Abstract: The Selibuya fault zone separates the Maigaiti Slop and the Bach Uplift in the Tarim Basin,and its structural styles and tectonic evolution Fault zoneis related to some extent with the evolution of Bachu and Keping.Referring to the latest data of drilling,logging and 2D-seismic interpretation,we proposed that the previous defined Selibuya Fault zone be divided into two fault zones including Selibuya and Yasongdi.On sectional view,the former mainly features in basement-involved high-angle thrust extrusion and consists,together with the early Piqiang fault on Keping uplift,Piqiang-Selibuya fault zone,while the later is a superimposed thrust fault resulted from the superimposition of the SW-dipping shallow thrust fault of cap rock slipping type and the NE-dipping deep basement-involved thrust fault.On plane view,the Selibuya fault zone recognized in this paper can be divided into a north segment and a south segment.The whole Selibuya fault zone are characterized by high-angle deep thrust and positive flower structures.The south segment of this fault zone cuts upward into the Neogene and Quaternary,leading to the weak folding of the Neogene and Quaternary and the associated local decollement along the Paleogene cap rock.Combined with the evolution of Selibuya and the regional evolution of Bachu and Keping,it is believed that Selibuya fault zone went through mainly four main stages:the Late Caledonian,the Late Hercynian,the Early-Middle Hymalayan,and Late Hymalayan.

Key words: thrust fault, strike-slip fault, tectonic evolution, Selibuya fault zone, Tarim Basin