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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。
In this paper, the crustal electrical structure in the Hanlizi area in the Inner Mongolia Hanban was simulated using the coupled boundary element and finite element method and the measured vertical apparent resistivity curve. According to the drilling data and comprehensive geophysical exploration results, the upper electrical structure of this model is constructed. It remains unchanged during the simulation, only by iteratively tuning the mid-lower structure of the model until the calculated curve of the configuration model fits the measured apparent resistivity curve. The simulation results show that there is a low resistivity layer with a resistivity of 4 to 10 ohm · m and a thickness of 2 to 4 km at a depth of 10 km in this area. The middle is thick and thin on both sides. It has some correspondence with the shallow basin structure in the horizontal distribution.