enCore Energy Corp. announced the discovery of new uranium roll fronts within and near existing production fields at the Alta Mesa In-Situ Recovery Project located in Texas. These discoveries follow a detailed reanalysis of thousands of historical drill holes initiated in April 2025, enabling the company to target new economically viable zones on site.
New areas under development
The new roll fronts have been identified in three distinct areas. One of them, now undergoing permitting as the Wellfield 3 Extension, is already included in development plans. Two additional roll fronts have been discovered in the Wellfield 4 zone, each extending over 2,500 feet, at depths between 320 and 345 feet. This shallower position enables shorter drill times, reduced cement and casing costs, and faster operational timelines.
The third zone, located south of previously mined areas in Wellfield 1, continues to expand as drilling progresses. All newly discovered roll fronts are situated within the B Sand horizon of the Goliad Formation, a water-saturated sandstone layer required for In-Situ Recovery (ISR) uranium extraction.
Drill results considered viable
Recent drill results show grade-thickness (GT) values above 0.3, the recognised threshold for economic ISR development. Reported grades reach up to 0.277% uranium oxide (U₃O₈) over 5.5 feet. These figures confirm the economic potential of the new roll fronts based on the company’s production criteria.
Both historical and recent drilling confirm four saturated mineralised sandstone layers within the B Sand, all located between 320 and 345 feet below surface, with the water table at approximately 120 feet. These geological features enable efficient targeting of productive zones with limited operational impact.
Ongoing programmes and upcoming drilling
The data reanalysis campaign is expected to continue through the end of the year, with delineation drilling extending into 2026. Meanwhile, a new drill programme will begin shortly on the recently acquired Alta Mesa East property, where extensions of existing roll fronts have been identified.
The site hosts a fully licensed central processing plant with an annual capacity of 1.5 million pounds of uranium and an operational wellfield spanning over 200,000 acres of private land and mineral rights. The project is operated under a 70/30 joint venture with Boss Energy Limited.
