CanAlaska Uranium Ltd. - West McArthur Uranium Project drill results



    VANCOUVER, June 4 /CNW/ - CanAlaska Uranium Ltd. (TSX.V - CVV)
("CanAlaska" or the "Company") has received drill assays and detailed
geophysical information from the West McArthur Project winter drilling
campaign. This drilling information confirms not only structural breaks and
fault reactivation along the Grid 4 target area, but also hydrothermal
alteration and trace uranium mineralization in two holes at, and below, the
unconformity.

    West McArthur Uranium Project - Property Location Map
    http://www.canalaska.com/i/maps/060409maps/map_attach05_24_09.pdf

    The Cdn$1.9 million, 5-hole exploration program comprising a total of
4,751 metres of drilling, together with corresponding TDEM geophysical
surveys, tested a previously un-drilled zone located in the southern region of
the West McArthur Project. In this new area, VTEM magnetic and electromagnetic
airborne surveys, ground-based AMT and EM surveys identified a new,
well-defined, but variably-conductive zone, approximately 6 km in length
associated with apparent alteration in the sandstone column.
    This winter's exploration involved seven drill holes (WMA013 - WMA019)
along 4 km of the Grid 4 trend, however, two of the later drill holes were
terminated near surface due to drilling problems. The five successful drill
holes tested four discrete targets. Two of these provided trace uranium
mineralisation and associated geochemical alteration. The depth to
unconformity ranged from 807 to 833 metres.

    West McArthur Uranium Project - 2009 Drill Holes and 3D Audio Magneto
Telluric Resistivity Below Unconformity
    http://www.canalaska.com/i/maps/060409maps/map_attach05_30_09.pdf

    The first two drill holes of the program, WMA013 and WMA014, targeted a
conductive zone in the south-centre of the 4km conductive trend. These holes
encountered various levels of dravite and illite clay alteration as well as
zones of strong fracturing in the sandstone column (dravite indicates a higher
temperature of alteration, and is generally associated with uranium
mineralisation in the Athabasca Basin). There was no significant uranium
enrichment in these holes, however there were boron values in the sandstone
above the unconformity of up to 77 ppm (2-3 times background). Down-hole
geophysical probing indicated that the main target conductor was overshot by
the drilling. Further drilling will be required to test the main target, which
lies east of the hole WMA014) Drill hole WMA015, located 3.3 km northeast of
the first two holes, tested the northern end of a strong conductive target.
This drill hole encountered a zone of fracturation from 250 to 325 metres
depth. There was dravite and enhanced illite clay alteration in the top 400
metres of the drill hole. Significantly, there was additional dravite
alteration near the base of the sandstone and moderate fracturation in the
last 30 metres of the sandstone column above the unconformity. There was no
significant uranium enrichment intersected in the hole, but geochemical
enrichment was present with slightly-elevated boron from 100 to 500 metres
depth (40-60 ppm boron) and again from 750 metres to the unconformity (120-191
ppm boron). Further drilling to the northeast, in the stronger portion of the
conductor, is required.
    The most significant uranium mineralisation of the winter program was
intercepted in drill holes WMA016 and WMA019, located 400 metres and 1,200
metres south of drill holes 13 and 14. Core results indicated a significant
fault zone with vertical offsets between these two holes. The vertical offsets
of up to 15.4 metres were present at the unconformity and also in the
overlying sandstone. An offset of the trend of the geophysical conductor also
indicates horizontal structural movement. Progressively variable offsets in
the sandstone marker horizons also indicate that the inferred fault structure
could represent a mineralizing event with multiple periods of reactivation.
    Both drill holes WMA016 and WMA019 intersected favourable graphitic
horizons in the basement. Above the unconformity, there was clay alteration,
fracturation, and anomalous geochemistry in the sandstone Drill hole WMA016
exhibited generally-normal clay pattern, but with the presence of enhanced
higher temperature dravite near the unconformity. Above this immediate zone,
there were several fractured and friable zones between 680 metres and the
unconformity at 807 metres, with an increase of boron from 40 to 917 ppm at
the unconformity. There was also silicification from 750 to 785 metres and
anomalous trace element geochemistry for uranium (0.9 to 3.7 ppm), and nickel
(0.3-3.8 ppm) in the last 38 metres of the sandstone column. In the basement
rocks the drill hole intersected strongly-graphitic pelites with one section
from 909.0 to 909.5 metres assaying 0.055 % U(3)O(8).
    Drill hole WMA019, located 400 metres to the south of drill hole WMA016,
exhibited the best uranium intersection of the winter program. This hole
contained a generally normal clay pattern in the upper levels, again with
silicification from 780 to 830 metres, with elevated uranium (to 1 ppm) and
boron (to 90 ppm) in the last 14 metres of the sandstone column above the
unconformity. The basement of drill hole WMA019 is predominantly semi-pelites
with abundant leucosome. A sheared leucosome section of 2 metres from 880.2 to
882.2 assayed 0.034% U(3)O(8). A major graphite zone was intersected from 946
to 968 metres.
    In summary, the Company is very pleased with the test drilling results
from Grid 4. The mineralized and altered rocks encountered in the drill holes
show the potential for a uranium mineralizing system associated with graphitic
pelite horizons. The 4km-long zone tested this winter appears to have multiple
targets for future detailed evaluation. The Grid 4 area is only one of
multiple mineralized target zones identified on the property by CanAlaska and
Mitsubishi Development Pty Ltd. Continued exploration is expected on this and
the other target zones during the summer of 2009.
    All of the samples from the West McArthur project were submitted to Acme
Laboratories Vancouver, an ISO 9001:2000 accredited and qualified Canadian
Laboratory, for their Group 4B analysis. These samples were analysed for
uranium and multi-element geochemistry by tri-acid digestion and ICP-MS. The
samples were collected by CanAlaska field geologists under the supervision of
Dr. Karl Schimann, and were shipped in secure containment to the laboratories
noted above. Peter Dasler, M.Sc., P Geo. is the qualified technical person
responsible for this news release.

    About CanAlaska Uranium Ltd. -- www.canalaska.com

    CANALASKA URANIUM LTD. (CVV -- TSX.V, CVVUF -- OTCBB, DH7 -- Frankfurt)
is undertaking uranium exploration in twenty 100%-owned and two optioned
uranium projects in Canada's Athabasca Basin. Since September 2004, the
Company has aggressively acquired one of the largest land positions in the
region, comprising over 2,500,000 acres (10,117 sq. km or 3,906 sq. miles).
To-date, CanAlaska has expended over Cdn$50 million exploring its properties
and has delineated multiple uranium targets. The Company's geological
expertise and high exploration profile has attracted the attention of major
international strategic partners. Among others, Mitsubishi Development Pty
Ltd, a subsidiary of Japanese conglomerate Mitsubishi Corporation, has
undertaken to provide CanAlaska C$10 mil. in exploration funding for its West
McArthur Project. Exploration of CanAlaska's Cree East Project is also
progressing under a C$19 mil. joint venture with a consortium of Korean
companies led by Hanwha Corporation, and comprising Korea Electric Power
Corp., Korea Resources Corp. and SK Energy Co, Ltd. A Memorandum of
Understanding has also recently been executed with mining partner East
Resources Inc. to commence exploration on the NE Wollaston Project comprising
a potential 100,000 metres of drill testing.

    
    On behalf of the Board of Directors

    (signed)

    Peter Dasler, M.Sc., P.Geo.
    President & CEO, CanAlaska Uranium Ltd.
    

    The TSX Venture has not reviewed and does not accept responsibility for
the adequacy or accuracy of this release: CUSIP No. 13708P 10 2. This news
release contains certain "Forward-Looking Statements" within the meaning of
Section 21E of the United States Securities Exchange Act of 1934, as amended.
All statements, other than statements of historical fact, included herein are
forward-looking statements that involve various risks and uncertainties. There
can be no assurance that such statements will prove to be accurate, and actual
results and future events could differ materially from those anticipated in
such statements. Important factors that could cause actual results to differ
materially from the Company's expectations are disclosed in the Company's
documents filed from time to time with the British Columbia Securities
Commission and the United States Securities & Exchange Commission.





For further information:

For further information: Emil Fung, Director & V.P. - Corp. Dev., Tel:
(604) 688-3211, Email: info@canalaska.com

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CanAlaska Uranium Ltd.

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