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Nimy Resources confirms extended copper-nickel mineralisation at Masson prospect

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By Imelda Cotton - 
Nimy Resources ASX NIM Mons Masson EM anomaly
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Emerging explorer Nimy Resources (ASX: NIM) has completed downhole electromagnetic (DHEM) and fixed loop electromagnetic (FLEM) surveys to confirm the depth extension of a polymetallic anomaly at the Masson copper-nickel prospect within its Mons project in Western Australia.

Previous drilling has shown that the anomaly carries significant copper, nickel, cobalt and platinum group elements (PGE) mineralisation.

Target size increased

Executive director Luke Hampson said the three surveys had delivered a significant target size increase to the Masson anomaly.

“The implication now is that the drilled shoot of massive copper-nickel sulphide at Masson will extend at depth,” he said.

“The higher conductivity of the modelled plates at a 10,000 siemens count represents a 2,000 siemens increase and could lead to increased mineralisation at depth.”

“Given the early discovery success, more of the anomalies in the northern portion of Mons will be prioritised for drilling.”

“The results continue to indicate that the new greenstone belt covered by our tenements is fertile for intrusion-related base-metal sulphides.”

Anomaly extended

Nimy engaged Gap Geophysics to complete the surveys, which extended the anomaly to a total depth of 225 metres.

It remains open with four large conductor plates that have been subject to preliminary modelling.

The conductor plates are believed to extend 69m below previously reported conductor plates and 38m below the massive, semi-massive and disseminated sulphide mineralisation in one of the drill holes.

DHEM and FLEM surveys are also being conducted at the Block 3 and Vera’s Gossan prospects within Mons.

Masson discovery

The Masson prospect was first discovered during EM surveys and drilling in 2023.

The discovery hole was reported in October with the best assays of 10m from 98m at 0.42% nickel, 0.39% copper, 0.04% cobalt and 0.32 grams per tonne PGE (palladium and platinum) including 5m at 0.73% nickel, 0.53% copper, 0.06% cobalt and 0.55g/t PGE from 102m.

Drilling since then has returned downhole sulphide-rich intercepts up to 45m thick including mineralised massive sulphide intercepts with peak values of 1.49% copper, 0.97% nickel, 0.17% cobalt and 0.73g/t PGE.