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Canada
Northern Dancer Project

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 Location:
64 km E from Teslin, Yukon, Canada

  Project Contacts:
55 University Avenue, Suite 1105
Toronto
Ontario, Canada
M5J 2H7
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusInactive / Suspended
Mine TypeOpen Pit
Commodities
  • Molybdenum
  • Tungsten
Mining Method
  • Truck & Shovel / Loader
In the fourth quarter 2015, Largo ceased all activities at Northern Dancer and placed it on care and maintenance.

Management is not conducting any further work at this time on the Northern Dancer property, as the majority of the Company’s efforts are focused on the Maracás Menchen Mine. During 2022, the Company addressed the outstanding Inspector’s Direction for reclamation work with respect to historic drill roads and drill sites on the property. Due to COVID-19 restrictions for travel and work as defined by the Yukon Territory government, the time frame to complete this work was extended to July 1, 2022. The Company initiated a small work program to bring the Company into full compliance with the conditions of the Quartz Mining Act (Yukon) and the Quartz Mining Land Use Regulations. Subsequent to the completion of the work program, the Company received notification that it had met all provisions of the operating plan and successfully resolved all outstanding concerns. The Company


Owners

Source: p. 11
CompanyInterestOwnership
Largo Inc. 100 % Indirect
Largo Resources (Yukon) Ltd. 100 % Direct
Northern Dancer project is 100% Owned by Largo Resources Ltd. through its wholly owned subsidiary Largo Resources (Yukon) Ltd.

Contractors

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Deposit Type

  • Porphyry
  • Vein / narrow vein
  • Hydrothermal


Summary:

The Northern Dancer deposit is a porphyry tungsten-molybdenum system (e.g., Kirkham and Sinclair, 1984; Sinclair, 1995). Deposits of this type comprise large tonnage, generally low grade, hydrothermal mineralization related to igneous intrusions emplaced at high levels in the earth’s crust. The mineralization may be confined to pluton-hosted disseminations, veins and veinlets in stockworks, vein sets, and breccias and occur in skarn, replacement, vein and disseminated deposits peripheral to plutons. Deposits of this type are amongst the world’s largest, including copper, molybdenum, uranium, tungsten, gold, silver, and tin. Porphyry molybdenum deposits are common in the northern Cordillera, with examples including: Quartz Hill, Endako, Red Mountain, Adanac, Trout Lake, Henderson, and Climax.

Previous work in the vicinity of the claims has outlined an extensive, multi-episode vein system that is enriched in several metals, most notably tungsten and molybdenum (Noble et al., 1984; Wengzynowski, 2006). Readers interested in a more detailed description of the vein system are referred to Chapter 4 of Brand (2008). The system is centred on a porphyry dyke complex and appears to form an approximately 3 km by 1 km kidney-shaped zone that is elongated along a north-north-easterly axis.

Most of the mineralization (approximately 95%) within the system occurs in veins and fractures. In addition, minor molybdenite is disseminated in the porphyry complex, some tungst ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Northern Dancer deposit will be mined using open pit mining methods.

The selected mining operating rate is 30 Mt/a to supply the processing plant with 11.2 Mt/a of ore. The total Life of Mine (LOM) waste to mineralized material ratio is 0.15t of waste per 1t of ore produced.

The operation is amenable to conventional truck and shovel/front end loader mining, with blasting as required. The initial primary equipment fleet for the study consists of four 229 mm blasthole capable drill rigs, two 12 m3 diesel hydraulic face shovels, one 11 m3 front end loader and fourteen 100 t haul trucks. In addition, the primary fleet is supported by track dozers, motor graders, water trucks and other suitably sized ancillary equipment.

In general, both the face shovels and loader would be used to mine in bulk ore and waste on a 10 m bench. Use of a wheel loader allows some flexibility in mining locations for blending and ore supply purposes. The wheel loader may also be used for rehandle of mineralized material on the ROM.

The mining schedule has been based on a five phase approach. Three grade bands based on Net Smelter Return (NSR) have been used in the schedule: High Grade, Medium Grade and Low Grade. The mining sequence has been set to preferentially mine and treat High Grade material early in the mine life to improve the project Net Present Value (NPV). Medium and Low Grade materials are stockpiled for rehandle and processing later in the mine li ........


Crushing and Grinding


Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. Annual
Molybdenum Metal in concentrate M lbs 5.5
WO3 Crystals mtu  ......  Subscription required

* According to 2011 study.

Reserves at December 31, 2016:

CategoryTonnage CommodityGradeContained Metal
Measured 30.8 Mt Molybdenum 0.03 % 20.1 M lbs
Measured 30.8 Mt WO3 0.114 % 77.3 M lbs
Indicated 192.6 Mt Molybdenum 0.029 % 123.7 M lbs
Indicated 192.6 Mt WO3 0.1 % 422.8 M lbs
Measured & Indicated 223.4 Mt Molybdenum 0.029 % 143.9 M lbs
Measured & Indicated 223.4 Mt WO3 0.102 % 500.1 M lbs
Inferred 201.2 Mt Molybdenum 0.024 % 107.7 M lbs
Inferred 201.2 Mt WO3 0.089 % 393.1 M lbs

Commodity Production Costs:

CommodityUnits2022
Assumed price WO3 USD 275 / mtu *  USD
Assumed price Molybdenum USD 16 / lb *  USD
* According to 2011 study / presentation.
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2011 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of March 28, 2011:
HME TypeModelQuantity
Dozer ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
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Corporate Filings & Presentations:

DocumentYear
Management Discussion & Analysis 2022
................................... Subscription required 2021
Annual Information Form 2016
Financial Review 2016
Management Discussion & Analysis 2016
Preliminary Economic Assessment 2011
Subscription required - Subscription is required.

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