Northern Extension Discovery Could Transform Antimony Canyon’s Resource Outlook

A Breakthrough in Antimony Exploration

Trigg Minerals Limited (ASX – TMG) has announced a major advancement at its 100%-owned Antimony Canyon Project (ACP) in Utah, USA, with the discovery of a substantial new high-grade antimony zone extending approximately 1 kilometre north of the previously defined mineralised area. This extension, identified through a systematic Phase 2 rock chip and channel sampling program, has returned impressive assay results, including bonanza-grade antimony concentrations as high as 29.4% Sb.

Validating the Exploration Model

The recent sampling program, comprising 104 samples, not only confirmed the continuity of high-grade mineralisation within historic mine zones such as Little Emma, Pluto, Gem, and Star Mines but also pinpointed the mineralisation’s strong association with a distinct geological unit known as the ‘Salt n Pepper’ sandstone tuff horizon. This brittle tuff horizon acts as a key host rock, controlling the emplacement of stibnite mineralisation through hydrothermal fluid pathways. The identification of this stratabound unit provides a robust and targetable signature for ongoing exploration efforts.

Geological and Geochemical Insights

Geophysical data, including Controlled-Source Audio-frequency Magnetotellurics (CSAMT), revealed a coherent conductor extending north-northwest from the Little Emma–Gem workings, aligning with the newly discovered mineralised zone. This conductor coincides with splays of the regional Paunsaugunt Fault, suggesting that these fault structures have served as significant conduits for mineralising hydrothermal fluids. Multi-element geochemical analysis further distinguished the high-grade core zones by their relatively low mercury and arsenic content, which is encouraging from both environmental and metallurgical perspectives.

Project Scale and Next Steps

The Antimony Canyon mineralised system now spans over 3.5 kilometres of strike with multiple stacked horizons, underscoring its scale and potential as one of the most important undeveloped high-grade antimony systems in the United States. Trigg Minerals is advancing plans for a maiden drilling campaign designed to test the depth extensions of the bonanza-grade shoots at the Gem–Emma Mine zone and validate the continuity of the ‘Salt n Pepper’ tuff horizon across the project area. This drilling will provide the first modern subsurface data, paving the way toward a potential resource estimate.

Strategic Implications

With antimony being a critical mineral for various industrial applications, including flame retardants and battery technologies, Trigg’s progress at Antimony Canyon positions the company strategically within the critical minerals supply chain. The confirmation of high-grade mineralisation and the expansion of the project footprint enhance its appeal to investors and stakeholders focused on secure, Western-sourced critical minerals.