Northern Orion Resources Inc.

Northern Orion Resources Inc.

September 28, 2005 19:44 ET

Northern Orion Announces Appointment of Richard Knight to the Board of Directors

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Sept. 28, 2005) - Northern Orion Resources Inc. (TSX:NNO)(AMEX:NTO) (the "Company") is pleased to announce the appointment of Richard (Dick) Knight to its Board of Directors effective September 26, 2005, further strengthening the Board as the Agua Rica project moves towards development. Mr. Knight brings a wealth of international operations and project development experience to the Board. He is a mining engineer by training and a graduate of the Royal School of Mines, London.

Mr. Knight has over 40 years of varied experience across all phases of the mining industry and in a wide spread of jurisdictions around the world. As the Executive Director - Development for North Limited in the mid 1990's, he was involved in the development of Alumbrera from the start of construction and was later responsible for the implementation of the billion dollar West Angelas iron ore project in the Pilbara region of Western Australia. Subsequently, as Managing Director of Inco Australia Management Pty Ltd., Mr. Knight was responsible for the reorganization and redesign of the Goro lateritic nickel project in New Caledonia, currently under construction. He remains a member of the Goro Project Steering Committee and a Senior Advisor to the parent company, Inco Limited. He is currently a non-executive Director of Zinifex Limited, a major Australian-based zinc-lead producer, and of St. Barbara Mines Limited, a gold mining company with operations in Western Australia.

"Dick will significantly enhance and strengthen the Northern Orion Board as we continue to move Agua Rica towards production, and we welcome him to the Board. His extensive experience in the successful development of large integrated mining projects and specific experience in the development of Alumbrera will be of immense value to the Company," said David Cohen, President and CEO of Northern Orion.

The Company has granted 300,000 incentive options to Mr. Knight for the purchase of common shares in its capital. The options are exercisable on or before September 26, 2012 at a price of $3.25 per share.

The Company continues to build upon its progress to date with a strategy to advance Agua Rica so as to achieve maximum monetary returns in the shortest practicable time frame. In addition, the Company continues to review and evaluate accretive acquisitions that could provide the Company with additional cash flow in the short to medium term.

David Cohen, President and CEO

Except for the statements of historical fact contained herein, certain information presented constitutes "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. Such forward-looking statements, including but not limited to, those with respect to the price of gold, silver and copper, the timing and amount of estimated future production, the potential and/or projected cash flow generated from production, costs of production, reserve determination and reserve conversion rates, and the potential for further equity dilution involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievement of Northern Orion to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Such factors include, among others, risks related to international operations, risks related to joint venture operations, the actual results of current exploration activities, actual results of current reclamation activities, conclusions of economic evaluations, uncertainty in the estimation of ore reserves and mineral resources, changes in project parameters as plans continue to be refined, future prices of gold, silver and copper, economic and political instability in Argentina, environmental risks and hazards, increased infrastructure and/or operating costs, labor and employment matters, and government regulation as well as those factors discussed in the section entitled "Risk Factors" in Northern Orion's Renewal Annual Information form attached to Northern Orion's latest Form 40-F on file with the United States Securities and Exchange Commission in Washington, D.C. Although Northern Orion has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Northern Orion disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Accordingly, readers should not place undue reliance on forward-looking statements.

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