Osisko Previews Q1 2013 Canadian Malartic Operating Results

MONTREAL, QUEBEC--(Marketwired - April 9, 2013) - Osisko Mining Corporation (the "Company" or "Osisko") (TSX:OSK)(FRANKFURT:EWX) today reports a preview of Canadian Malartic operational results for the quarter ended March 31, 2013.

Q1 Highlights

• Record gold production of 106,047 ounces
  
  
• Record total tonnage processed of 4,234,001 t
  
  
• Record average daily tonnage processed of 47,044 tpd (based on 90 calendar days)
  
  
• Record average daily tonnage processed of 48,389 tpd (based on 87.5 operational days)
  
  
• Record one-month gold production of 42,521 ounces (March)
  
  
• Record one-month tonnage processed of 1,594,608 t (March)
  
  
• Record one-month average tonnage processed of 51,439 tpd (March, calendar day)
  
  
• Average recovery of 88 percent
  
  
• Average grade milled of 0.885 g/t Au
  
  

About Osisko Mining Corporation

Osisko Mining Corporation operates the Canadian Malartic Gold Mine in Malartic, Quebec and is pursuing exploration on a number of properties, including the Hammond Reef Gold and Upper Beaver projects in Northern Ontario.

Mr. Luc Lessard, Eng., Senior Vice-President and Chief Operating Officer of Osisko, is the Qualified Person who has reviewed this news release and is responsible for the technical information reported herein, including verification of the data disclosed.