A large area surrounding the southern end of Lake Eyre, which is known to be underlain by a thinning succession of Cretaceous basinal sediments, was taken up to explore for possible economic secondary sandstone-hosted uranium mineralisation. No field work took place on the project area during the two years it was held, due to slow progress in obtaining land access agreements with traditional owners. A desktop review of DMITRE's SARIG data base, looking for data from previous exploratory drillholes that had encountered the Cadna-owie Formation, the preferred target unit, identified several holes with drill core and chips still being retained at the Department's Core Library, which were analysed by the licensee to search for evidence of uranium anomalism. Work included geological logging, handheld scintillometer scans, magnetic susceptibility measurements and handheld Niton XRF analysis, plus follow-up full geochemical assaying of selected rock samples. Despite past drill records suggesting that the marginal Cretaceous rocks contain proximal amounts of sedimentary uranium, implying that more significant occurrences might lie in the deeper part of the Eromanga Basin where transport and reduction mechanisms would have had a better chance of taking effect, Rio Tinto's early research results yielded no evidence of uranium mineralisation, and gave very few signs that good prospectivity exists locally for discovering a sandstone-hosted uranium deposit. There appeared to be little organic matter in the sandstone, and the redox fronts that had been intersected were extremely small. Therefore, it was decided to surrender tenure of all of the project licences.