Fig. 1. Tectonic structure of central basin (Rangin, 2017) and DC resistivity measurement line (white dotted line) and MT measurement station(yellow circle). Red dotted box shows the study area.
Fig. 2. Pictures of study area. (a) view of MT survey site (b) picture of DC resistivity site (c) view of non-polarizable electrode installed (d) view of sucker rod pump installed.
Fig. 3. Electrode elevation measured by GPS.
Fig. 4. Inversion result of DC resistivity survey.
Fig. 5. Inversion result of DC resistivity survey considering topographic effect.
Fig. 6. Result of data editing and coherency analysis using P8 data. (a) Data editing and (b) coherency.
Fig. 7. Polar diagrams of principal direction estimated with MT and AMT data at P7 according to frequency intervals. (a) 0.1 ~ 1 Hz, (b)1 ~ 10 Hz, (c) 10 ~ 100 Hz and (d) 100 ~ 1000 Hz.
Fig. 8. Results of MT survey. (a) Apparent resistivity of P6, (b) phase of P6, (c) apparent resistivity of P11 and (d) phase of P11.
Fig. 9. Two-dimensional inversion result of MT survey. White dotted line indicates a fault.
Fig. 10. Comparison of 2D inversion results of DC resistivity and MT survey.
Table 1. Location and length of electrode field of MT stations.
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