A large area centred ~80 km north-east of Moomba has been explored for possible buried economic Tertiary to Recent sedimentary uranium mineralisation of roll front style, similar to what occurs as fluvial sandstone - hosted giant secondary deposits within the Syrdarya and Chu-Sarysu basins of central Kazakhstan. During the first eight months of tenure of EL 4086, a comprehensive desktop analysis of available data from historic petroleum exploration and production wells located within the Sturt Joint Venture’s tenement package resulted in the development of a robust, enhanced prospectivity model for Eyre Formation - hosted economic uranium mineralisation. To test this model, 5 vertical open rotary mud holes with a total penetration of 676 m were drilled on EL 4086 in July-August 2009, as part of a more extensive drilling programme spread over surrounding tenements. The primary intention was to twin existing petroleum wells to verify anomalous gamma ray log signatures recorded within these wells, and then to step out to further define anomalous or mineralized zones. Information about the lithology and redox state of these zones within the host channel sediments could then be used to vector towards the active roll front position where the uranium grade is at its highest. Drillhole separation was normally between 100 m and 200 m, depending on the holes' geological objectives. Encouraging geophysical log indications of the presence of uranium within Eyre Formation channel sands were encountered in 3 of the holes drilled on the subject licence, although no assaying of the drill cuttings recovered from the anomalous intervals was done. The successful holes were drilled close to the Santos Ltd Bow 2 gas production well that had exhibited a gamma ray log anomaly at the base of the Eyre Formation. All three holes recorded small radioactivity anomalies (less than or equal to 100 cps) within carbonaceous clays immediately below the base of thick oxidised sands of the Eyre Formation. Hole BM004 with the best result had a log anomaly of 100 cps and a calculated uranium grade of 35 ppm eU3O8. Hole BM002 was drilled adjacent to the Dullingari North 18 well. This hole confirmed the original small anomaly noted in that well's gamma ray log trace within intraformational clays within the Eyre Formation. It was observed from the drill cuttings of BM002 that the sands in the upper Eyre Formation are clearly oxidised, whilst other sands below a thick central clay unit (hosting the anomaly) appear reduced. This suggested that the upper and lower parts of the formation are separated by an aquaclude (the clay unit) and that oxidising uraniferous fluids had passed through the upper sands and deposited residual uranium on reducing clay, but did not interact with the lower sands, which have remained reduced. Hole BM005 was drilled adjacent to the Dullingari 52 well. This hole failed to confirm the original small anomaly which had been noted within intraformational clays within in the Eyre Formation. Here too it was observed that the sands in the upper Eyre Formation of BM005 are oxidised, but those lying below a thick central clay unit are reduced. Therefore the same restricted flow of oxidised mineralising fluid as inferred for Dullingari North was believed to have occurred here also. Because of the need to reduce the project's total licence holdings and rental commitments, the joint venture partners decided late in 2013 to fully surrender EL 4086, since it was a lower priority target area compared to their other tenements lying to the north-west.