Pike Zone Drillhole WMA079-01 Intersects 8.3 Metres at 24.82% eU3O8; Including 5.5 Metres at 37.09% eU3O8 Pike Zone Unconformity Uranium Mineralization Footprint Expanded to 250 Metres Strike Length and Remains Open CanAlaska Concludes Winter Drill Program on West McArthur Project; Drilling Schedule
Pike Zone Drillhole WMA079-01 Intersects 8.3
Metres at 24.82% eU3O8; Including 5.5 Metres
at 37.09% eU3O8
Pike Zone Unconformity Uranium Mineralization Footprint Expanded to 250 Metres Strike
Length and Remains Open
CanAlaska Concludes Winter Drill Program on West McArthur Project; Drilling Scheduled to
Resume in June 2025
Saskatoon, Saskatchewan--(Newsfile Corp. - April 22, 2025) -
CanAlaska Uranium Ltd. (TSXV: CVV)
(
OTCQX: CVVUF) (FSE:
DH7)
("
CanAlaska
" or the "
Company
") is pleased to report that it has
completed the winter drill program on the Pike Zone at the West McArthur project (the "Project") (Figure
1). During the program, the Company significantly expanded the high-grade footprint of the Pike Zone in
the gap area, highlighted by the best drillhole to date on the project, WMA079-01, which intersected
8.3
metres at 24.82% eU
3
O
8
, including 5.5 metres at 37.09% eU
3
O
8
at the unconformity. In addition, the
high-grade core of the Pike Zone was expanded to the west and east along strike, most notably in
previously reported drill hole WMA076-01 which intersected
14.5 metres at 12.20% eU
3
O
8
, including
5.0 metres at 34.38% eU
3
O
8
at the unconformity (see News Release dated February 5
th
, 2025).
Importantly, the Company advanced step out drilling along the C10S corridor to the west of the Pike
Zone, intersecting additional high-grade uranium, extending the known footprint of unconformity-
associated uranium mineralization to approximately 250 metres, which remains completely open.
Figure 1
– Project Location Map
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2864/249271_6b17e223c486cb02_002full.jpg
CanAlaska CEO, Cory Belyk, comments,
"Encouraging drill results continue to come from
CanAlaska's high-grade Pike Zone uranium discovery on the West McArthur Joint Venture project.
This winter, the CanAlaska team has delivered two of the best drillholes to date at Pike Zone,
highlighted most recently in drillhole WMA079-01. In addition, the winter drill program has infilled and
proven continuity of high-grade uranium mineralization in the centre part of the zone and extended
unconformity mineralization to at least 250 metres continuous strike length which remains open in
both directions. Results from the winter program are exceptional and provide tantalizing early drill
targets for the planned summer drill program starting in June. As in the winter, the CanAlaska team
will be focused on definition and expansion of this new high-grade uranium discovery located just 20
kilometres from the giant tier 1 McArthur River uranium mine."
2025 West McArthur Winter Drill Program Complete
The 2025 winter drill program on the West McArthur project is now complete. The program consisted of
29 unconformity tests, 22 of which contained uranium mineralization. The primary objective of the winter
program was continued expansion and delineation of the high-grade Pike Zone uranium discovery in
three main target areas. During the program, the Company significantly expanded the high-grade
footprint of the Pike Zone in the gap area where two previously interpreted high-grade pods are now
confirmed to be connected with additional high-grade uranium mineralization. Drillholes WMA079-01,
which intersected
8.3 metres at 24.82% eU
3
O
8
, including 5.5 metres at 37.09% eU
3
O
8
,
and
WMA074-04, which intersected
17.6 metres at 9.10% eU
3
O
8
, including 15.0 metres at 10.53%
eU
3
O
8
, highlight the high-grade mineralization in the gap target area (Figure 2; Figure 3; Figure 4). In
addition, the high-grade core of the Pike Zone was expanded to the west and east along strike during
the winter drill program, most notably in previously reported drill hole WMA076-01 which intersected
14.5
metres at 12.20% eU
3
O
8
, including 5.0 metres at 34.38% eU
3
O
8
at the unconformity (see News
Release dated February 5
th
, 2025).
Near the completion of the winter drill season, the Company advanced step out drilling along the C10S
corridor to the west of the Pike Zone, intersecting additional high-grade unconformity associated
uranium along L70W, representing a 50 metre step out to the west of the previously understood
mineralization footprint. Drillholes in this target area, highlighted by WMA095 which intersected 3.4
metres at 1.77% eU
3
O
8
, including 2.0 metres at 2.36% eU
3
O
8
, indicate that the hydrothermal
mineralizing system remains open to the west along the C10S corridor and highlights the potential for
additional mineralized pods along strike. Combined with the results from recently completed drill
programs, uranium mineralization has now been intersected over a total strike length of approximately
250 metres at the unconformity. Within that footprint, multiple drill fences outline a 130 metre long high-
grade pod, with additional uranium mineralization continuing along strike to the east and west. Uranium
mineralization remains open along strike in both directions.
As part of the 2025 exploration program, the Company has completed a ground-based electromagnetic
survey to investigate the extension of the C10S corridor toward the southwestern property boundary.
Historical EM coverage is being replaced with modern Stepwise Moving Loop Time Domain
Electromagnetics, utilizing the same survey design that led to the initial discovery of the Pike Zone.
Along trend to the northeast, the C10 corridor is host to CanAlaska's 42 Zone discovery, as well as
Cameco and Orano's high-grade Fox Lake uranium deposit (68.1 million pounds uranium at 7.99%
U
3
O
8
average grade
1 (refer to "References" below)
). The 15-kilometre-long C10 and C10S corridor are
sparsely drill-tested outside of Pike Zone and 42 Zone mineralization areas on the Project. Based on the
recent positive results and the proven uranium endowment of the C10 and C10S corridors, the Company
believes there is significant potential for discovery of additional unconformity-related high-grade zones of
mineralization.
Figure 2
– Pike Zone Mineralized Intercepts
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2864/249271_6b17e223c486cb02_003full.jpg
2025 West McArthur Summer Drill Program Plan
Commencing June of 2025, the Company will have three drills active on the West McArthur project to
achieve an estimated 15 additional unconformity target intersections. The drill rigs will be focused on
continued step outs along the C10S corridor from the Pike Zone to evaluate for additional zones of
uranium mineralization. To the west of the Pike Zone, the unconformity target area remains untested for
approximately 1,000 metres. To the east of the Pike Zone, the unconformity target area remains
untested for approximately 600 metres, where alteration and a fault structure were intersected in the
lower sandstone column. In addition, select infill targets within the currently understood footprint of the
Pike Zone will be completed during the summer program in support of consideration of a future maiden
mineral resource estimate. The Company will continue to optimize unconformity target intersections by
continued use of downhole mud-motor deviation technology for pilot holes and directional offcuts to
increase drilling efficiency, achieve target intercept accuracy, and to significantly lower drilling costs.
Assay results for the drill holes completed during the winter 2025 exploration program are pending.
Figure 3
– Section Through Pike Zone Gap Target Area
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2864/249271_6b17e223c486cb02_006full.jpg
The West McArthur project, a Joint Venture with Cameco Corporation, is operated by CanAlaska that
holds an 85.97% ownership in the Project. CanAlaska is sole-funding the 2025 West McArthur program
and will further increase its majority ownership in the Project as a result.
Figure 4
– WMA079-01 Core Photograph
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/2864/249271_6b17e223c486cb02_008full.jpg
Drillhole Details - Gap Target Area:
Two drillholes, WMA082-16 and WMA082-17, completed within the approximate 50 metre gap target,
have been previously reported (see News Release dated February 5
th
, 2025). Eleven additional
drillholes were completed in the gap target area during the winter exploration program to confirm
connectivity between two previously interpreted high-grade pods, ten of which contained uranium
mineralization (Table 1). The lower sandstone column in the gap target area is strongly bleached with
limonite alteration extending 70 to 110 metres above the unconformity. Within the lower sandstone
column, multiple metre-scale fault zones were intersected and are characterized by broken to blocky
core, large intervals of hydrothermal dravitic breccias with localized re-activation, and zones of quartz
dissolution. Near the unconformity, the fault zones are associated with strong silicification,
desilicification, clay, and sooty pyrite. Unconformity-associated uranium mineralization is characterized
by a combination of massive to semi-massive replacement style, blebby, and disseminated
mineralization associated with clay, sooty pyrite, and hematite. Basement-hosted uranium mineralization
is characterized by a combination of massive to semi-massive, blebby, disseminated, and structurally
controlled mineralization associated with hematite, chlorite, and clay alteration (Figure 4). The basement
within the gap target area is strongly clay and chlorite altered with localized dravitic-clay veins and
multiple re-activated fault zones. Within some drillholes, intervals of localized core loss were recorded
within the mineralization due to intense alteration and quartz dissolution.
Table 1 - Radiometric Equivalent Uranium Grades - Gap Target Area
DDH
From
(m)
To
(m)
Length
(m)
6
Average Grade
(% eU
3
O
8
)
7
WMA082-18
1
No Significant Mineralization Reported
WMA082-19
1,4
798.4
804.7
6.3
5.22
Including
5
799.6
803.3
3.7
8.52
WMA082-19
1,4
805.7
806.5
0.8
0.17
WMA082-19
1,4
808.1
813.7
5.6
0.52
WMA082-19
1,4
819.0
824.3
5.3
1.80
Including
5
820.2
821.2
1.0
7.28
WMA082-19
1,4
827.2
828.5
1.3
0.13
WMA082-20
1,4
820.3
820.6
0.3
0.38
WMA082-20
1,4
822.5
822.9
0.4
0.28
WMA082-20
1,4
833.5
834.4
0.9
2.72
WMA074-04
2,4
792.0
809.6
17.6
9.10
Including
5
794.1
809.1
15.0
10.53
WMA074-04
2,4
819.8
820.6
0.8
0.34
WMA074-05
2,4
798.2
800.0
1.8
0.51
WMA074-06
2,4
795.0
801.2
6.2
1.31
Including
5
797.2
800.1
2.9
2.13
WMA079-01
3,4
810.2
818.5
8.3
24.82
Including
5
812.0
817.5
5.5
37.09
WMA079-01
3,4
824.0
826.0
2.0
0.11
WMA079-02
3,4
813.0
820.1
7.1
3.44
Including
5
815.1
818.2
3.1
6.70
WMA079-02
3,4
824.7
825.8
1.1
0.27
WMA079-03
3,4
804.0
807.6
3.6
0.34
WMA079-03
3,4
808.5
810.6
2.1
0.13
WMA079-03
3,4
812.4
827.1
14.7
8.33
Including
5
814.9
823.6
8.7
13.07
WMA079-03
3,4
831.7
832.2
0.5
0.52
WMA079-04
3,4
803.0
814.1
11.1
0.97
WMA079-04
3,4
815.4
820.3
4.9
0.47
WMA079-04
3,4
825.9
831.4
5.5
1.64
Including
5
826.1
828.4
2.3
2.88
WMA079-04
3,4
834.6
838.2
3.6
1.86
Including
5
836.2
836.9
0.7
6.87
WMA079-05
3,4
802.9
821.5
18.6
3.21
Including
5
804.6
806.7
2.1
13.56
Including
5
816.1
820.9
4.8
4.41
WMA079-05
3,4,5
829.4
829.9
0.5
10.17
DDH
From
(m)
To
(m)
Length
(m)
6
Average Grade
(% eU
3
O
8
)
7
1
.
WMA082-18, WMA082-19, WMA082-20 were drilled at an azimuth of 295˚ with an inclination of -79.3˚, collared at 477,345 mE / 6,396,525
mN, 602 m A.S.L. (UTM NAD83 Z13N) as daughter holes from WMA082. WMA082-18 intersected the unconformity at 812.5 metres,
WMA082-19 at 799.6 metres, and WMA082-20 at 801.5 metres.
2
.
WMA074-04, WMA074-05, WMA074-06 were drilled at an azimuth of 355˚ with an inclination of -77.0˚, collared at 477,241 mE / 6,396,512
mN, 598 m A.S.L. (UTM NAD83 Z13N) as daughter holes from WMA074. WMA074-04 intersected the unconformity at 794.5 metres,
WMA074-05 at 805.3 metres, and WMA074-06 at 795.0 metres.
3
.
WMA079-01, WMA079-02, WMA079-03, WMA079-04, WMA079-05 were drilled at an azimuth of 295˚ with an inclination of -78.5˚, collared
at 477,359 mE / 6,396,539 mN, 602 m A.S.L. (UTM NAD83 Z13N) as daughter holes from WMA079. WMA079-01 intersected the
unconformity at 812.0 metres, WMA079-02 at 814.0 metres, WMA079-03 at 809.0 metres, WMA079-04 at 803.0 metres, and WMA079-05
at 803.7 metres.
4
.
Intersection interval is composited above a cut-off grade of 0.1% eU
3
O
8
with a maximum of 1.0 m of internal dilution.
5
.
Intersection interval is composited above a cut-off grade of 2.0% eU
3
O
8
with a maximum of 1.0 m of internal dilution.
6
.
All reported depths and intervals are drill hole depths and intervals, unless otherwise noted, and do not represent true thicknesses, which
have yet to be determined.
7
.
Radiometric equivalent ("eU
3
O
8
") derived from a calibrated gamma downhole probe.
DDH
From
(m)
To
(m)
Length
(m)
6
Average Grade
(% eU
3
O
8
)
7
Drillhole Details - Eastern Extension Target Area:
One drillhole, WMA076-01, completed within the eastern target area has been previously reported (see
News Release dated February 5
th
, 2025). Eight additional drillholes were completed in the eastern
target area during the winter exploration program to attempt to expand uranium mineralization to the east
of the high-grade pod, five of which contained uranium mineralization (Table 2). The lower sandstone
column in the eastern target area is strongly bleached with limonite alteration extending 80 to 100 metres
above the unconformity. Within the lower sandstone column, multiple metre-scale fault zones were
intersected and are characterized by broken to blocky core, intervals of hydrothermal dravitic breccias
with localized re-activation, and zones of quartz dissolution and clay replacement. Where the fault zones
are intersected near the unconformity, they are associated with silicification, desilication, clay, and sooty
pyrite. Unconformity-associated uranium mineralization is characterized by blebby and disseminated
mineralization associated with clay and sooty pyrite. Basement-hosted uranium mineralization is
characterized by blebby, disseminated, and structurally controlled mineralization associated with
hematite, chlorite, and clay alteration. The basement within the eastern target area is clay and chlorite
altered with re-activated fault zones throughout the graphitic pelite. Within select drillholes, intervals of
localized core loss were recorded within the mineralization due to intense alteration and quartz
dissolution.
Table 2 - Radiometric Equivalent Uranium Grades Eastern Extension Target Area
DDH
From
(m)
To
(m)
Length
(m)
5
Average Grade
(% eU
3
O
8
)
6
WMA076-02
1,3
791.0
791.6
0.6
0.15
WMA076-02
1,3
797.7
798.3
0.6
0.13
WMA076-02
1,3
800.3
800.9
0.6
0.33
WMA076-02
1,3
803.7
804.7
1.0
0.33
WMA076-02
1,3
807.1
810.5
3.4
0.52
WMA076-03
1
No Significant Mineralization Reported
WMA076-04
1,3
802.3
804.6
2.3
0.15
WMA075-03
2
No Significant Mineralization Reported
WMA075-04
2,3
796.6
796.9
0.3
0.31
WMA075-04
2,3
802.6
804.2
1.6
1.63
Including
4
803.3
803.7
0.4
3.38
WMA075-05
2,3
797.4
798.4
1.0
0.54
WMA075-06
2,3
793.1
794.1
1.0
0.33
WMA075-06
2,3
798.8
800.8
2.0
0.30
WMA075-07
2,3
No Significant Mineralization Reported
1
.
WMA076-02, WMA076-03, WMA076-04 were drilled at an azimuth of 325˚ with an inclination of -75.0˚, collared at 477,340 mE / 6,396,538
mN, 602 m A.S.L. (UTM NAD83 Z13N) as daughter holes from WMA076. WMA076-02 intersected the unconformity at 800.5 metres,
WMA076-03 at 799.1 metres, and WMA076-04 at 803.1 metres.
2
.
WMA075-03, WMA075-04, WMA075-05, WMA075-06, WMA075-07 were drilled at an azimuth of 318˚ with an inclination of -82.5˚, collared
at 477,366 mE / 6,396,602 mN, 601 m A.S.L. (UTM NAD83 Z13N) as daughter holes from WMA075. WMA075-03 intersected the
unconformity at 787.8 metres, WMA075-04 at 787.2 metres, WMA075-05 at 787.1 metres, WMA075-06 at 786.3 metres, and WMA075-07
at 794.4 metres.
3
.
Intersection interval is composited above a cut-off grade of 0.1% eU
3
O
8
with a maximum of 1.0 m of internal dilution.
4
.
Intersection interval is composited above a cut-off grade of 2.0% eU
3
O
8
with a maximum of 1.0 m of internal dilution.
5
.
All reported depths and intervals are drill hole depths and intervals, unless otherwise noted, and do not represent true thicknesses, which
have yet to be determined.
6
.
Radiometric equivalent ("eU
3
O
8
") derived from a calibrated gamma downhole probe.
Drillhole Details - Western Extension Target Area:
Two drillholes, WMA094-04 and WMA094-05, completed within the western extension target, have been
previously reported (see News Release dated February 5
th
, 2025). Two additional drillholes were
completed in the western extension target area during the winter exploration program in an attempt to
expand uranium mineralization to the west of the high-grade pod, one of which contained uranium
mineralization (Table 3). The lower sandstone column in the western extension target area is strongly
bleached with limonite alteration extending 80 to 90 metres above the unconformity. Within the lower
sandstone column, multiple metre-scale fault zones were intersected and are characterized by broken to
blocky core, large intervals of hydrothermal dravitic breccias with localized re-activation, zones of quartz
dissolution, and localized intervals of clay replacement. Near the unconformity, the fault zones are
associated with clay replacement, silicification, and localized sooty pyrite alteration. Basement-hosted
uranium mineralization is characterized by disseminated and structurally-controlled mineralization
associated with chlorite, hematite, and clay. The basement within the western extension target area is
clay and chlorite altered with several re-activated fault zones.
Table 3 - Radiometric Equivalent Uranium Grades Western Extension Target Area
DDH
From
(m)
To
(m)
Length
(m)
3
Average Grade
(% eU
3
O
8
)
4
WMA094-06
1
No Significant Mineralization Reported
WMA094-07
1,2
811.8
812.1
0.3
0.23