The TEM survey line is arranged in the middle of the survey line where the survey hole is located. All the survey holes have CT imaging of adjacent holes, so the TEM survey section can be compared not only with the survey hole data, but also with the parallel CT section. The distance between TEM measuring points is 2m, and the inversion depth is 40m.

Figure 33 Field Map
Fig. 34 Comparison of CT section (upper) and TEM section (lower) of parallel survey lines

The TEM depth profile shows that there are many areas of low resistivity anomaly with a buried depth of about 20m. It is speculated that the area of low resistivity anomaly has karst development, broken rock strata and may contain water. Compared with the measured CT profile, the position and burial depth of the exploration anomaly area correspond to each other, and the exploration results are highly consistent. CT line and TEM line are parallel to each other, and the distance between them is within 10m.