176 Geophysics in Geothermal Exploration conductive, with electrical parameters varying within the first 300–350 meters of depth. Low-resistivity formations, such as clays and silts, surround zones of higher resistivity (up to a few tens of Ω·m), which may correspond to sandier layers and thus indicate potential aquifer formations. Below 300-350 meters, the geological formations exhibit high conductivity with resistivity values around 10 Ω·m, continuing uninterrupted down to the survey’s lower limit at 800–850 meters (see Figure 5.12). ––– Figure 5.12 Resistivity section. The ERT measurements were inverted using the ERTLab Studio software, following the removal of inaccurate measurements as outlined in the previous section. The three-dimensional inversion was conducted with the following configuration: 1. implementation of the complete topographic model, 2. mesh size 25 m×25 m×12.5 m in the x, y, and z directions of space, 3. depth of investigation equal to 900 meters from ground level, 4. initial resistivity inversion model set to of 15 Ω·m, corresponding to the median of apparent resistivities values,
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