F4 Uranium outlines resistivity-low zone at Cree Bay

Executive Summary

• F4 Uranium Corp. has released results from an airborne mobile magnetotellurics (MT) survey conducted in September 2025 on its Cree Bay property in the southwestern Athabasca basin.
• The survey identified a broad resistivity-low zone through the heart of the property, defining a key area for follow-up exploration that aligns with a promising structural offset inferred from 2019 drilling.
• The new data will be integrated with 2022 ground geophysical data to refine drill targets, leveraging the team's prior success in discovering four major uranium deposits.

Key Details

• Survey Methodology: Airborne mobile magnetotellurics (MT) survey completed in September 2025.
• Location: Cree Bay property, southwestern Athabasca basin, Northern Saskatchewan.
• Key Finding: Identification of a broad resistivity-low zone through the heart of the property.
• Geological Context:
  • The resistivity-low zone defines a key area for follow-up exploration along a structural offset inferred from 2019 drilling.
  • The property lies along the Virgin River conductive corridor and along strike of Orano and Geiger Energy's joint venture Fir Island property (approx. 10 km northeast).
  • The MT survey indicates the prospective East Channel fault continues onto the Cree Bay property.
• Historical Drilling Data (2019):
  • Drill hole CB19-001 identified significant faulting, hydrothermal alteration, and strongly elevated boron values in the sandstone.
  • The Athabasca unconformity was intersected at 565 metres, approximately 350 metres deeper than expected, suggesting a significant structural offset favorable for uranium mineralization.
• Future Plans:
  • The resistivity-low zone combined with 2022 ground geophysical data will be used to refine drill targets.
  • The broader MT dataset provides context for defining additional target areas for future focused ground geophysical surveys and follow-up exploration drilling.
• Other Properties: Mobile MT surveys have also been completed on the Todd, Clearwater West, and Grey Island properties; interpretation is underway.
• Qualified Person: Sam Hartmann, PGeo, President and COO.

Notable Quotes

• Erik Sehn, PGeo, Vice-President, Exploration: "The F4 technical team has established a proven and effective approach to uranium exploration in the Athabasca basin, having been directly involved in four major uranium discoveries, including two within the past three years. Cree Bay is an exciting project, given its proximity to Orano and Geiger Energy's Fir Island property and prospective East Channel fault, which the MT survey shows to continue onto the Cree Bay property. Incorporating and merging the results from this survey with all previous data, the F4 team will apply its understanding of geophysical signatures and geological controls from previous uranium discoveries to define strong target areas at Cree Bay in the search for the next uranium deposit."