Spectral two-dimensional inversion of frequency-domain induced polarization data from a mining slag heap

We apply the method to a field data set from a slag dump containing melting residuals from different minerals. The resulting models exhibit distinct zones of decreased conductivity and increased polarization that are not fully coincident. Furthermore, we observe a significant change in the spectral content. Taking into account recent laboratory investigations, the obtained chargeabilities hint to the occurrence of sufficient mineral concentration. In comparison with direct current resistivity, there is a clear benefit from using SIP field data in general and spectral analysis in particular.