PolarX Ltd (ASX:PXX) has hit visible copper and gold mineralisation around 100 metres below the nearest other drill hole at its Zackly prospect in Alaska.
The mineralisation is hosted within sub-vertical skarn alteration from 260.15 metres to 332.08 metres and visible gold was observed in four separate locations.
The skarn alteration and associated mineralisation at Zackly occurs in silty limestones and locally in andesitic-basalt volcanic rocks and dioritic intrusive rocks.
Steeply dipping faults appear to have produced repetitions of the rock sequence, including the mineralisation, which has potentially widened the mineralised zone down-dip.
READ: PolarX intersects visible copper and gold mineralisation at Alaska Range project
Previous results from the drilling program also intersected visible copper oxides 850 metres along strike from the resource, which remains open along strike in both directions and at depth.
The program comprises up to 25 holes for a total of around 5,000 metres of core drilling, designed to extend the Zackly resource along-strike and down-dip.
Six holes for around 1,042 metres have been completed and two are in progress.
Approaching economic scale
Along with Zackly, the Alaska Range project also includes the Caribou Dome deposit, which has a resource of 2.8 million tonnes at 3.1% copper for 85,500 tonnes of copper metal.
PolarX aims to delineate a sufficient high-grade copper-gold resource inventory between Zackly and Caribou Dome to underpin feasibility studies on combined or standalone operations.
Early soil sampling demonstrates almost the entire 35-kilometre belt within the project is mineralised with copper, gold and silver in various geological forms.
READ: PolarX about to start copper gold resource expansion drilling
The company also aims to test the strong potential at Zackly for a deeper and much larger buried porphyry source.
It believes a porphyry may be the source of the prominent magnetic anomaly.