Lo Herma Drilling Yields 1.8m at 0.042% eU3O8, Resource Update Imminent

Drilling Momentum Builds at Lo Herma

American Uranium Limited (ASX: AMU) has kicked off 2026 with promising results from its resource expansion drilling program at the Lo Herma ISR Uranium Project in Wyoming’s prolific Powder River Basin. With five of the planned 15 holes completed, the company has confirmed uranium mineralisation extending north of the previously defined Mine Unit 2, reinforcing the potential to grow the project’s resource base.

The standout intercept to date was recorded in drill hole LH-26-002, which returned a 1.8-metre section grading 0.042% equivalent uranium (eU3O8). This intercept is part of a broader 5.8-metre mineralised thickness, highlighting the continuity of the roll-front uranium system that characterises the deposit. Such results build on the successful 50-hole campaign completed in late 2025, demonstrating consistent mineralisation along projected redox interfaces.

Strategic Resource Growth and Upcoming Milestones

The current drilling program is designed to extend mineralised trends over a projected length exceeding 1,200 metres, with further holes planned to be completed by mid-March. These efforts are integral to an imminent update of the Mineral Resource Estimate (MRE), expected by the end of the first quarter. This update will incorporate the latest drilling data and is anticipated to add significant resource pounds, thereby enhancing the project’s economic profile.

American Uranium’s CEO, Bruce Lane, emphasised the importance of these results, noting that the ongoing drilling and pump-testing programs are critical steps toward de-risking and advancing Lo Herma toward in-situ recovery (ISR) mine development. The company’s methodical approach, leveraging both modern drilling and a comprehensive historical data set, positions it well to refine resource confidence and support forthcoming scoping studies.

Project Context and Technical Approach

Lo Herma sits within the Powder River Basin, a region with a rich history of ISR uranium production dating back to the 1970s. The project benefits from proximity to several permitted ISR facilities and a substantial historical drilling database, including over 1,000 digitised drill holes from prior exploration campaigns. This extensive data underpins the geological model and resource estimations, providing a solid foundation for ongoing exploration.

The drilling employs mud rotary techniques with vertical holes, complemented by downhole gamma logging to estimate uranium grades. The use of industry-standard equivalent uranium (eU3O8) measurements allows for rapid assessment of mineralisation continuity and grade distribution. The current program’s focus on the redox interface; the chemical boundary where uranium precipitates; is key to delineating the roll-front style deposits typical of the basin.

Looking Ahead

Following completion of the current drilling phase, American Uranium plans to continue with infill drilling, installation of monitoring wells, and further resource expansion activities throughout 2026. These steps aim to increase resource confidence and support an updated scoping study, moving the project closer to development readiness. Investors will be watching closely as the company delivers on these milestones in a uranium market increasingly attentive to supply dynamics and energy transition imperatives.