The subject licence area, comprising two sub-blocks centred approximately 20 km north-west of Kimba, and which lies within the middle part of the NNE trending Campoona Syncline region located on central Eyre Peninsula, has been explored, in concert with work being done on adjacent acreage, by Lincoln Minerals, who targeted a large range of potentially economic basement-hosted polymetallic and other mineral occurrences including iron ore, Menninnie Dam style Pb-Zn-Ag (Cu-Au) mineralisation, Ni-Co, graphite, manganese and unconformity type uranium. Centrex Metals co-ventured with Lincoln Minerals so as to earn all of the rights to exploit any economic iron ore deposits which the area might contain. During licence Year 1, Lincoln Minerals undertook reconnaissance surface calcrete sampling throughout the Cockabidnie Project area, that included sampling the northern sub-block of EL 3884 on a 500 m grid spacing (74 samples collected). Following the earlier discovery of nickel-cobalt mineralisation by Lincoln Minerals on EL 3690 in 2007, the data produced from previous shallow bedrock RAB drilling undertaken by CRA Exploration in 1981 and others was reviewed and digitised. The old bottom-hole RAB drill cuttings samples had not originally been assayed for nickel, so Lincoln Minerals retrieved those samples from Challenger Geological Services and re-assayed them. The drillhole sample pathfinder element assay results, combined with interpretation of aeromagnetic maps and calcrete geochemistry, identified a potential zone of lateritic nickel mineralisation over a strike length of at least 5 km within EL 3609. The mineralisation occurs at a depth of about 15-20 m beneath shallow cover in the Campoona Syncline, and overlies gabbroic amphibolite containing up to 0.2% Ni in fresh bedrock, but does not appear to extend onto EL 3884. In other work, a detailed low-level aeromagnetic and radiometric survey was flown over the northern sub-block of EL 3884 during February 2007, under a joint arrangement between Centrex Metals Limited and Lincoln Minerals Limited. Coverage was 1934 line km along east-west flight lines spaced 100 m apart, using a 50 m mean sensor height above the ground surface. No field work took place on EL 3884 during Year 2. During licence Year 3, an airborne gravity full tensor gradiometer (FTG) survey was flown for Centrex Metals over EL 3884 and parts of ELs 3609 and 3498, to assist the company with designing its drill programme to search for industrial minerals, iron ore and diamonds. The survey was flown during August-September 2009 along 56 lines spaced 200 m apart, with a nominal 80 m FTG platform elevation above surface, for 775 line km. Six tensor component maps were generated showing gridded and levelled, terrain corrected data. A geophysical consultant's interpretation of all of the potential field data available to Centrex for the Campoona Syncline recommended 22 possible iron ore drilling targets accorded five priorities, with most targets probably lying at around 200 m depth or shallower. No field work took place on EL 3884 during Year 4. During licence Year 5, an airborne EM (TEMPEST) survey was flown for Lincoln Minerals over EL 3884, as part of a larger, PACE 2020 Initiative partly SA Government - subsidised survey that also covered parts of ELs 4883 and 4539 (for the relevant project PT1-16 final report, see Env 12371). The TEMPEST time domain airborne EM method, mounted on a fixed-wing aircraft, was selected for use because it is able to quickly acquire broad transects of transient EM data that are applicable to bedrock resistivity mapping plus direct detection of conductive bodies such as amphibolite intrusions and graphite-rich horizons. Lincoln's objective in acquiring AEM data here was to try to identify any conductive buried Ni-Co mineralisation and to target additional nickel-cobalt-scandium resources. During licence Year 6, Lincoln Minerals continued its ongoing review and interpretation of regional geological, geophysical, drilling and geochemical data for the Campoona Syncline, now with an emphasis on graphite, and also inspected some historic drill cores held in storage by DMITRE, and re-sampled them for their graphite content. However, no resource classification work was able to be completed due to the limited number of graphite assay results available. No further work ensued during licence years 7 through 9. Lincoln Minerals maintained a watch on stock market releases of technical information being made by companies holding surrounding acreage. Following the relinquishment of the adjoining Cockabidnie EL 4883 by Centrex Metals Limited, Lincoln Minerals applied for the subsequent ERA but was unsuccessful in obtaining a new licence. This drawback made it impractical for Lincoln Minerals to continue exploration on such a small, isolated area as the subject EL 5091 had now become. Furthermore, the shortage of exploration funds in the prevailing financial climate had meant that Lincoln needed to prioritise its exploration effort onto other areas. Consequently the decision was made to allow tenure to lapse at the end of licence Year 9.