A very large area of the remote far north-east of the State was taken up early in 2008 by the unlisted Thorne-Clarke family company, to explore for sediment-hosted secondary uranium mineralisation of the type found in intracratonic sedimentary basins in Kazahkstan in central Asia. Having the large licence holding of ~30,000 square km was regarded by the applicant as necessary in order to properly be able to test the exploration model in an Australian setting. During 2008, the first year of tenure, publically-available data including mapping, drill hole logging data and down hole geophysical data relevant to the tenements was reviewed in detail. Conceptual models were developed for exploring locally for possible large Kazakh style sandstone-hosted and other sedimentary roll- front type uranium mineralisation styles. An extensive shallow rotary mud drilling programme was designed to confirm the tenements' prospectivity for sedimentary uranium mineralisation, by testing previously recognised gamma ray log anomalies that had been recorded in a number of existing oil and gas exploration and production wells in the Big Lake, Moomba, Daralingie and Moorari prospect areas, and to test and confirm the hypothetical sedimentary uranium mineralisation models. In April 2008, prior to the execution of the rotary mud drilling, TC Development Corp. contracted Budd Drilling to drill some aircore holes on the Big Lake prospect on EL 4072, to test the effectiveness of this less expensive drilling method for testing the exploration targets. However, the test was abandoned early due to inability of the aircore method to reach the target depths, and because of poor sample returns. A total of 8 holes were drilled for 612 m. Subsequently, the rotary mud drilling programme of 146 vertical holes for 16,775 m total penetration was undertaken during the latter half of 2008 in Tertiary sediments within TC Development Corp.'s ELs 4069, 4071, 4072, 4076, and 4084. This first stage of exploration drilling gave much encouragement for the discovery of economic sedimentary uranium mineralisation. Historically reported logged radioactivity anomalies in petroleum wells were confirmed, and were characterised as sedimentary uranium occurrences, while target sand horizon environments potentially suitable for in situ leaching (ISL) extraction techniques were observed to be associated with the radioactivity anomalies. During 2009, exploration comprised a second stage programme designed to continue to validate and enhance the JV's exploration model in other areas of reported logged radioactivity previously untested for sedimentary uranium mineralisation. A total of 25 vertical rotary mud holes for 3294.1 m were drilled on ELs 4072, 4076 and 4086 to explore the Daralingie, Barina, Waukatanna, Deina and Verdelho prospects [Note: data for these drillholes is not part of the subject surrender dataset]. All of the drillholes were wireline logged within the rods, and where possible open hole resistivity and gamma ray logs were run. Further positive indicators for uranium prospectivity resulted from follow up drilling done near previously discovered Namba Formation palaeochannel sand - hosted mineralisation. In addition, several of these holes provided sediment chemostratigraphic data that in conjunction with historic well data was used to help establish a regional redox distribution pattern for both the prospective Eyre and Namba Formations. At the end of the 2009 drilling programme it was decided to conduct limited diamond coring to obtain uncontaminated samples of anomalous uranium mineralised intercepts and associated prospective sand horizons previously identified in several holes within the Big Lake prospect. It was considered that the core would be useful for confirming the sedimentological characteristics of the anomalous horizons, besides providing rock samples for assaying and for possible mineralogical and leach testing. The assay results would also indicate whether there had been any translocation of uranium away from gamma anomalies as a result of radioactive decay disequilibrium processes. Accordingly, 2 rotary mud holes were completed with diamond tails, twinned with Santos petroleum wells BL064 and BL080 which had logged uranium shows when previously being constructed. The pressed powder XRF assay results for samples taken from the two cored holes BLD084 and BLD085 indicated the presence of thin but highly anomalous uranium mineralisation in both holes, i.e. up to 1625 ppm U3O8 over a 7.5 cm interval in BLD084 and 864 ppm U3O8 over a 10 cm interval in BLD085. In both holes, anomalous but much lower uranium levels are present in samples coming from immediately adjacent to, and mainly below, the highly anomalous samples. The broader anomalous zone in both holes is ~40 cm wide. The calculated weighted average grade for the full 40 cm wide mineralised zone in each holes is: BLD084 (BL064) 87.0-87.4 m depth; 329 ppm U3O8 BLD085 (BL080) 105.7-106.1 m depth; 247 ppm U3O8. In conclusion, sedimentary uranium mineralisation within the Tertiary Namba Formation, indicated by gamma ray log anomalism and confirmed by anomalous and sub-economic assayed intercepts, was encountered in many of the JV's drillholes. The mineralisation is generally associated with aquacluded and porous channel sand horizons that are believed to be portions of broad, uranium - prospective palaeochannel systems. It is thought that the mineralisation found at the prospects so far drilled is almost certainly residual uranium occurrences left behind on aquifer or channel margins from an advancing (possibly spasmodically) mineralised redox cell or front. Any channel sands exhibiting radiometric anomalism further down the hydraulic gradient, and/or where oxidised uranium-laden groundwaters may have encountered reducing environments, such as on channel bends, near other flow obstructions or in stagnant low hydraulic flux environments, are therefore considered to be highly prospective places for finding significant amounts of redox front - precipitated mineralisation. Adverse climatic conditions, causing abnormally excessive rain and flooding over the entire project acreage during the three years 2010-2012, prevented any access there then for conducting field work, and in particular, all planned further drilling had to be postponed. Instead, during the first part of 2010, a comprehensive desktop analysis of petroleum well data was performed which resulted in the development of a robust model for enhancing the prospectivity of the Eyre Formation to host economic uranium mineralisation within the Sturt Joint Venture’s tenement package. Orientation drilling was planned to be done at the Tirrawarra and Merrimelia prospects, as a prelude to a wider-ranging drilling campaign targeting interpreted Eyre Formation palaeochannels. However, the breakup of the joint venture which occurred in March 2013, and the licensee's inability to attract another funding partner, led to the decision to surrender most of the project licences at the end of that year.