West Cobar Metals (ASX:WC1) confirms antimony grade uplift at Bulla Park

West Cobar Metals has reported re analyses of drill core from the Bulla Park Copper–Antimony–Silver Deposit, with peroxide fusion digest returning higher antimony grades compared to conventional acid digest methods across key mineralised intervals.

Highlights

• Antimony interval grades increased by up to +68.0% following peroxide fusion re analyses
• Average +14.2% Sb uplift across key mineralised intersections
• Mineral Resource of 20Mt @ 0.58% CuEq including 0.10% Sb
• Deposit remains open along strike and at depth
• Landholding of approximately 1,090 km² and approximately 120km strike

The re analysis program included drillholes 19CA002, BPD08 and BPD09 at the Bulla Park deposit, with peroxide fusion digest returning an overall increase of +14.2% in antimony grades and a maximum increase of +68.0% within mineralised intervals.

The announcement states that, for this style of mineralisation, acid digest methods may under represent antimony grades relative to peroxide fusion digest techniques.

The company states that the results indicate historic assays have materially under reported Sb.

Bulla Park is located approximately 110km west of the Cobar mining centre and lies beneath 60m to 120m of barren Mulga Downs Formation and/or unmineralised gently dipping Winduck Group sediments, with the deposit located near the top of the Winduck / Upper Amphitheatre Group.

The deposit contains an Inferred Mineral Resource of 20Mt @ 0.58% CuEq, including 0.30% Cu, 0.10% Sb and 4.7 g/t Ag at a 0.21% Cu cut off, with the announcement stating that the antimony uplift is not yet incorporated into the Mineral Resource.

Metallurgical testwork has demonstrated the ability to produce a copper silver concentrate and a separate antimony sulphide product.

Recoveries achieved to date include Cu 94.6%, Sb 82.6% and Ag 84.1%, with the announcement stating that these results support the potential for commercial recovery of all key metals.

West Cobar Managing Director Matt Szwedzicki said,

“The confirmation that antimony has been consistently under-reported strengthens our confidence in the scale and economic potential of the deposit.”

The announcement states that next steps include targeted drilling, incorporation of updated Sb grades into a Mineral Resource update, and ongoing metallurgical optimisation.

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