American Rare Earths Confirmed Mineralization in Wyoming
The company reported high-grade mineral findings from its feasibility drilling program at the Halleck Creek project.
Updated on Sept. 21, 2026 in Economic Indicators
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American Rare Earths has confirmed significant rare earth oxide mineralization at its Halleck Creek project site in Wyoming. Initial results from six drill holes at the Cowboy State Mine indicate high-grade potential across broad surface intervals.
Why it matters
This drilling program is designed to increase geological confidence for an ongoing feasibility study at the Cowboy State Mine. The findings provide critical data to support future resource classification and commercial development assessment.
Assay results showed a median grade of 3,879 ppm total rare earth oxides, with one sample reaching 9,084 ppm. Approximately 93% of 386 intervals exceeded the 1,000 ppm cut-off, confirming the presence of significant rare earth resources.
The players
American Rare Earths
An exploration and development company focused on advancing rare earth projects to support domestic supply chains.
The details
The current 18-hole HQ core drilling program targets higher-grade zones at Red Mountain to expand the site's total resource. The company currently estimates the project holds a mineral resource of 2.63 billion tonnes containing 8.65 million tonnes of rare earth oxides.
Timeline
The feasibility drilling program is active throughout 2026.
Laboratory results for the remaining 12 holes are expected in the coming weeks.
Macro View
This development follows patterns established during previous commodities cycles where domestic exploration projects surged to mitigate reliance on international mineral imports. The current activity reflects a broader, long-term economic push to quantify and de-risk the U.S. critical mineral supply chain.
The advancement of the Halleck Creek project could influence local job creation and state-level tax revenues linked to mining development in Wyoming. It also represents a step toward regional industrial growth, though long-term economic benefits depend on the success of the ongoing feasibility study.
The takeaway
Advancing domestic rare earth projects helps map the long-term feasibility of local resource extraction and potential supply chain autonomy. Residents and stakeholders should monitor upcoming assay reports to gauge the project's viability for full-scale operations.
What happens next
Results from the remaining 12 drill holes are scheduled for release in the coming weeks.
Further reading
For more on the state's industrial performance, visit the Wyoming Economic Indicators section.
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