Lynn Lake Project Canada

Home Operations Development Projects Lynn Lake, Canada

Quick Facts

Ownership 100%
Location Manitoba, Canada
Status Permitting
Operation Open Pit, Milling
Commodity Gold

Lynn Lake is one of the highest-grade open pit gold deposits in Canada. With its low costs and excellent infrastructure already in place, the project represents a significant opportunity to drive the future growth of our business in Canada.

Feasibility Study Highlights - 2023

Average Annual Production1

oz Au (thousands)

176

Total cash cost1,2

US$/oz

$603

Mine-Site All-in Sustaining Costs2

US$/oz

$699

1 Average annual gold production, total cash cost, mine-site all-in sustaining costs for initial 10 years.
2 Please refer to Cautionary Notes on non-GAAP Measures and Additional GAAP Measures.

Mineral Reserves and Resources

as of December 31, 20231

Proven and Probable
Mineral Reserves

000 oz Au

2,332

Measured and Indicated
Mineral Resources

000 oz Au

345

Inferred
Mineral Resources

000 oz Au

1,699

1 M&I Mineral Resources exclusive of Mineral Reserves. Please see 2023 year end Mineral Reserves and Resources statement for additional detail.

Lynn Lake Mine Map Larger

The Lynn Lake project is located in northern Manitoba and consists of two primary sites, MacLellan and Gordon, which are just east of the Town of Lynn Lake.

The Lynn Lake project is a strategic, lower-risk opportunity in a past-producing gold camp. It consists of five near surface deposits and has significant existing infrastructure. Its two primary deposits are MacLellan and Gordon, which were the subject of a positive feasibility study published in August 2023. The study outlines average annual production of 176,000 ounces over the initial 10-year mine life at mine-site all-in sustaining costs of $699 per ounce. On March 6, 2023 Alamos announced that the Environmental Impact Assessment (EIS) for the Lynn Lake Gold Project had been completed and a positive Decision Statement had been issued by the Minister of Environment and Climate Change Canada. As well, in accordance with the Environment Act, the Province of Manitoba issued Environment Act Licenses for the MacLellan and Gordon sites.

AuRico Gold acquired a 25% interest in the Lynn Lake project in 2014 by entering into a joint venture agreement with Carlisle Goldfields. The agreement provided AuRico with an option to earn up to a 60% interest by continuing to fund the project and delivering a feasibility study. Following Alamos Gold’s merger with AuRico Gold in 2015, Alamos acquired Carlisle Goldfields, consolidating full ownership of Lynn Lake. A positive feasibility study was completed on the project in December 2017, and in August 2023, the results of an updated Feasibility Study were announced, outlining a larger, longer-life, low-cost operation.

The project is situated in the North belt of the Lynn Lake Greenstone Belt within the Churchill Structural Province of the Canadian Shield. The North belt is a north-facing homocline and consists of rhyolites, overlain by andesite and basalt, sedimentary rocks and an upper basaltic unit. Both the MacLellan and Gordon deposits are located within this belt, which has been termed the “Rainbow Trend”.

MacLellan mine project: The mineralized system is hosted within a unique stratigraphic sequence known as the Agassiz Metallotect within the Wasekwan Group rocks of the North belt. The Agassiz Metallotect comprises interlayered siltstones, basalts, iron formations and minor felsic volcanics. The MacLellan mine is hosted by an interbedded sequence of biotite-rich to siliceous siltstone and high magnesium basaltic flows and minor tuffs. Overlying and underlying this mine sequence are massive and fragmental mafic volcanic rocks. The mine is subdivided longitudinally into three mineralized deposits, from west to east they are the Rainbow-Dot deposit, the MacLellan deposit and the Nisku deposit. All of these deposits are located south of a major east-west trending fault structure known as the North Shear Zone.

Gordon mine project: The deposit is hosted in a Pre-Cambrian sedimentary iron formation. The iron formation in the Gordon area is six kilometres long by 600 metres wide and is predominantly composed of an oxide facies iron formation that is intercalated with clastic sediments. Mineralization is in discordant sulphide lenses within silicified, chloritized and sulphidized oxide facies iron formation.

The Gordon and MacLellan deposits will be developed using conventional truck and shovel open pit mining methods. They are expected to operate concurrently for the first five years of operation, with Gordon being depleted first given its higher grades. As the Gordon pit nears depletion, mining equipment will be transferred to MacLellan and utilized over the remainder of its mine life. Following pre-production periods, combined mining rates are expected to range between 36 and 49 Mt per year over the first five years.

Lynn Lake’s proposed process plant will be a conventional milling and leaching/carbon-in-pulp (“CIP”) operation with a 8,000 tpd capacity. It will consist of crushing, grinding, thickening, pre-aeration and leaching, CIP, cyanide detoxification, carbon elution and regeneration, and gold smelting. Low-cost hydroelectric power will be supplied by Manitoba Hydro. Over the life of mine, combined gold recoveries are expected to average 93.7%. A tailings management facility will be constructed approximately 2 kilometres northeast of the planned open pit and plant site at MacLellan.