Zinc, Lead, Silver and Gold 


Open Pit and Underground Mine

Plant Capacity

4.3 ktpd


83.48% (1)



¹The ownership percentage is attributable to Nexa Resources.


Atacocha is a polymetallic underground and open pit polymetallic mine, wholly owned by Nexa Resources Atacocha S.A.A. (formerly Compañía Minera Atacocha), located in the district of San Francisco de Asís de Yarusyacán, in the province of Pasco, Peru.


Operations began in 1938 and, in 2021, the Atacocha mine produced approximately 8.5 thousand tonnes of zinc contained in concentrates, 8.7 thousand tonnes of lead contained in concentrates, 1,026.8 thousand ounces of silver contained in concentrates and 11.9 thousand ounces of gold contained in concentrates. The ore is treated at a concentrate plant that has a processing capacity of 4.3 thousand tonnes of ore per day. In 2020, in response to COVID-19 and the uncertain macroeconomic scenario and our efforts to reduce costs and improve operational efficiency, we decided to not resume the higher-cost Atacocha underground mine after the mandatory temporary suspension of our operations in Peru and placed it under care and maintenance, which it remains to date.


  2021 2020 2019
Treated ore kt 1,271 1,065 1,505
Zinc % 0.88 1.20 1.43
Copper % 0.05 0.08
Lead % 0.82 1.15 1.30
Silver oz/t 1.01 1.39 1.52
Gold oz/t 0.01 0.01 0.01
Production | metal contained
Zinc kt 8.5 9.6 16.7
Copper kt 0.0 0.0 0.0
Lead kt 8.7 10.2 16.5
Silver MMoz 1.0 1.2 1.9
Gold oz 11.9 6.3 9.3
Cash Cost, net of by-product credits US$/t (557.7) 17.8 1,052.0
Cash Cost, net of by-product credits US$/lb (0.25) 0.01 0.48
CAPEX US$ mm  11.6 15.3 11.8
Geology and Exploration

In 2021, we completed approximately 13.3 km of diamond drilling, divided between exploratory (3.1 km) and infill (10.2 km) drilling. The 2021 exploration program at Atacocha was focused on increasing mineral near of San Gerardo open pit in two targets: Extension NW and Ayarragram based on the surface drilling program. The drilling program identified zinc, lead, copper, silver, and gold mineralization, which is open for expansion.

The exploration drilling works focused mainly on extending existing mineralized bodies along strike at the San Gerardo pit and testing the potential extension at the surface of know orebodies at the Atacocha underground mine including the Ayarragram orebody.