In early 2013, Alexco released an initial Mineral Resource calculation for its new Flame & Moth discovery. The Flame & Moth discovery was “blind”, relatively shallow (cropping out in the subsurface below thick glacial fill) and adjacent to existing infrastructure. By 2019 the Flame & Moth Indicated Mineral Resource comprised approximately 1.68 Mt of 498 g/t silver with approximately 7% combined lead and zinc and 0.4 g/t gold. More recently, the PFS delineates approximately 700,000 t of the Mineral Resource as Probable Mineral Reserve grading 671 g/t silver with approximately 8.4% combined lead and zinc and 0.5 g/t gold.
The Flame & Moth mine is located adjacent to the existing mill and administration facilities. The portal and infrastructure were established for the Flame & Moth decline in 2016 and construction of water treatment and other support facilities was completed in 2017. Access to the mine will be through an already developed portal and 370 m long ramp. Ore from the Flame & Moth mine will be sourced from the Lightning and the Christal zones, which contain approximately 66% and 33% of total ore t, respectively.
Development in the Flame & Moth mine will be sized 3.7 m W x 4.0 m H for the ramp and 3.5 m W x 3.5 m H for the operating development and cut and fill stopes. Emergency egress and ventilation for the Flame & Moth Mine will be provided through a vent raise driven to surface.
Within the Keno Hill mine plan, Flame & Moth is the tonnage driver and contributes to mill feed throughout the entire eight years of current mine life.