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Canada
Musselwhite Mine

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 Location:
59 km SW from Kingfisher Lake, Ontario, Canada

  Address:
Box 7500
Thunder Bay
Ontario, Canada
P7B 6S8
Phone  ...  Subscription required
Fax+1-807-928-2067
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Avoca
  • Backfill
Production Start...
Mine Life18 years (as of Jan 1, 2011)


Owners

Source: p. 38
CompanyInterestOwnership
Newmont Corp. 100 % Indirect
Goldcorp Canada Ltd. (operator) 100 % Direct
The Musselwhite Mine (Musselwhite) is operated by Goldcorp Canada Ltd., a wholly-owned subsidiary of Goldcorp, Inc.

On April 18, 2019, Newmont Mining Corp. and Goldcorp Inc. completed their merger to form Newmont Goldcorp Corp.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Iron formation hosted


Summary:

The mineralization at Musselwhite can be classified as an Iron Formation hosted gold deposit. Typically, gold in these deposits occurs in cross-cutting quartz veins and veinlets or as fine disseminations associated with pyrite, pyrrhotite, and arsenopyrite hosted in iron formations and adjacent rocks within volcanic or sedimentary sequences (McMillan 1996).

Mesothermal veins.
Mineralization is predominantly hosted within meta-chemical sediments (banded iron formations) and in particular within garnet-magnetite-grunerite facies meta-banded iron formations (locally termed the Northern Iron Formation). The location of mineralization is controlled by the intersection of shear zones and folded meta-banded iron formations. These geological controls result in mineralized shoots, which plunge at approximately 15 degrees to grid north, have a down dip extent of up to 150 metres, down plunge continuation in excess of 1.5 kilometres, and across-lithology width of up to 10 metres. Mineralized zones are characterized by abundant pyrrhotite, quartz flooding and, rarely, visible gold.


Mining Methods

  • Avoca
  • Backfill


Summary:

Musselwhite utilizes both conventional and modified Avoca mining methods depending on the access available for that retreat. Retreats without a secondary access are mined utilizing modified Avoca. With modified Avoca, all activities are completed from the retreat drive. The fill is placed from the retreat end and therefore, once the panel has been filled there is a requirement to remove some fill (void pull) to 1. Provide void space for the next blasting cycle and 2. Prevent fill from mixing with the ore causing dilution.

With increasing depth, blast sizes have had to be reduced to control unplanned dilution.

In a set of trials at Musselwhite mine beginning in late 2016, Goldcorp tested a new mining method to reduce dilution in its production stopes with Orica’s WebGen 100 wireless detonators.

Since the case study blast, Musselwhite has implemented the TRP method in several areas of the mine where excessive dilution is being experienced.

Temporary Rib Pillar AVOCA
The Temporary Rib Pillar (TRP) mining method was developed by Orica to take advantage of fully wireless blast initiation.

With the TRP method, a temporary pillar, located at the backfill/ore interface, as well as a slot are drilled in the next panel to be mined. The entire panel is loaded in one loading operation, the TRP is primed with WebGenTM 100 and the Mass Blast is primed with i-konTM.

The Mass Blast is fired and mucked out leaving the T ........


Crushing and Grinding
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Processing

Source: Subscription required

Summary:

- subscription is required.


Production:
Gold production at Musselwhite was limited to 3,000 gold ounces since the completion of the acquisition of the Musselwhite mine site as part of the Newmont Goldcorp transaction on April 18, 2019.
There was no gold production in the second half of 2019 following a conveyor fire in March 2019.

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required205236261
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required276 k tons
Tonnes milled  ......  Subscription required  ......  Subscription required1,106 kt1,221 kt1,188 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required4,500 t4,500 t4,500 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required4,000 t
Daily milling rate  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Cut-off grade utilized in 2021 reserves not less than 3.10 gram per tonne.

CategoryTonnage CommodityGradeContained Metal
Proven 2,800 kt Gold 5.07 g/t 460 koz
Probable 6,700 kt Gold 6.07 g/t 1,310 koz
Proven & Probable 9,500 kt Gold 5.77 g/t 1,770 koz
Measured 1,400 kt Gold 3.58 g/t 160 koz
Indicated 2,300 kt Gold 3.55 g/t 270 koz
Measured & Indicated 3,700 kt Gold 3.56 g/t 430 koz
Inferred 3,200 kt Gold 4.22 g/t 440 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Gold USD  ......  Subscription required
Total cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
Total cash costs Gold USD 731 / oz†   620 / oz†   538 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD 909 / oz†   774 / oz†   678 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units20162015
UG mining costs ($/t mined) USD 60.465.2
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 84   58   37  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 32   26   29  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 263   293   321  
Operating Income M USD 69   108   118  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2021:
HME TypeSizeQuantity
Loader ....................... Subscription required
Truck (underground) 45 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 12, 2022
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required 2018
Subscription required 2017
Subscription required 2013

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Corporate Presentation 2018
Management Discussion & Analysis 2018
Other 2018
Project Description 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Annual Report 2017
Press Release 2017
Annual Report 2016
Other 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Year-end Mineral Reserves 2015
Annual Report 2013
Project Description 2013
Project Description 2011
Other 2005
Technical Report 2003
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