Nov 9 (Reuters) - Osisko Gold Royalties Ltd OR.TO :
* Acquires gold stream on Aquila's Back Forty project in Michigan, U.S.
* OBL to make staged upfront cash deposit of up to $55 million for gold stream, to make ongoing payments of 30 percent of spot price of gold
* Unit Osisko Bermuda Limited (OBL) to acquire gold stream with reference to future gold produced from Back Forty property
* OBL to also purchase units in amount of $10 million as part of a concurrent private placement with Aquila