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Peru
La Zanja Mine

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 Location:
107 km E from Chiclauo, Peru

  Address:
Las Begonias 415, 19th Floor, San Isidro
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 TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...


Owners

Source: p. 56,99,194
CompanyInterestOwnership
Newmont Corp. 46.94 % Indirect
Compania de Minas Buenaventura S.A.A. 53.06 % Indirect
Minera La Zanja S.R.L (operator) 100 % Direct
Compañía de Minas Buenaventura S.A.A. held a 53.06% interest in Minera La Zanja, S.R.L., which operates La Zanja mining unit. The remaining 46.94% interest is held by Newmont.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal
  • Porphyry


Summary:

La Zanja is located within a large area of hydrothermal alteration, mainly related to epithermal gold deposits in high sulphidation environments, in addition to some bonanza Au vein epithermal systems, Cu-Au transitional epithermal-porphyry, and breccias pipe Cu-Au-Mo. There are two-ore deposits in production in oxide material: San Pedro Sur and Pampa Verde. Epithermal gold mineralization in oxides associated with dome edges in San Pedro and Pampa Verde deposits. Additionally, several low and intermediate-sulfidation vein systems have been recognized on the periphery, as well as copper/molybdenum/gold mineralization related to porphyry-type systems.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining is performed via open pit, for which there are currently two pits in exploitation: San Pedro Sur and Pampa Verde. The height of the operating benches is 6 m and 12 m for th final slope, with an angle ranging from 36° to 54°. Ore is transported directly to the San Pedro Sur leach pad, 3 km from the San Pedro Sur pit and 10 km from the Pampa Verde pit. The barren material is transported to deposits located near each open pit. The material is loaded using 3 m3 excavators, and hauled using trucks with a capacity of 20 m3. During 2021, the operation focused on the San Pedro Sur and Pampa Verde open pits. Reinterpretation geological exploration was also carried out in projects with resources and reserves. The operation is carried out with outsourced equipment, which includes loading equipment of 2.4–4.7 m3 and hauling equipment of 20-22 m3. The average material moved is 11.7 kilo tons per day.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required72127140
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Daily mining rate  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required1,577,645 t5,702,881 t10,694,942 t9,317,652 t
Daily processing capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 4,385,030 t Gold 0.35 g/t 49,617 oz
Proven 4,385,030 t Silver 3.33 g/t 470,071 oz
Probable 3,978,700 t Gold 0.32 g/t 41,348 oz
Probable 3,978,700 t Silver 3.47 g/t 444,491 oz
Proven & Probable 8,363,730 t Gold 0.34 g/t 90,964 oz
Proven & Probable 8,363,730 t Silver 3.4 g/t 914,562 oz
Measured 5,060,000 t Gold 0.4 g/t 64,375 oz
Measured 5,060,000 t Silver 11.1 g/t 1,805,917 oz
Indicated 2,179,000 t Gold 0.42 g/t 29,317 oz
Indicated 2,179,000 t Silver 9.05 g/t 634,221 oz
Measured & Indicated 7,239,000 t Gold 0.4 g/t 93,692 oz
Measured & Indicated 7,239,000 t Silver 10.48 g/t 2,440,138 oz
Inferred 1,271,000 t Gold 0.32 g/t 12,890 oz
Inferred 1,271,000 t Silver 5.64 g/t 230,475 oz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 11.2 / oz   10.7 / oz   8.01 / oz  
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 891 / oz   789 / oz   607 / oz  
Subscription required - Subscription is required.

Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 13.2   17.3   15  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 96.6   165.3   178.9  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -11.8   -18.4   25.6  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -7.5   12.1   28.9  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -12.3   -19.6   23.1  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -13.5   -12.8   4.9  
Subscription required - Subscription is required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2022
Subscription required - Subscription is required.

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
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Form 10-K 2018
Form 20-F 2018
Press Release 2018
Quarterly Report 2018
Annual Report 2017
Form 20-F 2017
Annual Report 2016
Form 20-F 2016
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