Highlights

  • TSX Venture-listed Fireweed Metals has reported high-grade zinc, lead and silver intersections at the Tom East zone in Yukon.
  • Muon tomography technology is being trialled over winter to map dense sulphide zones and guide future drilling.
  • The results add to a broader North American push to develop zinc, germanium, gallium and tungsten supply.

Base metals and by-product critical minerals remain a key theme for Australian resources watchers, particularly as governments in allied economies work to diversify Supply away from China. Within the broader universe of Metal and Mining Stocks, zinc projects that also contain germanium and gallium are gaining attention because those by-products are used in semiconductors, defence technology and solar applications. Canadian explorer Fireweed Metals Corp., which is listed on the TSX Venture Exchange rather than the ASX, has released new drilling results from the Tom East zone at its Macpass Project in Yukon, reporting thick intervals of massive sulphide mineralisation. The update offers useful context for Australian readers tracking zinc and critical minerals developments in North America.

Tom East Drilling Delivers High-Grade Intervals

Fireweed reported that a key infill hole at Tom East intersected a substantial zone of zinc, lead and silver mineralisation, which the company reported in terms of both true width and downhole length. A higher-grade core sits within the broader interval. Another infill hole also returned a broad mineralised zone with nested higher-grade intervals. The company said the broader intervals were reported as estimated true widths, which differ from the longer downhole lengths drilled.

Laboratory testwork also recorded elevated germanium and gallium in both holes. Fireweed noted that these metals were not included in its zinc-equivalent calculation, so they represent potential additional value that has yet to be assessed economically.

President and chief executive Ian Gibbs described Tom East as among the highest-grade zones at the Tom deposit. He said the metal ratios indicate feeder-style mineralisation, similar to the strongest parts of the nearby Tom South zone.

Muon Tomography Trial Over Winter

Several holes at Tom East were drilled to host muon tomography instruments, deployed in collaboration with Ideon Technologies. The survey uses naturally occurring cosmic-ray particles to map variations in rock density, which can highlight dense sulphide bodies. The instruments will operate autonomously through the Yukon winter.

Fireweed said the aim is to refine the geometry of a high-grade panel within the Tom East syncline and guide future exploration. The technique remains relatively new in mineral exploration, so its effectiveness at Macpass will become clearer once the data is processed and tested by drilling. Fireweed has indicated that the survey results will feed into planning for its next drilling campaign.

Macpass Programme and Mactung Feasibility Work

The broader Macpass programme this season included drilling at both Tom South and Tom East. Fireweed has since shut down site operations for the season and is keeping drill rigs on site for next year's campaign. Remaining Tom South results are expected to be released as they become available.

The company also completed geotechnical and hydrogeological drilling at its Mactung tungsten project, which supports an ongoing feasibility study. Mactung sits within the same Macpass district and adds tungsten exposure to the company's portfolio of zinc, lead, silver, germanium and gallium assets.

Existing mineral resource estimates for the Tom deposit include inferred material, and the latest drilling is intended partly to improve confidence and refine the structural model. Exploration results alone do not establish economic viability.

Zinc and Critical Minerals Trends

Zinc is mainly used to galvanise steel, while germanium and gallium are typically recovered as by-products of zinc and aluminium processing. China dominates refined supply of both by-product metals and has introduced export controls in recent years, prompting interest in alternative sources in Canada, the United States and Australia.

Australia is itself a significant zinc producer and refiner, and the domestic market has followed developments in by-product recovery closely. Projects such as Macpass illustrate how explorers are increasingly highlighting critical mineral credits alongside traditional base metals.

Risks and Challenges

Northern Canadian projects face short field seasons, remote logistics, infrastructure gaps and permitting requirements. Results from new technologies such as muon surveys may not translate directly into drill targets, and by-product metals require metallurgical testing before they can contribute to project economics. Zinc and silver price movements, along with funding conditions for junior explorers, can also influence how quickly a project advances towards development decisions.

Tom East Adds to the North American Zinc Story

Fireweed's latest Tom East results highlight high-grade zinc, lead and silver mineralisation with germanium and gallium credits, alongside an innovative muon survey and continued Mactung feasibility work. The company is not ASX-listed, but its progress is relevant to Australian readers following zinc supply, by-product critical minerals and the policy-driven push to build secure supply chains across allied economies.