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Canada
Gibraltar Mine

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 Location:
41 km N from Williams Lake, British Columbia, Canada

  Address:
10251 Gibraltar Mine Road
McLeese Lake
British Columbia, Canada
V0L 1P0
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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
  • Molybdenum
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life23 years (as of Jan 1, 2022)
Gibraltar Mine is one of the largest copper mines in North America.
Latest NewsTaseko Closes Acquisition Of 12.5% Interest In Gibraltar Copper Mine     March 15, 2023


Owners

Source: p. 1
CompanyInterestOwnership
Taseko Mines Ltd. 87.5 % Indirect
On March 15, 2023, Taseko Mines Limited ("Taseko" or the "Company") announced the completion of its acquisition of an additional 12.5% interest in the Gibraltar Mine from Sojitz Corporation ("Sojitz"). Gibraltar is operated through a joint venture which is owned 75% by Taseko and 25% by Cariboo Copper Corporation ("Cariboo"). Under the terms of the Agreement, Taseko has acquired Sojitz's 50% interest in Cariboo, and now holds an effective 87.5% interest in the Gibraltar Mine.

Contractors

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Deposit Type

  • Porphyry


Summary:

Deposit Type
The Gibraltar open pit mine is a calc-alkalic porphyry copper-molybdenum deposit entirely hosted by the Late Triassic Granite Mountain batholith. This pluton occurs in a fault-bounded panel of Quesnel terrane rocks that are partially enveloped by rocks of the oceanic Cache Creek terrane (van Straaten et al., 2020). The oceanic Cache Creek terrane that occurs to the west and the Quesnel volcanic arc terrane are part of the accretionsubduction complex that was responsible for generating the Granite Mountain batholith and other Late Triassic plutons such as the Guichon Creek batholith that hosts the Highland Valley porphyry Cu-Mo deposits located 250 km to the south-southeast.

Mineralization in the Pollyanna, Granite, and Connector deposits is hosted in massive to strongly foliated zones. In contrast, mineralization in the Extension deposit is almost entirely hosted in strongly foliated shear zones. At Gibraltar mine, the Granite, Pollyanna and Connector deposits have been described as “porphyry-type ore”, the Extension deposit as “shear zone ore,” and Gibraltar as intermediate between the two (Bysouth et al., 1995).

Mineralization
Primary hypogene copper mineralization in the form of disseminated and vein-hosted chalcopyrite predominates at Gibraltar. Minor bornite occurs typically in the east and northeast portions of the deposit. Molybdenite occurs mainly in quartz veins and fractures, and rarely as matrix disseminations. Sphalerit ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Gibraltar deposits have been developed using open pit, truck and shovel mining methods since 1971. To date, mining has progressed in several phases in the Gibraltar, Pollyanna, and Granite pits with future mining to continue in the Pollyanna and Gibraltar pits as well as the currently undeveloped Connector and Extension pit areas.

Mining operations supply 85,000 tons per day of ore at an average head-grade of 0.25% copper to two primary crushers which in-turn feed the two concentrators as discussed in Section 17. During the 23-year mine life, a total of 699 million tons of sulphide ore, 17 million tons of oxide ore and 1,667 million tons of waste will be mined from the reserve pits at a strip ratio of 2.4. An additional 6 million tons of stockpiled ore will be processed.

For strategic and operational reasons surplus ore is stockpiled at various times during the mine life and for various amounts of time prior to processing. Waste rock is stored in various waste rock storage facilities next to the pits, as well as in previously mined pits after mining of those pits is complete. Suitable overburden waste is salvaged and stored separately for use in reclamation.

Pit Design
Pit slope designs are based on recommendations from geotechnical consultants and historical operating experience. All the pits in the reserve plan are designed with a bench height of 50 ft, a bench face angle of 65 degrees. Safety berms are a minimum of 27 ft wide and ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required125133133
Molybdenum Metal in concentrate k lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required
Copper Cathode M lbs
^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required100.4 M tons111.6 M tons93.1 M tons87.6 M tons
Tonnes milled  ......  Subscription required  ......  Subscription required29.9 M tons30.1 M tons29.8 M tons29.5 M tons
Stripping / waste ratio  ......  Subscription required  ......  Subscription required2.6 2.7 3.4 1.5
Daily milling capacity  ......  Subscription required  ......  Subscription required85,000 tons85,000 tons
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Reserves at December 31, 2021:
Gibraltar Mine Sulphide Mineral Reserves at 0.15% Copper Cut-off.

Gibraltar Mine Mineral Resources at 0.15% Copper Cut-off.

CategoryTonnage CommodityGrade
Proven 509 M tons Copper 0.25 %
Proven 509 M tons Molybdenum 0.008 %
Proven 509 M tons Copper Equivalent 0.27 %
Probable 191 M tons Copper 0.23 %
Probable 191 M tons Molybdenum 0.008 %
Probable 191 M tons Copper Equivalent 0.24 %
Proven & Probable 706 M tons Copper 0.25 %
Proven & Probable 706 M tons Molybdenum 0.008 %
Proven & Probable 706 M tons Copper Equivalent 0.26 %
Measured 845 M tons Copper 0.25 %
Measured 845 M tons Molybdenum 0.007 %
Measured 845 M tons Copper Equivalent 0.27 %
Indicated 370 M tons Copper 0.23 %
Indicated 370 M tons Molybdenum 0.007 %
Indicated 370 M tons Copper Equivalent 0.25 %
Measured & Indicated 1,215 M tons Copper 0.24 %
Measured & Indicated 1,215 M tons Molybdenum 0.007 %
Measured & Indicated 1,215 M tons Copper Equivalent 0.26 %
Inferred 78 M tons Copper 0.22 %
Inferred 78 M tons Molybdenum 0.004 %
Inferred 78 M tons Copper Equivalent 0.23 %

Commodity Production Costs:

CommodityUnits202120202019201820172016
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.2 / lb   -0.13 / lb   -0.06 / lb  
Site cash costs (produced) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.8 / lb   1.22 / lb   1.58 / lb  
Site cash costs (produced) Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.6 / lb†   1.09 / lb†   1.52 / lb†  
C1 cash costs Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.93 / lb†   1.43 / lb†   1.85 / lb†  
† Net of By-Product.
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Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/ton milled) CAD 9.219.5910.99.717.489.479.83

Financials:

Units202120202019201820172016
Sustaining costs M CAD  ......  Subscription required
Capital expenditures M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 84.8   114.8   18.7  
Revenue M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 457.6   507.2   351.8  
After-tax Income M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 30.1   148.5   -18  
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Heavy Mobile Equipment as of March 15, 2022:
HME TypeSizeQuantityStatus
Drill ....................... Subscription required Proposed
Drill (blasthole) 12.25 inch ....................... Subscription required Existing
Loader (FEL) 30 cu. yd ....................... Subscription required Existing
Shovel (rope) 56 cu. yd ....................... Subscription required Existing
Shovel (rope) 58 cu. yd ....................... Subscription required Existing
Shovel (rope) 44 cu. yd ....................... Subscription required Existing
Truck (haul) 320 tons ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 3, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 3, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required 2016
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Press Release 2023
Corporate Presentation 2022
Corporate Presentation 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Quarterly Report 2018
Corporate Presentation 2017
Quarterly Report 2017
Annual Report 2016
Management Discussion & Analysis 2016
Corporate Presentation 2015
Management Discussion & Analysis 2015
Technical Report 2015
Annual Report 2014
Project Description 2014
Management Discussion & Analysis 2013
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News:

NewsDate
Taseko Closes Acquisition Of 12.5% Interest In Gibraltar Copper Mine March 15, 2023
Taseko Reports Fourth Quarter And Annual Earnings February 23, 2023
Taseko Signs Definitive Agreement To Acquire 12.5% Interest In Gibraltar Copper Mine February 22, 2023
Taseko Comments On Potential Acquisition Of 12.5% Interest In Gibraltar Mine February 3, 2023

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