Diversified miner South32 has reported a Joint Ore Reserves Committee compliant resource of 55-million tonnes, grading 2.31% zinc, 9.08% manganese and 78 g/t silver for the Clark deposit, at its Hermosa project, in Arizona.
Some 33-million tonnes of the resource is classified as indicated with a further 22-million tonnes classified as inferred.The declaration of a mineral resource estimate for the Clark deposit marks another milestone for the Hermosa project, following the initial mineral resource estimate for the Taylor deposit in June 2019. A prefeasibility study for the development of the Taylor deposit is due for completion in September, while a scoping study to advance the understanding of the processing and end-market opportunities for the Clark deposit is also under way.