Adrian, J. (Corresponding author)FZJ* ; Tezkan, B. ; Candansayar, M. E.

2015

Abstract: Ore deposits often appear as disseminated sulfidic materials. Exploring these deposits with theDirect Current Resistivity (DCR) method alone is challenging because the resistivity signaturescaused by disseminated material is often hard to detect. The Time-domain Induced Polarization(TDIP) method, on the other hand, is qualified to detect areas with disseminated sulfidic ores dueto large electrode polarization effects which result in large chargeability anomalies. By employingboth methods we gain information about both, the resistivity and the chargeability distribution ofthe subsurface.On the poster we present the current state of the development of a 2D smoothness constraintinversion algorithm for DCR and TDIP data. The implemented forward algorithm uses a FiniteElement approach with an unstructured mesh. The model parameters resistivity and chargeabilityare connected by either a simple conductivity perturbation approach or a complex conductivityapproach.As a case study, the 2D inversion results of DCR/TDIP and RMT data obtained during a survey ona sulfidic copper ore deposit in Turkey are presented. The presence of an ore deposit is indicatedby areas with low resistivity and significantly high chargeability in the inversion models.This work is part of the BMBF/TUEBITAK funded project ``Two-dimensional joint interpretation ofRadiomagnetotellurics (RMT), Direct Current Resistivity (DCR) and Induced Polarization (IP) data:an example from ore exploration''.