January 20, 2026
Validating Multiphysics-Generated Drill Targets at Macmillan Pass
Providing metre-scale resolution over a volume measuring 600 million m3 from only 3 drillholes, this program showcases the success of muon tomography and multi-physics fusion for greenfield exploration at one of the world’s largest undeveloped primary zinc districts.
Macmillan Pass
PROJECT
Yukon Territory, Canada
LOCATION
Borehole
DETECTOR TYPE
Massive sulphide Zb-Pb-Ag
DEPOSIT TYPE
Located in eastern Yukon Territory about 400 km from Whitehorse, Fireweed Metals’ Macpass project lies within the traditional territories of the Kaska Dena Nation and the First Nation of Na-cho Nyäk Dun.
It hosts several large zinc-lead-silver deposits within the 940 km2 property, which is recognized as one of the world’s largest undeveloped primary zinc districts. It also has the potential to be a significant source of by-product strategic elements like gallium and germanium.
The very high density of high-grade massive sulphide bodies observed at Macpass makes the targets particularly well suited to detection using muon tomography.
“Validated against known geology, muon tomography is an effective tool for subsurface density characterization.
This broad-scale, high-resolution visibility allows us to operate more cost-effectively and decrease our exploration footprint.”
Discover the outcomes at Macmillan Pass
Download the full case study for detailed content and analysis at Fireweed Metals’ Macpass project.
