【摘要】 本文利用边界元与有限元耦合方法和实测的纵向视电阻率曲线模拟了内蒙寒汗乌力吉地区的地壳电性结构。根据钻孔资料和综合地球物理勘探成果,构制了本模型的上部电性结构。在模拟过程中,它保持不变,仅通过反复调试模型的中下部结构,直至构制模型的计算曲线与实测的视电阻率曲线拟合为止。模拟结果表明:本区内在深10公里处有在一个电阻率值为4至10欧姆·米、厚2至4公里的低阻层。中部厚,向两侧变薄,它和浅部盆地构造在横向分布上有一定的对应关系。更多还原

【Abstract】 The crust’s electric structure in the Sherlharwulijie region of Inner Mongolia is simulated using the coupling method of Boundary Element and Finite Element. The upper crusta] structure is constructed with the data obtained by the drilling as well as the synthetic interpretation of the available geophysical prospecting. In the process of modeling, the upper electric structure is then assumed to be known, but that of the lower one is to be adjusted by trial and error method to matcr the measured curves. Finally, the profile reflecting the electric structure in the region under consideration is obtained. The simulating result shows that there is a lower resistivity layer which is buried in the depth of 10km, and the thickness is related to the structure of the upper sedimentary basin beneath which the zone is thickened up to 4km and thinned laterally to 2km.更多还原