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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
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • 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
  • Hydraulic backfill
Production Start...
Mine Life10 years (as of Jan 1, 2018)
Trafigura Mining Group, part of Trafigura Group Pte. Ltd. acquired the Myra Falls underground Zn-Cu-Pb-Ag-Au mine in 2020 from Nyrstar N.V. Trafigura is a private multinational commodity trading company and is not required to publish compliant production or reserves figures. However, Trafigura reported continuing to ramp up to a target throughput of 800,000 tpy of ore and estimate the operation has approximately 10 years of reserves.


Owners

Source: p. 120
CompanyInterestOwnership
Myra Falls Mine Ltd. (operator) 100 % Direct
Trafigura Group Pte Ltd. 100 % Indirect

Contractors

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Deposit Type

  • VMS


Summary:

The Myra Falls orebody is a classic Volcanic Hosted Massive Sulphide (VHMS) deposit. It is a composite of sulphide lenses that were emplaced in a very dynamic, rapidly changing environment of submarine volcanism, massive debris flow, and constant tectonic activity. This active period was followed by a time of quiet, widespread sedimentation (cherts and argillites). The second cycle of volcanic activity and mineral emplacement subsequently occurred producing the Lynx-Myra-Price deposits.

Sulphide ore deposits are structurally controlled along narrow rift and trough features that have produced a system that is at least 10 km in length. The Myra ore deposits are situated in a Paleozoic group of rocks known as the Sicker Group, which comprises four main lower units that make up the stratigraphic package hosting the Price Deposit. The units that are proximal to the project area are the Price Formation, Myra Formation, Thelwood Formation, and Flower Ridge Formation. The Myra and Price Formations are unconformably overlain by the rocks of the Thelwood Formation and the Flower Ridge Formation.

The H-W Horizon (H-W Rhyolite and Sulphide Facies) and the Lynx-Myra-Price Horizon are the main oreproducing units at NMF. The HW Horizon is the oldest unit of the Myra Formation. It is predominantly a rhyolitic volcano-sedimentary package, comprising coarse volcaniclastics, sandstones, and mudstones, with massive quartz-feldspar porphyry bodies near the top of the horizon ........


Mining Methods

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


Summary:

Mining activities occur within the following areas:
- The Myra, the Lynx, the HW mining area;
- The Price mining area.

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.

A target throughput of 800,000 tpy of ore and estimate the operation has approximately 10 years of reserves. 2022 production was not meeting the 800,000 t expectation, although production was significantly higher than in 2021. After re-starting following infrastructure upgrades and closing again for compliance reasons in 2018, the mine reopened in April 2019 and have continued.


Crushing and Grinding
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Processing

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Summary:

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Production:
Myra Falls restarted zinc production during September 2018 and first shipment of zinc in concentrate took place in Q4 2018.

CommodityProductUnits201820152014
Zinc Concentrate kt 0.41751
Zinc Metal in concentrate kt 0.6927
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate kt  ......  Subscription required  ......  Subscription required
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Operational Metrics:

Metrics202220212018
Daily milling capacity  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required45 kt of ore
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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


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022
Subscription required 2017
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2019
................................... 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
Project Description 2005
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