CanAlaska, Uranium Prospects, and Yellowcake: Grease River Uranium Project Summary of Summer Work and Preliminary Results



    VANCOUVER, Sept. 19 /CNW/ - CanAlaska Uranium Ltd. (TSX-V: CVV) - The
Company is pleased to report on the completion of detailed airborne surveys in
the Grease River area, as well as an initial two and half months of ground
exploration on the project following an accelerated commitment of $1.3 M to
summer surveys from Yellowcake PLC as a result of the recent agreement with
Uranium Prospects Plc, which is now responsible for the majority of the
funding for exploration at Grease River.
    The current work, financed under the Uranium Prospects / Yellowcake PLC
agreement, and operated by CanAlaska, under the direction of Dr Karl Schimann,
combined the airborne surveys with ground prospecting and mapping. The project
area covers an extensive belt of uranium showings, adjacent to the northern
edge of the Athabasca Basin. Regionally this area is characterised by
Uranium-Thorium anomalies in lake sediments. Very high uranium values (over
1000 ppm) reported in historical lake sediment samples indicate the presence
of further uranium mineralization hosted in basement rocks.

    http://www.Canalaska.com/i/maps/GreaseRiver2007-09-17.pdf

    CanAlaska considers the project area to have potential for both
basement-hosted unconformity deposits as well as bulk tonnage Rossing style
deposits. The extensive nature of the uranium mineralization in lake sediments
and the early success from past regional reconnaissance style exploration,
give strong indications for definition of drill targets from the summer
campaign. The Grease River project area is easily accessible by air from the
road-head and airport at Stony Rapids, located to the south of the project
area. The basement rocks in this area are interpreted to have been stripped of
any overlying Athabasca sandstone, exposing structurally controlled uranium
replacement zones, as well as possible larger tonnage intrusive related
targets.

    Grease River Airborne

    CanAlaska contracted Terraquest Ltd to perform the airborne survey
program. The 6,900 line-km airborne survey on the Grease River property
included high resolution aero-magnetics, horizontal gradiometer, gamma
spectrometry, and XDS/VLF - EM, and provided a large number of discrete
targets as well as larger formational related uranium enrichment events. The
airborne survey was completed early in the summer and preliminary
interpretation of the radiometric data produced some 250 anomalies for field
verification by prospectors, or 'ground truthing'. This initial work has
identified a number of new showings or radioactive anomalous areas.

    Lake Sediment Sampling

    The Grease River claims were staked over combined lake sediment and
radiometric anomalies straddling major geological domain boundaries, including
the Grease River Shear Zone. The area is known for very high uranium in lake
sediments (over 1000 ppm U) as well as several in-situ uranium showings with
values up to 1.6 % U(3)O(8).
    CanAlaska's staff sourced and reviewed extensive historical exploration
data which included abundant lake sediment sampling over most of the property
CanAlaska's lake sediment survey in 2007 completed the area not previously
surveyed and also included several hundred validation samples in areas of
historical anomalies.

    Mapping and Prospecting

    The 2007 work programme of mapping and prospecting focused on all three
claim blocks and identified five interesting showings:

    Bradley Lake Occurrence

    Strike perpendicular fractures filled with veined pitchblende
mineralization hosted within patchy yellow U-stained pink to whitish-pink
coarse-grained quartz-feldspar pegmatitic dykes intruding parallel to the
foliation of sheared metasediments. Fractures yield readings of between 1,500
to +15,000 cps within 0.2 to 0.8 cm wide pitchblende veinlets and occasional
pitchblende blebs up to 1.5 cm in diameter associated with biotite 'books'
within the pegmatites.

    Cochrane Lake Occurrence

    Pink to whitish pink coarse-grained feldspar-quartz +/- biotite
pegmatitic dykes crosscutting biotite-feldspar-quartz gneiss near the contact
with a quartz-monzonite intrusion. Local zones yield readings of between 2,000
and 9,000 cps often associated with biotite lenses within the pegmatite.

    Grease River Occurrence

    Zones of increased radioactivity of between 1,000 to +9,000 cps hosted
within silicified leucogranite dykes that crosscut biotite-quartzo-feldspathic
gneiss parallel to foliation. The silicified leucogranite intrusions are
composed primarily of 45% to 55%, 0.4 cm to 1 cm diameter, randomly oriented,
subhedral to euhedral, white plagioclase feldspar crystals supported within a
quartz and quartzo-feldspathic groundmass that also contains randomly oriented
biotite clots and numerous patches of U-staining.
    These leucogranite dykes occur along, and emanate from, the contact zone
of a large quartz-monzonite intrusion. Zones of higher radioactivity often
occur associated with large biotite clots and within fractures of the
leucogranite intrusive dykes.

    North Stolar Lake Occurrence

    Pitchblende mineralization occurring as fracture-filled veinlets and 0.5
to 1 cm diameter occasional blebs of pitchblende hosted in lenses of biotite
schist within sheared and intensely foliated granodiorite. The blebs of
pitchblende often yield +9,000 cps. Numerous zones within the granodiorite
give readings of between 1,300 to +9,000 cps with no readily apparent
pitchblende mineralization.

    Tait Lake Area

    Numerous zones that yield radiometric readings of 300 to 2,500 cps hosted
within medium-grained granite and coarse-grained quartz-feldspar pegmatitic
dykes that crosscut biotite-quartzo-feldspathic to biotite-quartz-feldspar
amphibolitic gneiss.
    The 2007 exploration programme, albeit limited to two and a half months
of field work, has demonstrated the high potential of the Grease River claims
for uranium. It confirmed the strong uranium enrichment in the lake sediment
and soils of the area, indicating a regional uranium enrichment and that the
uranium is very mobile. This constitutes a very favourable environment for
hydrothermal and structure-related enrichment, such as found within the
basement in the Eastern Athabasca Basin (Eagle Point, Millenium). The Grease
River occurrence described above suggests that a Rossing-type potential may be
present as well, enrichment peripheral to intrusions. Further field
investigations will be undertaken with the aim of identifying drill targets.
    The person responsible for this news release is Peter Dasler, P.Geo.

    About CanAlaska Uranium Ltd. - www.canalaska.com

    CanAlaska Uranium (CVV - TSX.V, CVVUF - OTCBB, DH7 - Frankfurt) is
undertaking uranium exploration in seventeen 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). In
2005/2006, CanAlaska expended over Cdn$15 million exploring its properties in
the Athabasca Basin and has delineated multiple uranium targets. Initial
drilling results from the West McArthur Project revealed uranium
mineralization and significant zones of hydrothermal alteration, indicative of
a favourable environment for uranium deposition. Active drilling and
exploration continues in the Summer, 2007 exploration season at West McArthur
and at 2 other significant projects. The Company's high profile in the
prominent Athabasca Basin has attracted the attention of major international
strategic partners. Mitsubishi Development Pty., a subsidiary of Japanese
conglomerate Mitsubishi Corporation, has undertaken to provide CanAlaska
C$11 mil. in exploration funding to earn 50% of the West McArthur Project. An
MOU has also been executed with Hanwha Corporation, a S. Korean conglomerate,
to enter into joint exploration of CanAlaska's Cree East Project.

    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, Vice President, Corp. Dev., Tel:
(604) 685-1870, Toll Free (N. America): 1-800-667-1870, Email:
info@canalaska.com

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CanAlaska Uranium Ltd.

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