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Canada
Macassa Mine

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 Location:
3 km W from Kirkland Lake, Ontario, Canada

  Address:
1350 Government Road West
Kirkland Lake
Ontario, Canada
P2N 3JI
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  • Overview
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  • Mining
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Mechanized Cut & Fill
  • Overhand Cut & Fill
  • Underhand Cut & Fill
  • Longhole stoping
  • Paste backfill
Production Start...
Mine Life2029
The Macassa Mine is one of the highest gold grade mines in the world.

In January 2018, Kirkland announced plans to sink a new 6,400-foot shaft with a capacity of 4,000 tpd (ore and waste) (the “#4 Shaft” project) for the Macassa mine and further to depth, away from the existing #3 Shaft.

The connection of Shaft #4 to the mine infrastructure resulted in increased ventilation in the deep mine which contributed to reducing air temperatures and improving working conditions underground. The Shaft #4 project remained on budget and on schedule with commissioning still expected in late 2022.


Owners

Source: p. 1
CompanyInterestOwnership
Agnico Eagle Mines Ltd. 100 % Direct
February 8, 2022 – Agnico Eagle Mines Limited and Kirkland Lake Gold Ltd. are pleased to announce the successful completion of the previously announced merger of equals transaction (the “Merger”).

The combined company will continue as Agnico Eagle Mines Limited.

Contractors

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Deposit Type

  • Orogenic
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The gold mineralization at Macassa is found along breaks or faults, in veins as quartz filled fractures, as breccias and as sulphide rich (pyrite) zones. There are multiple mineralized breaks, named the ‘04, ‘05, No.6, Kirkland Lake Main and the Kirkland Lake North and South branches. The breaks strike 60 degrees northeast and dip 70 to 80 degrees south in keeping with the Timiskaming trend. The trend of the gold mineralization in the Kirkland Lake camp conforms to the 60 degree westerly plunge of the syenite intrusives.

The SMC was a significant discovery, with the zone having a different character than the zones mined historically at Macassa. The SMC is associated with a cross-over structure that links the ’04 / Main Break with the Amalgamated Break. The mineralization trends parallel to the main structures but has a much flatter dip ranging from 20 to 50 degrees south. SMC mineralization has been found to have greater widths and contain higher grades than the main zones. Considerable potential exists for future exploration drilling to identify additional parallel and stacked zones located above, below and along strike of the known SMC Zone.

The gold mineralization at Macassa is located along the breaks and subordinate splays as individual fracture fill quartz veins, from several centimetres to a few meters thick. Veins may be of single, sheeted, brecciated or stacked morphology. Several generations of quartz deposition are evident from colour and text ........


Mining Methods

  • Mechanized Cut & Fill
  • Overhand Cut & Fill
  • Underhand Cut & Fill
  • Longhole stoping
  • Paste backfill


Summary:

There are three active mining areas in Macassa Mine: Main Break (MB), Lower North (LN) and New South (NS). The areas LN and NS are both part of the SMC. Access to the mining areas is through the #3 Shaft and connecting lateral development within the MB and SMC zones. The main mining methods at Macassa Mine include Underhand Cut and Fill, Longhole stoping and Mechanized Overhand Cut and Fill. The selection of mining method depends on several factors including ore geometry, grade and the need for locations to deposit waste fill. There are also several geomechanical considerations, such as structure and stresses, which impact the mining method selection.

Paste fill is the main material used to backfill stopes, although unconsolidated rockfill is also used where possible. Material hoisted to surface via #3 Shaft, which has an average capacity of 2,200 tpd.

Once the ore is hoisted to surface, it is then trucked to the crushing facilities. After crushing and grinding (95% passing, 45 microns), the ore is processed by conventional cyanide leaching with a carbon-in-pulp recovery system.

Macassa Mine has been on the forefront in the use of Battery Electric Vehicles (“BEVs”) and was the first mine in Ontario to implement BEVs as the standard for the LHD and truck fleet. Kirkland Lake Gold has partnerships with battery equipment manufacturers to develop and design BEVs, as opposed to retrofitting diesel powered equipment. Macassa Mine will continue to re ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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^ Guidance / Forecast.

Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required240194175
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required324,077 t354,469 t409,064 t
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required2,000 t2,000 t2,000 t
Daily mining capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required2,200 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required387,054 t
^ Guidance / Forecast.
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 237 kt Gold 15.3 g/t 116 koz
Probable 3,315 kt Gold 16.32 g/t 1,740 koz
Proven & Probable 3,551 kt Gold 16.26 g/t 1,856 koz
Measured 252 kt Gold 16.15 g/t 131 koz
Indicated 1,649 kt Gold 12.07 g/t 640 koz
Measured & Indicated 1,901 kt Gold 12.61 g/t 770 koz
Inferred 2,379 kt Gold 14.77 g/t 1,130 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Gold USD  ......  Subscription required
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 426 / oz   523 / oz   527 / oz  
Total cash costs Gold USD  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required ^†  ......  Subscription required†
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 713 / oz   845 / oz   907 / oz  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units20212015
Total operating costs ($/t milled) CAD 540345

Financials:

Units20202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 59.9   28.4  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 126.4   42.4   41.2  
Revenue M USD  ......  Subscription required  ......  Subscription required 307.8   247.1   213.5  
Operating Income M USD  ......  Subscription required  ......  Subscription required 145.9   90.2   77.2  
Pre-tax Income M USD 76.1  
After-tax Income M USD 57  



Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Drill jumbo (two boom) ....................... Subscription required ....................... Subscription required Feb 1, 2019
Excavator ....................... Subscription required Feb 1, 2019
Grader ....................... Subscription required ....................... Subscription required Feb 1, 2019
Jumbo ....................... Subscription required ....................... Subscription required Feb 1, 2019
Jumbo ....................... Subscription required ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) 3 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) 2 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) 3.5 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) 1.5 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) 6 cu. yd ....................... Subscription required Feb 1, 2019
Load-Haul-Dump (LHD) ....................... Subscription required 1.5 cu. yd ....................... Subscription required Feb 1, 2019
Personnel Carrier ....................... Subscription required Feb 1, 2109
Scissor Lift ....................... Subscription required Feb 1, 2019
Truck (haul) ....................... Subscription required Feb 1, 2019
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Corporate Presentation 2018
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Press Release 2018
Corporate Presentation 2017
Financial Review 2017
Management Discussion & Analysis 2017
Corporate Presentation 2016
Financial Review 2016
Management Discussion & Analysis 2016
Technical Report 2016
Annual Report 2015
Financial Review 2015
Press Release 2015
Technical Report 2015
Annual Report 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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