American Uranium Elevates Lo Herma Resource to 9.45Mlbs, Eyes Q3 ISR Scoping Study
American Uranium Ltd has increased its Lo Herma uranium resource to 9.45 million pounds with 43% now Indicated, marking a 10% growth and advancing the project toward a pivotal Scoping Study in Q3 2026.
- Lo Herma Mineral Resource Estimate grows to 9.45Mlbs eU3O8
- 43% of resource now classified as Indicated, up from prior estimates
- 66 of 121 permitted drill holes completed; 55 holes planned for Q2 2026
- Combined Wyoming uranium resources total 11.11Mlbs including Great Divide Basin
- Q3 2026 Scoping Study to assess ISR development and processing options
Resource Growth and Confidence Boost
American Uranium Ltd (ASX:AMU) has reported a significant update to its flagship Lo Herma uranium project in Wyoming’s Powder River Basin, increasing the Mineral Resource Estimate (MRE) to 9.45 million pounds of uranium oxide (eU3O8). This represents a 10% increase from the previous 8.57 million pounds and importantly, 43% of the resource is now classified as Indicated, reflecting enhanced geological confidence.
The resource growth is underpinned by the completion of 66 drill holes out of a permitted 121, with 55 additional holes scheduled for the second quarter of 2026. These drilling efforts have not only expanded the resource but also improved the classification within the planned Scoping Study footprint, Mine Units 1 through 3, where resources now total 7 million pounds with 46% Indicated.
Strategic Positioning in a Prolific ISR District
Lo Herma’s location within Wyoming’s established ISR uranium district is a strategic advantage. The project is surrounded by several operating and permitted ISR facilities, including those owned by industry leaders such as Ur-Energy, Cameco, and Energy Fuels. This proximity offers potential synergies, particularly with regional processing infrastructure that could support a hub-and-spoke development model, a common and efficient approach in the region.
American Uranium’s CEO Bruce Lane highlighted that Lo Herma is approaching the scale of comparable projects like Shirley Basin and Gas Hills, positioning it well for development. The upcoming Scoping Study will evaluate various development scenarios, including standalone processing or integration with existing regional facilities.
Technical Foundations and Ongoing Work
The updated MRE is based on extensive historical data combined with recent drilling campaigns and hydrogeological and metallurgical testing. The project employs industry-standard Grade Thickness (GT) contour modelling consistent with JORC Code (2012) guidelines. Hydrogeological tests confirm that the deposit’s characteristics align with those of successful ISR operations nearby, supporting the feasibility of ISR mining methods.
Metallurgical testing, though preliminary, indicates alkaline leach amenability consistent with other southern Powder River Basin projects. Further testing and drilling are planned to refine these technical inputs ahead of the Scoping Study targeted for Q3 2026.
Exploration Target Expansion and Future Outlook
Alongside the resource upgrade, the Exploration Target Range (ETR) for Lo Herma has been increased to between 5.79 and 7.54 million tonnes at grades ranging from 500 to 700 ppm U3O8. This reflects new drilling results and additional claims staked, underscoring the project’s exploration upside. However, the ETR remains conceptual, with further drilling required to convert these targets into JORC-compliant resources.
Looking ahead, American Uranium plans to complete the remaining drilling in Q2 2026 and deliver a further resource update alongside the Scoping Study in Q3. This study will be critical in defining the economic and operational pathways for Lo Herma, including potential phased development and processing strategies.
Bottom Line?
As American Uranium advances Lo Herma toward a Q3 Scoping Study, the project’s growing resource and strategic location set the stage for potential ISR development in a prolific uranium district.
Questions in the middle?
- Will the upcoming Scoping Study confirm the economic viability of ISR mining at Lo Herma?
- How might integration with regional ISR processing infrastructure impact project economics?
- What further metallurgical and hydrogeological data are needed to de-risk the resource classification?
