Three-Dimensional Electrical and Deep Structure Features of Akebasitao Area in Western Junggar by AMT Data

To investigate three-dimensional electrical features of Akebasitao rock mass and the structure of Darbut fault, we used audio magnetotelluric sounding for geological mapping exploration of three-dimensional nature in the region and display the results of the two-dimensional Occam inversion in three dimensions. The results indicate that there are two magma channels in southeast and northwest parts in two sides of Darbut fault. The southeast intrusive rock mass is large in size and only partly connected to Akebasitao rock mass since it was cut by Darbut fault. The magma channel in northwest is directly connected to rock mass as a reverse cone pyramid which is larger in shadow part and getting smaller in the deep, which resulted from the magma intrusion into the middle of the survey area. The rock mass can be 7-8 km deep in the middle part and there are low resistance materials below the rock mass. It is concluded that Darbut fault in this area strikes northeast-southwest to northwest, with big inclination angle, as steep as 5 to 10 km and the lower part of fault is connected to the low resistance material below the rock mass.