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Chile
Candelaria Mine (Candelaria Complex)

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 Location:
17 km S from Copiapó, Chile

  Address:
Inside Ojancos Bridge Km. 9
Tierra Amarilla
Chile
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  • Overview
  • Owners
  • Geology
  • Mining
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
  • Sub-level open stoping (SLOS)
Production Start...
Mine Life2044


Owners

Source: p. 77
CompanyInterestOwnership
Sumitomo Corp. 4 % Indirect
Sumitomo Metal Mining Co., Ltd 16 % Indirect
Lundin Mining Corp. 80 % Indirect
As part of its Candelaria segment, the Company owns 80% of Compañia Contractual Minera Candelaria S.A. and Compañia Contractual Minera Ojos del Salado S.A.’s copper mining operations and supporting infrastructure in Chile. The remaining 20% ownership stake is held by Sumitomo Metal Mining Co., Ltd. and Sumitomo Corporation.

Contractors

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Deposit Type

  • IOCG
  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Skarn
  • Manto


Summary:

The copper-gold sulphide mineralization present at the Candelaria Copper Mining Complex is generally referred to as iron oxide copper gold (“IOCG”). Depending on lithology and the structural setting, the polymetallic sulphide mineralization can occur as veins, hydrothermal breccias, replacement mantos, and calcic skarns.

Calcareous, sedimentary, and volcaniclastic rock of the Abundancia and Punta del Cobre formations are exposed within the open pit of the Candelaria mine. Due to the closer proximity to the Coastal Batholith, rocks in the open pit of the Candelaria mine show stronger metasomatism and metamorphism than in other sulphide deposits of the Punta del Cobre district.

The lowermost unit in the Candelaria mine and Candelaria Underground is the Lower Andesite, a compact succession of porphyritic to massive andesite and volcaniclastic breccias with intense biotite-quartz-magnetite-albite alteration. The Lower Andesite is overlain by a succession of stratified volcaniclastic rocks including tuffs, which are further sub-divided by alteration and mineralisation into pink garnet skarn and magnetite breccia. The Upper Andesite of the Punta de Cobre Formation consists of a homogenous succession of undifferentiated volcaniclastic and andesitic rock. The biotite-bearing andesite exhibits alteration varying from quartz-pyroxene hornfels to pyroxene-scapolite-garnet skarns.

At the Candelaria mine a low angle shear zone, located at the confluence o ........


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level open stoping (SLOS)


Summary:

Minera Candelaria consists of the Candelaria Open Pit and the Candelaria Underground mines.

The open pits will operate with an overall mining rate of approximately 310,000 tonnes per day for the next ten years. As the final Candelaria Phase 13 waste stripping is completed the overall mining rate will decline. A stockpile strategy has been developed to maximize the grade of material going to the processing facility.

TThe Candelaria open pit was designed to be mined in several phases of development. As of June 2018, five phases of development remain in the LOM plan.

The primary components for the open pit slope design include bench geometry, inter-ramp, and overall slope angles (Figure 28). The current pit dimensions are 2,200 metres by 1,400 metres with a depth of 700 metres. Current inter-ramp slope angles range from 45 to 52 degrees in the west wall and from 52 to 57 degrees in the east wall. Bench face angles range from 65 to 72 degrees.

The Candelaria Open Pit is relatively dry owing to its location in an arid region. The northeast wall appears to be receiving some seepage from the toe of the tailings dam. Horizontal drain holes have been drilled up to 200 metres into the wall to reduce pore pressures in the area of the Lar fault.

SRK is of the opinion that the stopes that support the proposed LOM plan for the Candelaria, Alcaparrosa and Santos underground mines can be mined as expected. The three underground mines u ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2013
Copper M lbs 462
Gold koz  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics2021202020192018
Daily processing capacity  ......  Subscription required  ......  Subscription required75,000 t75,000 t
Annual processing capacity  ......  Subscription required  ......  Subscription required27 Mt
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Reserves at June 30, 2021:
OP Mineral Resource estimates is reported with cut-off grades of 0.15% copper.
Underground Mineral Resources are estimated at a cut-off grade of 0.45% copper.
Mineral Reserves for the Candelaria open pit and underground for the Candelaria property are estimated at cut-off grades of 0.16% and 0.50% copper, respectively.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 83,695 kt Copper 0.31 % 262 kt
Proven In-Situ (OP) 347,365 kt Copper 0.47 % 1,646 kt
Proven In-Situ (UG) 77,126 kt Copper 0.87 % 673 kt
Proven Stockpiles 83,695 kt Gold 0.09 g/t 0.2 M oz
Proven In-Situ (OP) 347,365 kt Gold 0.11 g/t 1.3 M oz
Proven In-Situ (UG) 77,126 kt Gold 0.2 g/t 0.5 M oz
Proven Stockpiles 83,695 kt Silver 1.33 g/t 4 M oz
Proven In-Situ (OP) 347,365 kt Silver 1.61 g/t 18 M oz
Proven In-Situ (UG) 77,126 kt Silver 3.19 g/t 8 M oz
Probable In-Situ (OP) 22,342 kt Copper 0.33 % 74 kt
Probable In-Situ (UG) 87,006 kt Copper 0.79 % 691 kt
Probable In-Situ (OP) 22,342 kt Gold 0.07 g/t 0.1 M oz
Probable In-Situ (UG) 87,006 kt Gold 0.18 g/t 0.5 M oz
Probable In-Situ (OP) 22,342 kt Silver 0.76 g/t 1 M oz
Probable In-Situ (UG) 87,006 kt Silver 2.92 g/t 8 M oz
Proven & Probable Total 617,574 kt Copper 0.54 % 3,345 kt
Proven & Probable Total 617,574 kt Gold 0.13 g/t 2.5 M oz
Proven & Probable Total 617,574 kt Silver 1.91 g/t 38 M oz
Measured Stockpiles 83,695 kt Copper 0.31 % 259 kt
Measured In-Situ (OP) 479,622 kt Copper 0.45 % 2,158 kt
Measured In-Situ (UG) 274,950 kt Copper 0.94 % 2,577 kt
Measured Stockpiles 83,695 kt Gold 0.08 g/t 0.2 M oz
Measured In-Situ (OP) 479,622 kt Gold 0.1 g/t 1.5 M oz
Measured In-Situ (UG) 274,950 kt Gold 0.21 g/t 1.9 M oz
Measured Stockpiles 83,695 kt Silver 1.32 g/t 4 M oz
Measured In-Situ (OP) 479,622 kt Silver 1.59 g/t 25 M oz
Measured In-Situ (UG) 274,950 kt Silver 3.09 g/t 27 M oz
Indicated In-Situ (OP) 35,308 kt Copper 0.28 % 99 kt
Indicated In-Situ (UG) 295,536 kt Copper 0.83 % 2,458 kt
Indicated In-Situ (OP) 35,308 kt Gold 0.07 g/t 0.1 M oz
Indicated In-Situ (UG) 295,536 kt Gold 0.18 g/t 1.7 M oz
Indicated In-Situ (OP) 35,308 kt Silver 1.06 g/t 1 M oz
Indicated In-Situ (UG) 295,536 kt Silver 2.75 g/t 26 M oz
Inferred In-Situ (OP) 6,237 kt Copper 0.21 % 13 kt
Inferred In-Situ (UG) 75,584 kt Copper 0.87 % 660 kt
Inferred In-Situ (OP) 6,237 kt Gold 0.04 g/t
Inferred In-Situ (UG) 75,584 kt Gold 0.19 g/t 0.5 M oz
Inferred In-Situ (OP) 6,237 kt Silver 0.63 g/t
Inferred In-Situ (UG) 75,584 kt Silver 2.83 g/t 7 M oz


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:
HME TypeModelSizeQuantityLeased or
Contractor
Ref. Date
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Drill ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Drill ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Drill ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Drill ....................... Subscription required Leased Nov 28, 2018
Drill (long hole) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Drill jumbo (two boom) ....................... Subscription required Leased Nov 28, 2018
Excavator ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Excavator ....................... Subscription required 12 cu. m ....................... Subscription required Leased Nov 28, 2018
Grader ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Grader ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Loader ....................... Subscription required 16 cu. m ....................... Subscription required Leased Nov 28, 2018
Loader ....................... Subscription required 9 cu. m ....................... Subscription required Leased Nov 28, 2018
Loader (FEL) ....................... Subscription required Leased Nov 28, 2018
Load-Haul-Dump (LHD) ....................... Subscription required Leased Nov 28, 2018
Shovel (rope) ....................... Subscription required 43 cu. m ....................... Subscription required Leased Nov 28, 2018
Shovel (rope) ....................... Subscription required 28 cu. m ....................... Subscription required Leased Nov 28, 2018
Shovel (rope) ....................... Subscription required 13 cu. m ....................... Subscription required Leased Nov 28, 2018
Truck (haul) ....................... Subscription required ....................... Subscription required Leased Dec 31, 2021
Truck (underground) 30 t ....................... Subscription required Leased Nov 28, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Leased Nov 28, 2018
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 10, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Information Form 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Technical Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Technical Report 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Form 10-K 2013
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