Scoping study advises restart of Mt Holland - Convergent
PERTH (miningweekly.com) – A scoping study at junior Convergent Minerals’ Mount Holland gold mine, in Western Australia, has proven that restarting the operation could be profitable.
A two-stage ore treatment process, using flotation and cyanide leaching, has been flagged as the lowest-cost option for the project, with a capital estimate of some A$16-million.
A carbon-in-pulp circuit could be added at a later time, and would enable Convergent to mine and treat oxide resources at each of the pits within the company’s mining leases.
The scoping study demonstrated that by keeping throughput at 300 000 t/y, an underground operation with an initial two-and-a-half year mine life provided opportunity for Convergent to start production, and to build the operation gradually.
Ore would initially be sourced from the Blue Vein deposit.
“Forming a sulphide and gold concentrate prior to a high-intensity cyanide leach results in a low capital cost, and recent tests have proven that our gold recoveries remain very high using this method,” said Convergent CEO David Price.
He noted that a flotation and high-intensity leach circuit did not rely on large throughputs, and once the circuit was built, Convergent could access more ore at each of its potential mine sites.
“With more gold likely to be encountered at deeper Blue Vein, we anticipate the life-of-mine to extend considerably and possibly beyond five years at Blue Vein alone,” Price said.
He added that while the mining and deeper exploration of Blue Vein was under way, the company would also drill and develop the Bush Pig, Earl Grey, Darjeeling and other mines within the gold fields.
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