Cooper Metals has announced the assay results from the Brumby Ridge and Raven Prospects at its Mt Isa East copper-gold project.  

A standout mineralised intersection was returned from initial scout drilling at the Brumby Ridge Prospect in early October. 

Drilling in the vicinity of historical workings intersected 50m at 1.32 per cent copper (Cu) and 0.05g/t gold (Au) from 80m in a highly brecciated mafic volcanic rock including 2m at 6.1 per cent Cu and 0.23 g/t Au.

Follow up drilling intercepted 72m at 1.5 per cent Cu from 113m in hole 23MERC028 as measured by portable XRF (pXRF) in the field and sulphides (pyrite and chalcopyrite) observed in the RC chips. 

This already long intercept was not fully tested as hole 23MERC028 finished in copper mineralisation (0.4 per cent pXRF Cu) due to lack of drill rods. 

Due to continuing delays in receiving laboratory assay results and the significance of the new drill intercept in 23MERC028, the company decided to release the pXRF results to the market as a prelude to receiving actual assay results. 

Each one metre sample is analysed in the field with a Niton XL5 portable XRF analyser by company personnel. Certified standards are analysed and checked regularly during drilling, with the Niton pXRF for comparison. 

Cooper Metals Managing Director, Ian Warland, said that the company is very pleased with the results of the initial scout drilling on five Cu-Au prospects. 

“The Brumby Ridge drill intercept is the single strongest mineralised intercept drilled by Cooper Metals in the last two years,” Mr Warland said. 

“Raven continues to expand with another great intercept into a home-grown conceptual target. 

“These two prospects are now the company’s main focus and are being followed up as we speak, as Cooper continues to test its pipeline of quality Cu-Au prospects in the region. 

“This cluster of prospects, including Mafic Sweats South, are only around 30km to the south east of Mt Isa, close to infrastructure and worthy of further priority investigation and exploration by Cooper.” 

Featured image: A sulphide-rich RC sample from hole 23MERC028. Image credit: Cooper Metals.


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