American Rare Earths Confirmed Wyoming Mineral Deposits
New assay results at the Halleck Creek project provide essential grade data for mining operators evaluating domestic supply.
Updated on Sept. 21, 2026 in Economic Indicators
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American Rare Earths has confirmed significant rare earth mineralization at the Cowboy State Mine in Wyoming. The findings, based on initial feasibility drilling, provide critical density and grade metrics for the project's ongoing development assessment.
Why it matters
Operators in the critical minerals supply chain require consistent geological confidence to project long-term project viability and cost-competitiveness. This drilling data helps transition the Halleck Creek resource from conceptual development toward active feasibility planning.
The first six drill holes yielded a pooled average grade of 3,497 parts per million (ppm) total rare earth oxides, with one sample reaching 9,084 ppm over 3.02 metres. Approximately 93% of 386 assay intervals surpassed the 1,000 ppm threshold for the 2.63 billion tonne total resource.
The players
American Rare Earths
An exploration and development company focused on building a domestic supply of critical minerals in the United States.
The details
The current 18-hole HQ core drilling program focuses on higher-grade zones near the top and base of Red Mountain to refine the site's geological model. By testing these specific depths, the company aims to increase confidence in its resource classification as it builds out its feasibility study. The data provides a detailed look at the consistency of mineralization across the Cowboy State Mine area, which is essential for determining future extraction techniques.
Timeline
The feasibility drilling program is active throughout 2026.
Results from the remaining 12 holes are expected in the coming weeks.
Market Landscape
This drilling data updates the site's geological profile to meet the disclosure requirements of the JORC Code, following a pattern set by industry-wide mineral reporting mandates. The focus on high-grade zones at Halleck Creek underscores a broader trend of accelerating domestic critical mineral exploration.
Operators tracking the critical minerals sector should monitor the upcoming results for the remaining 12 holes to gauge consistency across the wider project area. These feasibility metrics will directly impact long-term supply chain planning for companies dependent on rare earth inputs.
The takeaway
Reliable grade data is the primary hurdle for moving domestic mining projects from exploration into production. Watch the upcoming feasibility study results to assess how these mineralization grades align with current industrial processing costs.
Further reading
For more on market signals regarding natural resources, see Economic Indicators.
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