in the Tarim Basin may be grouped into three third-order sequences:SQ1 corresponding to the lower member of the Kalpintag Formation,SQ2 corresponding to the middle and upper members of the Kalpintag Formation and SQ3 corresponding to the Tata' airtag Formation,all of which consist of the transgressive and highstand systems tracts except the lowstand systems tract.Sedimentary facies within the sequence stratigraphic framework comprise the fan delta facies,barrier tidal-flat facies and neritic facies.