An area surrounding the township of Kingoonya and straddling the Trans Australia Railway line, that comprises six tenement sub-blocks,has been explored for possible economic occurrences of buried Tertiary roll-front style secondary uranium...
An area surrounding the township of Kingoonya and straddling the Trans Australia Railway line, that comprises six tenement sub-blocks,has been explored for possible economic occurrences of buried Tertiary roll-front style secondary uranium mineralisation that may have formed within the upper reaches of the Kingoonya Palaeochannel System, proximal to uraniferous granite bodies. Potential for finding possible Proterozoic unconformity-style uranium deposits and economic base metal or gold mineralisation associated with Archaean to Proterozoic basement igneous bodies and structural features was also recognised. During May 2007, a reconnaissance helicopter-borne EM survey was acquired over the western half of EL 3655, along four 2 km spaced east-west flight lines totalling ~60 line km, to assist with mapping the geography of the palaeodrainage floodplains. During the second, third and fourth licence years, no field work took place, while land access negotiations were in progress with the local Native Title custodians, preparatory to conducting a rotary mud drilling campaign to evaluate interpreted buried palaeochannel sediments. Following the entry of AngloGold Ashanti to the project, that company undertook a major phase of acquisition of new geophysical data, in an attempt to generate IOCG mineralisation drill targets that could be related to the very large "Shellback" regional magnetic anomaly lying partly under the southern third of EL 3655. AngloGold's exploration model envisaged a very large, Hiltaba Suite - related IOCG deposit present in the Archaean to Palaeoproterozoic rocks lying underneath the Gawler Range Volcanics sequence in this area. The company was of the opinion that the known hydrothermal gold deposits of the Central Gawler Gold Province could represent vectorial "smoke", i.e. distal dispersions along communicating structures, that have arisen from a giant IOCG deposit of this well-hidden nature. During April 2011, Atlas Geophysics were contracted to perform a semi-regional ground gravity survey across part of EL 3655 and all of EL 4573: in the south-eastern part of the former, subject licence, 386 stations were read on a regular 400 m x 400 m grid. During September 2011, Aeroquest were contracted to fly a detailed airborne magnetic and radiometric survey across the Gairdner Project licences, with 662 line km flown within EL 3655 along north-south flight lines spaced 100 m apart, using a 50 m mean sensor elevation above the ground surface. The new magnetic data revealed more detailed, but mainly NNW trending magnetic anomalies, which AngloGold interpreted as reflecting probable Gairdner Suite mafic dykes. It was debatable whether further geophysical data reinterpretation or inputs from follow-up surveys would improve the targeting situation for the exploration model. After AngloGold withdrew from the joint venture in early 2013, no further field work took place on EL 4882 until Stellar Resources decided to surrender tenure. Unsuccessful attempts were made to attract another joint venture partner, and attempts were made to appraise the Hicks Hill jaspilite occurrence which lies partly on EL 4882, but an Aboriginal heritage exclusion zone which had been imposed there hindered any work access, besides which, newly prevailing poor market conditions for iron ore made a current resource assessment unwarranted.
More +