Trigg Minerals Uncovers High-Grade Antimony Zones Overlooked in 2024 Resource Estimate

Historical Data Reveals Hidden Value

Trigg Minerals Ltd (ASX: TMG) has announced the discovery of substantial high-grade antimony mineralisation at its Wild Cattle Creek deposit in northern New South Wales, identified through a detailed review of historical back sampling data from the 1960s. These assays, averaging 4.83% antimony (Sb) across 38 samples, were included in earlier JORC 2012 Mineral Resource Estimates but were notably excluded from Trigg’s restated 2024 Mineral Resource Estimate (MRE).

This omission highlights a clear upside opportunity for Trigg to enhance the grade, scale, and confidence of its resource base. The historical back sampling, conducted within an underground adit developed by Dundee Mines Limited, provides critical evidence of shallow, high-grade continuity that drilling alone had underrepresented due to wider drill spacing.

Significant Intersections and Parallel Lodes

Among the notable intersections not currently modelled in the 2024 MRE are intervals such as 5.42 meters at 9.6% Sb and 2 meters at 12.7% Sb within the primary Wild Cattle Creek lode. Additionally, the parallel Roula lode, situated just 35 meters north, exhibits even higher grades averaging 13% Sb with associated tungsten mineralisation averaging 1.03% W. Roula remains open in all directions, with very limited drilling to date, suggesting considerable exploration upside.

The structural complexity revealed by adit mapping and sampling indicates multiple subparallel and complementary lodes, pointing to broader mineralisation than previously captured. This complexity could translate into a significantly larger and higher-grade resource than currently reported.

Wild Cattle Creek’s Strategic Position

Wild Cattle Creek stands as Australia’s highest-grade primary antimony resource, with a current resource of 1.52 million tonnes at 1.97% Sb, containing nearly 30,000 tonnes of antimony. The deposit is also notable for its unusually wide mineralised zones averaging 20 meters, which contrasts with the typically narrow veins seen in regional antimony deposits. This width, combined with the high grades, enhances the deposit’s economic potential and mining flexibility.

Trigg’s Managing Director, Andre Booyzen, emphasised the significance of the findings, stating that the high-grade results validate the continuity of mineralisation and support the company’s development strategy. He highlighted the potential for early, low-cost extraction from shallow zones, which could positively impact project economics and mine design.

Next Steps: Resource Update and Exploration

Trigg plans to incorporate the unmodelled historical data into an updated Mineral Resource Estimate, aiming to capture additional value not only from antimony but also from tungsten and gold present in the deposit. This integrated approach reflects the deposit’s polymetallic nature and could enhance the overall project valuation.

Further drilling is planned to test lateral and depth extensions of the mineralised zones, particularly targeting the underexplored Roula lode and other structural repetitions indicated by the adit mapping. The company continues to assess multiple targets within the Achilles Project boundary, signaling a proactive exploration strategy to expand and upgrade its resource base.

Historical Context and Technical Considerations

The Wild Cattle Creek deposit has a rich exploration history dating back to the late 19th century, with intermittent mining and extensive drilling campaigns through the 20th century. The recent review of historical data, including channel sampling and underground mapping, underscores the value of legacy information in modern resource development.

While the historical assays were conducted using methods typical of their time, some details on sample security and assay techniques remain limited. Nonetheless, independent reviews and comparisons with drilling data provide confidence in the reliability of these results.