Toronto – September 14, 2004 - Northwestern Mineral Ventures Inc. (TSX-V: NWT, OTCBB: NWTMF, Frankfurt: NMV) and Fronteer Development Group Inc. (TSX: FRG, Frankfurt: FRR) are pleased to announce that a recent drill program on their 50-50 joint venture Longtom property in the Bear Province of Canada’s Northwest Territories has intersected high grade uranium mineralization.Drilling intersected: 1.68% U3O8 over 1.0 meters at a down hole depth of 80 meters.This uranium intercept was part of a broader interval that returned 0.56% U3O8 over 3.0 meters. 0.16% U3O8 over 1.0 meters was intersected at a depth of 51 meters in the same hole. Previous drill campaigns by other operators focused on the copper-gold potential of the property but also intersected anomalous to high grade uranium.Within a 300-meter radius of the new high grade discovery, eight historic drill holes intersected uranium mineralization with indicated values ranging between: 0.21% U3O8over 0.6 meters at a down hole depth of 44.5 meters and 0.48% U3O8 over 1.5 meters at a down hole depth of 59 meters. Based on recent drill hole results and historical records in the surrounding area, there are indications of a near surface uranium system, that has both size and high grade potential.The world average grade from producing uranium mines is 0.15% U3O8. “Northwestern is encouraged by the strength of these results indicating the existence of high grade uranium mineralization at our joint venture Longtom property,” said Kabir Ahmed, President and CEO of Northwestern Mineral Ventures. “Over the next decade, uranium supply is expected to fall short of demand and the current production shortfall is more than 300 million pounds.As such, there is a very real need for new primary mine production. We look forward to working with Fronteer to further define and develop this project.” The summer 2004 program at the Longtom property completed 2,100 meters of drilling to test the copper-gold-silver-uranium targets based on surface mineralization, geophysical data and historic drilling results.Other significant results include: 0.19% copper over 15 meters at a down hole depth of 37 meters and 0.14% cobalt over 6 meters at a down hole depth of 185 meters. Northwestern is earning a 50% interest in the Longtom property by completing $5.0 million in exploration work by September 2008.Based on the current and projected price of uranium, Northwestern’s management team has asked Fronteer, as operator, to prepare a follow-up program on the Longtom property. This program will explore and expand uranium targets over the course of the next year. ABOUT NORTHWESTERN: Northwestern Mineral Ventures is an emerging international exploration company with an experienced management team.The company is focused on properties with potential iron-oxide copper-gold uranium targets and currently has interests in Mexico’s Durango and Sinaloa provinces and Canada’s Northwest Territories. ABOUT FRONTEER: Fronteer is a Discovery-Stage exploration company with clear and immediate growth potential.With an outstanding project portfolio and a solid management team, Fronteer is poised for success. FURTHER INFORMATION: Investor Relations (866) 437-9551 http://www.northwestmineral.com Dr Rick Valenta P.Geo is the qualified person for this project. 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 that involve various degrees of risk. The following are important factors that could cause Fronteer’s and/or Northwestern’s actual results to differ materially from those expressed or implied by such forward looking statements: changes in the world wide 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. Samples were analyzed by ALS Chemex.
