Proposing the optimum locations for drilling in Saveh North-Narbaghi ‎porphyry copper deposit on the basis of geophysical data modeling

In the present research, modeling of magnetic, resistivity (Rs) and induced polarization (IP) data ‎of Saveh North-Narbaghi deposit has been carried out. Also 23 deep boreholes with a total ‎depth of 2425m have been drilled scattered at the studied area. In the first step, processing ‎sequences were applied for magnetic data to highlight the deep anomalies using the Oasis ‎montaj. Afterward, inverse modeling of the geoelectric profiles were done using Res2dinv and ‎the optimum location of drilling was proposed on the basis of qualitative interpretation of ‎geophysical real sections containing chargeability, resistivity and metal factor (MF). In the ‎following the depth variations map of geoelectric properties was plotted and interpreted for ‎inverted data in four depths of 10, 25, 43 and 78 meters. Afterward, to imagine the spatial ‎variations of the electrical properties of the region and proposing the most appropriate location ‎for drilling operation, the quasi three-dimensional solid model of Rs, IP and MF variations of the ‎deposit after the smoothness inversion was mapped using Rockworks. Plotting ore deposit cross-‎section along the geophysical profiles using the assay data from the boreholes, revealed that ‎drilling of some boreholes located on the profiles and independent of the results of geophysical ‎operation, has been carried out without any right logic, purpose and design with no ore body. ‎Also the qualitative accordance of the results of geoelectrical operations with the assay data ‎from boreholes having ore body, located on the geophysical profiles, showed in general a ‎moderate qualitative accordance between these data.‎