F4 and UraniumX Expand Murphy Lake Drilling by 60% to 4,000 m as All Target Areas Return Anomalous Radioactivity
F4 and UraniumX Expand Murphy Lake Drilling
by 60% to 4,000 m as All Target Areas Return
Anomalous Radioactivity
Kelowna, British Columbia--(Newsfile Corp. - June 23, 2026) -
F4 Uranium Corp
.
(TSXV: FFU)
("
F4
"
or the "
Company
") is pleased to announce positive drilling results and the expansion of its ongoing
Murphy Lake drill program in the Athabasca Basin, Saskatchewan. Due to continued encouraging
results including
anomalous radioactivity in 100% of target areas drill tested
during this program,
coupled with strong drilling efficiency, the program scope has been increased from the originally planned
2,500 metres to 4,000 metres.
Drillhole ML26-021 encountered
strong limonite, bleaching and clay alteration
in the sandstone
above the unconformity (Image 1). The hole also intersected
anomalous radioactivity up to 350 cps
over a total of 1.0 m in basement rocks just below the unconformity.
The three most recent drill holes (ML26-019A, ML26-020, and ML26-021) were completed in Target
Areas 4 and 5 on the Murphy Lake South Trend. All three holes intersected anomalous radioactivity
and/or strong alteration along strike from historic mineralization in ML22-006: 0.065% U
₃
O
₈
over 2.5 m
(including 0.242% U
₃
O
₈
over 0.5 m) (see F3 uranium Corp news release dated August 10, 2022).
Highlight Drill Holes:
ML26-019A (Target Area 4)
Handheld scintillometer readings >300 cps over 1.0m (323.0 – 323.5 m, and 324.0 – 324.5 m)
with a peak of 510 cps in basement rocks just below the unconformity.
Corresponding anomalous downhole gamma readings >500 cps over 3.8 m (319.7 – 323.5 m)
peaking at 2,564 cps (Figure 2).
ML26-021 (Target Area 5):
Handheld scintillometer readings >300 cps over a total of 1.0 m (287.5 – 288.0 m and 292.0 292.5
m), with a peak of 350 cps. Associated with strong limonite, bleaching, and clay alteration in the
Athabasca Sandstone above the unconformity.
Corresponding anomalous downhole gamma readings >500 cps over 7.5 m (286.2 – 293.7 m)
peaking at 1,694 cps (Figure 3).
Program Update:
Seven holes have now been completed across multiple target areas. Anomalous radioactivity has
been intersected in all target areas tested to date, with five of the seven holes returning elevated
radioactivity and every hole displaying strong hydrothermal alteration at the unconformity.
Drilling is now advancing to Target Area 6 to test a strong parallel conductor identified by the
recent partner-funded MLEM survey
.
Erik Sehn, P.Geo., Vice President Exploration, commented:
"This Murphy Lake program continues to deliver strong results. These latest three holes on the Murphy
Lake South Trend have added more anomalous radioactivity and strong alteration, bringing the total to
five holes with radioactivity intersected in four target areas to date — two on the Murphy Lake North
Trend and two on the Murphy Lake South Trend. With approximately 3,200 metres drilled so far, these
encouraging intersections combined with better than expected drilling efficiency justify expanding the
program to 4,000 metres. We look forward to testing additional high-priority targets with the increased
meterage."
F4 is the operator of the fully funded program, with UraniumX Discovery Corp. earning up to a 70%
interest pursuant to the option agreement (news release dated July 29, 2025).
Table 1. Drill Hole Summary and Handheld Spectrometer Results
Collar Information
* Hand-held Spectrometer Results On
Mineralized Drill core (>300 cps / >0.5m
minimum)
Athabasca
Unconformity
Depth (m)
Total
Drillhole
Depth (m)
Hole ID
Section
Line
Easting
Northing
Elev
Azi
Dip
From (m)
To
(m)
Interval
(m)
Max CPS
ML26-
019A
585N
547477
6492601
430
111
-62
323.00
323.50
0.50
510
323.1
431
324.00
324.50
0.50
450
ML26-020
585N
547477
6492601
430
111
-78
Exploration; no radioactivity >300cps
294.5
479
ML26-021
195S
547329
6491829
429
112
-70
287.50
288.00
0.50
300
288.6
356
292.00
292.50
0.50
350
Handheld spectrometer composite parameters:
1: Minimum Thickness of 0.5 m
2: CPS Cut-Off of 300 counts per second
3: Maximum Internal Dilution of 2.0 m
Figure 1. Murphy Lake 2026 Drill Program
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10832/302496_08bc573554c7faa4_002full.jpg
Figure 2. Line 585N Cross Section
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10832/302496_08bc573554c7faa4_003full.jpg
Figure 3. Line 195S Cross Section
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10832/302496_08bc573554c7faa4_004full.jpg
Image 1. Anomalous Radioactivity and Strong Alteration in Drill Hole ML26-021
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10832/302496_08bc573554c7faa4_005full.jpg
The natural gamma radiation detected in the drill core, as detailed in this news release, was measured
in counts per second (cps) using a handheld Radiation Solutions RS-125 spectrometer which has been
calibrated by Radiation Solutions Inc. The Company designates readings exceeding 300 cps on the
handheld spectrometer (occasionally referred to as a scintillometer in industry terminology; this stems
from historical naming conventions and the shared functionality of detecting gamma radiation between a
spectrometer and a scintillometer)—as "anomalous", readings above 10,000 cps as "highly
radioactive", and readings surpassing 65,535 cps as "off-scale". The Company may also report
radioactivity as measured with a downhole QL-40GR gamma probe from Mount Sopris. The Company
designates readings exceeding 500 cps on the downhole gamma probe as "anomalous".
Readers are cautioned that handheld spectrometer (scintillometer) and downhole gamma probe
readings are preliminary in nature, are not directly or consistently correlated to uranium grades
determined by chemical assay, and should not be relied upon as a substitute for analytical results. All
radiometric readings are subject to confirmation by laboratory assay.
Samples from the drill core are split into half sections on site. Where possible, samples are
standardized at 0.5 m downhole intervals. One-half of the split sample is sent to SRC Geoanalytical
Laboratories (an SCC ISO/IEC 17025: 2005 Accredited Facility) in Saskatoon, SK while the other half
remains on site for reference. Analysis includes a 63 element suite including boron by ICP-OES, uranium
by ICP-MS and gold analysis by ICP-OES and/or AAS.
The Company considers uranium mineralization with assay results of greater than 1.0 weight % U
₃
O
₈
as
"high grade" and results greater than 20.0 weight % U
₃
O
₈
as "ultra-high grade".
All depth measurements reported are downhole and true thicknesses are yet to be determined.
About Murphy Lake:
F4's 609-hectare Murphy Lake Property is located in the north-eastern corner of the Athabasca Basin,
30 km northwest of Orano's McClean Lake deposits, 5 km south of IsoEnergy's Hurricane Uranium
Deposit and 4 km east of Cameco's La Rocque Lake Uranium Zone where drill hole Q22-040
intersected 29.9% U
₃
O
₈
over 7.0 m. The 2022 maiden drill program at the Murphy Lake Property
consisted of 14 completed drillholes totaling 6,850 m; drill hole ML22-006 intersected 0.065% U
₃
O
₈
over 2.5 m from 322.5 m to 325.0 m, including 0.242% U
₃
O
₈
over 0.5 m.
Qualified Person
The technical information in this news release has been reviewed and approved on behalf of the
Company by Sam Hartmann, P.Geo., President & Chief Operating Officer of F4, and a qualified person
as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects.
This news release also refers to neighboring properties in which F4 Uranium has no interest, and the
Qualified Person has been unable to verify the information from those properties. Mineralization on those
neighboring properties is not necessarily indicative of mineralization on the Murphy Lake Property.
For additional information on the Murphy Lake Property, please refer to the National Instrument 43-101
Report titled "Technical Report For The Murphy Lake Project, NE Athabasca Basin, Saskatchewan,
Canada" effective March 20, 2024, available at
www.sedarplus.ca
.
About F4 Uranium Corp:
F4 Uranium is a Canadian uranium exploration company focused on the Athabasca Basin in northern
Saskatchewan, led by the management and exploration team behind multiple uranium discoveries in the
Basin, including most recently Patterson Lake North and Broach Lake. The project portfolio comprises
16 wholly owned properties totaling approximately 157,000 hectares, several of which sit near
established uranium deposits including Paladin's Triple R, NexGen Energy's Arrow and IsoEnergy's
Hurricane. The assets were spun out of F3 Uranium in 2024. F4's exploration program is split between
the west and east sides of the Athabasca Basin, with the Company operating as both an explorer and
project generator providing investors early-stage exposure to the Basin.
Contact Information
F4 Uranium Corp.
750-1620 Dickson Avenue
Kelowna, BC V1Y 9Y2
Investor Relations
Telephone: 778 484 8030
Email:
ON BEHALF OF THE BOARD,
"Ray Ashley"
Raymond Ashley, CEO
F4 Uranium Corp.
Forward-Looking Statements
This news release contains certain forward-looking statements within the meaning of applicable
securities laws. All statements that are not historical facts, including without limitation, statements
regarding future estimates, plans, programs, forecasts, projections, objectives, assumptions,
expectations or beliefs of future performance, including statements regarding the suitability of the
Properties for mining exploration, future payments, issuance of shares and work commitment funds
under the existing option agreement, and completion of the planned exploration program, are "forward-
looking statements". These forward-looking statements reflect the expectations or beliefs of
management of the Company based on information currently available to it. Forward-looking statements
are subject to a number of risks and uncertainties, including those detailed from time to time in filings
made by the Company with securities regulatory authorities, which may cause actual outcomes to differ
materially from those discussed in the forward-looking statements. These factors should be considered
carefully and readers are cautioned not to place undue reliance on such forward-looking statements. The
forward-looking statements and information contained in this news release are made as of the date
hereof and the Company undertakes no obligation to update publicly or revise any forward-looking
statements or information, whether as a result of new information, future events or otherwise, unless so
required by applicable securities laws.
The TSX Venture Exchange has not reviewed, approved or disapproved the contents of this press
release, and does not accept responsibility for the adequacy or accuracy of this release.
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