Features and controlling factors of differential structural deformation of Kalashayi Fault in Bachu Uplift, Tarim Basin

Based on latest seismic interpretation data,the features of differential deformation of the Kalashayi Fault in the central Bachu Uplift were analyzed by means of fault-related fold theory and balanced section technique.The Kalashayi Fault is an active fault of multiple stages in the Bachu Uplift.It has suffered several stages of deformation,such as the early Caledonian,the episode Ⅰ of the middle Caledonian,the late Hercynian and the early Himalayan.On the plane,two faults of different scales converge like scissors from SW to NE.In profile,the Kalashayi Fault is composed of ramp-flat blind thrust fault which slips in Cambrian and high-angle basement-involved thrust fault.Gypsum-salt rocks control the multi-level deformation features of the Kalashayi Fault.The difference of pre-structure in basement leads to the segmental deformation features.Regional stress field transition results in the poly-phase deformation features.