Murphy Lake Geophysics

Low Resistivity = Conductor Target

The resistivity map images the lower sandstone (SST) horizon. Low-resistivity zones (blue-green, 290–1,700 ohm-m) indicate graphitic basement conductors - the structural and geochemical traps that host uranium mineralization in the Athabasca Basin.

• Color scale: 290 (blue) to 12,925 (red) ohm-m
• Low values correlate with graphitic metapelite conductors
• High values indicate resistive sandstone/quartzite
• Transition zones mark alteration halos

Multiple Conductor Corridors Identified

Interpretation of the resistivity data has identified multiple sub-parallel conductive trends striking NNE-SSW through the property. These conductors are consistent with graphitic pelite units along reactivated basement structures - the same geological setting as IsoEnergy's Hurricane deposit 5 km to the north.

• Western conductor: tested by ML22-006 (0.242% U3O8)
• Eastern conductor: untested - priority target
• Parallel to Hurricane deposit trend
• Inflection zones = highest priority drill targets

Source: F4 Uranium Corp. 2022 drill program; Murphy Lake NI 43-101 technical report by Terra Modelling Services (Louis F. Fourie, P.Geo.) on SEDAR+.

14 Holes - Uranium Confirmed

The Summer 2022 drill program completed 14 diamond drill holes testing the western conductor corridor. Hole ML22-006 returned the best intercept: 0.242% U3O8 over 0.5m at 322.5m depth at the unconformity contact.

• ML22-006: 0.242% U3O8 / 0.5m / 322.5m depth
• Unconformity contact confirmed across property
• Alteration and structure in multiple holes
• MLEM survey refining targets for 2026 program

2022 drill program operated by F4 Uranium Corp. (TSX-V: FFU). Results disclosed in F4 Uranium news releases and the Murphy Lake NI 43-101 technical report by Terra Modelling Services (Louis F. Fourie, P.Geo.) on SEDAR+.

Unconformity-Type Uranium Target

Murphy Lake targets unconformity-hosted uranium at the contact between Athabasca Group sandstone and Paleoproterozoic basement rocks. The geological cross-section below illustrates the deposit model - click to enlarge.

• Graphitic metapelite = redox trap for uranium
• Fracture zones channel mineralizing fluids
• Both basement-hosted and sandstone-hosted targets
• Same model as Hurricane (48.6 Mlb @ 34.5% U3O8)

MLEM Survey Underway

A Moving-Loop Electromagnetic (MLEM) survey is currently being conducted over the Murphy Lake property. This higher-resolution survey will refine conductor targets and define optimal drill pad locations for the Spring 2026 program.

• MLEM provides depth and dip information on conductors
• Integrates with existing resistivity data
• Will prioritize drill targets for Spring 2026
• Covers full property + extensions

Heart of the Discovery Corridor

Murphy Lake sits in the northeastern Athabasca Basin, an area with multiple uranium discoveries - approximately 5 km south of IsoEnergy's Hurricane deposit and approximately 4 km from Cameco's La Rocque Zone. Orano's McClean Lake mill is approximately 30 km to the south.