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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
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Overhand Cut & Fill
  • Underhand Cut & Fill
  • Longhole stoping
Processing
  • Gravity separation
  • Counter current decantation (CCD)
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life18 years (as of Jan 1, 2011)
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. There was no gold production in the second half of 2019 following a conveyor fire in March 2019. Musselwhite resumed mining activities in the third quarter of 2019 and will continue stockpiling ore mined until processing activities are restarted, which is expected in the first half of 2020.
Latest NewsNewmont Announces Musselwhite Conveyor System Achieves Commercial Production     December 2, 2020


Owners & OPERATOR

Source: p. 4
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.

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

  • Overhand Cut & Fill
  • Underhand Cut & Fill
  • Longhole stoping


Summary:


Crushing and Grinding


Processing

  • Gravity separation
  • Counter current decantation (CCD)
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The mine site consists of a potable water treatment plant, crushing plant, mill and tailings complex, tailings thickener facility, groundwater interception system, conveying system, shop/warehouse and other ancillary facilities.

The milling facility uses two-stage crushing to reduce the ore and conventional gold extraction techniques to concentrate the gold. The tailings or residue from this process is washed with incoming tailings reclaim water in thickeners to recover cyanide. Residual cyanide is treated by an INCO SO2 cyanide destruct system prior to being pumped to the tailings thickener plant (installed in 2010) which is located in the Tailings Management Area (TMA) approximately 3 km west of the plant site.

The use of cyanide begins with the grinding area, which uses re-circulated cyanide bearing solution from the counter current decantation (CCD) wash circuit as process water within the grinding mills, Knelson concentrators, Delkor linear screen and pump b ........

Recoveries & Grades:

CommodityParameter2018201720162015201420132012
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 5.966.27.177.157.385.926.03
Subscription required - Subscription is required.

Production:

CommodityUnits201920182017201620152014
Gold koz  ......  Subscription required  ......  Subscription required236261270278
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201820172016201520142013
Tonnes milled  ......  Subscription required  ......  Subscription required1,188 kt1,209,200 t1,221,200 t1,391,800 t
Daily milling capacity  ......  Subscription required  ......  Subscription required4,500 t
Daily milling rate  ......  Subscription required  ......  Subscription required3,310 t3,350 t3,810 t
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 4,900 kt Gold 6.48 g/t 1,020 koz
Probable 5,000 kt Gold 6.57 g/t 1,070 koz
Proven & Probable 9,900 kt Gold 6.52 g/t 2,090 koz
Measured 1,800 kt Gold 4.04 g/t 230 koz
Indicated 4,600 kt Gold 4.09 g/t 600 koz
Measured & Indicated 6,400 kt Gold 4.08 g/t 830 koz
Inferred 3,200 kt Gold 4.37 g/t 440 koz

Commodity Production Costs:

CommodityUnits2019201820172016201520142013
Total cash costs (sold) Gold USD  ......  Subscription required†
Total cash costs Gold USD  ......  Subscription required† 620 / oz† 538 / oz† 599 / oz† 629 / oz† 760 / oz†
All-in sustaining costs (sold) Gold USD  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required† 774 / oz† 678 / oz† 766 / oz† 811 / oz† 1,088 / oz†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2016201520142013
UG mining costs ($/t mined) USD 60.465.277.677.7
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2019201820172016201520142013
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 38   44   75  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 38  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 311   354   353  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 92   111   101  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2020
Subscription required - Subscription is required.

Staff:

EmployeesTotal WorkforceYear
Subscription required 2018
Subscription required 2017
Subscription required 2013

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Information Form 2017
Annual Report 2017
Press Release 2017
Annual Report 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
Subscription required - Subscription is required.

News:

NewsDate
Newmont Announces Musselwhite Conveyor System Achieves Commercial Production December 2, 2020

Aerial view:

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