Overview
Idaho Strategic’s Lemhi Pass project covers approximately 11,425 acres and is comprised of a mixture of unpatented lode mining claims, a State of Idaho mineral lease, and a mineral claim lease with a private company. The Company's Lemhi Pass land package is IDR's southern-most rare earth elements project within Idaho's Rare Earth Element Belt and it is strategically located approximately 35 miles south of the company’s Diamond Creek and Mineral Hill projects and 124 miles north of Idaho National Laboratory. IDR has completed a number of sampling programs across its Lemhi Pass property package and has received rare earth elements grades far exceeding the historically reported findings.
Mineralization
Idaho Strategic initially staked its Lemhi Pass Project to target an area with the greatest concentration of known veins where the Lemhi Pass, Dan Patch, and Bull Moose faults intersect or approach one another. The rare earth elements mineralization at Lemhi Pass has primarily been found in phosphate minerals such as monazite and xenotime. To date, Idaho Strategic has conducted geologic mapping, surface sampling programs, and a modest trenching program. Select results showing increased levels of rare earth mineralization (up to 6% TREO) have revealed a unique distribution of rare earths showing a relatively high level of magnet REEs, including neodymium, praseodymium, dysprosium, terbium, and samarium - which collectively account for more than 50% of the total rare earth elements grade on average. According to Virginia Gillerman of the Idaho Geological Survey, “The Lemhi Pass ores are unusual in that they consistently show a strong enrichment in the middle rare earths, especially neodymium. Electron microprobe analyses of monazite reveal as much as 35 weight percent Nd oxide, which is possibly the highest content known in the world.” –Gillerman, V.S., 2011, Idaho GeoNote 44: Rare Earth Elements and Other Critical Metals in Idaho
REE Distribution
*Results above are an average of 25 select samples, up to 6.19% TREO, taken at various locations across Lemhi Pass
Sparky Prospect
| Sample | Ce | Dy | Er | Eu | Gd | Ho | La | Lu | Nd | Pr | Sm | Tb | Tm | Yb | Y | Sc | ppm | TREO % |
| 98366 | 7210 | 656 | 151 | 750 | 1770 | 83 | 1340 | 7 | 8770 | 1505 | 3110 | 178 | 13.7 | 1695 | 59 | 48 | 27,345 | 3.23% |
| 98367 | 11650 | 392 | 54.2 | 731 | 1545 | 39.5 | 2410 | 2 | 11600 | 2210 | 3280 | 130 | 3.95 | 646 | 14.1 | 5 | 34,712 | 4.12% |
| 98368 | 15650 | 380 | 80.4 | 583 | 1240 | 45.4 | 2100 | 4 | 9040 | 1770 | 2710 | 112 | 7.42 | 900 | 32.6 | 74 | 34,729 | 4.15% |
| 98369 | 19000 | 496 | 70.2 | 928 | 1955 | 49.5 | 4540 | 2 | 16400 | 3260 | 4240 | 163.5 | 5.1 | 835 | 17.8 | 8 | 51,970 | 6.19% |
In-Trust Prospect
| Sample | Ce | Dy | Er | Eu | Gd | Ho | La | Lu | Nd | Pr | Sm | Tb | Tm | Yb | Y | Sc | ppm | TREO % |
| 98336 | 3200 | 128 | 50 | 238 | 366 | 21 | 445 | 5 | 10200 | 1420 | 1450 | 27 | 6 | 36 | 647 | 28 | 18,267 | 2.16% |
| 98341 | 3330 | 194 | 83 | 254 | 437 | 34 | 479 | 7 | 10050 | 1415 | 1515 | 38 | 10 | 56 | 1045 | 24 | 18,971 | 2.25% |
| 98344 | 3350 | 176 | 74 | 244 | 398 | 30 | 511 | 7 | 9890 | 1430 | 1445 | 34 | 9 | 52 | 939 | 27 | 18,616 | 2.21% |
| 98345 | 2020 | 145 | 64 | 162 | 295 | 26 | 328 | 6 | 6030 | 840 | 963 | 26 | 8 | 47 | 805 | 30 | 11,795 | 1.40% |
| 98350 | 3510 | 50 | 14 | 183 | 239 | 7 | 305 | 1 | 10050 | 1440 | 1375 | 14 | 2 | 10 | 175 | 26 | 17,401 | 2.06% |
| 98351 | 2590 | 31 | 11 | 116 | 139 | 5 | 159 | 2 | 7450 | 1080 | 894 | 8 | 2 | 10 | 137 | 47 | 12,681 | 1.50% |
| 98352 | 5800 | 113 | 38 | 361 | 519 | 16 | 433 | 4 | 19400 | 2700 | 2790 | 30 | 5 | 31 | 499 | 59 | 32,798 | 3.88% |
| 98353 | 5000 | 94 | 32 | 331 | 512 | 13 | 365 | 4 | 15800 | 2240 | 2400 | 28 | 4 | 25 | 414 | 55 | 27,317 | 3.23% |
Idaho Rare Earth Belt
The Idaho Rare Earth Belt stretches along a northwest trending zone measuring approximately 70 miles long by 8 miles wide. This belt possesses most of the REE lode occurrences in Idaho. Along this 70-mile Belt, IDR controls the Mineral Hill Property in the northwest, the Diamond Creek Property in the middle; and its greatly expanded Lemhi Pass Property in the southeast.
Significant Geochemical Anomalies
With respect to Idaho Strategic’s Lemhi Pass project, the Company’s goal during the 2025 geology field season was to build on our high-potential rare earth prospects by collecting both soil geochemistry and radiometric data to aid in advancing exploration, permitting, and drill targeting efforts. The soils geochemistry and radiometrics have defined wide elongated zones of neodymium (Nd) enrichment and radiometric highs.
The image on the left is a color relief image showing neodymium-in-soil anomalies from the Company’s soil sampling geochemistry program, consisting of over 2,000 individual samples taken on 100-meter centers with 50-meter infill sampling around elevated anomalies. The neodymium-in-soil anomalies are shown by the warm colors and range between 45 ppm to an uncapped maximum sample grade of 1,740 ppm neodymium.