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Induced polarization (IP) and resistivity (Res) methods were used at “Buraco do Inferno” cave, associated with João Rodrigues River Karst System, to detection subsurface dissolution zones in limestone rocks of the Bambuí Group in São Desidério region, State of Bahia. The IP delimited the coverage zone formed by sandstoneclay soils, while the resistivity determined conductive zones within the limestone domain below the soil layer. In these conductive zones, the caves with resistivity less than 300 Ohm.m were interpreted, which concur with the saturated zone. Given the obtained results we verified that the resistivity obtained the optimum identification of the cavities and geoelectric discontinuities. The chargeability was complementary in the identification of the cover layer given by the membrane polarization formed by the clayey constituents.

Resistivity and induced polarization applied to “Buraco do Inferno” Cave, São Desidério, State of Bahia, Brazil