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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
Processing
  • Dewatering
  • Filter press plant
  • Flotation
  • ROM/dump leach
  • Solvent Extraction & Electrowinning
Mine Life18 years (as of Jan 1, 2020)
Second largest open pit copper mine in Canada.
Latest NewsTaseko Reports $108 Million of Adjusted EBITDA for 2020     February 24, 2021


Owners

Source: p. 13
CompanyInterestOwnership
Taseko Mines Ltd. 75 % Indirect
Taseko owns 100% of Gibraltar Mines Ltd, which in turn owns 75% of the Gibraltar Joint Venture. On March 31, 2010, Taseko established an unincorporated joint venture (“JV”) between Gibraltar Mines Ltd., and Cariboo Copper Corp. (“Cariboo”) over the Gibraltar copper and molybdenum mine, whereby Cariboo acquired a 25% interest in the Gibraltar Mine and Taseko retained a 75% interest with Gibraltar Mines Ltd. operating the mine for the two JV participants. Cariboo is a Japanese consortium jointly owned by Sojitz Corporation (50%), Dowa Metals & Mining Co., Ltd. (25%) and Furukawa Co., Ltd. (25%).

Deposit Type

  • Porphyry


Summary:

The Gibraltar mine is a large calcalkaline copper-molybdenum porphyry deposit located about 10 km north of McLeese Lake, British Columbia, and hosted by tonalite of the Late Triassic Granite Mountain batholith.

The Gibraltar Mine is a bulk tonnage, low-grade copper-molybdenum deposit concentrated along hydrothermally altered shear zones within the Granite Mountain Batholith along the west slope of Granite Mountain. It is one of the lowest grade base metal deposits ever mined in British Columbia. It is also the first in the province to have the majority of its initial production from supergene ore.

Copper-molybdenum mineralized rocks at Gibraltar have been mined from four open pits, the Gibraltar East (093B 012), Gibraltar West (093B 007), Granite Lake (093B 013) and Pollyanna (093B 006) (Figure 4). The ore bodies mined form part of a semi-continuous, anastomosing mineralized shear zone up to 100 metres or more in thickness, that parallels the strike of the regional foliation. The shear zone and associated mineralization are affected by broad open folding and display a geometry similar to that described previously for the regional foliation. Sulphide mineralization develops within or marginal to the more schistose zones, and fades out into the more massive, less foliated quartz diorite, with mineralization confined largely to the foliation surfaces and narrow mineralized veinlets (Simpson, 1970). The best mineralization is found towards the center of the mineralized belt of schistose rocks. The main ore minerals are chalcopyrite, chalcocite (supergene) and molybdenite. Pyrite is common in both ore and peripheral alteration zones and also forms an extensive halo with a few percent pyrite that envelopes the mineralized shear.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Gibraltar deposits have been developed using open pit mining methods since the commencement of mining on site in 1971.

Current and future mining operations will be carried out utilizing conventional open pit mining equipment. The waste and ore are mined utilizing five electric blast hole drills, five electric rope shovels, one large front end loader and 26 haul trucks. The main mining fleet is supported by a fleet of ancillary equipment including track and rubber tired dozers, motor graders as well as sand and water trucks. The reserve mine plan does not require the purchase of any additional mine production equipment.


Crushing and Grinding
Crusher / Mill TypeModelSizePowerQuantity
Gyratory crusher 60" x 89" 1
Gyratory crusher 54" x 74" 1
SAG mill 34' 13000 HP 2
Ball mill 20' 8500 HP 1
Ball mill 13.5' 2500 HP 6
Regrind ....................... Subscription required 1
Vertical mill / Tower ....................... Subscription required 1500 HP 2

Summary:

Bulk Concentrator #1
Gibraltar sulphide ore is processed through a single stage of crushing using a 60x89 gyratory crusher. This crusher produces a 6 inch minus product which is conveyed to a coarse ore stockpile. Material is drawn from the coarse ore stockpile using apron feeders and a conveyor belt to feed a 34 foot diameter, 13,000 Hp Semi-Autogeneous Grinding (SAG) mill. SAG mill discharge is screened with the oversize returning via conveyor belt to the feed of the mill. Undersize material, consisting of 0.5 inch minus, is then pumped to a distributor where six 13.5 foot diameter, 2500 Hp ball mills are operated in closed circuit with hydrocyclones to produce a minus 350 micron product used to feed the flotation circuit. Design mill throughput is 55,000 t/day.

Bulk Concentrator #2
Gibraltar sulphide ore is processed through a single stage of crushing using a 54x74 gyratory crusher. This crusher produces a 6 inch minus product which is conveyed to a coarse ore stockpile. Material is drawn from the coarse ore stockpile using apron feeders and a conveyor belt to feed a 34 foot diameter, 13,000 Hp Semi-Autogeneous Grinding (SAG) mill. SAG mill discharge is screened with the oversize returning via conveyor belt to the feed of the mill. Undersize material, consisting of 0.5 inch minus, is then pumped to a distributor where a single 20 foot diameter 8,500 Hp ball mill is operated in closed circuit with hydrocyclones to produce a minus 350 micron product used to feed the flotation circuit. Design mill throughput is 30,000 t/day.


Processing

  • Dewatering
  • Filter press plant
  • Flotation
  • ROM/dump leach
  • Solvent Extraction & Electrowinning

Source: Subscription required

Summary:

Sulphide ore is processed at a design rate of 85,000 t/day through two bulk concentrators to produce a concentrate which contains copper, silver and molybdenum values. The bulk concentrate from both facilities is combined and processed through a single molybdenum flotation plant. The molybdenum concentrate from this plant is dewatered and bagged, and subsequently shipped to market. The underflow from this plant is the final copper concentrate which includes silver as a by- product. The copper concentrate is dewatered and shipped in bulk to market.

A solvent extraction and electrowinning plant processes leachate from oxide waste dumps to produce a copper cathode product. This system is operated intermittently as conditions allow.

Bulk Concentrator #1
Flotation feed is pumped to two parallel rougher flotation circuits, each consisting of five 160m3 flotation vessels. Flotation tailings are then pumped to a storage facility. Rougher concentrate from the parallel ........

Recoveries & Grades:

CommodityParameter202020192018201720162015201420132012
Copper Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Head Grade, % 0.240.240.250.280.260.270.260.290.31
Molybdenum Recovery Rate, %  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityProductUnits2021202020192018201720162015
Copper Metal in concentrate M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required125133133141
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  ......  Subscription required
Copper Cathode M lbs 1
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Total tonnes mined  ......  Subscription required  ......  Subscription required111.6 M tons93.1 M tons87.6 M tons93.7 M tons
Tonnes milled  ......  Subscription required  ......  Subscription required30.1 M tons29.8 M tons29.5 M tons30.6 M tons
Stripping / waste ratio  ......  Subscription required  ......  Subscription required2.7 3.4 1.5 2.4
Daily milling capacity  ......  Subscription required  ......  Subscription required85,000 tons
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGrade
Proven & Probable 564 M tons Copper 0.25 %
Proven & Probable 564 M tons Molybdenum 0.008 %
Measured 778 M tons Copper 0.25 %
Measured 778 M tons Molybdenum 0.007 %
Indicated 302 M tons Copper 0.23 %
Indicated 302 M tons Molybdenum 0.007 %
Total Resource 1,081 M tons Copper 0.25 %
Total Resource 1,081 M tons Molybdenum 0.007 %

Commodity Production Costs:

CommodityUnits202020192018201720162015
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required -0.2 / lb -0.13 / lb -0.06 / lb -0.06 / lb
Site cash costs (produced) Copper USD  ......  Subscription required  ......  Subscription required 1.8 / lb 1.22 / lb 1.58 / lb 1.65 / lb
Site cash costs (produced) Copper USD  ......  Subscription required†  ......  Subscription required† 1.6 / lb† 1.09 / lb† 1.52 / lb† 1.59 / lb†
C1 cash costs Copper USD  ......  Subscription required†  ......  Subscription required† 1.93 / lb† 1.43 / lb† 1.85 / lb† 1.96 / lb†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2020201920182017201620152014
Total operating costs ($/ton milled) CAD 9.5910.99.717.489.479.8311.4

Financials:

Units2020201920182017201620152014
Capital expenditures M CAD  ......  Subscription required  ......  Subscription required63.6  86.1   14   14.2   48.4  
Revenue M CAD  ......  Subscription required  ......  Subscription required457.6  507.21   351.82   385.73   457.26  
After-tax Income M CAD  ......  Subscription required  ......  Subscription required30.1  148.47   -18.03   -18.94   -100.1  
Subscription required - Subscription is required


Heavy Mobile Equipment as of December 31, 2019:
HME TypeSizeQuantity
Drill 12.25 inch 5
Loader (FEL) 30 cu. yd 2
Shovel (rope) 56 cu. yd 1
Shovel (rope) 58 cu. yd 2
Shovel (rope) 44 cu. yd 1
Truck (haul) 320 tons 24
Truck (haul) 240 tons 6
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
....................... Subscription required ....................... Subscription required Subscription required Feb 28, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2019
Subscription required 2016
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... 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
Subscription required - Subscription is required.

News:

NewsDate
Taseko Reports $108 Million of Adjusted EBITDA for 2020 February 24, 2021

Aerial view:

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