An area centred approximately 55 km west-southwest of Woomera was taken up to explore its IOCG mineralisation potential. Early field work consisted of the acquisition of infill gravity coverage over an irregular outline regional gravity low anomaly called the Apollo prospect, which lies in the centre of the licence. During October-November 2007, 731 new stations were read across an 800 m x 800 m survey grid covering the southern half of EL 3851. On-ground access to part of the eastern side of the survey grid was not achievable, so 126 stations from the originally specified coverage were not read. Instead, 12 detailed profile readings were taken at 800 m station spacing along a separate internal E-W line, and another 29 readings were taken at 200 m station spacing along a separate N-S line, for a total of 41 additional stations. During June 2008, Archer Exploration contracted UTS Geophysics to fly some close-spaced infill aeromagnetic profiles over the Apollo prospect to better delineate the positions of Gairdner Dolerite dykes that cross the gravity anomaly and thereby complicate its interpretation. Because encountering any of the dykes while drilling would be a major physical hindrance in efficiently testing the underlying IOCG target, the detailed magnetic data was needed by Archer Exploration for planning a diamond drillhole trajectory that would prevent this happening. 766 line km was flown along east-west lines spaced 100 m apart, with a sensor mean height above ground surface of 30 m. The resulting data was image processed to produce TMI, first vertical derivative and DTM maps. Later geophysical modelling of the low gravity and muted magnetic, non-IOCG character response recorded at the Apollo prospect indicated that a relatively low density, circular pipe-like body may be responsible for causing the geophysical anomaly there. A petrographic examination was then performed on a sample of Pandurra sandstone collected from the prospect, to determine whether the quartz within the rock had undergone any shock deformation. No evidence for shock deformation was detected, therefore an impact origin for the anomaly was considered unlikely. A single surface calcrete sample collected from the prospect was assayed for a wide range of geochemical trace elements, seeking indicators to buried ?kimberlite or other igneous rock-hosted mineralisation, but no significant values were returned. Aboriginal heritage protection clearance surveys were completed during early 2009 for drilling a single proposed diamond hole at Apollo, at a non-contentious site picked out 400 m away from the lake shoreline, although afterwards, both claimant groups that Archer Exploration had dealt with then withdrew their claims to the licence area, and a new, different claim was submitted. All other formal pre-drill preparations, including submission of an EWA to PIRSA, were also completed. It was expected that drilling would occur once clarity was given to the role of the new Native Title claimants, the Uwankara group. During the third licence year, Archer Exploration was notified by PIRSA that because of the continuing impasse with Native Title negotiations, obtaining a Section 23 ruling was now the best way for it to obtain the legal rights required for drilling to proceed on or near a registered sacred site (e.g. the Lake Gairdner National Park) because, under that particular jurisdiction scenario, no Aboriginal traditional owner clearances would be necessary, since the Minister of Aboriginal Affairs alone could give permission to disturb the ground at such a site. Accordingly, Archer Exploration then commenced the Section 23 process with the Department of Premier and Cabinet. Shortly afterwards, it was requested by the lawyer for the Kokotha Uwankara that the Section 23 application be withdrawn by Archer Exploration, and that an ILUA be signed. It was clear to Archer Exploration that the claimants did not yet realise that the practical scope of the heritage classification of the Lake Gairdner shoreline area required only Ministerial approval, and not that of the claimant group. Nevertheless, the process of getting this informed Ministerial approval would require all interested parties to be consulted, and not just the current claimant group. That would mean adversarial groups being obliged to be brought to the table to discuss the exploration. Also during the third licence year (2009-2010), Archer Exploration submitted an application for PACE Initiative Year 6 drilling funding for its proposed test of an inferred Rabbit Lake (Canadian Athabasca Basin) style unconformity - related uranium deposit represented by the Apollo prospect, and buried under 400-600 m thickness of sedimentary cover. However, this application was not successful. In mid-2010, Archer Exploration conducted check geochemical sampling (15 x 2-metre composites) of stored drill core from an earlier (August 1977) Dampier Mining Co. exploratory vertical diamond hole LH2 drilled on EL 298, which is the historic hole lying nearest to the Apollo prospect. Dampier at the time of drilling LH2 had noted a slight increase in downhole gamma ray log readings over the depth interval 460-490 m. LH2 (TD 507.15 m) lies about 6 km north of Apollo. No elevated uranium assay values or other notable results were returned. During licence year 4, Archer Exploration applied for PACE 2020 Frontiers programme funding to help cover the cost of a planned airborne EM survey designed to enhance the reliability of the Rabbit Lake mineralisation model proposed for Apollo. The company also recognised the relevance of additional new geophysical information released by DMITRE relating to gravity and magnetic worms, that had assisted in providing information about deeper structures within the area and had highlighted the possibility of mineralised skarns relating to deep circular features which had not been properly identified and explored. No work took place during the fifth year of EL 3851. Ownership of the licence was transferred to BHP Billiton Olympic Dam Corp. Pty Ltd in mid-2012.