9 March 2026
Vancouver, British Columbia: Fireweed Metals Corp. (“Fireweed” or the “Company”) (TSXV: FWZ; OTCQX: FWEDF) is pleased to report that it has engaged a team of internationally recognized engineering and technical consultants with extensive project delivery and licensing experience in the Yukon and northern Canada to complete an updated Feasibility Study (“FS”) for its 100%-owned Mactung Tungsten Project (Yukon, Canada).
CEO Statement
Ian Gibbs, Fireweed President and CEO, stated: “Following our successful 2025 field season, we are engaging best in class consultants to complete an updated Feasibility Study. We are excited to continue advancing Mactung, the world’s premier tungsten deposit, unmatched in grade and scale1. We are confident that with the consultants we’ve engaged, a technically robust FS will be completed early in 2027, to be utilized in further engineering and mine licensing efforts.”
The FS will build upon extensive historical technical and field work, including the most recent 2025 field program, and will incorporate updated geological, metallurgical, mining, processing, infrastructure, and environmental designs.
Consultant Appointments
The Company has engaged the following consultants to lead and support the FS:
Wood Canada Limited has been appointed as the Lead Study consultant and will be responsible for overall study integration, infrastructure engineering, capital and operating cost estimation, and execution planning. Wood has extensive experience delivering mining and infrastructure projects in remote northern climates, with strong expertise in cold-weather construction, engineering, and logistics.
SLR Consulting (Canada) Ltd. will lead the Mineral Resource Estimate update and refinements to the geological domains, incorporating over 11,000 metres of 2025 drilling and approximately 40,000 metres of historical data into the new model. Working alongside Fireweed’s geology team, SLR brings significant mineral resource modelling and production expertise to deliver the updated estimate.
Ausenco Engineering Canada ULC will lead the process plant design, metallurgical testwork program, and flowsheet development and optimization. The team brings extensive global expertise in tungsten processing, a key focus for Fireweed, ensuring the development of a technically robust and reliable flowsheet.
Worley Canada Services Ltd. will lead mine design, optimization, planning, and cost estimation. Having been involved in previous studies at Mactung, the team brings deep project familiarity, full study lifecycle experience, and proven mining expertise in northern Canada.
Knight Piésold Ltd. will lead geotechnical design of waste and water management structures and provide geomechanical design support for the underground mine. Knight Piésold will apply extensive northern experience to advance designs in alignment with Yukon regulatory requirements through operations and closure.
Lorax Environmental Services Ltd. will lead development of the site-wide water balance, feasibility-level groundwater model, and water quality model, supported by their broader hydrogeology, geochemistry, and mine water management mandate. With strong expertise in groundwater characterization, geochemical source terms, and integrated water modelling, Lorax will provide key inputs across the project lifecycle.