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Penasquito Polymetallic Mine, Zacatecas

Producer of

Gold, silver, lead and zinc


About 27km west of Concepción del Oro, Zacatecas State, Mexico

Geology Type

Sequence of carbonaceous, calcareous turbidic siltstones and interbedded sandstones

Mineral Type

Oxides and sulphides


15.69Moz Au, 911.8Moz Ag, 2.63Mt Pb and 6.3Mt Zn



Mining Method

Open pit

Processing Method

Oxide – heap leaching, zinc precipitation, pressure filtering then smelting; sulphide – conventional crushing, milling and flotation


About 1,000

Open Pit

Bucyrus Erie 495HR electric shovels, Komatsu WA1200 loaders, Atlas Copco PV351 diesel drills, and Komatsu 930E Series IV haul trucks

Processing Plant

Metso variable-speed apron feeders (Hagglunds hydraulic drive units), Sandvik H8800 crushers, Weir slurry pumps, Krebs GMax33 cyclone underflow, Dorr Oliver Eimco flotation and Wemco 250m³ rougher flotation machines, Metso 650HP

Vertimills, Dorr Oliver Eimco forced-air type cells, Outotec high-rate thickener

Engineering Contractor

M3 Engineering and Technology

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