Refining Uranium Targets with ARMIT-Based TDEM in the Southwestern Athabasca Basin
Stallion Uranium – Coyote Project, Saskatchewan, Canada
Geological Overview
The Coyote Project is located in the southwestern Athabasca Basin, in a setting comparable to uranium-rich zones near the Patterson Lake district. The area is capped by flat-lying Athabasca Group sandstones that protect deeper basement-hosted uranium structures and act as a trap for secondary mineralization. The underlying basement consists of granulite-facies gneisses and granitoids of the Taltson Domain and is cut by major fault and shear corridors that act as pathways for uranium-bearing hydrothermal fluids.
Survey Approach – ARMIT-Based TDEM for Target Refinement
Abitibi Geophysics completed a surface survey using time-domain electromagnetic (TDEM) Step-Wise Moving Loop measurements designed to couple with deep, unconformity-related conductors typical of Athabasca Basin uranium systems. Generating quality drill targets starts with quality data, and this program was designed with that principle in mind. A key component of the survey was Abitibi’s proprietary ARMIT-TDEM sensor, which simultaneously measures B-field and dB/dt. These complementary datasets are sensitive to different conductivity ranges and provide a clearer view of deep-rooted structures than a single parameter alone. Quality control was focused on the B-field data, with stacking, daily QA/QC, and repeat readings performed as required.
Stepwise Moving Loop Survey and B-field response EM profile over L 1600N.
Results
Historic VTEM, AFMAG, and airborne gravity surveys had defined the Coyote Target as a multi-kilometre-scale prospective zone aligned with magnetic lows, conductive structures, and low-density features associated with uranium-hosted alteration. The survey refined this interpretation by resolving highly conductive anomalies beneath the Athabasca sandstone cover with depth detection approaching 1,000 m, consistent with basement-hosted structures targeted for unconformity-related uranium systems. Electromagnetic modeling was then used to translate these responses into constrained conductor geometries, improving confidence in target positioning. The results demonstrate how modern EM tools and integrated modeling can strengthen the technical basis for drill targeting in complex Athabasca Basin settings.
Client Quote
“The results from the Abitibi Geophysics ground EM survey have significantly improved our understanding of the Coyote Target. The definition of multiple, highly conductive anomalies provides important guidance for refining drill hole positioning.”
— Darren Slugoski, VP Exploration, Stallion Uranium
Results of SWML plate modeling with EM plates 25 m below unconformity.
