古构造应力量值确定及其在构造地质建模中的应用

DETERMINATION OF MAGNITUDE OF PALAEO-TECTONIC STRESS AND APPLICATION TO TECTONIC GEOLOGICAL MODELING

在对地质构造及构造应力场数值模拟分析过程中,关键问题是在地质建模时如何确定模型边界条件的应力量值大小。以塔里木盆地塔中 I#断裂带构造数值模拟的建模过程为例,应用岩石 Kaiser 效应与方解石晶体晶格位错的测试结果,结合构造特征和构造演化的解析进行综合分析,确定了研究区域目的层位在不同构造运动时期古构造应力场应力量值的大小,并成功地建立了研究区域构造地质模型。

In the process of numerical modeling of tectonic and the palaeo-tectonic stress field, it is key problem to determine the stress magnitude as the boundary condition of model. The model construction process of Tazhong I# fracture zone in the center of Tarim basin, Xinjiang province, China, is taken as an example to show how to determine the palaeo-tectonic stresses of different beds with different tectonic movement ages. The tectonic geological model is successfully established by using Kaiser effect of the rock and testing result of dislocation in crystal lattice of conchite. The characteristics and resolution of the tectonic evolution are compensatively analyzed.