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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:
Goudreau Road, PO Box 456
Dubreuilville
Ontario, Canada
P0S 1B0
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Dry waste backfill
  • Paste backfill
Production Start...
Mine Life14 years (as of Jan 1, 2021)
World’s sixth highest grade gold mine.
Latest NewsAlamos Gold Reports Record Fourth Quarter 2022 Production and Provides Three-Year Production and Operating Guidance     January 12, 2023


Owners

Source: p. 16
CompanyInterestOwnership
Alamos Gold Inc. 100 % Indirect
Alamos holds 100% of all mining titles related to the Island Gold property, which comprises approximately 15,000 ha.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic


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

  • Longhole stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Dry waste backfill
  • Paste 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

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required1069983
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required380,266 t344,336 t374,962 t318,045 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required1,042 t943 t1,027 t869 t
Tonnes processed  ......  Subscription required  ......  Subscription required401,276 t369,767 t338,603 t297,757 t
Daily processing capacity  ......  Subscription required  ......  Subscription required1,200 t
Daily processing rate  ......  Subscription required  ......  Subscription required1,099 t1,013 t928 t814 t
Total tonnes mined  ......  Subscription required  ......  Subscription required650,417 t
Waste  ......  Subscription required  ......  Subscription required332,372 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves Cut-off - 2.89-4.22 g/t Au.
Mineral Resources Cut-off - 4.0 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 834 kt Gold 9.33 g/t 250 koz
Probable 3,278 kt Gold 10.33 g/t 1,088 koz
Proven & Probable 4,112 kt Gold 10.12 g/t 1,338 koz
Measured 20 kt Gold 4.92 g/t 3 koz
Indicated 1,076 kt Gold 8.18 g/t 283 koz
Measured & Indicated 1,096 kt Gold 8.12 g/t 286 koz
Inferred 7,906 kt Gold 13.59 g/t 3,454 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs (sold) Gold USD 587 / oz†  
Total cash costs (sold) Gold USD  ......  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† 781 / oz†   546 / oz†   745 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

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

Financials:

Units202220212020201920182016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.2  USD 17.2  CAD
Growth Capital M  ......  Subscription required  ......  Subscription required  ......  Subscription required 30.3  USD
Capital expenditures M  ......  Subscription required  ......  Subscription required  ......  Subscription required 66.1  USD
Revenue M  ......  Subscription required  ......  Subscription required  ......  Subscription required 135.1  USD 134.8  CAD
Operating Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required 27.2  USD
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
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsYear
Subscription required Subscription required 2020
Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 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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News:

NewsDate
Alamos Gold Reports Record Fourth Quarter 2022 Production and Provides Three-Year Production and Operating Guidance January 12, 2023

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