• 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)
2020 Production
45,296 Gold oz
Life of Mine
10+ years
Processing Capacity
1.3 million tonnes per annum

2021 Outlook

Production
Gold (oz)
52,000 – 57,000
Antimony (t)
-
Gold Equivalent (oz)(1)
52,000 – 57,000
Cash Costs ($USD/oz)(2)
$900 – $1,050
All-in sustaining Costs ($USD/oz)(2,3)
$1,200 – $1,350
Capital Expenditures ($USDM)(4)
$32M – $36M
  • 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

2020 Performance

PRODUCTION
Gold (oz)
45,296
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, 2020 and depleted for production through December 31st, 2020. 
    • 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 dilution of 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 0.32 g/t Au.  The application of these block dilution factors is based on historical reconciliation data.  A marginal cut-off grade of 0.32 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 3.85 m for stopes (after dilution) and 4.35 m for development (after dilution) were used.  Stope dilution was applied by adding 0.5 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 0.87 g/t Au was applied to material mined within stopes. An incremental cut-off grade of 0.32 g/t Au was used for development material.
    • Stockpile Mineral Reserves are estimated at a cut-off grade of 0.32 g/t Au and are based upon surveyed volumes supplemented by production data.
    • Mineral Reserves are estimated using an average long-term gold price of US$1,500/oz, and an exchange rate of 9.0 SEK/US$.
    • Tonnes and contained gold are rounded to the nearest thousand.
    • Totals may not sum due to rounding.
    • The Independent Qualified Person for the Björkdal 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
    • Björkdal Mineral Resources are estimated using drill hole and sample data as of September 30, 2020 and depleted for production through December 31st, 2020.  Norrberget Mineral Resources are based on a data cut-off date of September 30th, 2017.
    • CIM definitions (2014) were followed for Mineral Resources.
    • Mineral Resources are inclusive of Mineral Reserves.
    • Mineral Resources are estimated using an average gold price of $1,700/oz. and an exchange rate of 9.0 SEK/US$.
    • Bulk density is 2.74 t/m3 for veins and host rock. Bulk density is 2.92 t/m3 for skarn ore bodies.
    • High gold assays were capped to 30 g/t Au for the open pit mine.
    • High gold assays for the underground mine were capped at 60 g/t Au for the first search pass and 40 g/t Au for subsequent passes.
    • High gold 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.
    • Björkdal open pit Mineral Resources are estimated at a cut-off grade of 0.28 g/t Au and constrained by a resource pit shell.
    • 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.
    • Underground Mineral Resources are estimated at a block cut-off grade of 0.77 g/t Au for all veins except the Aurora vein.  The Mineral Resources for the Aurora vein were constrained by reporting panels. 
    • A nominal two meter minimum mining width was used to interpret veins.
    • Reported Mineral Resources are depleted for previously mined underground development and stopes. 
    • Stockpile Mineral Resources are estimated at a cut-off grade of 0.32 g/t Au and are 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 Independent Qualified Person for the Björkdal and Norrberget Mineral Resource estimate is Reno Pressacco, P.Geo., Principal Geologist with SLR, who is a Qualified Person as defined by NI 43-101.   

2021 NI 43-101
2020 NI 43-101