An updated estimate increased indicated deep sulfide resources at Orion Minerals Ltd.'s flagship Prieska zinc-copper project in South Africa.
The project now hosts indicated resources of 18.5 million tonnes grading 3.6% zinc and 1.17% copper for 667,000 tonnes of zinc and 217,000 tonnes of copper.
A previous study in April outlined inferred resources of 5.2 million tonnes grading 4.9% zinc, 1.3% copper, 9.7 g/t of silver and 0.2 g/t of gold for 253,000 tonnes of zinc, 67,000 tonnes of copper, 1.6 million ounces of silver and 35,000 ounces of gold for the project's Vardocube prospect.
Total indicated and inferred resources now stand at 28.7 million tonnes grading 3.77% zinc and 1.16% copper for 1.1 million tonnes of zinc and 334,000 tonnes of copper.
The updated study included results from an additional 60,391 meters of drilling, which yielded 50 new intersections and validated 105 historical drillholes.
Orion said Dec. 18 that it is now anticipating the completion of detailed scheduling and mine design for the deep sulfide resource.
The company expects a mining permit to be granted in the second quarter of 2019, with the start of construction planned in the fourth quarter of 2019. Production is anticipated by 2021.