Reconstruction of proto-type basin and tectono-paleogeography of Tarim block in early Paleozoic

Tarim Basin is a large, superimposed basin rich in petroleum resources, which has experienced many stages of complex tectonic-sedimentary evolution. As the basic geological study Basin, proto-type and tectono-paleogeographic evolution are great significance for understanding distribution reservoirs provide tectonic background theoretical guidance exploration. According to residual thickness map, as well other lithofacies seismic data, scopes determined by marginal facies method trend method, shortening amounts calculated balanced cross-section method. Based on these data previous works, four maps present-day geographic coordinates paleogeographic during early Paleozoic reconstructed, directly show changes sedimentary uplift-depression pattern caused transformation environment from extension compression. In Cambrian, was controlled extensional environment, with framework “carbonate platform west, deep-water east”. At end Ordovician, Kudi Ocean North Altyn were closed, Central South Kunlun terrane Altyn-Qilian collaged block, led east-west differentiation north-south differentiation, thus changing late Ordovician Silurian.