Armide Antimony Soil Samples Peak at 1,200 ppm, Gold Hits 14 ppb

Emerging High-Grade Antimony-Gold System

Red Mountain Mining Ltd (ASX – RMX) has unveiled promising new soil sampling results from its Armidale Antimony-Gold Project in New South Wales, reinforcing the prospect of a major orogenic antimony-gold system. The recent campaign at the Oaky Creek South area returned a peak antimony value of 1,200 ppm, with 13 samples exceeding 100 ppm, alongside gold values reaching 14 parts per billion (ppb). These findings mark a significant step forward in the exploration of this underexplored region.

Geochemical Anomalies and Structural Insights

The soil sampling delineated a coherent 200-metre-long northeast-striking antimony-arsenic anomaly that remains open to the northeast, suggesting the mineralised system extends beyond currently sampled areas. Arsenic, a recognized pathfinder element for gold, showed strong anomalous values up to 1,040 ppm, spatially correlating with antimony mineralisation. The anomaly aligns with mapped quartz-carbonate-sulfide veins and is interpreted to be structurally controlled by a major fault system, enhancing the potential for significant mineralisation.

Strategic Follow-Up and Broader Project Context

In response to these encouraging results, Red Mountain plans an immediate follow-up exploration program commencing in December 2025. This will include expanding the soil sampling grid northeastwards to test the anomaly’s extension and targeting a 1-kilometre-long antimony soil anomaly at Oaky Creek North. The company also intends to explore other prospects within the Armidale project, including East Hills, which exhibited similar but lower priority antimony-gold signatures.

Red Mountain’s exploration model draws direct parallels with the nearby Hillgrove deposit, Australia’s largest antimony-gold system, currently held by Larvotto (ASX – LRV). This analogy underscores the potential scale and economic significance of the Armidale project’s mineralisation.

Critical Minerals and Market Implications

Antimony is a critical mineral with growing demand in various industrial applications, including flame retardants and battery technologies. Red Mountain’s advancement of the Armidale project aligns with broader strategic interests in securing reliable sources of critical minerals. The company’s portfolio also spans key US projects, positioning it as a notable player in the critical minerals sector.

While the current results are preliminary and based on soil and rock chip assays, they provide a compelling rationale for near-term drilling to confirm mineralisation continuity and grade. Metallurgical testing is also under consideration to assess the potential for producing a commercial antimony concentrate.