Northern Orion Resources Inc.
TSX : NNO
AMEX : NTO

Northern Orion Resources Inc.

August 13, 2007 17:14 ET

Revision of Conference Call Time for Northern Orion's Second Quarter Results

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Aug. 13, 2007) - Northern Orion (TSX:NNO)(AMEX:NTO) will release its second quarter results before the market opens on Tuesday, August 14, 2007 and will host a telephone conference call at 7:00 a.m. Pacific Time (10:00 a.m. Eastern) to discuss the results. The conference call may be accessed by dialing 1-800-319-4610 in Canada and the United States, or 1-604-638-5340 internationally.

The conference call will be archived for later playback until August 21, 2007 and can be accessed by dialing 1-800-319-6413 or 1-604-638-9010 and using the passcode 8157#. A live and archived audio webcast will also be available at www.northernorion.com.

David Cohen, President and CEO

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