THE DRILL SERGEANT: Azure Minerals (ASX: AZS) has encountered additional high-grade gold and cobalt mineralisation during follow-up diamond drilling on the company’s 100 per cent-owned Sara Alicia project, located in Sonora State, Mexico.
Azure Minerals completed the Stage 2 drilling campaign, comprising 13 holes for 1126.9 metres, which had been designed to test for extensions to the high-grade gold and cobalt mineralisation identified by the company’s 2017 maiden drilling program.
This earlier program intersected up to 26.2m at 9.5g/t gold and 1.26 per cent cobalt.
Mineralised drill intersections from the current program include:
3.75 metres at 8.08 grams per tonne gold from 11.8m;
5.9m at 5.5g/t gold from 40.9m;
3.65m at 8.41g/t gold from 0.0m and 19.6m at 8.65g/t gold from 10.65m; and
8.8m at 6.2g/t gold from 6.1m.
3.65m at 1.191 per cent cobalt from 0.0m and 24.95m at 0.312 per cent cobalt from 9.15m;
9.5m at 0.481 per cent cobalt from 3.8m; and
16.2m at 0.326 per cent cobalt from 9.15m.
Azure Minerals explained that hole DSA-14 unexpectedly drilled into a mining void, indicating the old mine workings may be more extensive than recorded in the historical data.
The DSA-14 intersection of 19.6m at 8.65g/t gold included a 1.9m mining void from 22.75m to 24.65m downhole.
Drill core samples taken from immediately above and below the void returned high-grade mineralisation of 19.95g/t gold and 0.907 per cent cobalt and 19g/t gold and 1.065 per cent respectively, which the company interpreted to suggest that higher grade material may have been exploited by historical miners.
“The high-grade cobalt mineralisation is hosted within a shoot of massive and semi-massive sulphides that outcrops near the top of the Sara Alicia hill and plunges at a shallow angle towards the northwest,” Azure Minerals said in its ASX announcement.
“This sulphide-rich shoot also contains high-grade gold mineralisation, while drilling has confirmed that gold is widespread in the rocks of the surrounding skarn system.
“The massive and semi-massive sulphides forming the mineralised shoot provide the company with the opportunity to explore for extensions of the gold and cobalt mineralisation by utilising geophysical techniques.
“Azure is planning an Induced Polarisation (IP) survey to trace the subsurface dimensions and orientations of the mineralised zone.”