Trigg Minerals (ASX:TMG) uncovers district-scale potential at Antimony Canyon

Trigg Minerals (ASX:TMG) has delivered a substantial geological advance at its Antimony Canyon Project in Utah, with new modelling reinterpreting the system as a district-scale, high-sulfidation epithermal environment.

This breakthrough, validated by two independent expert consultancies, redefines the project’s scale and significantly enhances its exploration potential.

Highlights

• Independent geological reinterpretation positions Antimony Canyon as a district-scale, high-sulfidation epithermal system.

• Controlled-source audio-frequency magnetotellurics (CSAMT) survey completed, with initial inversions identifying shallow drill targets at 50–100 metres.

• Discovery of stacked, sub-horizontal mineralised layers within a tuff unit, boosting tonnage potential.

• Channel sampling returned high-grade antimony results, including 1.5m at 33.2% Sb.

• Priority targets fall within patented claims, offering streamlined approvals and development pathways.

The Antimony Canyon Project, located in Garfield County, Utah, has historically produced antimony but has never been subjected to modern exploration.

Until now, the geological controls on mineralisation had not been fully understood, leaving its broader potential obscured for over seventy years.

The recent work by Dahrouge Geological Consulting USA and MineOro Explorations has provided the clarity that the district lacked, establishing a coherent deposit model that not only validates historic findings but also points toward significantly greater scale.

At the core of this reinterpretation is the recognition that mineralisation is largely hosted within a welded crystal-lithic ash-flow tuff unit.

The presence of alteration minerals such as dickite, illite, and phengite confirms the influence of high-temperature, magmatically driven hydrothermal fluids.

The new model elevates Antimony Canyon from a cluster of historic mine workings to a district-scale target, with a defined footprint of 3.5 kilometres by 1.5 kilometres, open in multiple directions.

Equally important is the geometry of the mineralisation, with field mapping confirming multiple stacked mineralised horizons within the tuff unit, creating the potential for large tonnage accumulation.

Channel sampling has reinforced the robustness of the system, with assays peaking at 33.2% Sb at the Stebenite Mine and averaging 9.7% Sb across multiple samples.

Comparable results from the Little Emma and Gem mines further highlight the consistency of mineralisation across the district.

The initial results from the CSAMT geophysical survey provide further validation, with shallow conductive and resistive layers identified beneath historic mines that suggest feeder structures consistent with epithermal systems.

These features define a clear set of shallow, drill-ready targets at 50–100 metres depth, particularly within the patented claims where regulatory pathways are more streamlined.

Managing Director Andre Booyzen described the findings as a step change for the project:

“These results represent an important milestone for the Antimony Canyon Project. For over 70 years, the district’s true potential was ignored. Our expert teams have achieved a geological breakthrough, identifying the specific volcanic host rock that influences mineralisation across a broad 3.5-kilometre area. This work has reduced the project’s risk and revealed a range of attractive, shallow, drill-ready targets.”

Looking ahead, Trigg Minerals has commenced the permitting process through a Notice of Intent submission to the Utah Division of Oil, Gas, and Mining.

The company is also advancing access planning and assessing options for induced polarisation surveys to refine drill targeting, with the combination of geological reinterpretation, high-grade assays, and supporting geophysics setting a solid foundation for an initial drill program.

The Antimony Canyon Project now stands out as one of the more compelling undeveloped antimony systems in the United States, a country with limited domestic production despite the mineral’s importance in defence and energy transition supply chains.

With a modern geological framework, strong validation from independent consultants, and drill-ready targets within its own patented claims, Trigg Minerals has laid the groundwork for a potential discovery program that could reshape the profile of this long-overlooked district.

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