Abstract: Evolution mechanism of transition zones of accordant overlap reverse fault and reversed overlap reverse fault cortrilling the formation of buried hill in Tazhong low uplift zone of Tarim basin was examined on the irasis of structural model of overlap reverse faults. It is suggested that the former is a slope and the latter a platform. Multi-period movements and overlaps of two major faulis resulted in the associated minor faults and braided fractures in transition zones, which are benefical to hydrocarbon migration and aC-cumulation. Moreover, oil and gas pool can form when the trap is met.

Key words: Tarim basin, Overlap reverse fault, Transition zone, Buried hill, Transform fault