Resolution Minerals Ltd (ASX: RML) has launched a district-scale stream-sediment sampling program at its 100 per cent-owned Horse Heaven Antimony-Gold-Silver-Tungsten Project in Idaho, USA.
The campaign marks the first modern, systematic geochemical survey at Horse Heaven and aims to accelerate target generation across under-explored ground adjoining Perpetua Resources Corp’s Stibnite Gold Project.
The stream-sediment program will cover approximately 59 km² and 44 km of stream length, with around 100 samples expected to be collected.
Sampling will focus on multiple catchments draining prospective structural zones beyond the well-defined Golden Gate and Antimony Ridge areas.
The results are expected to identify anomalies for follow-up soil grids, ground-based geophysics, and drill targeting.
The work also seeks to test the Intrusion-Related Gold System (IRGS) model at Horse Heaven and assess its geological linkage with the nearby Stibnite project.
Craig Lindsay, Resolution’s CEO of U.S. Operations, said: “In parallel to our ongoing drilling program at Golden Gate and the soils and rock chip sampling at Golden Gate, Vibika Creek and Antimony Ridge, Resolution is taking an aggressive approach to identifying drill targets across Horse Heaven through this comprehensive stream sediment sampling program.
“A similar program has been used successfully at the neighbouring Stibnite Gold Project, and we expect this work will lead to an even larger portfolio of high-value exploration targets.
“I believe Horse Heaven has the scale to be a district play and is one of the most target-rich projects I have ever been associated with.
“It’s very exciting to have a project that comprises past production, historical resources and significant district-scale exploration potential with exposure to critical metals, including antimony, tungsten, silver and gold.”
Horse Heaven is located adjacent to the Stibnite Gold Project, which is being advanced by Perpetua Resources.
The Stibnite project has attracted substantial financing in recent months, including an indicative letter and preliminary term sheet from the U.S. Export-Import Bank for up to US$2.0 billion in debt funding in September 2025.
In June, Perpetua also closed an upsized US$425 million financing package, featuring a US$100 million investment from Paulson & Co.
According to Perpetua’s technical documentation, Stibnite hosts approximately 4.8 million ounces of gold reserves.
The U.S. Geological Survey has highlighted the strategic importance of antimony supply, noting net import reliance of around the mid-80 per cent range in recent years.
Horse Heaven’s antimony endowment, coupled with tungsten, silver and gold potential, places it in a favourable position as U.S. policymakers emphasise critical minerals security.
Resolution’s next steps focus on extending geochemical coverage across Horse Heaven to identify new high-priority gold, antimony, tungsten and silver targets while defining exploration potential beyond established zones.
The program will also generate prospects for follow-up work including mapping, soil grids, geophysics and drilling.
