Abstract: The Pb+Zn mine, in Afşin-Hüyüklü is already under the production. In order to direct thefuture explotation, geoelectrical surveys were conducted to determine extensional existance, dimensionand possible reserve of the are deposit. To accomplish that d.c. geoelectrical and natural polarizationmeasurements were taken over an andesite covered 45 000 m2 large area and along the profiles each ofwhich has 300 meter length and with sampling interval of 5 meters. Three conductive depositional basinswere located to be extending in E-W direction. Medium basin is already proven and is underproduction.This basin is recognized with lower average resistivity of 200 Ohm-meters, and it is surrounded withrelatively resistive flanks that of which is 450 Ohm - meters. The estimated widh of the basin is 120 to150 meters. There are two, four-and one conductive minearl zones in these basins from north to south,respectively. There zones extends in N60°E direction, and inclines to the north with an angle between 45 to60° and have various withd of 10 to 40 meters and resis tivities in the range of 100-150 Ohm - meters. The oreveins, underproduction take place in one of these zones. From the interpretation of the natural polarization profiles, it is determined that average depth of the mineralization starts from 10-15 meters andextends up to 100 meters below the surface. By using the interpretation results new locations for production galleries were recommended and possible expected reserve was estimated which is about 320 000tons, in the medium basin.