Heap Leach Plant
(Merrill Crowe and Carbon-in-Column)
Lagunas Norte is a traditional open-pit truck-shovel heap leach operation located in the District of Quiruvilca in the Province of Santiago de Chuco and the Department of La Libertad, in northern Peru. The mine site is located 141 km east of the coastal city of Trujillo.
Operations include open pit mining of gold-silver ore, crushing, and extraction of precious metals using heap leaching, Merrill Crowe, and carbon-in-column (CIC) recovery. The mine has been in continuous production since March 2005 and up until June 2021, the mine was operated by Barrick Gold Corporation, and has produced over 10 Moz of gold.
The Technical Report dated December 1, 2021 is completed by SLR International Corporation and provides further information on the Lagunas Norte development projects' Mineral Resource and Mineral Reserve estimates, expected grades and recoveries, development plans, mining methods, and metrics including strip ratio, recovery process, and production expectations including expected cash flows, capital cost estimates and expected life-of-mine operating costs.
The updated Measured and Indicated Mineral Resource has been estimated at 25.6 Mt grading 0.80 g/t Au and 2.65 g/t Ag, containing 663 koz of gold and 2.1 Moz silver. The Proven and Probable Mineral Reserves including existing stockpiles scheduled for processing, total 49.4 Mt at a grade of 2.49 g/t Au and 6.24 g/t Ag, containing 4.0 Moz of gold and 9.9 Moz of silver.
Base Case (Secondary Leaching + CMOP + PMR)
SLR also did a sensitivity analysis of a case without the PMR expansion.
Alternative Case (Secondary Leaching + CMOP)