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Galileo Mining announced on 28 October metallurgical results from Callisto at its wholly owned Norseman project in Western Australia. Conventional grinding and flotation tests achieved recoveries of up to 85% for palladium and 94% for copper. The results concern laboratory work on a specific core composite, rather than demonstrated recovery across the entire deposit.
ALS Metallurgy tested a bulk composite made from core collected over a continuous 12-metre interval between 147 and 159 metres in hole 26NRDD525. Seven flotation tests were performed: four at a P80 grind size of 98 microns and three at 75 microns. The peak recoveries came from tests using the coarser 98-micron grind.
Galileo said further work is needed on the relationship between grind size and recovery, because grinding requirements affect energy consumption. The current tests help investigate a processing route but do not establish full-scale plant performance, project economics or the recoverability of every mineralised domain.
Air-core work two kilometres north of the existing 17.5-million-tonne Callisto resource and along additional prospective strike has been completed, with assays expected in approximately six weeks. Reverse circulation drilling at Mission Sill is scheduled for early November to investigate sulphide-rich zones and follow up earlier platinum-group-metal anomalies. Those upcoming results remain separate from the completed Callisto metallurgical tests.