The metallurgical testwork program was designed to confirm the most cost-effective processing route for each ore type confirmed within the large, rapidly developing Western and Eastern Corridor mineralised complex which make up the Cardinia area.
Mineralisation discovered at Cardinia extends over an area of approximately 1km by 5km on the western and eastern side of Cardinia. Cardinia contains a number of exciting development prospects, including Cardinia Hill, Helens, Bruno, Lewis, Fiona, Rangoon and East Lynne, which collectively contain in excess of 650koz of Mineral Resources.
Where sulphide ore has been drilled below the oxidation depth, common features of all the mineralised locations have been noted in geological logging and multi-element assays. These features include strong associations between gold mineralisation and pyrite, moderate levels of silver mineralisation and anomalous copper, lead, molybdenum, tellurium and zinc. These pathfinder minerals are also expected to report to flotation concentrates as they are associated with the sulphide style of mineralisation dominant at Cardinia.
Kin Mining Managing Director, Andrew Munckton, said: "The metallurgical testwork program undertaken on sulphide ore from key Cardinia deposits has delivered some very positive and important outcomes for the Cardinia Gold Project. Importantly, the testwork has confirmed that strong gold recoveries can be achieved with flotation, re-grindingand leaching of the sulphide ores. The improvement in recovery over the conventional grind, gravity and leach process is substantial, increasing recoveries by 6.3% at Cardinia Hill, 10.9% at Helens and up to 12.6% at Lewis. These results indicate that sulphide ores from Cardinia, if treated using the flotation and re-grindprocess, are likely to result in significantly improved gold production and financial returns.
"As our exploration programs advance, particularly across the Eastern Corridor, we are continuing to discover significant extensions of this large mineralised system - particularly deeper, higher grade sulphide ores. The process selected to treat these sulphide ores and the resulting metallurgical performance will therefore be increasingly important.
"Oxide ores that lie near surface and above the sulphide ores show uniform high rates of metallurgical recovery ranging from 90.5% to 95.5% using the conventional grind, gravity and leach process.
"With the release of recent drilling results from Rangoon, Cardinia Hill and Helens East where sulphide intersections at depth were significantly higher in grade, coupled with these strong metallurgical recovery results from Cardinia Hill and Helens - the Eastern Corridor is firming as a significant centre for development at the CGP. The Eastern Corridor is proving to be highly mineralised with numerous deposits and mineralised positions already identified. We see significant potential to discover new high-grade lodes, delineate new resources and grow our overall inventory across this corridor. Strong metallurgical performance from these deposits gives confidence that the Eastern Corridor and the Cardinia area more generally will continue to be a big focus for us moving forward."