Northwestern Mineral Ventures, Inc. (fka NWTMF)

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NORTHWESTERN MINERAL
Northwestern confirms higher-grade uranium mineralization on Niger properties; submits over-limit samples for re-analysis
4/30/2007
TORONTO, April 30, 2007 /PRNewswire-FirstCall via COMTEX News Network/ --

Northwestern Mineral Ventures Inc. (TSXV: NWT; OTCBB: NWTMF) is pleased to announce additional assay results from rock samples collected during a first-pass reconnaissance exploration of airborne anomalies on its 100%-owned In Gall and Irhazer uranium properties in Niger. Findings reveal the highest levels of uranium mineralization discovered on the properties to date, with values of up to 0.18% U(3)O8. In addition, several samples exceeded the 0.24% U(3)O(8) detection limit in tests that are commonly used to analyze samples from Niger. The above-limit samples have been scheduled for further analysis using a technique that can accurately measure higher uranium values.

"The initial rock sample results, which we reported in early March, confirmed uranium mineralization in one highly prospective area. These new findings include even greater uranium values from a new discovery zone that is situated 4.0 miles (6.3 kilometers) east of the original area of mineralization," said Marek J. Kreczmer, President and CEO of Northwestern. "Based on results to date, we believe that these two areas are part of a larger mineralized system."

The new discovery, called the Bingo zone, is associated with a radioactive structural dome that is geologically similar to others that have been proven to host uranium mineralization in Niger. It is favorably located on a fault that contains uranium deposits along strike elsewhere in the district.

Results

Assay results from 16 surface rock chip samples, which were collected from outcrops covering a large area during a first-pass reconnaissance exploration of anomalies identified during an earlier airborne survey, reveal uranium values of up to 0.18% U(3)O(8). Details of the 10 assays that returned values above 0.09% U(3)O(8) are provided in the table below.


-------------------------------------------------------------------------
Sample ID Scintillometer Uranium U(3)O(8) U(3)O(8)
Intensity (cps) (U_IMS40B) (ppm) (%)
(ppm)
-------------------------------------------------------------------------
ING-A10-001 8000 greater greater greater
than 2000 than 2358 than 0.24
-------------------------------------------------------------------------
ING-A10-002 37000 greater greater greater
than 2000 than 2358 than 0.24
-------------------------------------------------------------------------
ING-A10-003 17000 greater greater greater
than 2000 than 2358 than 0.24
-------------------------------------------------------------------------
TNX_002 26000 greater greater greater
than 2000 than 2358 than 0.24
-------------------------------------------------------------------------
TNX_004 350 greater greater greater
than 2000 than 2358 than 0.24
-------------------------------------------------------------------------
FAX_001 greater 1555 1833 0.18
than 9999
-------------------------------------------------------------------------
IRZ-A07-001 3750 1109 1308 0.13
-------------------------------------------------------------------------
TNX_001 6993 1018 1200 0.12
-------------------------------------------------------------------------
AZX_100 3600 760 904.8 0.09
-------------------------------------------------------------------------
ING-A16-001 3000 757 893 0.09
-------------------------------------------------------------------------

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.

Findings from the re-analysis of over-limit samples will be announced once they have been received. SGS Lakefield Research Africa has advised Northwestern that the expected minimum turnaround time for these results is 5-6 weeks. As such, results are not expected until June at the earliest.

In Gall and Irhazer cover 988,000 acres (4,000 square kilometers) of highly prospective land within the same stratigraphy as two operating uranium mines that together provide almost 10% of worldwide production. Niger currently ranks as one of the world's top producers of uranium.

With excellent results from rock sampling, reconnaissance exploration and an airborne survey, Northwestern anticipates the commencement of drilling before the rainy season. The drill remains en route to Africa from France, having been delayed because of mechanical problems with the ship transporting the equipment. Northwestern is making arrangements to have the drill arrive in Niger as quickly as possible. Drilling is expected to commence as soon as the drill arrives and the company receives permission from the Government of Niger to commence drilling. Northwestern will provide an update as developments warrant.

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 Research Africa by Aqua Regia Digest followed by ICP-OES. Analysis of all samples is carried out using Standard Reference Materials and a minimum of 10% of samples are analyzed in duplicate. Re-analysis is being conducted by SGS using borat fusion followed by x-ray fluorescence. Northwestern and SGS both maintain comprehensive and independent Quality Control/Quality Assurance programs.

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 March 15, 2006, March 1, 2006, 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.

SOURCE Northwestern Mineral Ventures Inc.

Marek J. Kreczmer, M.Sc., P.Eng., President and CEO, [phone], [e-mail] http://www.prnewswire.com
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