Resources Top 5: Resolution Minerals stands tall on back of US antimony buy.
- RML is acquiring a drill-ready antimony, gold and tungsten project in the well-endowed Stibnite Mining District of Idaho
Standing tall above the pack of ASX juniors was Resolution Minerals after climbing 78.95% to a new 18-month high of 3.4c on volume of more than 204m.
The strong support came after the company announced on Wednesday that it was
acquiring a drill-ready antimony, gold and tungsten project in the Stibnite Mining District of Idaho – next to the largest known antimony resource in the USA.
The Horse Heaven project shares its eastern boundary with A$2bn market cap Perpetua Resources and its Stibnite gold-antimony project, which hosts a 4.8Moz gold reserve and a 148Mlb antimony reserve.
Once reopened, Stibnite will be the only domestically mined source of antimony in the US, supplying around 35% of the country’s demand.
Horse Heaven has strong gold, antimony and silver mineralisation in two prospects – the Antimony Ridge Fault Zone (ARFZ) and the Golden Gate Fault Zone (GGFZ) – and includes past-producing antimony and tungsten mines.
Past rock chip results include up to 5.99g/t gold, 367g/t silver and 19.15% antimony, with past drilling returning up to 1.459g/t gold.
Resolution Minerals (ASX:RML) said the brownfields project was a transformational acquisition, with the highly encouraging past results indicating large tonnage mining potential.
It is expected to begin drilling the antimony prospects at Horse Heaven in the near-term.
Horse Heaven is also eligible for fast-tracking under FAST-41, just like Stibnite which was fast-tracked for approval in April, and on May 19, 2025, obtained final approval to be re-opened.
The company said Horse Heaven complemented its recently acquired Australian gold-antimony-copper projects – Drake East antimony-gold project (NSW), Neardie antimony project (Qld) and Spur South gold-copper project (NSW) – to create a portfolio highly leveraged to gold and antimony.
“The acquisition of the Horse Heaven project is a company transforming event for RML,” executive director Aharon Zaetz said.
“As many governments around the world look to onshore their supply of critical minerals, such as antimony, we have secured a commanding ground position with known antimony occurrences and next to what will soon be the largest antimony producer in the USA.”
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