A licence area consisting of two separate sub-blocks located on the plains extending to the west of the Middleback Range on north-eastern Eyre Peninsula was taken up to explore for possible economic buried deposits of stratabound magnetite iron ore which might occur in Palaeoproterozoic basement metasediments, as well as for any economic base or precious metal mineralisation that might also occur in the basement rocks. During the majority of its tenure term, very little field work was conducted on the subject ground. Initially, office studies of available geophysical and open file geological data were performed during 2005 to try to identify possible drilling targets. Reprocessing of historic government and company open file aeromagnetic data was done for the entire portfolio of Centrex Metals' SA exploration tenements. Data spacing and quality were variable, which led to some uncertainty in drill target selections. Consequently, in February 2007 a new airborne magnetic, radiometric and digital terrain survey was flown, for 2545 line km acquired within EL 4571 at a line spacing of 100 m and a nominal sensor height of 50 m above the ground surface. This survey covered all five West Middleback region tenements, with the survey expenses and data shared between Centrex Metals and Lincoln Minerals. Full details of the 2005 reprocessing and the 2007 survey, and the survey’s data, are available from Envelope 11449. During 2008, Lincoln Minerals collected 42 reconnaissance surface calcrete samples on a 500 m grid over EL 4571, and these were assayed much later on, in 2014. No anomalous trace metal values were returned. Detailed geological and structural mapping, and outcrop rock chip sampling on EL 4571, occurred during 2009-2010 as part of a larger mapping exercise addressing the entire West Middleback region. New outcrops of the Cooyerdoo Granite and many other rocks were recognised within EL 4571, and follow-up PACE funded collaborative geochronology studies (results are published in Report Book 2011/00003 and discussed herein) revealed additional rocks that were over 3000 million years old. During May 2010, the iron ore - related and modal mineralogical compositions of 13 selected outcrop samples of BIF, ferricrete and associated other prevalent bedrock units were determined by laboratory semi-quantitative XRF analysis. No mechanical drilling was undertaken by Centrex Metals or Lincoln Minerals (or SAIOG) within the subject licence area. A hand powered post hole digger was used to bore holes into lakebeds and regolith to ascertain thicknesses of potential detrital iron ores. These holes were backfilled immediately after their contents and layering had been examined.