The Kinross Gold Corporation is taking a fourth-quarter charge of $216.1 million, mainly to write down the value of two gold mines in line with lower bullion prices and to reflect costs of its acquisition of Amax Gold Inc. The company, North America’s fifth-largest gold producer, is writing down the carrying values of the Refugio mine in northern Chile by $46.9 million and of the Fort Knox mine in Alaska by $40.5 million. Toronto-based Kinross is also taking charges of $104.6 million for excess costs incurred while incorporating Amax’s mines and $9 million for closing the DeLamar mine in southwestern Idaho.