Renewed exploration of the Burra hills district for possible economic copper and other mineralisation has continued the type of work that was done within SML 68 by the previous explorer, Australian Geophysical Pty Ltd. Reconnaissance stream sediment surveys and geological appraisal of known surface prospects were followed by two rounds of vertical percussion drilling on separate mineralised zones at the Princess Royal mine (12 holes totalling approx 1020 feet in September 1970, and 5 holes totalling 1205+ feet in March 1971), plus later additional percussion drilling at the Edelweiss mine (2 holes for 850 feet). Both prospects have deep-seated IP anomalies underlying thick surface gossans, so these were the primary drilling targets, but badly fractured ground and high groundwater influx from beneath the water table at 120-160 feet depth made all drilling and sampling operations difficult. Maximum metal values returned from sampling at 5-foot intervals were 2400 ppm Cu at 210 feet in PDH PR1, from a highly brecciated siliceous dolomite, and 2100 ppm Cu at 395 feet in PDH PR4. The downhole sampling carried out beneath Edelweiss prospect returned similar low-tenor values, e.g. 1300 ppm Cu at 250 feet depth in hole PDH E2, accompanied by < 100 ppm V. It was concluded that these results gave little encouragement for further deep drilling under these mines, especially considering the often complex, drag style medium-scale fold and intense fault structuring which apparently controls the emplacement of thin ore-bearing quartz-carbonate veins. Copper geochemical anomalies of note were seen in drainages lying to the east and south-east of the overturned anticlinal fold structures which have the old mines developed on their brecciated and eroded crests. A third, undeveloped outcropping azurite and malachite-mineralised zone at Princess Royal which is associated with a transition from dolomite to shale country rocks was channel-sampled over a 5000 foot strike length, returning an average 6.9% Cu.