AMT方法在二连盆地腾格尔坳陷南缘中的应用研究

Research and Application of AMT Method in the South of Tengger Depression Erlian basin

对二连盆地腾格尔坳陷南缘2条典型AMT电磁测量剖面进行了二维视电阻率反演,结合已知地质资料,查明了腾格尔坳陷南缘地电结构信息并推断解译了中生界沉积地层的埋深、产状和空间分布等。同时根据剖面视电阻率变化特点,推断解译了2条切穿基底的深大断裂,其中F_1断裂为贯穿全盆的楚鲁图断裂。通过对比反演结果和钻探资料,揭示了基底侏罗系火山岩地层顶面埋深,厘定了扎克斯台凹陷与善旦凸起的边界,为后续铀矿勘查工作的开展提供了依据。

2D resistivity inversion carries out at 2 typical profiles where located in the southern part of Tengger de- pression and combine with geological and borehole logging data, reveals the geoelectrical structures and distribu- tion characteristics of Mesozoic sedimentary stratum. According to the characteristics of resistivity changes, 2 deep faults which cut through the basement are interpreted and it reveals that F1 fault which throughout the whole basin is chu lu tu fracture zones. Based on the distribution of faults and top surface depth of Jurassic volcanic basement rocks which reflected by drilling mined, which provides the basis data, the boundary between Shandan convex and Zakesitai depression is deter- for the following uranium exploration.