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Peru
Vinchos Mine (Cerro de Pasco Operation)

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 Location:
194 km NE from Lima, Peru

  Regional Office:
Av. Santo Toribio No. 115, Of. 702 San Isidro
Lima
Peru
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Fax+511-712-3729
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  • Overview
  • Owners
  • Geology
  • Processing
  • Production
  • Reserves
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
Processing
  • Flotation
During 2018, no mineral was produced from the Vinchos mine. This mine is in a process of temporary suspension of operations.

On December 29, 2014 the Company requested the temporary suspension of operations at Vinchos; this request was approved by the Ministry of Energy and Mines in January 2015.


Owners

 
CompanyInterestOwnership
Cerro de Pasco Resources Inc. 100 % Direct

Deposit Type

  • Carbonate hosted


Summary:

The historic Cerro de Pasco deposit, located on the Andean Plateau in Central Peru, is one of the largest polymetallic resources in the world. Carbonate-hosted Zn-Pb-(Bi-Ag) ores presently being mined from the eastern part of the open pit contain Fe-poor sphalerite and display argillic to advanced argillic alteration, including aluminumphosphate-sulfate (APS) minerals.

The oldest exposed rocks in the Cerro de Pasco district are slightly metamorphosed Devonian shales and sandstones of the Excelsior Group. They are overlain by Permo-Triassic red beds (sandstones and conglomerates) of the Mitú Group. Over the half eastern part of the district, the Mitú Group is covered by a several hundred meter-thick Upper Triassic-Lower Jurassic carbonate sequence belonging to the Pucará Group.

The earliest stage formed an extensive replacement body of quartzpyrite on the eastern margin of the vent. Only minor sphalerite was deposited during this stage. Probably as part of the quartz-pyrite stage, pyrrhotite replaced the central portions of the pyrite-quartz body in steep, pipe-like zones, grading out to ore consisting of Fe-rich sphalerite and galena. E W enargite-pyrite veins in the western area truncate this early mineralization stage.

Our working hypothesis is that sphalerite-3 orebodies, largely associated with advanced argillic alteration (characterized by an assemblage of kaolinite, quartz, dickite, hinsdalite, svanbergite) and the E-W trending high-sulfidation enargite-bearing veins that cut the silica-pyrite body were formed during the same stage. Alunite occurring within silica-pyrite bodies in the western face of the open pit nearby enargite veins also belong to this stage.


Mining Methods


Summary:


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

In 2015, 94% of the mineral extracted at the Chungar unit was processed at the Animón plant, while 6% was processed at the San Expedito plant, part of the Cerro de Pasco unit.

During 2014 the Company continued using crushing, milling and filtration circuits at the Paragsha plant to increase the treatment capacity of the San Expedito plant. In addition, recovery improved after installation of a flash SK-240 cell and an automatic lime dosing control system, as well as greater flotation time in the lead-zinc circuits with large cells transferred from the Paragsha plant. However metallurgical testing was continued in order to improve recovery and zinc grade, given the higher copper head grade of the ore.


Combined production numbers are reported under Cerro de Pasco Operation

Operational Metrics:

Metrics201520142013
Tonnes processed 0.2 kt of ore90 kt of ore161 kt of ore

Reserves at December 31, 2017:

CategoryTonnage CommodityGrade
Measured & Indicated 569 kt Zinc 2.1 %
Measured & Indicated 569 kt Lead 2.39 %
Measured & Indicated 569 kt Copper 0.16 %
Measured & Indicated 569 kt Silver 7.43 oz/t
Inferred 173 kt Zinc 4.5 %
Inferred 173 kt Lead 4 %
Inferred 173 kt Copper 0.11 %
Inferred 173 kt Silver 8.4 oz/t


Heavy Mobile Equipment:

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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2018
Annual Report 2017
Annual Report 2015
Annual Report 2014
Annual Report 2013
Other 2002
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Aerial view:

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