Exploration targeting possible economic sedimentary, roll front - style uranium mineralisation which might have formed in buried palaeochannels within the Mesozoic Eromanga Basin along its western margin, approximately 115 km north-east of Marla, commenced with the acquisition during June-July 2007 of a 9345 line km airborne REPTEM survey across the entirety of ELs 3964 and 3982, flown along 1 km spaced N-S lines, seeking to map sinuous conductive anomalies that could represent saline groundwater lenses ponded within any buried palaeochannels. Possible redox boundary targets lying at shallow depth within the Jurassic Algebuckina Sandstone aquifer were further delineated during August-September 2008 with 4 lines of ground microgravity readings (961 stations read at either 50 m or 100 m station spacing), aimed at identifying low points in the underlying basement unconformity which could favour the development of local carbon sinks that preferentially would entrap uranium moving through the groundwater system downgradient from sources within the Musgrave Province basement. A review of previous exploration reports had indicated the presence of favourable host rocks and downhole radiometric anomalism within the project area. Rotary mud exploratory drilling (23 vertical open holes for a total penetration of 4444 m) took place on EL 3964 during February-April 2008, with all holes sited to test AEM anomalies. 15 of the holes reached the pre-Mesozoic basement, but drilling difficulties precluded the remaining 8 from doing so. The drill cuttings samples were taken as composites over 2 m depth intervals, and 977 samples from the target Algebuckina Sandstone were submitted for XRF analysis to detect uranium and thorium. Only 39 samples taken from five of the drillholes returned uranium values that were above the 5 ppm U lower detection limit. Subsequent wireline geophysical logging of 21 drillholes with gamma ray and conductivity tools recorded radioactivity peaks of between 100 and 150 counts per second within the Algebuckina Sandstone in nine holes, which after tool calibration calculations were found to correspond to mildly anomalous indicated peak uranium concentrations of 60 ppm eU3O8. The maximum equivalent downhole sample assay result was 23 ppm U (39 drill cuttings samples had returned from 5-23 ppm U, but only 3 drillholes had samples yielding >10 ppm U). The Cretaceous Bulldog Shale and Coorikiana Sandstone showed higher conductivities than the Algebuckina Sandstone and the post-Mesozoic strata, with several prominent peaks that can be correlated between drillholes. Conductivity log spikes of up to 300 mSieverts per m are present in the Bulldog Shale, and make excellent stratigraphic markers. A second campaign of rotary mud drilling (4 vertical open holes for 742 m) was conducted along the previous microgravity traverse lines on EL 3982 during September 2008, to test the validity of modelled depth-to-basement profiles. Hole TDs ranged from 108 to 228 m, at bit refusal in basement. After considering all of the above drilling results, Eromanga Uranium concluded that: - first round drilling had established that the REPTEM conductive anomalies represent outcrop and near surface distribution of the conductive Bulldog Shale. The high downhole conductivities in the Bulldog Shale and Coorikiana Sandstone confirm this relationship. - second round drilling had successfully targeted basement lows (i.e. possible Algebuckina Sandstone palaeochannels) as predicted by the microgravity traverses. - prospective Algebuckina Sandstone showing a mixed oxidation state was encountered in most drillholes. However, in holes furthest from the Mesozoic basin margin, the Algebuckina Sandstone is almost entirely reduced. In the more proximal holes, it is completely oxidised. - geochemical analyses of drill cuttings failed to detect significant concentrations of uranium. Slight uranium anomalism is associated with gamma log spikes, which in turn are associated with carbonaceous mudstone. - the rotary mud drilling process provides a poor sample medium for geochemical analysis. Such analyses are regarded as useful for reconnaissance purposes only. Nonetheless, calculations of eU308 from gamma ray curves have confirmed the mildly anomalous uranium content of the Algebuckina Sandstone. The licensee considered that these results did not warrant undertaking further work on the subject tenements, and after no activity ensued for the next three years, a decision was made in October 2011 not to renew their tenure for the fifth and last year of term.