Impact Minerals Encounters High-Grade Nickel-Copper-PGE at Plat Central

THE DRILL SERGEANT: Impact Minerals (ASX: IPT) reported high-grade assays for platinum group elements (PGE) with associated high-grades of nickel and copper at the Plat Central prospect within the company’s Broken Hill project in New South Wales.

Impact Minerals declared the assays to have confirmed – and are in line with – expectations it had following measurements made with a hand-held XRF instrument of nickel, copper and Impact’s proprietary geochemical ratio which has been shown to have a positive correlation with PGE grades.

Results include:

1 metre at 22.7 grams per tonne 7PGE, 3.3 per cent nickel, 1 per cent copper, 23g/t silver and 755g/t cobalt.

The 7PGE grade comprises: 10.9g/t palladium, 7.3g/t platinum, 0.9g/t rhodium, 1.3g/t osmium, 1.4g/t iridium and 0.6g/t ruthenium and 0.1g/t gold.

7m at 3.8g/t 7PGE, 0.6 per cent copper, 0.5 per cent nickel, 9.4g/t silver and 167g/t cobalt down hole, including 1m at 6.3g/t 7PGE, 1.2 per cent copper, 0.8 per cent nickel, 19g/t silver and 229g/t cobalt.

The 7PGE grade for the 1 metre intercept comprises: 3.6g/t palladium, 1.8g/t platinum, 0.1g/t rhodium, 0.2g/t iridium, 0.2g/t osmium and 0.1g/t ruthenium and 0.3g/t gold.

3m at 3.3g/t 3PGE, 0.6 per cent copper and 0.4 per cent nickel from 52m down hole, including 1m at 4.7 g/t 3PGE, 0.9 per cent copper, 0.4 per cent nickel from 52m.

The 3PGE grade for the 1m intercept comprises: 3g/t palladium, 1.4g/t platinum and 0.3g/t gold.

“The strong lateral zonation evident in the mineralisation at Plat Central is characteristic of a process called ‘sulphide fractionation’, which is well understood in magmatic nickel-copper-PGE systems,” Impact Mineals said in its ASX announcement.

“The process results in a distribution of metals that is reasonably predictable: proximal nickel-dominant mineralisation passes into copper-dominant mineralisation and then more distal PGM-dominant mineralisation.

“This may occur over many scales varying from metres to kilometres.”