Chepaizi Uplift in Junggar Basin is abundant in oil and gas resources and has unique tectonic evolution history.New understanding of the history was made possible recently with the latest exploration progress in the area.By combining balanced section technique with quantitative analyses of basic tectonic characteristics and activity parameters and physical structure modeling experiments

we discussed systematically in this paper the tectonic evolutionary characteristics and genesis from a spatial and temporal perspective.The result shows that the evolutionary history of the Uplift can be divided into four stages:the initial development stage (C

3

-P)

continuously uplifting stage (T-J)

stably burying stage (K-E) and local stretching tilting stage (N-Q)

since it was initiated during Late Carboniferous and then went through successively strong-weak-weaker compression and a weak extension.The tectonic evolution was mainly controlled by major changes in the tectonic stress field in the Uplift and its adjacent areas since the Late Carboniferous.During the C

3

-P period

an eastward "escaping tectonic compression" developed in the Uplift under the control of the E-W compression stress field

leading to the development of the nearly SN-trending Hongche fault belt in the east of the Uplift and large amounts of SN-trending secondary reverse faults in the major part of the Uplift.During the T-J period

the Uplift was in the NW-SE compression stress field on the top of the thrust wedge

and went through continuous uplifting

leading to the inheritance activities of some early reserve faults.During the K-E period

the Uplift experienced integral and slow subsidence and got stably buried.And during the N-Q period

the stress field turned to be NNE-trending extensional stress field

leading to local stretching and tilting.Large amounts of NWW-trending normal faults were developed while some early reverse faults experienced negative structural inversion.Controlled by the tectonic stress field

the regional tectonic line had turned from near SN direction to NE-SW trend and then to EW direction.