en.Wedoany.com Reported - Australia-listed exploration company Red Mountain Mining Ltd (ASX: RMX) announced on June 9, 2026, that its U.S. field team has visually confirmed outcropping garnet skarn at the "Mammoth" and "Greenstone" prospects within the Pioneer Tungsten Project in southwestern Montana. The company also identified multiple shallow subsurface magnetic anomalies within the claim area using newly completed 3D magnetic modeling.
Founded in 2006 and headquartered in Subiaco, Western Australia, Red Mountain Mining is an ASX-listed critical minerals and gold exploration and development company. It holds a portfolio of strategic mineral projects, including antimony, gold, lithium, and tungsten, in premier mining jurisdictions in the United States and Australia. The Pioneer Tungsten Project is located in the Pioneer Mountains of southwestern Montana, covering approximately 209 hectares along the eastern margin of the Mount Torrey Batholith. It comprises three prospects—"Mammoth," "Greenstone," and "Lost Creek"—hosting scheelite-bearing garnet skarn, with local skarn thicknesses reaching up to 25 meters. The project claims are situated within the jurisdiction of the U.S. Bureau of Land Management, and Red Mountain Mining holds stable federal mining claims to advance permitting and drilling plans.
On May 27, 2026, Red Mountain Mining completed due diligence and exercised its option to acquire 100% ownership of the project. The company conducted a three-day field reconnaissance in late May, collecting 24 rock samples, including skarn and altered material. The samples have been dispatched to a laboratory for multi-element analysis, with tungsten assay results expected by the end of this month. The 3D magnetic modeling reveals subsurface magnetic bodies at drillable depths beneath the "Mammoth" and "Greenstone" prospects. These features are interpreted as shallow extensions of a granodiorite source underlying quartzite units, with a direct spatial relationship between the magnetic high at the "Greenstone" prospect and the outcropping garnet skarn.
Historically, in 1951, Minerals Engineering Company mapped scheelite-bearing garnet skarn over a strike length exceeding 400 meters at the "Greenstone" prospect surface. Subsequent four shallow drill holes intersected mineralization at depths ranging from 5.8 meters to 10.7 meters, with average grades of 0.34% to 0.48% tungsten trioxide (WO₃). The Pioneer Tungsten Project is adjacent to Almonty Industries' Gentung tungsten deposit, which hosts mineral resources of 6.83 million tonnes at a grade of 0.315% tungsten trioxide. Red Mountain Mining plans to prioritize testing the down-dip extension of the skarn at the "Greenstone" prospect following modern drilling to validate historical results. The project is advancing through the permitting process with Montana contractor K C Harvey Environmental.
This geological confirmation and model identification provide a basis for delineating drill targets at the Pioneer Tungsten Project, marking the transition from the acquisition phase to on-site exploration and validation.
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