American Rare Earths Channel Sampling Program Highlights TREO Grades up to 13,651 ppm
American Rare Earths (AMRRY) has reported promising results from its channel sampling program at the Cowboy State Mine, part of the Halleck Creek Rare Earths Project in Wyoming. The program revealed Total Rare Earth Oxide (TREO) grades up to 13,651 ppm (1.37%), with 15 of 106 samples exceeding 4,500 ppm TREO.
Key findings include magnet rare earth oxides (MREO) averaging 1,023 ppm (28% of total TREO) and heavy rare earth oxides (HREO) averaging 464 ppm (13% of TREO). The southern portion of Red Mountain showed the highest-grade material. The company's Pre-Feasibility Study remains on track for completion in late 2025, with potential first production by 2029.
Located on state lands in Wyoming, the project benefits from streamlined development pathways and could become a significant domestic source of critical rare earth materials, particularly terbium and dysprosium, which are crucial for high-temperature magnet performance and currently face export restrictions from China.
American Rare Earths (AMRRY) ha riportato risultati promettenti dal suo programma di campionamento a canale presso la Cowboy State Mine, parte del progetto Halleck Creek Rare Earths nel Wyoming. Il programma ha evidenziato grade di Ossidi Totali di Terre Rare (TREO) fino a 13.651 ppm (1,37%), con 15 campioni su 106 che superano i 4.500 ppm di TREO.
I principali risultati includono ossidi di terre rare magnetiche (MREO) con una media di 1.023 ppm (28% del TREO totale) e ossidi di terre rare pesanti (HREO) con una media di 464 ppm (13% del TREO). La porzione meridionale di Red Mountain ha mostrato il materiale con la più alta concentrazione. Lo studio di prefattibilità dell'azienda è previsto per il completamento entro la fine del 2025, con una possibile prima produzione nel 2029.
Situato su terreni statali del Wyoming, il progetto beneficia di percorsi di sviluppo semplificati e potrebbe diventare una fonte nazionale significativa di materiali critici di terre rare, in particolare terbio e disprosio, fondamentali per le prestazioni dei magneti ad alta temperatura e attualmente soggetti a restrizioni all'esportazione dalla Cina.
American Rare Earths (AMRRY) ha reportado resultados prometedores de su programa de muestreo en canal en la Cowboy State Mine, parte del proyecto Halleck Creek Rare Earths en Wyoming. El programa reveló leyes de Óxidos Totales de Tierras Raras (TREO) de hasta 13,651 ppm (1.37%), con 15 de 106 muestras superando los 4,500 ppm de TREO.
Los hallazgos clave incluyen óxidos de tierras raras magnéticas (MREO) con un promedio de 1,023 ppm (28% del TREO total) y óxidos de tierras raras pesadas (HREO) con un promedio de 464 ppm (13% del TREO). La porción sur de Red Mountain mostró el material de mayor ley. El estudio de prefactibilidad de la compañía sigue en camino para completarse a finales de 2025, con una posible primera producción para 2029.
Ubicado en tierras estatales de Wyoming, el proyecto se beneficia de vías de desarrollo simplificadas y podría convertirse en una fuente doméstica significativa de materiales críticos de tierras raras, particularmente terbio y disprosio, que son cruciales para el rendimiento de imanes de alta temperatura y actualmente enfrentan restricciones de exportación desde China.
American Rare Earths (AMRRY)는 와이오밍에 위치한 Halleck Creek 희토류 프로젝트의 일부인 Cowboy State Mine에서 실시한 채널 샘플링 프로그램에서 유망한 결과를 보고했습니다. 이 프로그램은 총 희토류 산화물(TREO) 등급이 최대 13,651 ppm (1.37%)에 달하며, 106개 샘플 중 15개가 4,500 ppm TREO를 초과했습니다.
주요 결과로는 자기 희토류 산화물(MREO)이 평균 1,023 ppm (총 TREO의 28%)이고, 중희토류 산화물(HREO)은 평균 464 ppm (TREO의 13%)로 나타났습니다. Red Mountain 남부 지역이 가장 높은 등급의 광물을 보였습니다. 회사의 예비 타당성 조사는 2025년 말 완료를 목표로 하며, 2029년까지 첫 생산이 가능할 것으로 예상됩니다.
와이오밍 주 정부 소유 토지에 위치한 이 프로젝트는 개발 경로가 간소화되어 있으며, 특히 고온 자석 성능에 필수적인 터븀과 디스프로슘 같은 중요 희토류 자재의 국내 주요 공급원이 될 수 있습니다. 현재 이들 자재는 중국의 수출 제한을 받고 있습니다.
American Rare Earths (AMRRY) a annoncé des résultats prometteurs issus de son programme d'échantillonnage en canal à la Cowboy State Mine, faisant partie du projet Halleck Creek Rare Earths dans le Wyoming. Le programme a révélé des teneurs en oxydes totaux de terres rares (TREO) allant jusqu'à 13 651 ppm (1,37%), avec 15 échantillons sur 106 dépassant 4 500 ppm de TREO.
Les principales conclusions incluent des oxydes de terres rares magnétiques (MREO) avec une moyenne de 1 023 ppm (28 % du TREO total) et des oxydes de terres rares lourdes (HREO) avec une moyenne de 464 ppm (13 % du TREO). La partie sud de Red Mountain a présenté le matériau de plus haute teneur. L'étude de préfaisabilité de l'entreprise reste en bonne voie pour être achevée fin 2025, avec une production potentielle dès 2029.
Situé sur des terres publiques du Wyoming, le projet bénéficie de voies de développement simplifiées et pourrait devenir une source nationale importante de matériaux critiques de terres rares, en particulier le terbium et le dysprosium, essentiels pour la performance des aimants à haute température et actuellement soumis à des restrictions d'exportation en provenance de Chine.
American Rare Earths (AMRRY) hat vielversprechende Ergebnisse aus seinem Kanalprobenprogramm in der Cowboy State Mine, Teil des Halleck Creek Rare Earths Projekts in Wyoming, veröffentlicht. Das Programm zeigte Gesamtgehalte an Seltenen Erden Oxiden (TREO) von bis zu 13.651 ppm (1,37%), wobei 15 von 106 Proben über 4.500 ppm TREO lagen.
Wichtige Erkenntnisse umfassen magnetische Seltene Erden Oxide (MREO) mit durchschnittlich 1.023 ppm (28 % des gesamten TREO) und schwere Seltene Erden Oxide (HREO) mit durchschnittlich 464 ppm (13 % des TREO). Der südliche Teil des Red Mountain zeigte das Material mit der höchsten Konzentration. Die Vorstudie des Unternehmens soll bis Ende 2025 abgeschlossen sein, mit einer möglichen ersten Produktion im Jahr 2029.
Das Projekt befindet sich auf Staatsland in Wyoming, profitiert von vereinfachten Entwicklungswegen und könnte eine bedeutende inländische Quelle für kritische Seltene Erden Materialien werden, insbesondere Terbium und Dysprosium, die für die Leistung von Hochtemperaturmagneten entscheidend sind und derzeit Exportbeschränkungen aus China unterliegen.
- High-grade TREO findings up to 13,651 ppm (1.37%)
- Strong presence of valuable magnet rare earths (28% of TREO)
- Project located on state lands, avoiding federal permitting complications
- Potential first production by 2029
- Strategic positioning as domestic supplier amid China's export restrictions
- Production timeline extends to 2029, indicating a long development period
- Project still in early stages, pending Pre-Feasibility Study completion
HIGHLIGHTS
- Channel sampling across Cowboy State Mine returned TREO grades up to 13,651 ppm (
1.37% ) - 15 of 106 samples exceeded 4,500 ppm TREO
- Magnet rare earth oxides (MREO) averaged 1,023 ppm, approximately
28% of total TREO composition - Heavy Rare Earth Oxides (HREO) averaged 464 ppm, representing ~
13% of TREO composition - Results will be incorporated into the resource model in support of Pre-Feasibility Study, which remains on track for completion in late 2025
DENVER, May 08, 2025 (GLOBE NEWSWIRE) -- American Rare Earths Limited (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) (ARR or the Company) is pleased to report the results from a mapping and channel sampling program across the Cowboy State Mine (CSM) area, part of the Halleck Creek Rare Earths Project in Wyoming. A total of 106 channel samples were collected across Red Mountain by geologists from Wyoming Rare (USA) Inc (WRI), ARR’s wholly owned U.S. subsidiary, in collaboration with technical support from Geosyntec.
Assay results confirmed elevated rare earth mineralization across the Red Mountain area, including a standout sample grading
These results further highlight the southern portion of Red Mountain as hosting some of the highest-grade material observed to date for the CSM area. The channel sampling data is currently being incorporated into an updated geological model and mineral resource estimate for the CSM area. This model will assist mine planning and support the Pre-Feasibility Study, which remains on track for completion in late 2025.
Chris Gibbs, Chief Executive Officer, said:
“Halleck Creek is shaping up to be the next major rare earths project in the United States. With the high-value core four magnet rare earths including neodymium, praseodymium, dysprosium and terbium consistently present across the Cowboy State Mine, we are advancing one of the few U.S. projects capable of supplying these critical materials at scale.
What’s especially encouraging is the continued confirmation of these core four rare earths across the sampled area. In particular, terbium and dysprosium are vital for high-temperature magnet performance and remain in extremely limited supply outside of China. Based on our Scoping Study, they are expected to contribute over 25 percent of project revenues, despite representing a small percentage of overall tonnage.
Importantly, we don’t need federal permitting reform to move forward. Being located on state lands in Wyoming gives us a clear and streamlined path to development. With China’s recent export bans on terbium and dysprosium, the national importance of Halleck Creek as a secure domestic source has never been clearer.
As outlined in our Updated Scoping Study3, a staged development could see first production as early as 2029. With its scale, simplicity and multi-generational resource potential, Halleck Creek has the attributes to become one of America’s most significant rare earths projects.”
Detailed announcement with JORC Table and technical report can be found here.
This release was authorized by the Chairman of American Rare Earths.
About American Rare Earths Limited:
American Rare Earths (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) is a critical minerals company at the forefront of reshaping the U.S. rare earths industry. Through its wholly owned subsidiary, Wyoming Rare (USA) Inc. (“WRI”), the company is advancing the Halleck Creek Project in Wyoming—a world-class rare earth deposit with the potential to secure America’s critical mineral independence for generations. Located on Wyoming State land, the Cowboy State Mine within Halleck Creek offers cost-efficient open-pit mining methods and benefits from streamlined permitting processes in this mining-friendly state.
With plans for onsite mineral processing and separation facilities, Halleck Creek is strategically positioned to reduce U.S. reliance on imports—predominantly from China—while meeting the growing demand for rare earth elements essential to defense, advanced technologies, and economic security. As exploration progresses, the project’s untapped potential on both State and Federal lands further reinforces its significance as a cornerstone of U.S. supply chain security. In addition to its resource potential, American Rare Earths is committed to environmentally responsible mining practices and continues to collaborate with U.S. Government-supported R&D programs to develop innovative extraction and processing technologies for rare earth elements.
Investors can follow the Company’s progress at www.americanree.com
For further information contact:
| Susan Assadi Media Relations US sassadi@americanree.com 347 977 7125 | Beverly Jedynak Investor Relations US Beverly.jedynak@viriathus.com 312 943 1123 |
A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/09dbcb71-a182-4729-9412-882b9afa9fdc
1 MREO = Pr6O11, Nd2O3, Tb4O7, and Dy2O3
2 HREO = Y2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, and Lu2O3
3 ASX Announcement 7 March 2025
FAQ
What are the latest TREO grades found at AMRRY's Cowboy State Mine?
When is AMRRY's Halleck Creek project expected to begin production?
What percentage of rare earth oxides at AMRRY's project are magnet rare earths?
When will AMRRY complete the Pre-Feasibility Study for Halleck Creek?
What is the significance of AMRRY's Halleck Creek location in Wyoming?
