可控源变频大地电磁法在构造勘查中的应用

Application of Controllable Source Frequency Magnetotelluric Method in Structural Exploration

以新疆某地金矿勘查区为研究对象,根据可控源变频大地电磁法工作原理,采用EH-4连续电导率剖面仪对勘查区内化探异常的高值部位和异常叠加较好的部位布设的4条剖面进行探测,探测结果与收集的资料及前期的物探结果进行对比分析可知,AMT断面图浅层的视电阻率分布与激电测深电阻率分布基本吻合,与地质发现的已知断裂相吻合,说明采用可控源变频大地电磁法进行地质构造勘查是可行的。

Taking the exploration area of a gold mine in Xinjiang as a research object, and based on the working principle of controllable source variable frequency magnetotelluric method, 4 profiles were laid for detection with the EH-4 continuous conductivity profiler being used in the exploration area where geochemical anomaly high together with compounded effect. By comparing and analyzing the detection results with the collected data and the previous geophysical results, it can be seen that the Apparent Resistivity distribution in the shallow layer of the AMT section map and the IP bathymetric resistance distribution are basically consistent with each other, also consistent with known Faults found in geology. It shows that the controllable source variable frequency magnetotelluric method is feasible for geological structure exploration.