Barrick put the open pit mine on care and maintenance in 2019, but production continued from the heap leach. Boroo expects to recover approximately 100,000 oz. of gold inventory by 2023. Since 2005, Lagunas Norte produced over 10 million oz. of gold.
Boroo says Lagunas Norte represents a transformative opportunity as the company’s goal is to become a mid-tier producer in the near term. The company plans to initiate the next phase of the project to recover carbonaceous oxide ore. It is planning to add screening, milling and a carbon-in-leach circuit to treat 17 million tonnes of stockpiled measured and indicated material grading 2.4 g/t gold containing 1.2 million oz.
The new owner also has longer term plans to mine the high sulphur refractory ore below the oxide zone. There are 25 million tonnes of sulphide material grading 2.9 g/t gold and containing 2.4 million oz. (Boroo did not specify whether these figures are 43-101 compliant.)
Additional development at the mine is supported by Barrick’s 2018 feasibility study for Lagunas Norte.
(This article first appeared in the Canadian Mining Journal)