Exploration for possible concealed, mesothermal, structurally-controlled Cu-Au deposits within an area located between Calca and Wirrulla on Eyre Peninsula comprised calcrete geochemical sampling, ground magnetic surveying and RC/aircore drilling of four aeromagnetic targets (47 RAB holes, total 2418 m). The majority of drillholes bottomed several metres into Precambrian basement consisting either of layered igneous rocks (monzonite-diorite-gabbro), mafic schists or Hiltaba Suite granite intrusions, with the former often exhibiting signs of weak propylitic alteration. No significant gold or base metal bedrock anomalies were found, except for 3 m grading at 525 ppm Mo in fresh Hiltaba Suite granite at Yantanabie prospect. Weakly elevated supergene Pb (up to 1245 ppm over 3 m in hole SBRC45 at Colba prospect) and Zn (up to 554 ppm over 3 m in hole SBRC2 at Petina prospect) were recorded from Cainozoic cover sediments in many of the drillholes. Several aeromagnetic structural targets remain to be tested. No relationship was discernible between rock type or structure, as interpreted from aeromagnetic data, and trends of weakly elevated calcrete copper values (<10.2 ppm Cu). Calcrete sampling was thus concluded to be a poor indicator of bedrock mineralisation in this area of thick (up to 80 m) Cainozoic cover.