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.