关键词: 构造应力场, 数值模拟, 吐哈盆地

Abstract: On the basis of data of geology, seismic profiling, gravity and field observations, we have analyszed the mechanical features and motion ways of the blocks which consist of the Turpan-Hami basin in Xinjiang. From this the development model of the basin is proposed. Considering the geological model as well as the factor of geological time, calculational models including regional plane model, whole-basin model, NS strike profile model and the Taibei depression 3D model are established. The finite element method is used to simulate the paleotectonic stress and deformation fields. The results show that the Turpan-Hami basin has been subjected a compressive force since the Jurassic period. The modeling results also indicate the asymmetric form of the basin as well as the variations with depth of the orientation of the principal stress.

Key words: Tectonic stress field, Numerical simulation, Turpan-Hami Basin