Foremost Clean Energy Ltd. (NASDAQ: FMST) (CSE: FAT) has announced the results of a helicopter-borne MobileMT electromagnetic and magnetic survey conducted in 2025 at its 25,753-acre CLK Uranium Property in the northern Athabasca Basin region of Saskatchewan. The survey, performed by Expert Geophysics Surveys Inc., aimed to map conductive and resistive anomalies and magnetic susceptibility to interpret structure and alteration zones associated with unconformity-style uranium mineralization.
Survey Details
The MobileMT survey covered 808 line-kilometers across the 136 km² CLK block. Results indicate a complex geo-electrical environment with conductive anomalies distributed from the surface to depths exceeding 900 meters, both above and below the interpreted unconformity. Following this, the company engaged Caur Technologies Inc. for an ambient noise tomography (ANT) survey to refine targeting. The ANT survey, completed in fall 2025, deployed 221 three-component sensors over an area of approximately 7.5 by 3.8 km, imaging subsurface shear-wave velocity to depths of up to 2 km. The survey was designed to delineate the depth to the Athabasca unconformity and identify structural features such as fault zones, basement architecture, and potential alteration corridors.
Integration of Data
Integration of the ANT and MobileMT datasets is underway to define high-priority drill targets near CLG-D1, a historical drill hole that intersected 8,600 ppm U (approximately 1.01% U3O8) from visible pitchblende stringers just below the unconformity. Another historical hole, CLG-D5, intersected 510 ppm U (approx. 0.06% U3O8) at about 900 meters depth immediately above the unconformity.
CEO Statement
Jason Barnard, President and CEO of Foremost Clean Energy, commented: “The MobileMT survey has provided valuable insight into the structural framework at CLK. Now, with the ANT survey complete and the final velocity model in hand, we are integrating both datasets to advance high-priority drill targets and build on the strong foundation provided by historic high-grade uranium mineralization.”
Historical Drill Highlights
- CLG-D1: Intersected 8,600 ppm U (approx. 1.01% U3O8) at 862 meters, hosted in pitchblende stringers in the basement just below the unconformity.
- CLG-D5: Intersected 510 ppm U (approx. 0.06% U3O8) at ~900 meters depth immediately above the unconformity.
Uranium values were obtained by XRF analysis, a legacy method that does not meet current industry standards. Samples are believed to represent single-point measurements rather than intervals.
MobileMT Survey Results
The MobileMT survey successfully mapped a complex conductive and resistive architecture across CLK, from surface through the Athabasca sandstone and into the underlying basement. Conductive responses within the sandstone sequence are interpreted to be associated with the Wolverine Point Formation, a known conductive unit that can obscure deeper geophysical signals. However, the MobileMT system demonstrated the ability to effectively see through this conductive horizon, enabling identification of deeper conductive features that may represent graphitic basement structures and associated alteration systems prospective for unconformity-related uranium mineralization.
