Exploration for possible buried economic iron oxide - associated copper-gold (IOCG) mineral deposit targets within the subject relinquished area of the south-central Gawler Ranges utilised existing regional gravity data to attempt to identify anomalous altered basement zones. Most recently, EL 3456 had been covered by a major government-funded helicopter-borne regional gravity survey acquired in April-May 2005, utilising a station spacing of ~2 km x 2 km. Minotaur's interpretation of the gravity data found no significant gravity anomalies with typical Gawler Range Volcanics and Hiltaba Suite granite characteristics occurring on the relinquished portion of EL 3456. It was concluded that the absence of historic drillhole data within the relinquished area, combined with the lack of significant gravity features, indicates that the relinquished portion of EL 3456 has less potential than the retained ground to host the mineralisation styles which the joint venturers are seeking, i.e. Mesoproterozoic IOCG mineralisation, Tunkillia style Fe-poor Au mineralisation, or Menininnie Dam type Ag-Pb-Zn mineralisation formed within Palaeoproterozoic rocks. In a separate search for sedimentary uranium mineralisation conducted by Toro Energy, no target Tertiary palaeochannels were able to be mapped using available daytime satellite pass - only ASTER imagery. In addition, a subsequent review of pre-existing geological and geophysical data determined that there is no significant potential for this kind of mineralisation to occur on the now relinquished portion of EL 3456.