Gravity And Leach Test Work Confirm Excellent Total Gold Recoveries
Rox Resources Limited (ASX: RXL) has delivered high gold recoveries from initial gravity and cyanide leach recovery test work from the Grace discovery at Youanmi in the OYG JV area in Western Australia.
This metallurgical programme tested both oxide and fresh RC samples from the Grace deposit as a sighter program to aid in the design of a more comprehensive testing regime. Compared to gold mineralisation mined historically at Youanmi, gold at Grace is hosted in low-suphide gold mineralisation within fractured, altered granite.
As a result of 2020 drilling, granite-hosted gold has been intersected over a mineralised corridor extending 2.5km to the north of the mine area. The Grace deposit extends for +700m in the near mine area.
Managing Director, Alex Passmore, said test results were positive and confirmed excellent recoveries with total gold extraction of up to 99.8% using a combination of gravity and 24-hour cyanide leach bottle rolls. High gravity recoveries prior to cyanide leaching of up to 69% of total gold recovered were achieved through a Knelson Concentrator.
“I am pleased with these excellent initial metallurgical test work results from the Grace deposit,” Mr Passmore said.
“Particularly encouraging is the relatively high gravity recoverable gold from a coarse grind. Gold ores at Youanmi show a variety of metallurgical characteristics however what it is becoming evident that the granite- hosted, low sulphide mineralisation such as that at Grace are free milling (i.e. therefore amenable to conventional CIL).
