Mixed sedimentation in the Carboniferous Xiaohaizi Formation in the central uplift of the Tarim Basin

The stratigraphic and sedimentary facies of the Carboniferous Xiaohaizi Formation in the central uplift of the Tarim Basin were analyzed in details based on previous research and combined with outcrops, ancient tectonic sedimentary background, paleontological, drilling and seismic data. Mixed clastic and carbonate deposits widely distributed in the study area. The change of lithology assemblage in the east of the study area corresponded to the transition environment with intense clastic and carbonate mixing. We recognized three kinds of mixed sedimentary facies such as mixed tidal flat facies, open platform facies and restricted platform facies. A development model of the mixed sedimentation in the Carboniferous Xiaohaizi Formation in the central uplift of the Tarim Basin was summarized.