Boss Energy’s Alta Mesa Uranium Project Unveils New Mineralisation Discoveries
Boss Energy’s (ASX: BOE) investment in the Alta Mesa uranium project in Texas continues to pay off, with news that project operator enCore Energy has identified new uranium mineralisation near existing wellfields.
The Australian company acquired a 30% interest in Alta Mesa from enCore in early 2024 for approximately $92 million and the rapidly expanding project’s US production has proven to be a valuable strategic asset alongside Boss’ Honeymoon operation in South Australia.
A new update from enCore, which owns the other 70% of the project, reports that it has discovered additional roll fronts of uranium mineralisation in at least three areas across the project.
More Granular Re-Assessment
enCore began a more granular and detailed evaluation of historical dill holes at Alta Mesa in April 2025, and delineated these new roll fronts with follow-up drilling.
The new discoveries sit ideally near other known roll fronts, with the company’s assessment likely to run until the end of the year and delineation drilling to determine the extents continuing into next year.
This is in addition to a major drill program, enCore plans to commence in the next few weeks to test the recently acquired Alta Mesa East property, previously known as Tacubaya.
A new roll front that enCore has advanced to the permitting stage as an extension of Wellfield-3 will be another major focus moving forward.
Wellfield-4 Mineralisation
The recent research also identified at least two new mineralised roll fronts overlying past productive mineralisation in Wellfield-4, each included in the existing permit authorisation and extending more than 760 metres.
enCore expects the shallowness of these new discoveries – which lie at a depth of approximately 100m, roughly 60m higher than the previously exploited roll front – to work in their favour.
They should require shorter drill times with less footage and cement, and shorter casing intervals, resulting in significant cost savings in delineation and extraction versus deeper mineralisation.
Meanwhile, enCore continues to expand a third area extending south from the mineralisation in Wellfield-1 with ongoing drilling.