Abstract: On the basis of zonations segmentation and layering of the Xiannushan fault zone,a spatialdeformational structure model has been established,and geometrical and kinematic characteristicsof the fault in two main deformational stages of its temporal evolution sequence are discussed. Interms of conjugate joints, striations on fault planes and microstructure in fault zone,the tectonicstress directions and differential stress in main Yanshanian tectonic deformation and main Hi-malayan phases tectonic deformation have been determined, respectively,and some important dynamic information has been obtained.

Key words: Xiannushan fault zone, Fault deformational structure, Differential stress, Changjiang Three Gorges

摘要： 根据仙女山断层分带性、分段性、分层性和断层变形结构特征,建立了其空间变形结构模式,进而讨论了仙女山断层带时间演化系列中两个主要变形阶段的几何学和运动学特征,并利用断层带的共轭节理、断面擦痕和显微构造标志分别确定燕山主期和喜马拉雅主期构造应力方向和差异应力大小,获得了若干重要的动力学资料。

关键词: 仙女山断层带, 断层变形结构, 差异应力, 长江三峡