吐鲁番-哈密盆地中新生代构造变形的数值模拟分析

根据地质、地震剖面、重力等资料及野外实地考察结果，分析了新疆吐哈盆地内各块体的力学性质和运动方式，在此基础上提出了吐哈盆地的发育模式。根据地质模型，并充分考虑了地质时间因素，建立了包括大区域平面模型、南北向剖面模型和台北凹陷三维模型等计算模型，用有限元数值计算方法模拟了古构造应力场和构造变形场。结果表明：吐哈盆地自侏罗纪以来一直受到近南北向的挤压，但盆地各段边界上的作用方向略有变化。模拟结果还显示出盆地的不对称形态以及主应力方向随深度的变化

NUMERICAL MODELING AND ANALYSES OF TECTONIC DEFOMATION DURING MESOZOIC AND CENOZOIC IN THE TURPAN HAMI BASIN OF XINJIANG

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.