Antimony Canyon
Antimony Canyon Antimony Project, Utah – America’s largest and highest grade antimony project, primed to be the USA’s first domestic producer and supplier of antimony
Comprising 49 unpatented lode mining claims, the project is located in a mining-friendly jurisdiction offering year-round access and established infrastructure.
Antimony Canyon further strengthens Trigg Minerals’ position in the U.S. critical minerals sector at a time when the United States has no domestic antimony production and is entirely reliant on imports. This strategic vulnerability has prompted strong federal initiatives to encourage the development of secure local supply chains.
Resource Estimate
The Utah Geological and Mineral Survey reported a foreign resource estimate of 12.7 million metric tonnes at 0.79% antimony, containing 100,300 tonnes of contained antimony. The foreign resource estimate is based on a limited number of mines within the camp; a comprehensive assessment of all mineralised trends and legacy workings presents a strong opportunity to define a materially larger resource under modern exploration. Antimony Canyon is currently America’s largest and highest-grade antimony project.
Geological Setting
The Antimony Canyon Project is geologically positioned at the southeastern margin of the Marysvale volcanic field, within the complex structural transition between the Basin and Range Province and the Colorado Plateau. Antimony mineralisation is primarily hosted within limey sandstone units of the Palaeocene Flagstaff Formation. These sandstones form a 60-metre-thick sedimentary sequence, overlain by the Oligocene to Miocene Bullion Canyon Volcanics. High-grade stibnite (Sb₂S₃) mineralisation occurs as irregular lenses, veinlets, and pods within fractured sandstone, typically aligned along a broad east-west structural corridor. Associated minerals include pyrite, quartz, kaolinite, realgar, and orpiment, suggesting a hydrothermal origin linked to structural fluid flow pathways.
Exploration Potential
Historical exploration, including systematic sampling by the U.S. Bureau of Mines (1941–42), confirmed widespread antimony mineralisation across a 5km x 3km area. Eighty per cent of samples exceeded 0.1% Sb, and peak assays reached 11.55% Sb. Numerous historical workings and surface exposures suggest the mineralisation footprint extends beyond the currently defined areas, particularly beneath talus slopes and within cliff faces up to 240 metres high. The geological setting, favourable host rocks, structural complexity, and historical mining activities collectively point to significant potential for resource expansion through modern exploration methods.
Future Outlook
Trigg Minerals is preparing to undertake a systematic exploration program at Antimony Canyon, designed to validate historical data, define the full extent of mineralisation, and advance the project towards a JORC-compliant Mineral Resource Estimate. Planned activities include detailed geological mapping, trenching, channel sampling, and targeted drilling across priority zones.
Given the critical role of antimony in U.S. supply chains and the federal government’s strategic focus on developing secure domestic supplies of critical minerals, Antimony Canyon is well-positioned to contribute to North America’s future antimony production landscape.