Research Article

Three-Dimensional Induced Polarization Parallel Inversion Using Nonlinear Conjugate Gradients Method

Figure 9

Observation system for combined borehole-surface and borehole-borehole method; (a) shows 3D graph of acquisition mode; (b) shows synthetic model and electrodes in the direction main profile; (c) shows surface electrodes and projection of anomalous body on the ground (black crosses = current electrodes; red circles = receivers).
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