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American Rare Earths Limited (AMRRY) generates a steady stream of project and technical updates as it advances the Halleck Creek Rare Earths Project in Wyoming. News coverage for AMRRY focuses on the company’s progress in exploration, mineral resource definition, mineral processing breakthroughs and engagement with U.S. critical minerals initiatives.
Recent announcements highlight test mining at the Cowboy State Mine area, where ore was excavated and crushed under a Wyoming exploration license to supply comminution and beneficiation optimization programs and to build stockpiles for a planned demonstration plant. Other releases detail updated mineral resource estimates for the Cowboy State Mine area, incorporating channel sampling and new drilling permits that support future development and exploration in zones such as Bluegrass and Red Mountain.
Technical news is a major theme. The company reports extensive leach testing, selection of atmospheric tank leaching, and a significant impurity removal breakthrough for its allanite-based ore using magnesium oxide, which reduced problematic by-products and removed deleterious elements from leach solutions. Additional updates describe preliminary Reflux Classifier Concentrator tests, comminution work with international vendors and the successful production of mixed rare earth oxalate and mixed rare earth oxide from Halleck Creek ore.
Corporate and strategic items also appear in AMRRY news, including board changes, executive appointments, funding activities, and an expanded relationship with Tetra Tech to pursue U.S. government funding opportunities. Investors and observers can use the AMRRY news feed to follow how these technical, regulatory and corporate developments shape the company’s stated goal of contributing to U.S. mine-to-magnet supply chains.
American Rare Earths (ARRNF) has announced results from its Updated Halleck Creek Scoping Study, revealing strong economic potential for its rare earths project in Wyoming. The study presents two development scenarios:
The 3 Mtpa base case shows:
- NPV10% of US$558M with 24% IRR
- CAPEX of US$456M with 2.7-year payback
- Annual production of 4,169 metric tons TREO, including 1,833 tons NdPr oxide
The 6 Mtpa case demonstrates:
- NPV10% of US$1.17B with 28.4% IRR
- CAPEX of US$737M with 1.8-year payback
- Annual production of 7,661 metric tons TREO, including 3,344 tons NdPr oxide
The project benefits from state land tenure for accelerated permitting and covers only 16% of the total project area, with significant expansion potential. First production could begin by 2029.
American Rare Earths (ARRNF) has achieved a significant metallurgical milestone at its Halleck Creek Rare Earths Project in Wyoming. Large-scale testing has successfully demonstrated a 10:1 upgrade in rare earth concentration, increasing from 3,438 ppm (0.34%) TREO to 37,200 ppm (3.72%) TREO using conventional, low-cost methods.
The test work, conducted with Mineral Technologies on a 1.9-tonne sample, utilized MG12 Spirals and Induced Roll Magnetic Separation (IRMS) technology. The process effectively removes 93.5% of non-rare earth material early in processing, meaning only 6.5% of mined ore requires further refining, potentially reducing operating costs significantly.
The initial TREO recovery rate was 62%, below the 78% outlined in the Scoping Study. However, optimization work is ongoing to enhance recoveries while maintaining the 10X upgrade factor. These results validate key assumptions in the Scoping Study and will support the upcoming Pre-Feasibility Study (PFS).
American Rare Earths (ARRNF) announced a significant update to its Halleck Creek Rare Earth Project in Wyoming. The total mineral resource estimate increased by 12.2% to 2.63 billion tonnes at 3,926 ppm Total Rare Earth Oxides (TREO). The Red Mountain Area saw a 29.7% growth in resources to 1.24 billion tonnes, with an 8.3% grade increase to 3,252 ppm TREO.
The Cowboy State Mine, representing the first phase of development, expanded by 29.4% to 543 million tonnes, with a 2.7% increase in TREO grade to 3,438 ppm. The deposit remains open at depth and along strike, with the current estimate covering only 16% of the project area. The company plans to release an updated Scoping Study in February 2025, followed by a Pre-Feasibility Study later in the year.
American Rare Earths (ARRNF) has been recognized in the 2025 OTCQX® Best 50, ranking as the third most traded company among top performers on the OTCQX Best Market in 2024. The ranking is based on one-year total return and average daily dollar volume growth during the previous calendar year.
The company's Halleck Creek Project, containing 2.34 billion tonnes of TREO under JORC standards, is positioned as a key component of the U.S. rare earths supply chain. The project aims to reduce American dependence on foreign imports while supporting clean energy and defense technologies.
The OTCQX Best Market recognition highlights companies meeting high financial standards, following best practice corporate governance, and maintaining securities law compliance.
American Rare Earths (ARRNF) has announced that its subsidiary Wyoming Rare (USA) has been granted a License to Explore by Dozing at the Halleck Creek Rare Earths Project in Wyoming. The license enables test mining, trenching, and exploratory excavation, including bulk material sample collection at the Cowboy State Mine project area.
The bulk sampling authorization represents a important step for the company, as it will provide feedstock for future pilot plant testing at their recently acquired Laramie facility. This development will enable ARR to refine processing techniques and optimize project design, advancing toward commercial development.
CEO Chris Gibbs emphasized that this approval demonstrates their strong relationship with Wyoming state authorities and marks a significant step in developing the project while maintaining high environmental and community standards. The company will continue pilot plant testing, metallurgical analysis, and process optimization as part of their development strategy.
American Rare Earths (ARRNF) has announced that its subsidiary, Wyoming Rare (USA), has secured a facility at the Western Research Institute in Laramie, Wyoming. This development follows a recent $7.1 million grant from the State of Wyoming for rare earth processing initiatives.
The facility will serve multiple purposes, including housing drill core and assay samples, and accommodating the construction of a pilot plant for processing capabilities. The Western Research Institute, a not-for-profit research organization, specializes in advanced energy systems, environmental technologies, and materials research.
This strategic partnership aims to advance the Halleck Creek Rare Earths Project and strengthen Wyoming's position in critical minerals development while supporting the company's mission to onshore critical mineral supply chains for the USA.
American Rare Earths (ARRNF) has announced final assay results from its 2024 drilling campaign at the Cowboy State Mine area within the Halleck Creek Project, Wyoming. The results revealed the highest-grade Total Rare Earth Oxide (TREO) intersections recorded at the site, with significant intervals including: 148.0m @ 4,451 ppm TREO, 161.5m @ 4,275 ppm TREO, and 90.0m @ 4,353 ppm TREO. Multiple high-grade intersections exceeded 5,000 ppm TREO. The company plans to complete an updated resource estimate and Pre-Feasibility Study (PFS) for Halleck Creek in 2025.
American Rare Earths (ARRNF) has engaged BMO Capital Markets as its financial adviser to accelerate the development of the Halleck Creek Project in Wyoming. BMO will explore strategic investments, joint ventures, mergers and acquisitions, and offtake agreements. This follows the establishment of Wyoming Rare USA Inc. as a dedicated U.S. subsidiary. The project, recognized as one of North America's largest rare earth deposits, has received support from Wyoming Energy Authority and a Letter of Interest from the U.S. Export-Import Bank. The engagement aims to position Halleck Creek as a cornerstone of the U.S. critical minerals supply chain, capitalizing on growing U.S. support for domestic critical minerals production.
American Rare Earths (ARRNF) announces the appointment of board member Melissa Sanderson as Co-Chair of the Critical Minerals Institute (CMI). With extensive experience in diplomacy and private sector leadership, Sanderson's appointment strengthens ARR's position in developing North American rare earth elements supply chains. Her role at CMI will enhance the company's influence in critical minerals advocacy and policy-making. The appointment follows her successful efforts in securing a Letter of Interest from the Export-Import Bank of the United States for ARR's development projects. The company operates the Halleck Creek Project in Wyoming and La Paz deposit in Arizona, potentially becoming North America's largest rare earth projects.