In a search for possible economic primary or secondary uranium deposits in the Rudall area, five streambed mud samples and 2 springwater samples from the Driver River drainage basin were analysed for Central Pacific Minerals by the Australian Atomic Energy Commission to determine the radioactive decay source elements for radium traces previously detected at this location. The tests revealed that the mud was producing gamma radiation derived from daughter products of uranium-238, and that no thorium was present. The groundwater yielded no gamma emissions. Previous geophysical field work undertaken by CPM had found that all parts of the Driver River drainage system exhibited anomalous radioactivity at surface (being > 4 x background), ranging up to 5200 counts per second in a salt lake that overlies the spring discharge source of the river water. It was also observed that this radioactivity decreases going away from the water source point, and that it fades rapidly when the downstream host carbonaceous muds are removed from the river bed in sampling, which indicates that the radioactivity is emanating from an isotope having a short half-life. Thus the likelihood of discovering a significant secondary uranium deposit within the surfical sediments on the licence was considered remote. A re-interpretation of some detailed aeromagnetic data previously flown over the Driver River basin disclosed a pair of intersecting, probable fault lineaments at the river source, which meet between the sites of earlier Kerr-McGee exploratory drillholes V3 and V4. It was inferred by CPM that the radium and radioactive radon gas being recorded could be coming from primary uranium mineralisation or its dissolved dispersions present in the fault zone. However, seismic and further drilling work which was planned to test this model did not eventuate before it was decided for economic reasons to surrender the licence.