EL 3428, located 17 km south-west of the Olympic Dam deposit and 5 km south of the Acropolis prospect, was taken up by Uranium Exploration Australia (UXA) primarily to explore for copper-uranium-gold-silver-rare earth element (Cu-Au-U-REE+/-Ag) mineralisation of the IOCG style typified at Olympic Dam and also now being developed at Prominent Hill. Mineralisation of this style commonly occurs in Mesoproterozoic age intrusive, volcanic extrusive, metamorphic and brecciated units of the eastern Gawler Craton, which are overlain by the generally flat lying Mesoproterozoic to Phanerozoic sediments of the Stuart Shelf. Deep drilling from the surface is the only technique capable of proving the existence of mineralisation in such areas of extensive cover. UXA has been using modern GIS data management methods to integrate all of the available open file geophysical, geochemical and geological data in order to develop targets to explore for IOCG mineralisation across its multiple licence holdings on the eastern Gawler Craton. A review of past detailed aeromagnetic survey data indicated dominant north-west, north-east and north-south trending basement structures. These structures were interpreted as horst and graben features that would have influenced the extent of sedimentation and volcanism taking place since the Mesoproterozoic. The structures were formed during the Kimban Orogeny, and possibly some arose as early as the Sleafordian Orogeny. A depositional centre for the Mesoproterozoic Pandurra Formation, which has a maximum thickness of over 890 m, is centred on and around EL 3428. The Elizabeth Fault and Andamooka Fault are two major north-west orientated structures which have affected this deposition. Such structures are postulated to also relate to the proven mineralised corridor which bounds the UXA tenements, by providing conduits for hydrothermal fluids. The Bambridge Well prospect in the north of the licence area was selected by UXA from its review of geophysical data, principally that from PIRSA's airborne radiometric survey, the 2003 ANSIR Olympic Dam Seismic survey and WMC's 1981 aeromagnetic survey, as having excellent potential for hosting a haematite-rich uranium-copper-gold style of mineralisation. In April 2006, after making prior careful reconnaissance along public roads and fence lines, and taking into account stratigraphic information from previous nearby exploration drillholes, a drill site was chosen which was considered as the best location for encountering possible buried mineralisation at depths shallower than 400 m. In addition, because of the prospect's proximity to the Andamooka Thrust, there was potential for testing whether the rocks within it might be a source of geothermal energy between 400 m and 1200 m depth. The drilling of a single initial exploratory hole was scheduled for completion late in 2006, however,the operation had to be postponed indefinitely when unforseen problems arose with gaining permission from Defence Australia for access onto the Woomera Prohibited Area. Instead, alternative preliminary field work undertaken by UXA entailed the ground truthing of four interpreted uranium channel radiometric anomalies seen on regional datasets. Ground scintillometric scans of total count radioactivity were carried out, and a limited number of 300 g surface samples were taken for chemical and spectrometric analyses. Only one sample taken from near North Campbell Dam was anomalous, with faintly elevated uranium (2 ppm U) plus weakly elevated copper (17.4 ppm Cu) and zinc (74 ppm Zn). In August - September 2007, UXA commenced detailed ground-based gravity survey acquisition for the purpose of identifying further drilling targets. The Bambridge Well and Campbell Dam aeromagnetic anomalies were surveyed by contractor Haines Surveys, each grid having 110 stations read along a total of 19 traverses at 500 m station spacing, for an aggregate 137 line km. Subsequent gravity data processing, image interpretation and residual anomaly modelling indicated that extra infill gravity coverage was needed, so another 2 lines/32 stations and 6 lines/58 stations were added, read at 250 m intervals. [Note: UXA would have conducted an interpretation of this detailed gravity data, but the results have not yet been provided to PIRSA]. During March 2008, Daishsat Geodectic Surveyors were commissioned by UXA to conduct a ground-based regional gravity survey on EL 3428 to help elucidate regional geology and structures. This survey comprised 529 gravity stations at 800 m spacing, and was designed to give total coverage over the tenement. Mapped subtle gravity anomalies for the most part match the magnetic anomaly pattern due to the Gairdner Dyke Swarm. To the east, a gravity high traces a belt of Palaeoproterozoic Hutchison Group gneissic and schist units (as identified by Western Mining in 1981 in their Harcus Hill prospect drillhole HHD-1), but UXA have concluded that as a whole the data gained from this survey did not reveal any significant gravity anomalies.