[3] Poyrphyry gold mineralization occurs in the early Miocene (dated to 22 to 24 million years ago) Maricunga volcanic-intrusive complex.

[3] In 1998 Kinross began operating the mine following a merger with Amax Gold (which changed its name to Kinam[4] ), which held a 50% stake in the property, with the remainder coming with the 2007 purchase of Bema Gold Corporation.

[1] In 2010 Kinross announced completion of a feasibility study for a $290 million expansion project to the Maricunga mine, which would increase production by 10 million tons, and 90,000 ounces per year.

[5] In August 2016, Kinross ceased operations at the Maricunga gold mine, resulting in a layoff of 300 employees.

The decision to close the mine was the result of the Chilean government "shut[ing] down the water system linked to the operation over environmental concerns.