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Peru
Marcapunta Mine (Colquijirca (El Brocal) Operation)

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 Location:
159 km NE from Lima, Peru

  Regional Office:
Av. Javier Prado Oeste #2173, San Isidro
Lima
Peru
Phone  ...  Subscription required
Fax51-1-2645373
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
  • Copper
Mining Method
  • Sub-level stoping
Processing
  • Flotation


Owners

Source: p. 60
CompanyInterestOwnership
Compania de Minas Buenaventura S.A.A. 61.43 % Indirect
The Colquijirca (also known as Tajo Norte) and Marcapunta Norte mines are wholly-owned by El Brocal. Compania de Minas Buenaventura S.A.A aggregate direct and indirect equity interest in El Brocal was 61.43% at December 31, 2018.

Deposit Type

  • Vein / narrow vein


Summary:

At Marcapunta Norte, mineralization is stratiform, in both the mineralized blankets emplaced in the limestone of the Calera Medio Formation, and in the mineralized breccia located in the unit below said formation. The vein of ore consists of a massive replacement of sulfides and the filling of open spaces, for which reason it has been classified as a cordillera deposit tied to the Marcapunta volcanic complex. Mineralization consists of a vein of arsenical copper (enargite) with Ag-Au values, with gangues of pyrite, quartz, and alunite.


Mining Methods

  • Sub-level stoping


Summary:

Marcapunta is an underground operation that exploits arsenical copper ore.

The Marcapunta mining method involves long drills, by sub-levels.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

The ore from Marcapunta is treated in Plant 1, which uses the selective flotation process to achieve the concentration of the economic Cu mineralization. The concentrating plant is located in the Community of Huaraucaca, and includes the crushing, sorting, milling, conditioning, flotation, and filtering processes, as well as the respective tailings storage yards. Given the equipment characteristics and layout, the plant has the ability to beneficiate the copper ore from the Marcapunta Norte Mine. It has direct access to a railway, which is used to transport the concentrates to the port of El Callao.

Treatment capacity: The El Brocal processing plant has a total capacity of 20,000 MTD, which is shared by the ore from Marcapunta and Tajo Norte.

Recoveries & Grades:

CommodityParameter20192018201720162015
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, oz/t 0.770.710.660.590.75
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.540.510.560.530.31
Copper Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Head Grade, % 1.671.591.912.071.92
Subscription required - Subscription is required.

Production:

CommodityUnits20192018201720162015
Silver oz  ......  Subscription required  ......  Subscription required1,052,453799,497858,109
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20192018201720162015
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2,597,926 t1,962,627 t
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 34,503 kt Silver 0.023 oz/t 805 koz
Proven & Probable 34,503 kt Gold 1.15 oz/t 39,799 koz
Proven & Probable 34,503 kt Copper 1.3 % 450 kt
Total Resource 54,440 kt Silver 0.019 oz/t 1,535 koz
Total Resource 53,439 kt Gold 2.24 g/t koz
Total Resource 53,439 kt Copper 1.26 % 672 kt


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 18, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Form 20-F 2017
Annual Report 2016
Form 20-F 2016
Subscription required - Subscription is required.

Aerial view:

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