Minera Antucoya S.A. is a 70% subsidiary of Antofagasta, and holds the Antucoya operations. Marubeni Corporation, the Antofagasta’s 30% minority partner in Antucoya.
| Contractor | Contract | Description | Ref. Date | Expiry | Source |
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Power supply
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May, 2019 - Minera Antucoya has signed a long-term agreement with ENGIE Energia Chile SA. The new agreement, which will begin in January 2022 has a term of eleven years.
ENGIE Energía Chile will supply around 300GWh of power generated by renewable energy sources to Minera Antucoya each year.
January, 2022 - completed the transition of Antucoya to electricity generated exclusively from renewable sourced contract.
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May 31, 2019
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11
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Summary:
ceous 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.
Reserves & Resources at December 31, 2023
The ore reserve cut-off grade is 0.16% copper, while the cut-off grade for mineral resources is 0.15% copper.
Mineral Resources are reported inclusive of Mineral Reserves.
| Category | Tonnage | Commodity | Grade |
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Proven
|
513 Mt
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Copper
|
0.35 %
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Probable
|
336 Mt
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Copper
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0.3 %
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Proven & Probable
|
848 Mt
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Copper
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0.34 %
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Measured
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537 Mt
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Copper
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0.35 %
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Indicated
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421 Mt
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Copper
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0.3 %
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Measured & Indicated
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959 Mt
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Copper
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0.33 %
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Inferred
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328 Mt
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Copper
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0.27 %
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Total Resource
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1,286 Mt
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Copper
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0.31 %
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Summary:
ore.
There are electric shovels and front-end loaders used for extraction-and-loading.
Heavy Mobile Equipment
| HME Type | Model | Quantity |
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Drill
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Epiroc D65
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1
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Drill (blasthole)
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Caterpillar MD6240
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2
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Loader (FEL)
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LeTourneau L2350
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1
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Shovel (rope) - EV
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P&H 4100 XPC
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2
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Truck (haul)
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Komatsu 930E
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10
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EV - Electric
Comminution
Crushers and Mills
| Type | Model | Size | Power | Quantity |
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Jaw crusher
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1
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Cone crusher
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2
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Beneficiation
- Sulfuric acid (reagent)
- Crush-and-stack plant
- Heap leach
- Solvent Extraction & Electrowinning
Summary:
electrowinning (“SX-EW”) plant to produce copper cathodes, which are sold to fabricators around the world.
Solvent Extraction And Electrowinning
A process for extracting metal from an ore and producing pure metal. First the metal is leached into solution, the resulting solution is then purified in the solvent-extraction process before being treated in an electrochemical process (electrowinning) to recover cathode copper.
Recoveries & Grades:
| Commodity | Parameter | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
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Copper
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Head Grade, %
| 0.34 ^ | 0.33 | 0.34 | 0.34 | 0.38 | 0.39 | 0.37 | 0.37 | 0.39 |
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Copper
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Recovery Rate, %
| | 67.9 | 69 | 69.1 | 73.7 | 74.6 | 71.6 | 73.7 | 70.6 |
Summary:
erse osmosis plant to produce drinking water for the camp. All the water used in camps and offices is collected for treatment in the wastewater treatment plant and is used to moisten our internal roads and the open pit loading area.
Antofagasta already only uses sea water for Antucoya operation. By 2025, Antofagasta expects 90% of mining operations’ water consumption will be recirculated or sea water.
The shared pipeline between Antucoya and Centinela is a major synergy.
Commodity Production
| Commodity | Units | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
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Copper
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t
| 75,000-80,000 ^ | 94,800 | 92,310 | 87,447 | 101,234 | 87,198 | 82,953 | 87,351 | 67,608 |
All production numbers are expressed as cathode.
^ Guidance / Forecast.
Operational metrics
| Metrics | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
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Daily processing rate
| 105.6 kt | 101.9 kt | 93 kt | 78.8 kt | 65.5 kt | 69.7 kt | 70.2 kt | 56 kt |
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Daily processing capacity
| 119,171 t | 113,990 t | 108,808 t | 103,627 t | 98,446 t | | | |
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Waste
| 40,012,821 Mt | 28.5 Mt | 29.4 Mt | 23.8 Mt | 22.6 Mt | | | |
Production Costs
| | Commodity | Units | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
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Cash costs
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Copper
|
USD
|
1.92 / lb ^
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2.03 / lb
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1.92 / lb
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1.57 / lb
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1.78 / lb
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1.67 / lb
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1.95 / lb
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1.64 / lb
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^ Guidance / Forecast.
Mine Financials
| | Units | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
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Sustaining costs
|
M USD
| 64.2 | 68.4 | | |
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Capital expenditures
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M USD
| 89.1 | 57.7 | 74 | 52.6 |
59
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56.6
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57.1
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Revenue
|
M USD
| 532.5 | 557.2 | 552.7 | 380.4 |
342.3
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362.5
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402.9
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Operating Income
|
M USD
| 77.2 | 113.6 | 269.4 | 61.3 |
-12.8
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74.2
|
95.8
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Pre-tax Income
|
M USD
| 59.4 | 96 | 289.6 | 50.2 |
-55.8
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8.8
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62.1
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After-tax Income
|
M USD
| 57.5 | 70.5 | 277.2 | 49.8 |
-56
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31.9
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EBITDA
|
M USD
| 273.2 | 295.2 | 267 | 121 |
63
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103.4
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263.3
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Operating Cash Flow
|
M USD
| 266.3 | 118.3 | 297.1 | 107.5 |
63.6
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59
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272.1
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Personnel
| Job Title | Name | Profile | Ref. Date |
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Chief Operating Officer
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Patricio Mora
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Jun 30, 2024
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Mine General Manager
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Ivo Fadic
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Jun 30, 2024
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| Employees | Contractors | Year |
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949
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1,747
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2023
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894
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1,309
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2022
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817
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2021
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798
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2020
|
|
787
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2019
|
|
786
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2018
|
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737
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2017
|
|
726
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2016
|
|
698
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2015
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