Pierina Gold-Silver Mine

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The Pierina mine is located in the Andean Cordillera in the Department of Ancash in north-central Peru, approximately 10 kilometres northwest of the city of Huaraz, at an altitude of approximately 4,100 metres.

Pierina is an open-pit, truck-and-loader operation. Ore is crushed and transported through an overland conveyor to the leach pad area. Run-of-mine ore is trucked directly to a classic valley-fill type of leach pad. Pierina is a high sulphidation (acid sulphate) epithermal gold-silver deposit in a host of Tertiary pyroclastics.The open pit, valley-fill, heap leach operation is located at long. 77º35'W, lat. 9º26'S in the Cordillera Negra of north-central Peru. The main ore host is a core zone of residual vuggy silica with alunite, it is surrounded by a zone of alunite with minor pyrophyllite and dickite, and finally an outer zone of kaolinitic to illitic clay. At year-end 2002, proven and probable reserves at Pierina stood at 3.6 Moz of gold. Since production began in November 1998, the mine has produced over 3.5 Moz of gold at an average cash cost of US$51/oz.

Pierina produced 97,000 ounces of gold in 2013 at all-in sustaining costs of $1,349 per ounce1. As part of Barrick’s increase focus on disciplined capital allocation, the company has initiated closure activities at Pierina as of August 2013.

Reference for information:
www.barrick.com/GlobalOperations/SouthAmerica/Pierina/d...