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Idaho Strategic Resources Geologists Make Carbonatite Discovery at Lemhi Pass in Idaho - Up to 6.14% TREO
Samples taken from outcrop assayed up to 6.14% total rare earth oxides (TREO) with ratios of 65% magnet rare earth oxides (Nd, Pr, Dy, Tb) and 11% SEG oxides (S
About this update from Idaho Strategic Resources, Inc.
[{"type":"text","content":" Samples taken from outcrop assayed up to 6.14% total rare earth oxides (TREO) with ratios of 65% magnet rare earth oxides (Nd, Pr, Dy, Tb) and 11% SEG oxides (Sm, Eu, Gd) This discovery marks the first time that a carbonatite has been identified at Lemhi Pass - alters and expands upon the historic assumptions of prior geologic reports Carbonatites are the primary lode source of REEs at the three major REE operations globally - Mountain Pass in the U.S., Mount Weld in Australia, and Bayan Obo in China COEUR D'ALENE, ID / ACCESS Newswire / August 28, 2025 / Idaho Strategic Resources (NYSE American:IDR) (\"IDR\" or the \"Company\") is pleased to announce the discovery of a carbonatite with strong rare earth elements (REE) mineralization at the Lucky Horseshoe prospect within the Company's Lemhi Pass project. The table below shows three samples recently taken by IDR geologists which mark the discovery of the Lucky Horseshoe carbonatite. Sample 98780 is representative of possible carbonatite ore, while Samples 98779 and 98778 are representative of the wall rock hosting the carbonatite. Idaho Strategic's VP of Exploration, Rob Morgan commented, \"We are very encouraged by these strong results from our newly discovered carbonatite at the Lucky Horseshoe prospect. The high-grade assay results, the consistency of the magnet rare earth element ratio at 65%, and the SEG (Sm, Eu, Gd) ratio at 11% has the same geochemical signature as the previously reported trench samples from the nearby In-Trust prospect. This has led to a reinterpretation of the mineralization at Lemhi Pass. At the In-Trust prospect, previously recognized faults/veins observed in the In-Trust trenches are now interpreted as deeply weathered carbonatite dikes. These carbonatite dikes are associated with a shear zone showing mylonitic textures and most importantly bears primary K-spar crystals indicative of an igneous origin. Given the recent geologic reinterpretation, we believe this discovery marks the beginning of other possible REE carbonatite discoveries at Lemhi Pass.\" Until this recent discovery, historic geologic reports led many to believe that the carbonatites within the Idaho REE-Th Belt were confined to the northern portion of the Belt, where IDR's Mineral Hill REE project is located. Discovering a carbonatite at the Lucky Horseshoe prospect at ...