The Tanner Dam Project was acquired to explore for concealed structural-related gold mineralisation, and Olympic Dam / Mount Leyshon - type hydrothermal or epigenetic base metal deposits, both associated with Gawler Range Volcanics and Hiltaba Suite granites within an area located 110 km north-west from Kimba. A detailed, 5800 line km airborne magnetic and radiometric survey was acquired during November-December 1996, along east-west flight lines spaced 100 m apart and using a 50 m terrain clearance, over the Tanner Dam granite and a major fracture system to the south. Interpretation of the new aeromagnetic data identified a number of targets. Subsequent field work included regional stream sediment geochemical sampling, rock chip sampling, and reconnaissance geological mapping. Anomalous gold was reported from four stream sediment samples, and anomalous Pb, Zn and Cu in grid-based rock chip/float samples. Three reverse circulation drillholes for 600 m tested the rock chip anomalies, returning best values of 12 ppb Au, 1.1% Pb and 0.1% Cu. A ground gravity survey was acquired over the Tanner Dam granite during December 1998, with 860 stations read at 500 m centres, which revealed six residual gravity anomalies, four of which were tested by reverse circulation drilling (four holes, total 539 m). Anomalous Zn and Ag were reported from one hole, but the gravity anomalies were not explained. A broad SW-NE trending valley south of Tanner Dam marks the locus of an important NE-SW trending fault, which exhibits intense demagnetisation for 9 km of its strike length, and appears to have consistent dilational jogs, inflexions and secondary splays suggestive of a major episode of sinistral displacement. Drilling in this area late in 2000 (11 RAB/aircore holes totalling 629 m put in along a single traverse) targeted the demagnetised section, but returned no significant results. A single line of 12.5 km of dipole-dipole IP/resistivity profiling conducted across the Tanner Dam granite early in 2002 suggested that this method would be effective in locating disseminated sulphides in the local geological environment.