globenewswire.com · Nov 19, 2025
Mineral Resource Estimate Updated for the Cowboy State Mine Area at Halleck Creek
Highlights Updated Mineral Resource Estimate in the Cowboy State Mine (“CSM”) Area reclassifies indicated resource by 68.4 million tonnes. 102 Channel Samples collected in 2025 provided data points for an updated geological resource model, resource conversion and mineral resource estimate Summer exploration and mapping collected 18 additional channel samples across the CSM area 18 Channel samples returned average values of 5,471 ppm Total Rare Earth Oxides (TREO) Standout sample (CS25-RM111) contained a new record high assay grade for the entire Halleck Creek Resource with a Total Rare Earth Oxide (“TREO”) grade of 13,816 PPM, which is 4X higher than the resource average New exploration drilling permits obtained at Halleck Creek: 27 hole locations were permitted at the CSM area for the Development drilling needed for future technical studies beyond the Pre-Feasibility Study (“PFS”) 29 hole locations were permitted at the Bluegrass area, a potential exploration target which would add to total Halleck Creek Mineral Resource Estimates DENVER, Nov. 19, 2025 (GLOBE NEWSWIRE) -- American Rare Earths (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) (“ARR” or the “Company”), is pleased to announce an updated Mineral Resource Estimate for the Cowboy State Mine area within its flagship Halleck Creek Rare Earths Project.
