Mount Isa copper shines for Cooper Metals

Cooper Metals (ASX: CPM) is exploring for, and making discoveries of, copper deposits within the company’s Mount Isa East copper-gold project in Queensland.

The Mount Isa East copper–gold project covers some 1600 square kilometres, and is where Cooper Metals has identified several targets to combine with historical copper–gold workings and primed-for prospects.

The Mount Isa district has long been synonymous with successful copper discovery and production, but is also the major regional administrative, commercial and mining centre of the district – providing excellent access to infrastructure and potential third-party processing options for any future discoveries.

‘We have built a pipeline of targets through geophysical, geochemistry and mapping that we are systematically working through,’ Cooper Metals Managing Director Ian Warland told Future Mining.

‘We have generated over 50 targets that are a combination of historical workings and geophysical/geochemical targets, and have been investigating those with reverse circulation drilling in clusters of five to six targets at a time, as an initial scout‑drilling campaign.

‘This is what we did in October last year when we had success at a few prospects, the most successful being Brumby Ridge.’

Cooper Metals scored well in the encouraging drilling result stakes in 2023, with results from initial drilling at the project’s Brumby Ridge and Raven copper–gold prospects.

An intercept of 50 metres at 1.32 per cent copper from 80 metres, including two metres at 6.1 per cent copper and 0.23 grams per tonne gold, in hole 23MERC024 at the Brumby Ridge prospect was, at the time, the single strongest mineralised intercept drilled by the company in two years of activity.

Fast forward to late 2023, and Cooper Metals released assays from subsequent drilling that confirmed bonanza copper grades at Brumby Ridge from 23MERC028 – 71 metres at 2.8 per cent copper and 0.05 grams per tonne gold from 115 metres to the end of the hole at 186 metres. This included 24 metres at 5.4 per cent copper and 0.1 grams per tonne gold from 115 metres, with the hole ending in mineralisation of three metres at 1.88 per cent copper.

Further significant mineralisation was intersected at the Raven prospect from 23MERC019 – 15 metres at one per cent copper and 0.1 grams per tonne gold from 35 metres, within a wider intercept of 28 metres at 0.63 per cent copper and 0.061 grams per tonne gold from 34 metres.

This new intercept built on one previously reported at Raven’s 23MERC018 of 10 metres at 1.27 per cent copper and 0.17 grams per tonne gold from 77 metres, and three metres at 1.46 per cent copper and 0.15 grams per tonne gold from 100 metres – both within a wider intercept of 44 metres at 0.48 per cent copper and 0.055 grams per tonne gold from 59 metres.

‘We think this could be the start of a significant discovery at Brumby Ridge for Cooper Metals,’ Warland says.

‘Of five drillholes to date, three have hit significant mineralisation, and finished in mineralisation.

‘We are trialling DHEM at Brumby Ridge and Raven, and have plans for a larger program of reverse circulation and diamond drilling at Brumby Ridge in 2024.’ 

Related Articles

Shifting sands

Shifting sands

By Anthony Fensom Australia’s silica sand mining industry is on a growth trajectory, with a takeover bid and a raft of new projects sparking...

read more

Be the first to find out when the next edition is released

* indicates required