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Chile
Antucoya Mine

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 Location:
41 km E from Cobija, Chile

  Regional Office:
Av. Apoquindo 4001 – piso 18
Santiago
Chile
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • 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
Processing
  • Sulfuric acid (reagent)
  • Heap leach
  • Solvent Extraction & Electrowinning
Mine Life2040


Owners

 
CompanyInterestOwnership
Marubeni Corp. 30 % Indirect
Antofagasta plc. 70 % Indirect
Minera Antucoya Sa. 100 % Direct

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 Bveins 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. The total resource is 1204 Mt at 0.31%CuT, using a 0.15%CuT cut-off.


Mining Methods

  • Truck & Shovel / Loader


Summary:


Crushing and Grinding


Processing

  • Sulfuric acid (reagent)
  • Heap leach
  • Solvent Extraction & Electrowinning

Source: Subscription required

Summary:

Mined oxide ore is crushed, piled into heaps and then leached with sulphuric acid, producing a copper sulphate solution. This solution is then put through a solvent extraction and electrowinning (“SX-EW”) plant to produce copper cathodes, which are sold to fabricators around the world.

Recoveries & Grades:

CommodityParameter2019201820172016
Copper Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Head Grade, % 0.390.370.370.39
Subscription required - Subscription is required.

Production:

CommodityUnits20202019201820172016
Copper t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required80,50066,200
All production numbers are expressed as cathode. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2019201820172016
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required67.6 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required45 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGrade
Proven 292.5 Mt Copper 0.39 %
Probable 394.5 Mt Copper 0.28 %
Proven & Probable 687 Mt Copper 0.33 %
Measured 441.3 Mt Copper 0.33 %
Indicated 393.8 Mt Copper 0.31 %
Measured & Indicated 835.1 Mt Copper 0.32 %
Inferred 365.7 Mt Copper 0.28 %

Commodity Production Costs:

CommodityUnits20202019201820172016
Cash costs Copper USD  ......  Subscription required ^  ......  Subscription required  ......  Subscription required 1.68 / lb 1.83 / lb
^ Guidance / Forecast.
Subscription required - Subscription is required.

Financials:

Units2019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment as of December 31, 2016:
HME TypeModelQuantity
Drill ....................... Subscription required 2
Drill ....................... Subscription required 1
Loader (FEL) ....................... Subscription required 1
Shovel ....................... Subscription required 2
Truck (haul) ....................... Subscription required 10
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 3, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 3, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 3, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 3, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Corporate Presentation 2017
Press Release 2017
Annual Report 2016
Corporate Presentation 2016
Annual Report 2015
Other 2015
Subscription required - Subscription is required.

Aerial view:

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