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Chile
Antucoya Mine

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 Location:
98 km W from Calama, Chile

  Regional Office:
Av. Apoquindo 4001 – piso 18
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
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2044
Antucoya mines and leaches oxide ore to produce copper cathodes using the solvent extraction and electrowinning (SX-EW) process.

Patented Cuprochlor®-T technology has completed industrial-scale testing and unlocked a solution to economically leach low-grade primary sulphides. It is now being incorporated into Antucoya mine plans.

In 2022 Antofagasta completed the transition of all operations to electricity generated exclusively from renewable sourced contracts.

In 2022, Antofagasta participated in pilot projects to develop electricpowered haulage trucks at Antucoya.


Owners

Source: p. 213,256
CompanyInterestOwnership
Marubeni Corp. 30 % Indirect
Antofagasta plc. 70 % Indirect
Minera Antucoya S.A., is a 70%-owned subsidiary of Antofagasta, and holds the Antucoya operations. Marubeni Corporation, the Antofagasta’s 30% minority partner in Centinela and Antucoya.

Contractors

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Deposit Type

  • Porphyry


Summary:

The Antucoya porphyry copper deposit is situated 120 km northeast of Antofagasta in the Early Cretaceous metallogenic belt of the Coastal Cordillera.

The mineralized system is related to granodioritic porphyry (Antucoya porphyry) and dacite porphyry (Buey Muerto porphyry). Late dacitic dikes intrude the former ore-related intrusions and Jurassic andesitic host rocks in a tectonic environment dominated by splays of the Atacama Fault System.

The principal mineralization constitutes a column 350 m thick, composed of atacamite, brochantite, Fe-Cu sulfates, Cubearing limonite, chrysocolla and black oxides, with rare chalcocite and covellite in a thin supergene enrichment blanket.

In the underlying hypogene zone, the mineralization is dominated by chalcopyrite>pyrite>bornite hosted by A- and B veins in potassic alteration, and in C-veins on the periphery of the porphyry intrusions. The pyrite/chalcopyrite ratio is greater in D-veins within a shallow phyllic zone. The Mo distribution is erratic and poorly characterized.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Antucoya is a low-grade, low strip-ratio, oxide deposit.

Conventional open-pit mining method with preliminary drilling and blasting operations is utilized for extraction oxide ore.

There are electric shovels and Front-end loaders used for extraction-and-loading.


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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^ Guidance / Forecast.

Production:

CommodityUnits2023202220212020201920182017
Copper t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required72,20080,500
All production numbers are expressed as cathode. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily processing rate  ......  Subscription required  ......  Subscription required76 kt66.5 kt74.7 kt79.7 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required100,000 t100,000 t
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Reserves at December 31, 2022:
The ore reserve cut-off grade is 0.16% copper, while the cut-off grade for mineral resources is 0.15% copper.

CategoryTonnage CommodityGrade
Proven 436.2 Mt Copper 0.33 %
Probable 281.4 Mt Copper 0.29 %
Proven & Probable 717.6 Mt Copper 0.31 %
Measured 463.7 Mt Copper 0.32 %
Indicated 348.5 Mt Copper 0.29 %
Measured & Indicated 812.3 Mt Copper 0.31 %
Inferred 302.3 Mt Copper 0.26 %
Total Resource 1,115 Mt Copper 0.3 %

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.99 / lb   1.68 / lb  
^ Guidance / Forecast.
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Sustaining costs M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 65.7   78.2   27.4  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 457.6   508.6   277.9  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 62.9   131.2   -213.4  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 11.4   85.1   -248.3  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 27  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 141.6   207.3   64.9  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 80.8   240.7  
Subscription required - Subscription is required


Pipelines and Water Supply
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Heavy Mobile Equipment as of December 31, 2016:
HME TypeModelQuantity
Drill ....................... Subscription required ....................... Subscription required
Drill (blasthole) ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 28, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 25, 2023
Subscription required - Subscription is required.

Staff:

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

Corporate Filings & Presentations:

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

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