Oxidos de Pasco unit has reserves of oxidized ore with silver and gold contents, accumulated in stockpiles and in-situ mineral located at the edge of the south of the Raúl Rojas pit.

The extraction of in situ mineral, located in the southern section of Raúl Rojas open pit, has a low stripping ratio and its extraction does not present any operational problems.

(Translated from Spanish by Google Translate)
The plant processes Cerro stockpiles with silver and gold content as well as in-situ oxides located at the edge of the south of the Raúl Rojas pit.

Construction of the oxide plant began in July 2012. The first lixiviation plant in Peru, it has a capacity of 2,500 tpd. The plant is designed for a future expansion to 4,000 tpd and is certified by the International Cyanide Management Institute.

In 2015, the oxides plant started operating at 1,150 tpd and gradually reached levels of 2,500 tpd by the month of June. During 2015, 743,000 tons of stockpiled oxides were processed, having ore grades of 0.30 g Au/MT and 11.02 oz Ag/MT.

An update of the reserves and resources of oxides was carried out in situ, for the design of its exploitation, south of the Raúl Rojas pit.

In 2018, operations began with the recovery in the southern part of in situ oxides that will feed mineral to the oxide plant in the ........