Montreal, QC - June 17, 2011 - Osisko Mining Corporation ("Osisko")(TSX:OSK)(FRANKFURT:EWX) has notified Clifton Star Resources Inc. of its decision to terminate its participation in the Duparquet Mining Camp Project in accordance with the Option and Joint Venture Agreement (the "Agreement"). Under the terms of the Agreement, a 30-day notice is required prior to the termination becoming effective.
About Osisko Mining Corporation
Osisko Mining Corporation is currently commissioning the Canadian Malartic Gold Project, evaluating adjacent areas for a large-scale open pit, bulk-tonnage mining operation and pursuing exploration of the Hammond Reef Gold Project in Northern Ontario.
Osisko Mining CorporationJohn BurzynskiVice-President Corporate DevelopmentTel.: (416) 363-8653www.osisko.com
or
Sylvie Prud'hommeInvestor RelationsTel.: (514) 735-7131Toll free : 1-888-674-7563
Renmark Financial Communications Inc.John Boidman: jboidman@renmarkfinancial.com Erica Lomonaco: elomonaco@renmarkfinancial.com Tel.: (514) 939-3989 or (416) 644-2020 www.renmarkfinancial.com
Renmark Financial Communications Inc.
Montreal (Head Office): 3400 De Maisonneuve Blvd. West, Suite 1050, Montr�al, Qu�bec, H3Z 3B8Tel.: (514) 939-3989 Fax: (514) 939-3717Toronto: 121 King Street West, Suite 1140, Toronto, Ontario, M5H 3T9Tel.: (416) 644-2020 Fax: (416) 644-2021
Website: www.renmarkfinancial.com - Email: info@renmarkfinancial.com
Osisko Mining is a gold exploration company based in Canada.
Osisko Mining holds various exploration projects in Argentina, in Brazil and in Canada.
Its main asset in production is MALARTIC in Canada and its main exploration properties are GOLDBORO, SLEITAT, JC - SMART SKARNS, HAMMOND REEF, MALARTIC CHL GOLD PROPERTY, DUPARQUET and CLEMENT LAKE in Canada, EL POTOSI and SANTA CLARA / CERRO BONITO in El Salvador, CERRO CONDORINI and COAL CREEK in Peru, CASTELO DOS SONHOS in Brazil and FAMATINA in Argentina.