An area located just to the east of the edge of the Nullarbor Plain, occupied by many scattered large and small salt lakes surrounded by sand dunes, with Precambrian basement [of the western Gawler Craton] subcropping near the surface, has been explored for possible economic occurrences of primary and secondary uranium mineralisation. Work began with acquisition of a low level airborne radiometric survey along variously orientated close-spaced flight lines crossing the salt lakes, using a sensor mean elevation above the ground surface of 65 m. This was followed by on-ground traversing using hand-held scintillometers to follow-up radiometric anomalies, and then doing hand auger drilling of the lake bed sedimentary sequence (initially of 4 vertical test holes for 37.7 m) which it was found could be up to 20 m thick. Total count anomalies of up to 22 times background were recorded, of the order of 15,000 counts per second, especially on Lake High but on many other small lakes or parts of larger lakes too. This work continued on from July 1972 for the rest of the first licence year, with 188 auger holes completed to provide sediment samples which were assayed for uranium, thorium and lead. Some 70 of the auger drillholes were put in using a Jacro power drill rig hired from Warne Drilling that was transported around the lakes by helicopter, in order to penetrate the thickest lake sediments. It was found that the highest uranium content occurs in Eocene age lignitic sediments (maximum 643 ppm U). Also, the uranium and its daughter products are spatially separated, meaning that the measured radiation coming from leached and mobilised radium and other decay radionuclides does not directly indicate where the uranium lies. Ground water was sampled for analysis from both the auger holes on the lakes and from the few station water bores sunk on plateaux in the surrounding countryside. The former yielded higher uranium values (up to 50 ppb U as compared to 1-3 ppb U) which it was thought could be a function of the water's pH value and ability to dissolve uranium. No field work was done during licence Year 2 owing to heavy rain making the lakes impassable. A further study was made of the local geology and landforms, and it concluded that the prospectivity for a signficant uranium orebody had become diminished through CRAE obtaining a better understanding of the basement-cover relationship in the area. The lignites were no longer considered to represent a worthwhile exploration target. Accordingly, tenure was fully surrendered.