One vertical stratigraphic diamond drillhole [the 1a re-drill] was fully cored to 1450 m total depth over a regional gravity high in the western half of the licence which was thought to be prospective for Olympic Dam type polymetallic mineralisation hosted by Mesoproterozoic rocks, but the hole was terminated in Sturtian glacials above pre-Adelaidean basement without intersecting significant mineralisation. Three traverses of seismic reflection data acquired by Chevron across the Yarra Wurta prospect near the end of drilling suggested that the top of pre-Adelaidean basement in this area is likely to be 2000-2200 m below surface. Other work comprised 1:50,000 scale surface photogeological mapping of the entire licence area, limited soil sampling (80 samples), downhole geophysical logging of SCYW-79-1a, a consultant's examination of drill core petrological thin sections, the inspection of stored drill core from Newmont's nearby earlier drilled deep diamond hole SR17, acquisition of infill gravity traverses over the Yarra Wurta prospect regional gravity anomaly (70 new stations read and 40 existing stations re-read), plus later separate acquisition of grid-based gravity coverage and complementary ground magnetic surveys totalling 46 line km. As part of a later farm-in by BHP Minerals addressing diamond potential, recently released aeromagnetic data were recontoured by them to fit in with the seismic reflector evidence of basement depth. A separately identified, kimberlite style discrete aeromagnetic anomaly was not able to be substantiated by follow-up ground magnetic surveys.