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Canada
Island Gold Mine (Island Gold Expansion Project)

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 Location:
10 km SE from Dubreuilville, Ontario, Canada
  Address:
15 Goudreau Road
Dubreuilville
Ontario, Canada
P0S 1B0
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longitudinal open stoping
  • Longhole open stoping
  • Transverse open stoping
  • Cemented backfill
  • Dry waste backfill
Production Start...
Mine Life17 years (as of Jan 1, 2022)
Island Gold is one of Canada’s highest grade and lowest cost gold mines.

On June 28, 2022, the Company reported results of the P3+ Expansion Study conducted on its Island Gold Mine, located in Ontario, Canada. Based on the results of the P3+ Expansion Study, the Company is proceeding with an expansion of the operation to 2,400 tpd.

Owners

Source: p. 12
CompanyInterestOwnership
Alamos Gold Inc. (operator) 100 % Indirect
Alamos owns and operates the Island Gold mine.

Contractors

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Deposit Type

  • Vein / narrow vein

Summary:

The Island Gold Property is located in the Michipicoten Greenstone Belt (“MGB”) which is part of the Wawa Subprovince within the Archaean Superior Province.

A major regional deformation zone called the Goudreau Lake Deformation Zone (“GLDZ”) is situated throughout the area at the interface of the Wawa and Catfish Assemblage cycles. It is a north-easterly trending structure which has been traced along strike for 30 km with a width of 4.5 km and believed to be the main control of gold mineralization for the Project area. It is a high angle oblique-slip fault zone with an overall dextral movement cutting stratigraphy at a shallow angle.

There are three main splays to the GLDZ in the area, the southernmost of which hosts the Island Gold Mine structure which contains a stacked sequence of east-northeast striking, steeply dipping, and subparallel zones of gold mineralization.

The Island Gold Mine is an Archean orogenic lode gold deposit. It is a structurally hosted quartz-carbonate vein system situated within the Goudreau Lake Deformation Zone (“GLDZ”), a major regional brittle-ductile structure. The host terrane is a sequence of felsic to intermediate volcanic rocks of the Wawa Assemblage which are in the greenschist metamorphic range as is common for this type of deposit. High strain zones associated with the GLDZ have the tendency to develop at variable scales along lithologic unit contacts where complex geology and related competency contrasts c ........

Mining Methods

  • Longitudinal open stoping
  • Longhole open stoping
  • Transverse open stoping
  • Cemented backfill
  • Dry waste backfill

Summary:

The Island Gold deposit is accessed via a single decline from surface down to the 425 Level, at which point multiple ramps are utilized to access the main IG, IG West, Extension and East zones. These ramps are also connected at numerous points throughout the mine allowing for easy travel between mining zones.

The LOM plan includes the addition of a mine shaft which will be constructed between 2021 and 2025. Once commissioned, the shaft will be utilized to hoist ore and waste from the 1305 Level to surface. Additionally, the shaft will used to transport personnel and materials to any of the three shaft stations. From the shaft collar location ore and waste will be trucked to either the mill or the surface waste stockpile.

Level accesses are typically developed at 20 m intervals (floor to floor) and are designed south of internal ramps providing access to the footwall of the deposit. Once the ore is reached, sills are developed along the ore contact, with their direction controlled by geology. Sill development is used as a drilling, mucking and backfilling platform for stope extraction. On some levels, additional footwall and cross-cut development is required when the width of the mineralization exceeds 10 metres.

The mining method for a particular stope is selected based on a variety of factors such as overall geometry of the mineralization, width of the ore zone, local stresses, mapping and geotechnical data, spatial location of the stope, and ........

Crushing and Grinding
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Processing

Source: Subscription required

Summary:

- subscription is required.

Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required10699
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required380,266 t344,336 t374,962 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required1,042 t943 t1,027 t
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required401,276 t369,767 t338,603 t
Daily processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,200 t
Daily processing rate  ......  Subscription required  ......  Subscription required  ......  Subscription required1,099 t1,013 t928 t
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2022:
Mineral Reserves Cut-off - 2.67-3.85 g/t Au.
Mineral Resources Cut-off - 4.0 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 833 kt Gold 8.92 g/t 239 koz
Probable 3,393 kt Gold 11.24 g/t 1,225 koz
Proven & Probable 4,225 kt Gold 10.78 g/t 1,464 koz
Measured 21 kt Gold 4.93 g/t 3 koz
Indicated 1,255 kt Gold 7.13 g/t 288 koz
Measured & Indicated 1,276 kt Gold 7.09 g/t 291 koz
Inferred 8,066 kt Gold 13.61 g/t 3,529 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs (sold) Gold USD
Total cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 589 / oz†   401 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 781 / oz†   546 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2017
UG mining costs ($/t milled) USD 95

Financials:

Units2023202220212020201920182016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.2  USD 17.2  CAD
Growth Capital M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 30.3  USD
Capital expenditures M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 66.1  USD
Revenue M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 135.1  USD 134.8  CAD
Operating Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 27.2  USD
Operating Cash Flow M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 75.9  USD
Subscription required - Subscription is required

Water Supply
Source: Subscription required

- subscription is required.

Heavy Mobile Equipment as of June 28, 2022:
HME TypeSizeQuantity
Deck & Boom Trucks ....................... Subscription required
Excavator ....................... Subscription required
Grader ....................... Subscription required
Jumbo ....................... Subscription required
Loader ....................... Subscription required
Load-Haul-Dump (LHD) 6 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) 3.5 cu. yd ....................... Subscription required
Personnel Carrier ....................... Subscription required
Scissor Lift ....................... Subscription required
Truck (fuel / lube) ....................... Subscription required
Truck (underground) 30 t ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 26, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required 2018
Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Information Form 2022
Corporate Presentation 2022
Corporate Presentation 2022
Management Discussion & Analysis 2022
Pre-Feasibility Study Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Year-end Mineral Reserves 2018
Corporate Presentation 2017
Management Discussion & Analysis 2017
Press Release 2017
Press Release 2017
Year-end Mineral Reserves 2017
Corporate Presentation 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Management Discussion & Analysis 2015
Preliminary Economic Assessment 2015
Annual Information Form 2014
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