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.
2025 Exploration Plans
The plan at Lemhi Pass is to collect soil samples on a soil grid pattern over known and prospective areas of rare earth elements mineralization. Additionally, Idaho Strategic will conduct a handheld radiometric survey, for maximum accuracy and ground penetration, over the entirety of the company's Lemhi Pass claim holdings. The combination of soil sampling and radiometrics will allow for potential discovery of unknown rare earth element occurrences and more accurate drill planning.
High priory areas for exploration during 2025 are highlighted on the claim map to the left. These areas have been identified by Idaho Strategic geologists to contain known rare earth elements mineralization which will serve as a reference point to compare to areas previously not visited by the company that are going to be covered by the planned soil sampling and radiometric survey in 2025.