BRIEF-Osisko updates Canadian Malartic mine plan

March 20 (Reuters) - Osisko Mining Corp OSK.TO :

* Updates Canadian Malartic Mine plan

* Says mill throughput is expected to stabilize at approximately 55,000 tonnes

per day in 2014

* 2014 cash costs per ounce estimated between C$580 and C$635, a 24% to 16%

reduction in costs from 2013 for malartic mine

* 2014 anticipated gold production for current year will increase between

525,000 to 575,000 ounces, up 11% to 21% for malartic mine

* Sees average gold production of 610,000 ounces per year over the next five

years

* Sees average of 597,000 ounces per year gold production over life of mine at

malartic mine

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