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Peru
Cerro de Pasco Operation

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 Location:
174 km NE from Lima, Peru

  Regional Office:
Av. Manuel Olguín 375, Santiago de Surco
Lima
Peru
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeStockpile
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life17 years (as of Jan 1, 2020)
Cerro de Pasco consists of Paragsha underground mine (suspended), Vinchos underground mine (closed), an open pit Raul Rojas mine and two concentration plants.


Owners

Source: p. 7,8,9
CompanyInterestOwnership
Glencore plc. 23.3 % Indirect
Empresa Administradora Cerro S.A.C. (operator) 100 % Direct
Volcan Compañía Minera S.A.A. is a subsidiary of Glencore AG, which is a subsidiary of Glencore Plc., a company domiciled in Switzerland, hereinafter the Parent, owner of 63% of common class A voting shares and an economic interest of 23.3%, excluding treasury shares.

Contractors

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Deposit Type

  • Carbonate replacement
  • Vein / narrow vein
  • Epithermal


Summary:

The Cerro de Pasco deposit is a complex epithermal polymetallic deposit with base and precious metal mineralization, mainly silver, characterized by vein, breccia-hosted, and carbonate-replacement mineralization. This deposit type has also been referred to as a “Cordilleran base- metal deposit” type (Baumgartner et al., 2008). The term “Cordilleran” was first applied to base metal-rich polymetallic vein deposits (Sawkins, 1972; Einaudi, 1982; Guilbert and Park, 1985; Bartos, 1987; Fontboté and Bendezú, 2009; Catchpole et al., 2015). Cordilleran deposits have also been referred to as Butte-type vein deposits (Meyer et al., 1968), polymetallic veins, and zoned base metal veins (Einaudi et al., 2003). Because the mineralization in many districts is dominantly mantos and not veins, and they commonly contain gold and silverin addition to base metals, Bendezú et al. (2008) and Fontboté and Bendezú (2009) prefer the more general term Cordilleran polymetallic deposits.

Rottier et al. (2018b) describe three successive mineralization stages at Cerro de Pasco resulting in epithermal low- to high-sulphidation mineral associations emplaced at a paleodepth from <500 m to 1,500 m in the shallow part of a porphyry system:

1) Pyrrhotite pipes grading outward to sphalerite and galena replacement bodies (Stage A).
2) Quartz-pyrite veins (Stage B1) and a funnel-shaped massive replacement body of pyrite-quartz (Stage B2) with quartz-sericite ± kaolinite alteration.


Mining Methods

  • Truck & Shovel / Loader


Summary:

(Translated from Spanish by Google Translate)
The Cerro de Pasco Unit consists of two underground mines (Vinchos, Paragsha) and an open pit (Raúl Rojas). In 2012-2014 the open pit and underground mining operations wound down and processing shifted towards the treatment of old stockpiles which continues today.

Vinchos Mine (beginning of Operation 1975).
Vinchos mine is in under closure process since 2016.

Paragsha underground mine (beginning of Operation 1902).
The Paragsha mine has been temporary suspended since 2016. The infrastructure for the pumping system remains operational and in good condition.

In 2015, ore production came from mine sectors having higher ore grades and a greater volume of reserves. Due to the characteristics of the terrain, conventional semi-mechanized mining techniques were employed, including wood bracing and shoring as well as cemented hydraulic backfill.

Raúl Rojas open pit mine (beginning of Operation 1956).
The Raul Rojas mine has been temporary suspended since December 2015.

Since 2016, processing of marginal ore from the stockpiles mined at the Raul Rojas open pit in previous years begins.

Marginal ore stockpiled from the Raúl Rojas open pit mine is treated at the Paragsha-San Expedito.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits202120202019201820172016
Zinc Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required119.32.3
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required26226
Lead Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate M oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,073 kt1,314 kt1,059 kt233 kt
Tonnes processed  ......  Subscription required  ......  Subscription required2,073 kt1,314 kt1,059 kt233 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required6,000 t
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Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Probable 2.8 Mt Zinc 1.5 % 42 kt
Probable 2.8 Mt Lead 0.6 % 17 kt
Probable 2.8 Mt Silver 2.1 oz/t 6 M oz
Total Resource 87.8 Mt Zinc 2.8 % 2,447 kt
Total Resource 87.8 Mt Lead 1 % 908 kt
Total Resource 87.8 Mt Copper 0.1 %
Total Resource 87.8 Mt Silver 1.9 oz/t 167 M oz

Operating Costs:

Units2021202020192018201720162015
Combined mining costs ($/t milled) USD 42.7
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 8.9   14   0.1  
Revenue M USD  ......  Subscription required 29  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 8, 2022
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
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Annual Report 2018
Management Discussion & Analysis 2018
Technical Report 2018
Annual Report 2017
Corporate Presentation 2017
Management Discussion & Analysis 2017
Annual Report 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Annual Report 2015
Management Discussion & Analysis 2015
Other 2015
Annual Report 2014
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