Lynn Lake represents a significant opportunity as one of the highest grade open pit gold deposits in Canada with excellent infrastructure already in place.


Consolidated ownership through the acquisition of Carlisle Goldfields in January 2016


Strategic, low-risk opportunity in early-stage, highly-prospective Lynn Lake Mining District


One of the highest grade open pit deposits in Canada with significant exploration potential


Existing infrastructure in place, with low cost hydroelectric power

Slide table

Lynn Lake Gold Project

Ownership 100% 
Location Manitoba, Canada
Stage Feasibility
Operation Open Pit
Commodity Gold
Mine Life Years 10.4
Average Annual Gold Production (Years 1 to 6) oz Au 170,000
Average Annual Gold Production (Years 1 to 10) oz Au 143,000
Average Mill Throughput tpd 7,000
Average Grade g/t Au
g/t Ag
Total Cash Cost1 $US/oz $645
Mine-Site All-In Sustaining Cost1 $US/oz $745
Pre-production Capex US$m $338
Total Capex US$m $486
After-Tax IRR2 % 12.5
After-Tax NPV (5%)2 US$m $123.4
Tonnes Grade Contained
(000) (G/T Au) OUNCES
Proven & Probable Reserves3 31,977 1.83 1,884,000
Measured & Indicated Resources 9,993 1.74 560,000
Inferred Resources 46,466 1.11 1,663,000

2Base Case IRR and NPV calculated assuming a $1,250/oz gold and $16.00/oz silver price

3M&I resources exclusive of Reserves

Please see 2019 year end Reserves and Resources statement for additional detail.


The 100% owned Lynn Lake gold project is a highly prospective past-producing gold camp consisting of five near surface deposits with significant existing infrastructure. The Lynn Lake project consists of two primary deposits; the MacLellan Mine and the Gordon Mine, which were the subject of a positive Feasibility Study was published in December 2017.


The Lynn Lake project is located in Lynn Lake, Manitoba, Canada.


In November, 2014, AuRico Gold entered into a joint venture agreement with Carlisle Goldfields, acquiring a 25% interest in the Lynn Lake project for an initial cash contribution of C$5 million, with the option to earn up to a 60% interest by funding C$20 million on the Project over a three-year period and delivering a feasibility study. Alamos Gold merged with AuRico Gold in 2015 and in January 2016, Alamos consolidated full ownership of Lynn Lake through its acquisition of Carlisle Goldfields. Alamos published a positive Feasibility Study on the project in December 2017.


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 balaltic unit. Both 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 Farley Lake area is 6 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 deposit is thought to be an epigenetic iron-formation hosted gold deposit.



Both the Gordon and MacLellan deposits will be developed using conventional shovel/truck open pit mining methods with owner mining assumed within the Feasibility Study. The Gordon and MacLellan deposits are expected to operate concurrently for the first six years of operation, with Gordon to be depleted first given its higher grades and lower stripping ratio. As the Gordon pit nears depletion, mining equipment will be transferred to MacLellan and utilized over the remainder of its mine life.

Following a one year pre-production period at Gordon and two-year pre-production period at MacLellan, combined mining rates are expected to range between 20.5 and 27.0 Mt of material per year over the first seven years. This includes peak mining rates of 13 Mt at Gordon and 24.7 Mt at MacLellan.

Loading of ore and waste rock is planned to be carried out with two 300 t class hydraulic shovels and two front end loaders, paired primarily with 144 t capacity mine trucks. Ore from MacLellan will be hauled to the primary crusher (located to the south of the pit). All ore from Gordon will be transported approximately 55 km to the process facility at MacLellan via a fleet of 23 highway trucks, each with a capacity of approximately 30 t.

Processing, Metallurgy and Infrastructure

Lynn Lake’s process plant has been designed as a conventional milling operation with a nominal capacity of 7,000 tpd. The proposed plant design is based on leach/carbon in pulp (“CIP”), and will consist of crushing, grinding, thickening, pre-aeration and leaching, CIP, cyanide detoxification, carbon elution and regeneration, and gold smelting.

Based on test work, gold recoveries from Gordon are expected to average 92.9% and gold and silver recoveries from MacLellan are expected to average 91.4% and 49%, respectively. Over the life of mine, combined gold recoveries are expected to average 92.0%.

Power to the MacLellan site, which will host all the process facilities and major infrastructure, will be supplied from Manitoba Hydro through the commercial electricity grid. The existing power line to the Town of Lynn Lake will be modified from 69kV to 138 kV, and a 7 km 138kV overhead line will be built to the MacLellan site.

The Gordon site’s electrical demands will be met by two 300 kW diesel generators in duty/standby configuration.

The tailings management facility (“TMF”) will be constructed approximately 3 km northeast of the planned open pit and plant site at MacLellan. Additional dam raises are planned for years two, six and nine to accommodate the life of the mining operation. The majority of operational water required for the process plant will be reclaimed from the TMF.

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Reconciliation of non-GAAP and additional GAAP measures

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No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein. Certain statements in this website are “forward-looking statements”, including within the meaning of the United States Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact included in this website, including without limitation statements regarding forecast gold production, gold grades, recoveries, waste-to-ore ratios, total cash costs, potential mineralization and reserves, exploration results, and future plans and objectives of Alamos, are forward-looking statements based on forecasts of future operational or financial results, estimates of amounts not yet determinable and assumptions of management that involve various risks and uncertainties. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as “expects” or “does not expect”, “is expected”, “anticipates” or “does not anticipate”, “plans”, “estimates” or “intends”, or stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved) are not statements of historical fact and may be “forward-looking statements.” Alamos cautions that forward-looking information involves known and unknown risks, uncertainties and other factors that may cause Alamos' actual results, performance or achievements to be materially different from those expressed or implied by such information, including, but not limited to, gold and silver price volatility; fluctuations in foreign exchange rates and interest rates; the impact of any hedging activities; discrepancies between actual and estimated production, between actual and estimated reserves and resources or between actual and estimated metallurgical recoveries; costs of production; capital expenditure requirements; the costs and timing of construction and development of new deposits; and the success of exploration and permitting activities. In addition, the factors described or referred to in the section entitled “Risk Factors” in both Alamos Gold Inc.’s Annual Information Form for the year ended December 31, 2014 and the Annual Information Form for the year ended December 31, 2014 of AuRico Gold Inc., (each a predecessor to Alamos Gold Inc.), along with each of these entities’ subsequent public filings available on the SEDAR website at, should be reviewed in conjunction with the information found in this website. Although Alamos has attempted to identify important factors that could cause actual results, performance or achievements to differ materially from those contained in forward-looking information, there can be other factors that cause results, performance or achievements not to be as anticipated, estimated or intended. There can be no assurance that such information will prove to be accurate or that management’s expectations or estimates of future developments, circumstances or results will materialize. Accordingly, readers should not place undue reliance on forward-looking information.

Note to U.S. Investors

Alamos prepares its disclosure in accordance with the requirements of securities laws in effect in Canada, which differ from the requirements of U.S. securities laws. Terms relating to mineral resources in this website are defined in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects under the guidelines set out in the Canadian Institute of Mining, Metallurgy, and Petroleum Standards on Mineral Resources and Mineral Reserves. The United States Securities and Exchange Commission (the “SEC”) permits mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. Alamos may use certain terms, such as “measured mineral resources”, “indicated mineral resources”, “inferred mineral resources” and “probable mineral reserves” that the SEC does not recognize (these terms may be used in this website and are included in the public filings of Alamos, which have been filed with the SEC and the securities commissions or similar authorities in Canada).

Cautionary non-GAAP Measures and Additional GAAP Measures

Note that for purposes of this section, GAAP refers to IFRS. The Company believes that investors use certain non-GAAP and additional GAAP measures as indicators to assess gold mining companies. They are intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared with GAAP.
Additional GAAP measures that are presented on the face of the Company’s consolidated statements of comprehensive income include “Mine operating costs”, “Earnings from mine operations” and “Earnings from operations”. These measures are intended to provide an indication of the Company’s mine and operating performance. “Cash flow from operating activities before changes in non-cash working capital” is a non-GAAP performance measure that could provide an indication of the Company’s ability to generate cash flows from operations, and is calculated by adding back the change in non-cash working capital to “Cash provided by (used in) operating activities” as presented on the Company’s consolidated statements of cash flows. “Free cash flow” is a non-GAAP performance measure that is calculated as cash flows from operations net of cash flows invested in mineral property, plant and equipment and exploration and evaluation assets as presented on the Company’s consolidated statements of cash flows and that would provide an indication of the Company’s ability to generate cash flows from its mineral projects. Return on Equity is defined as Earnings from Continuing Operations divided by the average Total Equity for the current and previous year. “Mining cost per tonne of ore” and “Cost per tonne of ore” are non-GAAP performance measures that could provide an indication of the mining and processing efficiency and effectiveness of the mine. These measures are calculated by dividing the relevant mining and processing costs and total costs by the tonnes of ore processed in the period. “Cost per tonne of ore” is usually affected by operating efficiencies and waste-to-ore ratios in the period. “Cash operating costs per ounce”, “total cash costs per ounce” and “all-in sustaining costs per ounce” as used in this analysis are non-GAAP terms typically used by gold mining companies to assess the level of gross margin available to the Company by subtracting these costs from the unit price realized during the period. These non-GAAP terms are also used to assess the ability of a mining company to generate cash flow from operations. There may be some variation in the method of computation of these metrics as determined by the Company compared with other mining companies. In this context, “cash operating costs per ounce” reflects the cash operating costs allocated from in-process and dore inventory associated with ounces of gold sold in the period. “Cash operating costs per ounce” may vary from one period to another due to operating efficiencies, waste-to-ore ratios, grade of ore processed and gold recovery rates in the period. “Total cash costs per ounce” includes “cash operating costs per ounce” plus applicable royalties. Cash operating costs per ounce and total cash costs per ounce are exclusive of exploration costs. “All-in sustaining costs per ounce” include total cash costs, exploration, corporate and administrative, share based compensation and sustaining capital costs. Non-GAAP and additional GAAP measures do not have a standardized meaning prescribed under IFRS and therefore may not be comparable to similar measures presented by other companies. For a reconciliation of non-GAAP and GAAP measures, please refer to Alamos’ Managements’ Discussion and Analysis as presented on SEDAR and the Company’s website.

Technical Information

Except as otherwise noted herein, Chris Bostwick, FAusIMM, Alamos Gold’s Vice President, Technical Services, has reviewed and approved the scientific and technical information contained in this website. Chris Bostwick is a Qualified Person within the meaning of Canadian Securities Administrator’s National Instrument 43-101. For more information, please refer to the Alamos Gold Inc. and AuRico Gold Inc. 2014 Annual Information Forms and the technical reports referenced therein and in this website, available on SEDAR (