Following a review of existing regional geophysical and geological data for the north-western Stuart Shelf, grid-based gravity and ground magnetic surveys were run to further outline two broad gravity highs associated with discrete magnetic anomalies, which it was hoped might have potential for Olympic Dam style Cu-U-Au deposits. These features were tested by 2 diamond drillholes. DP2 entered un-mineralised Pandurra Formation below the Mesozoic cover, and remained in it over the depth interval 204.5 - 860 m. DP1 (total depth 616.6 m) entered volcanics of a similar density to the Pandurra Formation at 166 m depth. Geochemical and petrographic analyses of the DP1 volcanics, which included both acid and basic material, indicated affinities with both the Gawler Range and Roopena Volcanics, but no genetic relationship to the younger Beda Volcanics. A subsequent detailed gravity survey indicated the existence of a fault between the two drill sites, which probably accounts for the major stratigraphic displacement between them. Water sampling of 13 bores in the vicinity showed no significant uranium values. As part of a second-stage joint venture exploration programme, minor quantities of kimberlite indicator minerals were recovered from the No. 10 Creek and Paisley Creek areas, but are thought to be related to secondary sources. Extensive follow-up stream sampling, bulk sediment sampling, ground magnetic surveys, trenching of shallow anomalies, and remote sensing investigations of geological structures, all yielded negative results for disclosing microdiamonds or kimberlite targets.