Northwestern confirms uranium occurrences on Niger properties



    TORONTO, March 1 /CNW/ - Northwestern Mineral Ventures Inc. (TSXV: NWT;
OTCBB: NWTMF) is pleased to announce initial assay results from rock samples
collected during a first-pass reconnaissance program on its 100%-owned uranium
properties in Niger. The results confirm uranium mineralization associated
with several of the anomalies identified during an earlier airborne survey.
    "We are extremely excited that ongoing exploration work has confirmed the
presence of uranium on our Niger properties," said Marek J. Kreczmer,
President and CEO of Northwestern. "These initial rock sample results further
validate our belief that In Gall and Irhazer host the structures and
sedimentary units that commonly host uranium deposits in Niger. We look
forward to commencing a drill program in the spring to further test these and
other targets."

    Initial Results

    Assay results from 61 surface grab samples, collected during a brief
reconnaissance exploration of airborne anomalies, reveal uranium values of
almost 0.1% U(3)O(8)(AZX_100). Details of the 13 assays that returned values
above 0.03% U(3)O(8) are provided in the table below.
    "These uranium values are significant because surface assay levels can be
impacted by weathering oxidation in desert environments, which can cause
surface uranium depletion. As such, the extent of the uranium grades on our
properties has yet to be fully revealed," adds Mr. Kreczmer.
    Producing mines and deposits in Niger typically grade from 0.1% to 0.42%
U(3)O(8), with the highest grades being mined at greater depths.

    
    -------------------------------------------------------------------------
                                          Uranium
                    Scintillometer       (U_IMS40B)      U(3)O(8)    U(3)O(8)
    Sample_ID       Intensity (cps)        (ppm)          (ppm)        (%)
    -------------------------------------------------------------------------
     AZX_100             3600               760           904.8        0.090
    -------------------------------------------------------------------------
     INX_011             4080               690           821.4        0.082
    -------------------------------------------------------------------------
     AZX_101             2300               690           821.4        0.082
    -------------------------------------------------------------------------
     AZX_105             5200               650           773.8        0.077
    -------------------------------------------------------------------------
     INX_010             4080               640           761.9        0.076
    -------------------------------------------------------------------------
     INX_007             1800               450           535.7        0.054
    -------------------------------------------------------------------------
     INX_017             1500               360           428.6        0.043
    -------------------------------------------------------------------------
     INX_014             2020               320           381.0        0.038
    -------------------------------------------------------------------------
     INX_003             2600               300           357.1        0.036
    -------------------------------------------------------------------------
     INX_005             2200               300           357.1        0.036
    -------------------------------------------------------------------------
     CNX005              2100               300           357.1        0.036
    -------------------------------------------------------------------------
     AZX_205             2375               290           345.2        0.035
    -------------------------------------------------------------------------
     INX_013             1400               270           321.4        0.032
    -------------------------------------------------------------------------
    

    RSG Global is currently conducting a systematic evaluation of 17
top-ranked near-surface uranium anomalies, which are on trend with known
uranium deposits and occurrences. Areas are being evaluated in order of
priority, with revisions made in the field based on results of the
reconnaissance program. Rock samples were collected during a first-pass
reconnaissance program, which was initiated in November 2006. Additional
results from ongoing exploration work will be announced as they are received.

    Uranium Deposits in Niger

    According to the World Nuclear Association, Niger is one of the world's
top uranium producers with all of its uranium currently being produced from
two mines that are operated by Areva (Cogema). The Somair mine in Arlit and
Cominak in Akouta together produced 3,093 metric tonnes of uranium in 2005,
accounting for almost 10% of annual global production. Somair is an open pit
mine that, since 1971, has produced more than 40,000 metric tonnes of uranium
at an average assay of 2 kg of uranium oxide per ton of ore, (approximately
0.2% U(3)O(8)). Cominak has produced over 48,000 metric tonnes from
underground mines, with the average grade ranging from 4.5 to 5 kg of uranium
oxide per metric ton of ore (approximately 0.45-0.5% U(3)O(8)).
    Located within the same stratigraphy as Somair and Cominak,
Northwestern's Irhazer and In Gall concessions were selected for their
favorable geology and exploration potential. Each concession is 494,000 acres
(200,000 hectares) in size, representing a total land position of 988,000
acres (400,000 hectares).

    Quality Assurance

    Fieldwork in Niger is being conducted under the supervision of Abdelkarim
Aksar, P.Geo., Northwestern's Niger Project Manager. Laboratory analysis was
conducted by SGS Lakefield based out of South Africa by Aqua Regia Digest
followed by ICP-OES.

    ABOUT NORTHWESTERN:

    Northwestern Mineral Ventures (www.northwestmineral.com) is an
international resource exploration company with an experienced management
team. The company is focused on properties in Niger and Canada with potential
uranium targets. Northwestern also has a precious and base metal property in
Mexico. Northwestern is listed on the NASD Bulletin Board under the symbol
"NWTMF" and the TSX Venture Exchange under the symbol "NWT."

    The TSX Venture Exchange has not reviewed and does not accept
    responsibility for the adequacy or accuracy of this news release.

    This news release includes certain "forward looking statements" within
the meaning of the United States Private Securities Litigation Reform Act of
1995. Without limitation, statements regarding potential mineralization and
resources, exploration results, and future plans and objectives of the Company
are forward looking statements that involve various degrees of risk. The
following are important factors that could cause the Company's actual results
to differ materially from those expressed or implied by such forward looking
statements: changes in the worldwide price of mineral commodities, general
market conditions, risks inherent in mineral exploration, risks associated
with development, construction and mining operations, the uncertainty of
future profitability and the uncertainty of access to additional capital.
    Potential quantity and grade is conceptual in nature, there has been
insufficient exploration to define a mineral resource on Northwestern's Niger
properties and it is uncertain if further exploration will result in the
target being delineated as a mineral resource.
    Additional information about Northwestern's Niger properties is contained
in press releases dated December 14, 2006, October 25, 2006, September 29,
2006, September 22, 2006, June 15, 2006, May 23, 2006, May 2, 2006, March 27,
2006 and March 8, 2006.





For further information:

For further information: Marek J. Kreczmer, M.Sc., P.Eng., President and
CEO, (866) 437-9551, info@northwestmineral.com

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NWT Uranium Corp.

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