THE DRILL SERGEANT: Musgrave Minerals (ASX: MGV) completed initial metallurgical test work on the Starlight gold lode at Break of Day, on the company’s wholly-owned ground at the Cue project in the Murchison region of Western Australia.
Musgrave Minerals described the results as being “exceptional” with testwork highlighting gravity and cyanide leach recoveries averaging 98 to 99 per cent across the different domains (oxide, transitional and fresh).
The testwork also highlighted the amenability to conventional gravity and leaching techniques using standard reagents.
Metallurgical recovery tests were completed on the four samples (oxide, transitional and 2 x fresh composites) at various grind sizes across the strike and depth extent of the Starlight lode.
The gravity recoverable component was initially concentrated using a conventional laboratory scale bench top Knelson concentrator, followed by amalgamation and intensive cyanide leaching of the concentrate.
A conventional 48hr cyanide leach was then carried out on reground (P80 75µm) residual material from the Knelson concentrator with readings taken periodically to determine leach kinetics of the samples.
The test work demonstrated very rapid leaching kinetics for all four samples and overall recovery of between 98.8 per cent and 99.5 per cent over short leach times.
“This is a fantastic result at Starlight – Break of Day,” Musgrave Minerals managing director Rob Waugh said in the company’s announcement to the Australian Securities Exchange.
“The very high total gold recovery and high gravity-only component recovery ensures that conventional processing options can be applied in any development scenario and also means the mineralisation is suitable for treatment through several of the nearby processing facilities currently in operation.”
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