F3 Uranium Corp (TSXV: FUU) (OTCQB: FUUFF) (“F3” or “the Company”) is pleased to announce the commencement of a DIAS32 IP and resistivity geophysical survey at its 100% owned Broach Lake Property, where F3 intersected high-grade uranium mineralization at the Tetra Zone (see news release July 7, 2025). This survey is designed as an initial characterization survey directly over the Tetra Zone and consists of three lines, aiming to image chargeability and resistivity distributions related to the Tetra structure in 3D. The purpose of the survey is to generate drill targets along the Tetra Zone system by imaging the resistivity contrast associated with the mineralized structure.
This work stands to advance the next phase of drilling near F3’s newest high-grade uranium discovery and, more importantly, to guide step-out drilling along strike from the Tetra Zone, positioning the Company to expand the footprint of the Tetra mineralized system. The survey is underway and is expected to take approximately 30 days to complete.
Drill core physical properties investigations conducted at the University of Saskatchewan identified measurable resistivity contrasts through the structure hosting the Tetra Zone, with the structure showing lower resistivity than the surrounding host rocks. This IP survey aims to identify this contrast from surface, which will then be integrated with the conductive responses from previous ground EM surveys performed over the area.
The Tetra Zone has an unusual geophysical signature: it lacks the conductive minerals (graphite and sulphides) commonly associated with uraniferous structures, and the area is overlain by highly conductive Cretaceous mudstone that introduces significant noise. This resistivity survey is intended to help generate drill targets along the Tetra Zone system despite those challenges. Upon successful completion and interpretation, F3 intends to expand the survey coverage along strike in both directions.
Sam Hartmann, Vice President Exploration, commented:
“The Tetra Zone discovery has been game changing. It marked the first uranium discovery within the Clearwater Domain, a geological domain characterized by an extremely high magnetic profile and historically weak conductor responses. As a result, there has been very little historic exploration; F3 was the first mover in adopting and implementing new deposit theories that translated into discovery during our first exploration drill program.
“Many uranium discoveries in the basin are considered ‘blind’ and rely heavily on geophysics, given the general lack of outcrop within the Athabasca Basin and the heavy Quaternary cover, particularly on the west side and in the Patterson Lake area. The Tetra Zone is even more difficult due to the very weak geophysical property contrast associated with the mineralized structure.
“What we do know is that we are on a potentially large system characterized by significant hydrothermal alteration, with the Tetra Zone mineralization at its core. Historic drill hole PAT-16-002, located 1.2 km southeast of Tetra, returned a 0.5-metre interval grading 423 ppm U, the highest uranium value recorded in any single exploration core sample from the PLN Project outside of the JR and Tetra Zones (see news release July 21, 2025). This is a trend we are focused on thoroughly understanding, given the significant discovery potential. It’s also important to understand the size of the PLN property and the numerous other trends, several of which remain completely untested and a number of which we have been advancing to the drill-ready stage. We look forward to providing a summer exploration update covering the Tetra area and new target areas shortly.”
Contrinue at F3 Uranium
