Red Mountain confirms tungsten skarn at Pioneer, Montana

Red Mountain Mining (ASX:RMX) confirmed surface tungsten mineralisation at its Pioneer project in Montana. The explorer tested 30 rock chip samples across the Mammoth and Greenstone prospects. Ten samples returned over 500 parts per million tungstate (WO3).

At Greenstone, five samples assayed above 1,000 ppm (0.10%) WO3. The best result was 3,159 ppm (0.32%) from a garnet skarn float sample. At Mammoth, a skarn outcrop returned 2,856 ppm (0.29%).

Skarn deposits form when hot fluids from a magma body react with carbonate rocks, producing garnet-rich zones that can host tungsten. Red Mountain said the grades are comparable to Almonty's Gentung deposit, a known tungsten resource.

Six of the Greenstone samples came from a newly staked area north of the current footprint. The company expects that claim to be officially granted by the end of July CY26.

Red Mountain plans further surface work to define the extent and continuity of the mineralisation. That work will focus on Greenstone, with sampling planned for mid-July. Drill testing of downdip extensions could follow, subject to those results.

The confirmation comes as Western governments push to secure domestic supplies of critical minerals. Tungsten is used in cutting tools, military armour, and electronics. China dominates global production, making new sources outside the country strategically relevant. For a broader look at the sector, see our commodities analysis.

RMX shares traded at 1.1 Australian cents on Wednesday. The company has a market cap of roughly A$10 million. Drill testing is planned for mid-July, pending the next sampling round.