Red Mountain Mining Grows Utah Claims to 106 After Promising Exploration

Exploration Success Spurs Claim Expansion

Red Mountain Mining Ltd (ASX, RMX) has announced highly encouraging results from its recent field program at the Utah Antimony Project, located in the historic Antimony Mining District of Utah, USA. The company’s exploration team confirmed the presence of host rocks and hydrothermal alteration zones consistent with a large epithermal antimony system, similar to that of the neighbouring Antimony Canyon Project operated by American Tungsten and Antimony Ltd (ASX, AT4).

Following these positive findings, Red Mountain has expanded its project footprint by acquiring an additional 19 claims, bringing the total to 106 claims. These new claims cover a southern extension of a major north-south structural corridor believed to control mineralisation in the district, enhancing the project's potential scale.

Geological and Geophysical Insights

The field mapping program identified key geological features such as oxidised breccias, quartz vein stockworks, and pervasive argillic alteration, all indicative of a significant epithermal mineralising system. Structural analysis revealed northwest trending faults interpreted as feeders for hydrothermal fluids, mirroring the controls seen at Antimony Canyon.

Complementing the ground work, Red Mountain commissioned Dirt Exploration to analyse satellite multispectral imagery and soil gas data. This innovative approach detected spectral signatures and gas anomalies, including mercury vapour, hydrogen, methane, carbon dioxide, and radon, which correlate with antimony mineralisation. These data sets have highlighted multiple surface and concealed targets across the project area, guiding the next phase of exploration.

Strategic Forward Program

Red Mountain plans to deploy high-resolution drone magnetics to map subsurface structures and conduct detailed surface mapping to refine target zones. This will be followed by a staged drilling program, starting with shallow rotary air blast drilling and progressing to reverse circulation and diamond drilling to test deeper targets. The company’s approach aims to delineate the extent of mineralisation and validate its geological model.

This exploration effort aligns with Red Mountain’s broader strategy to build a portfolio of critical mineral assets in Tier-1 mining jurisdictions across the US and Australia. Alongside the Utah project, the company holds promising antimony projects in Idaho and lithium projects in Nevada, positioning itself to address the growing demand for strategic metals.

Context and Market Implications

Antimony is a critical mineral with applications in flame retardants, batteries, and alloys, and supply constraints have heightened interest in domestic sources within the United States. Red Mountain’s Utah Antimony Project, adjacent to a well-established high-grade deposit, offers a compelling opportunity to contribute to Western supply chains. The recent expansion and positive exploration results underscore the project’s potential and may attract increased investor attention as the company advances toward resource definition.