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Chile
Carmen de Andacollo Mine

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 Location:
1 km W from Andacollo, Chile

  Address:
Camino a Chepiquilla s/n
Andacollo
Chile
Phone56-51-431-589
Fax56-51-431-587
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start1996
Mine Life2036
The current life of mine for Carmen de Andacollo is expected to continue until 2036; however, additional permitting or amendments will be required to operate through to 2036.
Latest NewsTeck Announces 2022 Production and 2023 Guidance     January 30, 2023


Owners

Source: p. 33
CompanyInterestOwnership
Empresa Nacional de Minería (ENAMI) 10 % Indirect
Teck Resources Ltd. 90 % Indirect
Compañia Minera Teck Carmen de Andacollo S.A. (operator) 100 % Direct
Teck owns a 90% interest in the mine. The remaining 10% is owned by Empresa Nacional de Minería (ENAMI), a state-owned Chilean mining company.

Contractors



Deposit Type

  • Hybrid
  • Stratabound
  • Porphyry
  • Vein / narrow vein

Source: Source p.28-29

Summary:

The Carmen de Andacollo orebody is a porphyry copper deposit consisting of disseminated and fracture-controlled copper mineralization contained within a gently dipping sequence of andesitic to trachytic volcanic rocks and sub volcanic intrusions. The mineralization is spatially related to a feldspar porphyry intrusion and a series of deeply-rooted fault structures. A primary copper-gold sulphide deposit (the “hypogene deposit”) containing principally disseminated and quartz veinhosted chalcopyrite mineralization lies beneath the supergene deposit. The hypogene deposit was subjected to surface weathering processes resulting in the formation of a barren leached zone 10 to 60 metres thick.

The original copper sulphides leached from this zone were re-deposited below the barren leached zone as a copper-rich zone comprised of copper silicates (chrysocolla) and supergene copper sulphides (chalcocite with lesser covellite).

Carmen de Andacollo deposit has “hybrid” features with elements of Porphyry Copper and Stratabound deposits. The structural domain model consists of the following main faults, sorted by relative age from the oldest to the youngest: 1) Syn-Mineralization: Carmen Fault and Hermosa-Twila-Andacollo Set. 2) PostMineralization: NS and NE Faults. Six big configurable lithology groups were identified: Lower Volcanic Unit, Upper Volcanic Unit, Intrusive Rocks Unit, Breccia Unit, Undifferentiated Rocks, and gravels. Nine mineralization events associated with nine alterations events have been described. The mineralization/oxidation zones at Carmen de Andacollo are controlling influence on the Cu grades. From top to bottom in the profile the major mineralization zones are: Gravel, leached zone and oxide, strong and weak secondary enrichment and primary zone.

Nine mineralization events related to nine alterations events have been described, divided in 3 domains:

a) Primary Mineralization in Late magmatic Domain: chalcopyrite-bornite (traces), magnetite-chalcopyrite and chalcopyrite-molybdenite, related to Potassic Alteration with dominating Secondary Biotite; chalcopyrite-bornite related to Potassic Alteration with dominating Potassic Feldspar; chalcopyrite-magnetite-specularite-(bornite)-pyrite(?) associated with Albitic Alteration; pyrite, pyritechalcopyrite (traces), specularite-chalcopyrite (traces) and magnetite-chalcopyrite (traces) associated with Propylitic Alteration.

b) Primary Mineralization in Phyllic Domain: pyrite, pyrite-chalcopyrite asociations in Main Phyllic Alteration; pyrite (coarse), and pyrite-chalcopyrite-tennantite enargitetetrahedrite associated with Late Phyllic Alteration.

c) Primary and Secondary Mineralization in Argillic Domain: pyrite-cinnabar, pyrite-tennantite-enargite, cinnabar and pyrite-tennantite-chalcopyrite in Intermediate Argillic Alteration; chalcocite, chalcocite-(covellite) and supergene cinnabar (?) associated with Supergene Argillic Alteration.

The mineralization/oxidation zones at Carmen de Andacollo are a controlling influence on the Cu grades. From top to bottom in the profile the major mineralization zones are:

This is generally considered to be recent transported sediments. There are a few instances where this material is (was) old waste dumps from historic underground mines. Any material in this zone that contains Cu grades has already been mined.

The Leached Zone is defined by the presence of Fe-Oxides without Cu-oxides or any sulphides. The Oxide Zone is defined by the presence of Fe-Oxides and Cu-oxides without any sulphides. These two zones were combined for the estimation. The logged presence/absence of Copper oxides did not create a visible correlation to the Cu grades. There were significant grades within material logged as Leach (i.e. no visible Cu oxides) that would make the separation of these zones questionable.

Strong Secondary Enrichment (ESEC1). This zone is traditionally referred to as the Supergene Zone. It is defined by the presence of secondary Cusulphides, predominantly chalcocite, without the presence of chalcopyrite. While most drillholes showed this contact as a sharp contrast in CNCu there were some drillholes (~5%) that showed significant enrichment beyond this point. A second interpretation pass was needed displaying the CNCu value. If there was significant CNCu beyond the logged contact then the contact was moved to the point at which there was a sharp decline in CNCu grade.

Weak Secondary Enrichment (ESEC2). This zone is defined by the presence of Chalcocite and Chalcopyrite. The logging of small amounts of Chalcocite is inconsistent so this boundary contains significant amount of interpretation. It was considered that with the presence of Chalcopyrite, the dominant grade variability characteristics are the same as the Primary zone.This zone was used for defining Metallurgical characteristics.

Primary Zone. This zone is defined by the presence of primary minerals such as Chalcopyrite, Pyrite, Bornite, Tennantite, and no secondary Cu. PRIMC: Primary Zone featuring cavities. Rock fractures and cavities do not evidence or may be partially filled with gypsum. In the case of the latter, the roof of this area is called a “sulphate top” (TDSO4). PRIMS: Primary Zone with no cavities. Rock fractures and cavities are completely filled with gypsum (±anhydrite). The roof of this area is called a “dominant sulphate top” (TDSO4) and marks the end of supergene activity at the deposit. Top of carbonate – TCO3: Surface that marks the upper limit of the area featuring fractures and veinlets filled with calcite. Water is noticeably less acidic under this limit than the water above the limit.


Mining Methods

  • Truck & Shovel / Loader

Source:

Summary:

The Carmen de Andacollo mine is an open pit mine which produced copper concentrate from hypogene ore.

Traditional truck and shovel mining method with preliminary drilling and blasting operations is utilizing for extracting ore.


Crushing and Grinding
Source: Subscription required


Processing

  • Crush & Screen plant
  • Flotation
  • Heap leach
  • Dewatering
  • Solvent Extraction & Electrowinning

Source: Source

Summary:

The Carmen de Andacollo operation includes a heap leach copper operation and a copper-gold hypogene concentrator.

Copper concentrate is produced by processing hypogene ore through semi-autogenous grinding and a flotation plant with the capacity to process up to 55,000 tonnes of ore per day depending on ore hardness. Some supergene ore is also mined, which is transported to heap leach pads. Copper-bearing solutions are processed in an SX-EW plant to produce grade A copper cathode.

Copper concentrates produced at Carmen de Andacollo are trucked to the port of Coquimbo, Chile and from there by ship to customers in Asia and Europe. Copper cathode from Carmen de Andacollo mine is trucked from the mine and sold primarily under annual contracts to customers in Asia, Europe and North America.

Recoveries & Grades:

CommodityParameter2021202020192018201720162015
Copper Recovery Rate, % 83.885.588.486.9898988.6
Copper Head Grade, % 0.30.360.390.40.470.440.45

Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate kt 45-50 ^445552647270
Copper Cathode kt 1.322.43.73.53.7
Gold Metal in concentrate koz 364947605453
^ Guidance / Forecast.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined 26,766 kt27,185 kt20,763 kt24,140 kt26,516 kt28,837 kt
Tonnes milled 17,538 kt18,144 kt14,987 kt18,466 kt17,274 kt17,861 kt

Reserves at December 31, 2021:

CategoryOreTypeTonnage CommodityGradeRecoverable Metal
Proven Sulphide 103,000 kt Copper 0.33 %
Proven Sulphide 103,000 kt Gold 0.1 g/t
Probable Sulphide 178,600 kt Copper 0.31 %
Probable Sulphide 178,600 kt Gold 0.1 g/t
Proven & Probable Sulphide 281,600 kt Copper 0.31 % 690 kt
Proven & Probable Sulphide 281,600 kt Gold 0.1 g/t 550 koz
Measured Sulphide 41,500 kt Copper 0.28 %
Measured Sulphide 41,500 kt Gold 0.11 g/t
Indicated Sulphide 353,900 kt Copper 0.25 %
Indicated Sulphide 353,900 kt Gold 0.09 g/t
Inferred Sulphide 72,600 kt Copper 0.25 %
Inferred Sulphide 72,600 kt Gold 0.08 g/t

Financials:

Units202120202019201820172016
Revenue M CAD 547.8  491.1  438   542   610   446  
Gross profit M CAD 170  105.6  26   134   157   10  


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:
HME TypeModelQuantityRef. Date
Drill Epiroc DM45 2 Apr 1, 2012
Drill Atlas Copco ROC L8 1 Apr 1, 2012
Loader Caterpillar 994F 1 Apr 1, 2012
Loader Caterpillar 992G 1 Apr 1, 2012
Shovel O&K RH200 2 Apr 1, 2012
Shovel O&K RH40 1 Apr 1, 2012
Truck (haul) Caterpillar 777D 4 Aug 1, 2016
Truck (haul) Caterpillar 789C 7 Aug 1, 2016

Mine Management:

Job TitleNameProfileRef. Date
Chief Metallurgist Christian Jara LinkedIn Apr 29, 2022
Environmental Manager Paulina Soledad Puentes Diaz LinkedIn Apr 29, 2022
Environmental Superintendent Ximena Retamal Carrillo LinkedIn Apr 29, 2022
General Manager Manuel Novoa LinkedIn Apr 29, 2022
Health & Safety Superintendent Carlos Olivares LinkedIn Apr 29, 2022
Mobile Equipment Maintenance Superintendent Erwin Honores LinkedIn Apr 29, 2022


Corporate Filings & Presentations:

DocumentYear
Quarterly Report 2022
Annual Information Form 2021
Quarterly Report 2021
Annual Information Form 2020
Annual Report 2020
Press Release 2020
Quarterly Report 2020
Sustainability Report 2020
Annual Information Form 2019
Management Discussion & Analysis 2019
Annual Information Form 2018
Annual Report 2018
Quarterly Report 2018
Annual Information Form 2017
Annual Report 2017
Press Release 2017
Quarterly Report 2017
Annual Information Form 2016
Annual Report 2016
Other 2016
Annual Report 2015
Press Release 2015
Annual Report 2014
Corporate Presentation 2012
Other 2012

News:

NewsDate
Teck Announces 2022 Production and 2023 Guidance January 30, 2023

Aerial view:

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