Fireweed Zinc Ltd (CVE:FWZ), the Yukon-based junior, said it had filed its preliminary economic assessment (PEA) for the Macmillan Pass project in Yukon, Canada, which showed a long mine life and large-scale production.
As reported in May, the PEA showed a long mine life of 18 years, which showed net present value (NPV) of C$779mln, using an 8% discount rate, with an internal rate of return of 32%.
"We are pleased to file our PEA technical report on SEDAR to give the full details of the work that was completed by our staff and consultants,"said Brandon Macdonald, chief executive, on Tuesday.
"Many aspects of this study were completed at a level even higher than that required for a PEA study, and we will continue to strive to present the most comprehensive work that shows the robustness of our project."
Other highlights included pre-production capex of US$404mln and a payback period of four years.
Fireweed Zinc Ltd shares were unchanged at C$1.43 each.