Ongoing exploration of copper prospects within diapiric raft blocks of Adelaidean metasediments at Beltana has concentrated on the vicinity of historic underground mine workings where evidence of primary sulphide mineralisation can still be seen at the surface, or where significant soil geochemical anomalies exist over buried lode traces. Detailed gravity surveys were run over grids centred on the main shafts of the Copper Queen and Iron Blow mines, and an inclined diamond drillhole (CQ17) was put down to 500 feet total depth at the former prospect to probe under the old workings to find the source of a 0.2 mGal negative gravity anomaly. The hoped-for zone of supergene Cu enrichment was not found, with no appreciable mineralisation evident. A planned second diamond hole to test a similar, 0.37 mGal gravity low target at Iron Blow was therefore cancelled, with only the percussion pre-collar being completed (IB6) to 150 feet depth. Minor low grade secondary copper mineralisation was seen near the surface in this drillhole. Subsequent work in SML 360 then concentrated on follow-up of an encouraging downhole result obtained in percussion hole BF that was drilled at the Black Feather prospect in December 1969, where a malachite-mineralised fault zone carrying an average 0.62% Cu over 65 feet was encountered within the Bunyeroo Formation, that appeared to increase in grade towards 1.1% Cu at hole end. Seven rotary percussion holes totalling 1130 feet, with the last two holes having wireline diamond-cored tails totalling 409 feet, were put down close to the BF location to appraise this occurrence. Percussion hole BFD had the best results, with a composite sample from the depth interval 102-162 feet averaging 1.1% Cu, as finely disseminated chalcopyrite in abundant thin and irregular siderite and calcite veins. The two deep diamond holes gave very disappointing values, nowhere more than 0.2% Cu, and in general grading at less than 0.01% Cu, as here the target fault zone was not evident. It was concluded that the Black Feather lode contains poddy mineralisation that thins rapidly with depth and along strike. An induced polarisation survey was carried out at the Black Feather, Enterprise and Harvey's Return prospects, to test for possible outlying mineralisation at distance away from the old workings. No IP anomalies were apparent at Black Feather, while a pair of percussion holes aggregating 291 feet, that were put down on weak IP anomalies underlying intact mineralised lode outcrops at the other prospects, showed that here also the fault zone siderite veins thinned rapidly with depth.