Mantos Blancos (Ag)

Stream and Terms: Osisko, through its wholly-owned subsidiary Osisko Bermuda Limited, will purchase 100% of payable silver produced at Mantos Blancos until 19.3 Moz have been delivered, and 40% of payable silver thereafter for the remaining LOM. Osisko Bermuda’s purchase price for each ounce of silver delivered under the stream is equal to 8% of the monthly average silver price.
Operator: Visit Capstone Copper for more information
Primary Commodity: Copper
Location: Antofagasta, Chile
Reserves and Resources:
  • Proven and probable reserves of 22.3 Moz Ag (122.6 Mt @ 5.66 g/t Ag)
  • Measured and indicated resources (exclusive of reserves) of 13.0 Moz Ag (88.3 Mt @ 4.58 g/t Ag)
  • Inferred resources of 2.2 Moz Ag (20.0 Mt @ 3.35 g/t Ag)
  • 2020: 743 koz Au
  • 2021: 654 koz Au
  • Post expansion, 5-year average: 1,350 koz Au


  • Ramp up of phase I sulphide expansion project
  • Potential to complete further mill expansion to 10Mt per annum
  • Enhanced public disclosure and visibility with Capstone as the operator

More details in the 2022 Asset Handbook


Source: Company disclosure and Osisko management estimates.