Northern Orion Resources Inc.
TSX : NNO
AMEX : NTO

Northern Orion Resources Inc.

December 15, 2006 19:33 ET

Northern Orion Files 43-101 Report on Agua Rica Feasibility Study Update

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Dec. 15, 2006) - Northern Orion (TSX:NNO)(AMEX:NTO) is pleased to announce that it has filed its 43-101 report on the Feasibility Study Update of its 100% owned Agua Rica copper-gold-molybdenum project. The full report is available on the Company's website at www.northernorion.com.

David Cohen, President and CEO

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