Adrian, J.FZJ* ; Tezkan, B.

2016

Abstract: Ore deposits often appear as disseminated sulfidic materials. Exploring these deposits with the Direct Current Resistivity (DCR) method alone is often challenging because the resistivity signatures caused by disseminated material is hard to detect. On the other hand, the Time-domain Induced Polarization (TDIP) method is qualified to detect areas with disseminated sulfidic ores due to large electrode polarization effects which result in large chargeability anomalies. By employing both methods we gain information about both, the resistivity and the chargeability distribution of the subsurface.Here, we present the newly developed 2D smoothness constraint inversion algorithm for DCR and TDIP data. The implemented forward algorithm uses a Finite Element approach with an unstructured mesh. The model parameters resistivity and chargeability are connected by a conductivity perturbation approach. It is shown, that the resolution of chargeability anomalies is not strongly effected by the corresponding resistivity anomaly.As a case study, the 2D inversion results of DCR/TDIP and RMT data obtained during a survey on a sulfidic copper ore deposit in Turkey are presented.