Trailbreaker Resources Ltd. (TBK.V) has announced the completion of its maiden drill program at the Highlands Zone and the mobilization of the drill to the Swan Zone at its 100%-owned, 300 km² Atsutla Gold Project in northwestern British Columbia. The company reported that drilling at the Highlands Zone targeted high-grade, vein-hosted gold (Au), silver (Ag), and copper (Cu) showings, while the Swan Zone drilling will focus on a Cu-Au-Ag porphyry target. The two zones are located 26 km apart and are hosted in distinct geological units: the Highlands Zone in the Jurassic Christmas Creek batholith and the Swan Zone in the Cretaceous Glundebery batholith.
Daithi Mac Gearailt, CEO of Trailbreaker, commented, “The Swan Zone continues to be one of the most compelling targets in Trailbreaker’s portfolio. Over the past five years we have developed this prospect from a new discovery and have added layers of data through systematic exploration. Detailed geological mapping, combined with soil geochemical, induced polarization (IP) and airborne magnetic surveying have led us to this current stage. The now-completed Highlands Zone drill program was executed on schedule and within budget, and I anticipate drilling the Swan Zone to proceed in a similar fashion.”
The completed diamond drill program at the Highlands Zone consisted of four holes totalling 883.40 metres, testing a strike length of 500 m and a vertical extent of 412 m. Details on the Highlands Zone drill target were provided in the June 29, 2026 news release.
The Swan Zone is a Cu-Au-Ag porphyry target located in the Cretaceous Glundebery batholith. Trailbreaker has completed extensive geochemical and geophysical surveys to define drill targets within a 1.5 km x 1.5 km multi-element (Au-Cu-Ag-arsenic [As]-molybdenum [Mo]-antimony [Sb]-bismuth [Bi]) soil geochemical anomaly. Rock grab samples from the zone grade up to 11.7 g/t Au, 212 g/t Ag, and 0.81% Cu. The geochemical anomaly coincides with a 2.1 km x 1.4 km donut-shaped chargeability high feature defined by a 2024 induced polarization survey, as well as a zone of elevated potassium marked by a magnetic low signature from 2024 airborne magnetic and radiometric surveys. Although limited historic drilling has occurred in the valley adjacent to the Swan Zone, the Swan Zone itself has never been drilled.
The diamond drill program will target surface and geophysical anomalies, testing an estimated strike length of 1,000 m to a vertical depth exceeding 400 m. The company anticipates this preliminary program will improve understanding of mineralization controls and the overall deposit model at the Swan Zone, supporting the design of future, more targeted drill campaigns.
In September 2026, Trailbreaker also plans to drill several Cu-Au porphyry targets at the Coho property, located 30 km northwest of the Mt. Milligan mine in central BC, as detailed in the May 25, 2026 news release.
The Atsutla Gold Project is centered over the regional-scale Teslin-Thibert fault system, marking the contact between the Quesnel and Cache Creek terranes. Gold mineralization is associated with Mesozoic batholitic intrusions. Since discovery in 2020, Trailbreaker has outlined five significant zones of gold mineralization across 26 km: the Highlands Zone (with veins assaying up to 630 g/t Au and 1,894 g/t Ag), Christmas Creek Zone (rock samples up to 102 g/t Au and 524 g/t Ag), Snook Zone (rock samples up to 53.3 g/t Au), Willie Jack Zone (soil samples up to 3.77 g/t Au), and the Swan Zone.
