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Great Boulder Resources to drill copper nickel cobalt sulphide targets

Aircore drilling and EM survey data has produced promising results.

Stefan Murray, managing director, Great Boulder Resources
Stefan Murray, managing director, Great Boulder Resources

Great Boulder Resources (ASX:GBR) has identified a number of high-strength electromagnetic conductors at its Mt Venn copper-nickel-cobalt prospect within its Yamarna Project in Western Australia.

The conductors are a result of the 7.5-kilometre ground electromagnetic (EM) survey over the Mt Venn intrusion.

Shallow aircore drilling in the EM survey area has identified signs of copper-nickel-cobalt mineralisation, which bodes well for upcoming deeper drilling.

Great Boulder is now mobilising a reverse circulation (RC) drill crew to Mt Venn next week for a 3,000+ metre drill program.

Stefan Murray, managing director, commented

“The EM survey confirmed very strong conductors in the northern survey area. These conductors are relatively shallow and the aircore geochem has defined a strong and coherent copper-nickel-cobalt trend associated with the peak EM response.

“To the south, the early-time response is masked by the paleochannel, similar to the previously reported airborne XTEM survey.

“However, the more powerful moving loop EM was able to penetrate the paleochannel and identify late-time responses at depth.

“EM plate modelling has been completed by consultants Newexco with more than 30 plates defined.

“Drill hole plans are being finalised to test each plate and an additional copper-zinc-lead-silver anomaly located north of the EM survey that was detected in the aircore drilling.”

Upcoming drilling program

Reverse circulation drill hole planning is currently being finalised to target conductor plates, prioritising coincident copper-nickel mineralisation.

There is circa 9 kilometres of strike to test which will initially be done by scout RC drilling to test the copper and nickel content in the sulphide body.

This information can then be fed back into the EM plate modelling to better constrain the plates for follow-up drilling.

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