Resolution Minerals (ASX: RML) believes that the quality of new results from its Horse Heaven project in Idaho further highlights its potential to support the USA's critical mineral needs.
The company has obtained new high-grade antimony and silver results from five samples it collected from the historical Antimony Ridge mine at Horse Heaven in October 2025.
The results identified consistently high-grade antimony and strong silver mineralisation with samples averaging 39.2% antimony and 430 grams per tonne silver.
Peak results include 48.7% antimony and 270g/t silver, as well as 37.9% antimony and 890g/t silver, highlighting Antimony Ridge as a robust, high-grade polymetallic system.
Historical Open Pits
Chief executive officer of US operations Craig Lindsay said Resolution collected the samples from historical open pits and trenches as part of a program to put together approximately 100kg of high-grade material for metallurgical testing.
“These results represent a significant validation of the Antimony Ridge target, and further demonstrate the exceptional grade potential of the Horse Heaven project," he said.
“Antimony grades of this magnitude are rarely reported globally – particularly exposed at surface – and the consistent association with strong silver and gold values materially enhances the projects overall value proposition.”
"Antimony Ridge is emerging as a large, coherent, high-grade system within a strategically critical jurisdiction at a time when sure US antimony supply has become a national priority.”
“With metallurgical test work underway and permitting progressing toward drilling and bulk sampling, we believe Horse Heaven is rapidly advancing toward becoming a highly strategic US critical minerals asset.”
Further Drilling Planned
The company is preparing to commence drilling and bulk sampling at Antimony Ridge to test the extent of the mineralisation.
It is also on target to deliver metallurgical test work results, a key milestone in the future downstream development and commercialisation of the project.
Resolution has moved quickly to explore Horse Heaven’s significant critical minerals and gold upside since acquiring the project in mid-2025.
The company recently announced a significant gold discovery at Horse Heaven’s Golden Gate North prospect, and is now finalising the next phase of drilling there as well.
