Exploration for possible buried Ernest Henry or Olympic Dam style copper-gold mineralisation in the Nuckulla Hill area, 120 km north-east of Ceduna, did not progress during the first two years of tenure due to uncertainties in selecting a new remote detection exploration methodology which could resolve ambivalent calcrete geochemical sampling results for existing gold prospects. Aerial EM surveying, preferred by Equinox Resources as one obvious way to test the apparently real relationship between modestly elevated gold in soils and the presence of abundant disseminated pyrite in hydrothermally altered and brecciated granitoid bedrock at the Sheoak and Bimba prospects, did not eventuate as a sole venture exercise owing to high cost pressures. Instead, after Minotaur Operations farmed into the licence in July 2004, that company took over exploration management with a new focus on identifying iron oxide - associated copper-gold (IOCG) targets, using gravity as a first-pass discriminatory tool. It set out to acquire regional gravity data over the southern part of the licence area (1443 stations read at 1.6 km x 800 m station spacing), which disclosed significant gravity anomalies at Myall East and Arburee South. Following a field geological evaluation of these anomalies, additional regional gravity acquisition, plus infill coverage down to 400 m x 200 m station spacing, was undertaken during February-March 2005, which then firmed up Myall East as a possible IOCG drilling target. Three PACE Initiative funds-supported inclined RC drillholes totalling 767 m of penetration were put down to test the A4 gravity anomaly near the Myall prospect, in the southern portion of the Yarlbrinda Shear Zone. This drilling encountered coarse-grained gneissic granite, leucogranite, pegmatite, silica-rich mylonite, diorite and gabbro, all variably deformed, and all representing Palaeoproterozoic Tunkillia or St Peter Suite lithologies. The presence of gabbro was assumed to adequately account for the observed modest 3 mGal gravity anomaly. No anomalous downhole metal assay values were recorded, and therefore Minotaur concluded that the local potential for finding hematite-rich IOCG-style mineralisation adjacent to the Myall and Sheoak gold prospects had been downgraded. The locus of exploration then shifted to the northern portion of the renewed licence (EL 3460), where a subtle but large linear gravity feature runs north-south along the Yarlbrinda Shear Zone for ~25 km, broadening and becoming more prominent towards the northern end, attaining an amplitude of 4 mGal. Minotaur found that this geophysical feature had not previously been recognised or drilled. They noted that it coincides with zones of magnetic quiescence, and therefore could represent the signature of either IOCG-style mineralisation (haematite - dominated) or of a non-magnetic gabbro/diorite, which rocktype may have served as an excellent chemical trap for any gold-rich hydrothermal fluids circulating within the Yarlbrinda Shear Zone conduit at ~1590 Ma. To test such ideas, Minotaur in August 2007 carried out an east-west transect of aircore drilling, incorporating 21 vertical holes for a total penetration of 947 m, across the northern end of the gravity anomaly and across the adjacent Yarlbrinda Shear Zone. Below covering sands, clays and other sediments, all of the holes typically intersected saprolite derived from granitoids and dolerite bodies. Variable alteration (sericite, haematite and chlorite), shearing, brecciation and veining were noted in the geological logging. No geochemically anomalous results were returned from downhole sampling. The highest copper assays returned 0.2 ppb Au values found in a few plant samples taken in proximity to aircore hole NH07A05 which returned the isolated high gold Au value from saprolite. The noteworthy biogeochemical expression of gold occurrence thus appears to be extremely localised, however, the reliability of this interpretation is still uncertain as the dataset continues to be developed, analysed and crosschecked against results of other exploration techniques. In separate uranium exploration work begun during July-August 2006, Fugro Airborne Surveys carried out a regional airborne EM survey for Toro Energy covering ground situated south-west and south-east of Nuckulla Hill, including portions of EL 3460 along with the joint ventures' adjoining tenements EL 3166 (Childara Well) and EL 3094 (Glyde Hill). Approximately 100 line km were flown over EL 3460, using a flight line spacing of 1 km along north-south lines. The data were processed by Fugro to produce images of interpreted depth to bedrock. A Tertiary palaeochannel was clearly delineated, passing south of Childera Outstation and continuing across southern EL 3460. The channel has its headwaters near exposures of Gawler Range Volcanics near Nuckulla Hill, and trends south-eastwards initially before meandering westwards across southern EL 3460 onto adjoining EL 3166 (Childara Well).