• Operations

Björkdal Mine

Property at a Glance

Location
Skellefteå, Sweden
Land Package
12,949 hectares
Mining Method
Long-hole stoping
Product
Gold (gravity and flotation)
2021 Production
45,236 Gold oz
Life of Mine
10+ years
Processing Capacity
1.3 million tonnes per annum

2022 Outlook

Production
Gold (oz)
51,000 – 56,000
Antimony (t)
-
Gold Equivalent (oz)(1)
51,000 – 56,000
Cash Costs ($USD/oz)(2)
$980 – $1,130
All-in sustaining Costs ($USD/oz)(2,3)
$1,400 – $1,550
Capital Expenditures ($USDM)(4)
$29M – $33M
  • Notes
    • Assumes metal prices of: $1,860/oz, Sb $6,000/t. 
    • Cash and all-in sustaining costs are a non-IFRS measure
    • Capital expenditures includes exploration

2021 Performance

PRODUCTION
Gold (oz)
45,236
Cash Costs ($USD/oz)
-
All-in sustaining cost ($USD/oz)
-
Capital Expenditures ($USDM)
-
  • Notes
    • Björkdal Mineral Reserves are estimated using drill hole and sample data as of September 30, 2021 and depleted for production through December 31st , 2021.
    • Norrberget Mineral Reserves are based on a data cut-off date of September 30th, 2017.
    • CIM definitions (2014) were followed for Mineral Reserves.
    • Open Pit Mineral Reserves are based on mine designs carried out on an updated resource model, applying a block dilutionof 100% at 0.0 g/t Au for blocks above 1.0 g/t and 100 % at in-situ grade for blocks below 1.0 g/t, but above a cut-off grade of 0.37 g/t Au. The application of these block dilution factors is based on historical reconciliation data. A marginal cut-off grade of 0.37 g/t Au was applied to estimate open pit Mineral Reserves. 
    • Underground Mineral Reserves are based on mine designs carried out on an updated resource model. Minimum mining widths of 3.7 m for stopes (after dilution) and 4.75 m for development (after dilution) were used. Stope dilution was applied by adding 0.6 m on each side of stopes as well as an additional 10% over break dilution. Further dilution, ranging from 5% to 50%, was added on a stope-by-stope basis depending on their proximity to other stopes. An overall dilution factor of 25% was added to development designs. Mining extraction was assessed at 95% for contained ounces within stopes and 100% for development. A cut-off grade of 0.88 g/t Au was applied to material mined within stopes. An 8 incremental cut-off grade of 0.37 g/t Au was used for development material.
    • Stockpile Mineral Reserves are estimated at a cut-off grade of 0.37 g/t Au and are based upon surveyed volumes supplemented by production data. 
    • Mineral Reserves are estimated using an average long-term Au price of US$1,500/oz, for Bjorkdal, US$1,300/oz for Norrberget, and an exchange rate of 9.0 SEK/US$.
    • Tonnes and contained Au are rounded to the nearest thousand. 
    • Totals may not sum due to rounding. 
    • The Mineral Reserve Estimate as of 31st December, 2021 for Björkdal was independently verified by Aaron Spong FAusIMM CP (Min) who is a full time employee of Mining Plus. Mr Spong fulfils the requirements to be a "Qualified Person" for the purposes of NI 43-101, and is the Qualified Person under NI 43-101 for the Mineral Reserve.. The Independent Qualified Person for the Norrberget Mineral Reserve estimate is Rick Taylor, MAusIMM (CP), Principal Mining Engineer with SLR, who is a Qualified Person as defined by NI 43-101.
  • Notes
    • The Björkdal Mineral Resource is estimated using drill hole and sample data as of September 30, 2021 and depleted for production through December 31st  , 2021. Norrberget Mineral Resources are based on a data cut-off date of September 30th, 2017. 
    • CIM definitions (2014) were followed for the Mineral Resource.
    • The Mineral Resource is inclusive of the Mineral Reserve.
    • The Mineral Resource is estimated using an average Au price of $1,700/oz. and an exchange rate of 9.0 SEK/US$.
    • In situ bulk density is 2.74 t/m3 for veins and host rock. In situ bulk density is 2.92 t/m3 for skarn ore bodies. Stockpile bulk density is 1.8 t/m3.
    • High Au assays were capped at 60 g/t Au for the first search pass and 40 g/t Au for subsequent passes.
    • High Au assays at Norrberget were capped at 24 g/t Au.
    • Interpolation was by inverse distance cubed utilizing diamond drill, reverse circulation, and chip channel samples.
    • The Björkdal open pit Mineral Resource is estimated at a cut-off grade of 0.33 g/t Au and constrained by a resource pit shell to comply with the reasonable prospects for eventual economic extraction (RPEEE) criteria.
    • Norrberget open pit Mineral Resources are estimated at a cut-off grade of 0.35 g/t Au and constrained by a resource pit shell to comply with the RPEEE criteria.
    • The Björkdal underground Mineral Resource is estimated at a block cut-off grade of 0.77 g/t Au for all veins
    • A nominal two meter minimum mining width was used to interpret veins and comply with the RPEEE criteria.
    • The Reported Mineral Resource is depleted for previously mined underground development and stopes.
    • The Stockpile Mineral Resource is estimated based upon surveyed volumes supplemented by production data.
    • Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
    • Numbers may not sum due to rounding.
    • The Mineral Resource Estimate as of 31st December, 2021 for Björkdal was independently reviewed and verified by Dr Andrew Fowler MAusIMM CP (Geo), a full time employee of Mining Plus. Dr Fowler fulfils the requirements to be a "Qualified Person" for the purposes of NI 43-101 and is the Qualified Person under NI 43-101 for the Mineral Resource. The Independent Qualified Person for Norrberget Mineral Resource estimate is Reno Pressacco, P.Geo., Principal Geologist with SLR, who is a Qualified Person as defined by NI 43-101

2022 NI 43-101
2021 NI 43-101
2020 NI 43-101

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