NORSEMONT MINING FILES NI 43-101 TECHNICAL REPORT FOR PRELIMINARY ASSESSMENT OF CONSTANCIA CU-MO-AG PORPHYRY PROJECT, PERU

December 13, 2007

Vancouver and Lima, Peru – Norsemont Mining Inc. (“the Company”) (TSX: NOM, BVL: NOM) today announced the filing on SEDAR (www.sedar.com) of a Technical Report required under National Instrument 43-101 in respect of the Preliminary Assessment (Scoping Study) for the Company’s Constancia copper-molybdenum-silver porphyry project in southern Peru. The Technical Report was prepared by SRK Consulting. Norsemont previously announced the results of the Constancia Scoping Study in a news release dated November 5, 2007. The full Technical Report is also available by clicking here. About Norsemont Mining

Norsemont Mining is a Canadian mineral exploration and development company focused on the Constancia Cu-Mo-Ag deposit in southern Peru. Norsemont currently controls an undivided 64% interest in the Constancia Project, which interest is set to increase to 81% in the event that Rio Tinto does not exercise a claw-back right prior to January 31, 2008. Norsemont can then acquire the remaining 19% interest in Constancia by March 31, 2008 through a payment of US$8M to Rio Tinto. The Constancia Project has a 43-101 compliant indicated resource of 70M tonnes (0.8 Billion lbs Cu) and an inferred resource of 250M tonnes (2.8 Billion lbs Cu).

For more information please contact:

Patrick Evans
Norsemont Mining
Phone: 416-670-511
E-Mail: investors@norsemont.com
Web Site: www.norsemont.com