Abstract: This paper presents a genetic model of normal fault in the interior of basin under regional compressive tectonic setting. The normal fault is often superimposed underlying paleo-uplift and basement faults. This study suggests that the basement uplift, warpage and basement fault block activity caused by basement compression and contraction under regional compressive setting are primary dynamic mechanism induced extensional deformation of overlying cap rocks, while the paleo-structural framework is the premise condition for the normal fault origin and development. It is indicated from the origin of normal fault that the control effect of basin basement on the structural deformation of cap rocks is the product of inharmonic deformation between basement and cap rocks during evolution of basin. This kind of normal fault has been found in northern uplift of Tarim basin and hinterland of Junggar basin.

Key words: normal fault, basement structure, basement uplift, cap rock, origin