Resolution Minerals Hits 49.8% Antimony and 1,420 g/t Silver at Antimony Ridge

Exceptional Surface Sampling Results

Resolution Minerals Ltd (ASX – RML) has delivered a compelling update on its Antimony Ridge target within the Horse Heaven Gold-Antimony-Silver-Tungsten Project in Idaho, USA. Recent surface rockchip and soil sampling programs have returned outstanding assay results, including rockchip samples grading as high as 49.8% antimony (Sb), 1,420 grams per tonne (g/t) silver (Ag), and 4.43 g/t gold (Au). These figures represent some of the highest grades recorded at the Horse Heaven Project to date, underscoring the potential for a significant mineralised system.

Expanding the Mineralised Footprint

Soil sampling has delineated a broad northeast-southwest trending zone of Sb-Ag-Au mineralisation measuring approximately 1,000 meters by 700 meters, substantially larger than previously recognised. This corridor remains open-ended along strike, with indications of additional parallel mineralised zones. The soil geochemistry aligns well with historical trench rockchip results, which include gold grades up to 5.9 g/t and antimony up to 19%, suggesting a complex and extensive mineral system.

Historical Context and Strategic Location

Antimony Ridge hosts historical antimony workings dating back to the mid-20th century, with production from small open pits during World War II and into the 1950s. Historical drilling, while limited in antimony assays, confirmed significant gold mineralisation, including intercepts of 2.11 g/t Au over 9.14 meters. The project’s proximity; just six kilometers west; to Perpetua Resources’ large Stibnite Gold Project adds strategic importance, positioning Resolution Minerals to potentially benefit from regional infrastructure and market interest in antimony and precious metals.

Next Steps – Metallurgy and Drilling

Resolution is advancing metallurgical test work on representative stibnite-silica vein samples to better understand processing characteristics, a critical step for economic assessment. Concurrently, the company is progressing its Phase 1 drilling program at the nearby Golden Gate target and plans to seek permits for drilling at Antimony Ridge. These efforts aim to refine exploration targets and move towards defining a JORC-compliant resource, which would be a significant milestone for the project.

Broader Implications

The high-grade antimony results are particularly noteworthy given the rarity of such concentrations globally. As antimony is a critical metal for flame retardants, batteries, and other industrial applications, Resolution’s findings could position the Horse Heaven Project as a key future supplier. The expanded mineralised footprint and ongoing exploration activities suggest that the project’s full potential is only beginning to be understood.