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Chile
Los Pelambres Mine

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 Location:
183 km NE from Valparaiso, Chile
  Regional Office:
Avenida Apoquindo 4001 Piso 18 Las Condes
Santiago
Chile
7550162
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2035
Los Pelambres is a sulphide deposit. It produces copper concentrate (containing gold and silver) and molybdenum concentrate.

The Los Pelambres Expansion project is divided into two phases with Phase 1 expected to be in production in H2 2023 and Phase 2 in 2026.

Phase 1 is designed to increase plant throughput. The expansion is divided into two sub-projects, the construction of a desalination plant and water pipeline from the coast to the El Mauro tailings storage facility, and the expansion of the concentrator plant.

Phase 2 includes the expansion of the desalination plant and the construction of a new water pipeline from the El Mauro tailings storage facility to the concentrator plant.
Latest NewsAntofagasta gears up for phased growth at both Los Pelambres and Centinela     August 10, 2023

Owners

Source: p. 213
CompanyInterestOwnership
Mitsubishi Corp. 5 % Indirect
Marubeni Corp. 9.21 % Indirect
Mitsubishi Materials Corp. 10 % Indirect
JX Metals Corp. 15.79 % Indirect
Antofagasta plc. 60 % Indirect
Minera Los Pelambres S.A. (operator) 100 % Direct
Ownership structure:
– 60% Antofagasta
– 9.21% Marubeni Corp.
– 15.79% JX Metals Corp. (formerly JX Nippon Mining & Metals Corp.)
- 10% Mitsubishi Materials Corp.
- 5% Mitsubishi Corp.

Minera Los Pelambres, a 60%-owned subsidiary incorporated in Chile.

Contractors

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Deposit Type

  • Porphyry

Summary:

The porphyry copper mineralization at Los Pelambres is contained in two contiguous deposits, Los Pelambres (Cu-Mo) and Frontera (Cu-Au), which together constitute the third largest copper concentration (~36 million metric tons (Mt) Cu) in the Miocene to early Pliocene belt of central Chile. Los Pelambres is centered on a composite, N-oriented, ~4.5- × 2.5-km precursor quartz diorite stock emplaced within the regional, NNW-striking, E-vergent Los Pelambres reverse fault.

The fault places intensely deformed Late Cretaceous volcanic and late Oligocene to early Miocene volcanic and volcanosedimentary rocks of the Los Pelambres Formation over gently folded early Miocene volcanic rocks of the Pachón Formation. Copper-gold mineralization at Frontera is hosted mainly by andesite of the Pachón Formation.

Los Pelambres and Frontera are spatially and genetically related to multiphase porphyry bodies that are located within and immediately southeast of the Los Pelambres stock. The stock is emplaced into the Late Cretaceous rhyolitic tuff and late Oligocene to early Miocene Los Pelambres and Pachón Formations.

East of the fault, the Pachón Formation is composed of gently to steeply dipping (20°-70°W), massive andesitic flows and flow breccias, whereas moderately to steeply dipping (50°-80°W) epiclastic rocks and andesite flows constitute the Los Pelambres Formation to the west. Several roof pendants and large blocks of massive andesite, some up to 500 m i ........

Mining Methods

  • Truck & Shovel / Loader

Summary:

Los Pelambres ore is mined by a single open pit via conventional truck and shovel mining method with preliminary drilling and blasting operations.

There are electric shovels and Front-end loaders used for extraction-and-loading. Haulage is carried out by 300 ton trucks.

Primary crushing circuit is located near the mine. Crushed material is transported via 12,8 km belt conveyor to processing facility stockpile.

Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.

^ Guidance / Forecast.

Production:

CommodityUnits2023202220212020201920182017
Copper kt  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required358338
Molybdenum kt  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily processing rate  ......  Subscription required  ......  Subscription required161.9 kt167.8 kt169.1 kt161.6 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required175 kt175 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2022:
The cut-off grade applied to the determination of mineral resources is 0.35% copper, while the cut-off grade applied for mineral reserves is variable over 0.35% copper.

CategoryTonnage CommodityGrade
Proven & Probable 905.5 Mt Copper 0.59 %
Proven & Probable 905.5 Mt Molybdenum 0.02 %
Proven & Probable 905.5 Mt Gold 0.05 g/t
Measured & Indicated 3,176 Mt Copper 0.54 %
Measured & Indicated 3,176 Mt Molybdenum 0.018 %
Measured & Indicated 3,176 Mt Gold 0.05 g/t
Inferred 2,780 Mt Copper 0.46 %
Inferred 2,780 Mt Molybdenum 0.016 %
Inferred 2,780 Mt Gold 0.06 g/t
Total Resource 5,955 Mt Copper 0.5 %
Total Resource 5,955 Mt Molybdenum 0.017 %
Total Resource 5,955 Mt Gold 0.05 g/t

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.52 / lb   1.44 / lb  
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.61 / lb   -0.42 / lb  
Cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 0.91 / lb†   1.02 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2022202120202019201820172016
Sustaining costs M USD  ......  Subscription required
Growth Capital M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 364.8   237.8   215.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 2,494   2,329   1,819  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,174   1,217   484.9  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,161   1,223   365.2  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 473.5   862.5   247.8  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,428   1,428   921  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 940.2   1,277  
Subscription required - Subscription is required

Pipelines and Water Supply
Source: Subscription required

- subscription is required.

Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2016
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2016
Drill ....................... Subscription required ....................... Subscription required Dec 31, 2016
Drill ....................... Subscription required ....................... Subscription required Apr 28, 2022
Loader ....................... Subscription required 33 cu. yd ....................... Subscription required Dec 31, 2016
Loader (FEL) ....................... Subscription required 54 cu. yd ....................... Subscription required Dec 31, 2016
Shovel ....................... Subscription required 53 cu. yd ....................... Subscription required Dec 31, 2016
Shovel ....................... Subscription required 73 cu. yd ....................... Subscription required Dec 31, 2016
Shovel ....................... Subscription required 73 cu. yd ....................... Subscription required Dec 31, 2016
Truck (haul) ....................... Subscription required 300 tons ....................... Subscription required Dec 31, 2016
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsYear
Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Other 2022
Other 2022
Quarterly Report 2022
Sustainability Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Other 2018
Press Release 2018
Annual Report 2017
Press Release 2017
Annual Report 2016
Corporate Presentation 2016
Annual Report 2015
Other 2012
Subscription required - Subscription is required.

News:

NewsDate
Antofagasta gears up for phased growth at both Los Pelambres and Centinela August 10, 2023

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