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Canada
Myra Falls Mine

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 Location:
45 km W from Courtenay, British Columbia, Canada

  Address:
P.O. Box 8000
Campbell River
British Columbia, Canada
V9W 5E2
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Drift & Fill
  • Sub-level stoping
Processing
  • Gravity separation
  • Flotation
Mine Life10 years (as of Jan 1, 2018)
Following the restart, at the end of Q4 2018 Nyrstar was required to suspend ore extraction and production at the mill to address deficiencies identified in compliance orders from the Ministry for Energy, Mines & Petroleum Resources in British Columbia. Nyrstar is currently working to address the necessary repairs and production should resume by the end of Q1 2019 or during Q2 2019 at the latest. In the meantime, Nyrstar is continuing with its underground development and remediation activities at the Myra Falls mine.

Publication of the Half Year Results 2019 are now being rescheduled to Friday 29 November 2019


Owners & OPERATOR

Source:
CompanyInterestOwnership
Nyrstar 100 % Indirect
Nyrstar Myra Falls Ltd. (operator) 100 % Direct
Trafigura Group Pte Ltd. (“Trafigura”), a market leader in the global commodities industry, has today become the majority owner of the operating business of Nyrstar, a global multi-metals business.

Deposit Type

  • VMS


Summary:

Myra Falls zinccopper-gold (lead-silver) mineral deposits are comprised of complex metal-zoned Volcanic Hosted Massive Sulphide deposits. The principal sulphide minerals are sphalerite, pyrite and chalcopyrite with minor galena, bornite, and tennantite. Myra Falls mine produces copper, lead, zinc, and gold concentrates with silver in concentrate. There is strong geological continuity of the mineralization as demonstrated in the extensive diamond drilling and underground development.


Mining Methods

  • Cut & Fill
  • Drift & Fill
  • Sub-level stoping


Summary:

Current underground mining methods utilized at Myra Falls depend on orebody geometry and include drift and fill, cut and fill, drift, and sublevel longhole open stoping. Some surface mining is still conducted within the Lynx open pit. Hydraulic backfilling uses pyritic mill cycloned tailings. Approximately 55% of the tailings are pumped underground for this purpose.


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation

Source: Subscription required

Summary:

The mill and concentrator have a capacity of 1.4 M tonnes per year. At surface, the muck is transported by a 1.4 km long conveyor belt. This belt discharges into a 3,600 tonne coarse ore bin at the concentrator. Secondary and tertiary cone crushing and screening reduces the mill feed to less than 16 mm x 28 mm size. Two 3,500 tonne fine ore bins receive this crushed material.

The concentrator has two parallel grinding and rougher circuits, each capable of treating 2,000 tonnes per day. Rod mill discharge is pumped to a pair of Krebs D20LB cyclones. Cyclone underflow is ball mill feed and is 80% to 85% solids. Product from the grinding circuit is 75% to 80% passing –200 mesh. Cyclone underflow is then passed through a Knelson gold concentrator that recovers coarse free gold. Gold and silver recoveries are about 53% and 77% respectively.

The resultant mill slurry is then processed first by two Cu rougher flotation circuits producing a Cu final concentrate which repo ........

Recoveries & Grades:

CommodityParameter2018201520142013
Zinc Recovery Rate, %  ......  Subscription required89.789.188.6
Zinc Head Grade, %  ......  Subscription required6.916.435.91
Lead Recovery Rate, %  ......  Subscription required23.544.333.9
Lead Head Grade, %  ......  Subscription required0.470.720.54
Copper Recovery Rate, %  ......  Subscription required63.170.870.8
Copper Head Grade, %  ......  Subscription required0.690.70.88
Silver Recovery Rate, %  ......  Subscription required85.982.584
Silver Head Grade, g/t  ......  Subscription required51.99557.9
Gold Recovery Rate, %  ......  Subscription required69.577.269.3
Gold Head Grade, g/t  ......  Subscription required1.242.041.53
Zinc Concentrate Grade, %  ......  Subscription required52.952.952.9
Lead Concentrate Grade, %  ......  Subscription required4032.631
Copper Concentrate Grade, %  ......  Subscription required22.222.123.4

Production:

CommodityProductUnits2018201520142013
Zinc Concentrate kt 0.4175151
Zinc Metal in concentrate kt 0.692727
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics2018201520142013
Tonnes milled  ......  Subscription required145 kt of ore466 kt of ore523 kt of ore
Subscription required - Subscription is required.

Reserves at December 31, 2018:

CategoryTonnage CommodityGrade
Proven 4.11 Mt Zinc 6.94 %
Proven 4.11 Mt Lead 0.75 %
Proven 4.11 Mt Copper 0.93 %
Proven 4.11 Mt Silver 72.56 g/t
Proven 4.11 Mt Gold 1.71 g/t
Probable 0.59 Mt Zinc 8.26 %
Probable 0.59 Mt Lead 0.94 %
Probable 0.59 Mt Copper 0.78 %
Probable 0.59 Mt Silver 104.48 g/t
Probable 0.59 Mt Gold 2.32 g/t
Proven & Probable 4.7 Mt Zinc 7.11 %
Proven & Probable 4.7 Mt Lead 0.78 %
Proven & Probable 4.7 Mt Copper 0.92 %
Proven & Probable 4.7 Mt Silver 76.55 g/t
Proven & Probable 4.7 Mt Gold 1.78 g/t
Measured 6.74 Mt Zinc 6.4 %
Measured 6.74 Mt Lead 0.69 %
Measured 6.74 Mt Copper 0.98 %
Measured 6.74 Mt Silver 68.5 g/t
Measured 6.74 Mt Gold 1.7 g/t
Indicated 0.89 Mt Zinc 7.98 %
Indicated 0.89 Mt Lead 0.91 %
Indicated 0.89 Mt Copper 1.11 %
Indicated 0.89 Mt Silver 102.82 g/t
Indicated 0.89 Mt Gold 2.45 g/t
Measured & Indicated 7.64 Mt Zinc 6.59 %
Measured & Indicated 7.64 Mt Lead 0.72 %
Measured & Indicated 7.64 Mt Copper 0.99 %
Measured & Indicated 7.64 Mt Silver 72.52 g/t
Measured & Indicated 7.64 Mt Gold 1.79 g/t
Inferred 0.87 Mt Zinc 9.45 %
Inferred 0.87 Mt Lead 1.05 %
Inferred 0.87 Mt Copper 0.81 %
Inferred 0.87 Mt Silver 136.52 g/t
Inferred 0.87 Mt Gold 2.87 g/t

Operating Costs:

Units20142013
Direct operating costs ($/t milled) USD 163137


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 19, 2020
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2017
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Annual Report 2018
Fact Sheet 2018
Press Release 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Fact Sheet 2017
Technical Report 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2016
Annual Report 2015
Press Release 2015
Annual Report 2014
Year-end Mineral Reserves 2014
Other 2005
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Aerial view:

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