American Tungsten Corp. has announced a significant update for its IMA Mine in Lemhi County, Idaho, releasing a new Mineral Resource Estimate (MRE) as of July 15, 2026. This estimate, prepared by Minetech, LLC under NI 43-101 standards, outlines 316,000 tonnes of indicated resources grading 0.55% WO3 and 2,178,000 tonnes of inferred resources at the same grade. Additionally, 267,000 tonnes of historical tailings have been indicated, grading 0.15% WO3. The company has highlighted the presence of substantial silver resources, with 404,000 ounces in indicated resources and 1,848,000 ounces in inferred resources.
Historical Context and Prior Exploration Efforts
The IMA Mine, a past-producing tungsten operation, has seen a series of exploration and development efforts over the years. American Tungsten Corp. initially set an exploration target for 2024, estimating that between 200,000 and 400,000 tons could be delineated from the site. However, this was a conceptual target without sufficient exploration data to define a resource at that time. By early 2025, the company had compiled historical drilling data, including noteworthy results from Hole IMA-23A, which showed 10 feet grading 1.448% MoS2, 0.422% W, 0.264% Cu, and 0.08 oz/t Ag.
In the months leading up to the current MRE, American Tungsten Corp. reported initial drilling results in February 2026 and extended the strike length of tungsten mineralization in March 2026. These efforts have culminated in the latest resource estimate, marking a significant milestone in the project’s development.
Comparing New and Historical Estimates
The new resource estimate presents a clear progression from previous assessments. Historical estimates cited by the company included 352,000 tons at 0.5% WO3, 0.19% Cu, 0.22% Pb, and 1.9 oz Ag, alongside polygonal estimates that totaled 1.023 million tons of probable/highly probable material plus 419,000 tons of possible ore. A deeper molybdenum body was also identified in 2009, estimated at 5.7 million tons of 0.15% Mo, though this was not included in indicated resources.
The current MRE reflects a more thorough understanding of the site’s potential, surpassing earlier projections and providing a more detailed breakdown of both tungsten and silver resources. The inclusion of tailings in the estimate also highlights efforts to evaluate all potential resources available at the site.
Strategic Implications and Future Developments
American Tungsten Corp.’s recent release of the MRE for the IMA Mine signals a pivotal step in the company’s strategic development of this property. With the project’s advanced status and the company’s assertion that it is “readily permittable,” the focus is likely to shift towards further exploration and the commencement of a Preliminary Economic Assessment (PEA), as indicated in previous communications.
The presence of significant tungsten and silver resources positions the IMA Mine as a potentially important contributor to American Tungsten’s portfolio, especially given the strategic importance of tungsten in various industrial applications. The company’s option to acquire full ownership of the patented mining claims, subject to a 2% royalty, alongside 113 additional federal claims, further strengthens its hold over this promising asset.
Looking ahead, American Tungsten Corp. may leverage these findings to attract investment and strategic partnerships aimed at advancing the IMA Mine towards production. As the company continues to refine its understanding of the site’s geological potential, the forthcoming months will be critical in determining its path forward, with the anticipated PEA offering further insights into the economic viability of the project.
