AMERICAN BONANZA PROVIDES COPPERSTONE GOLD MINE .
September 6, 2013 American Bonanza Gold Corp. (TSX: BZA, OTCQX: ABGFF) ("Bonanza" or "Company") is pleased to announce progress at the owned Copperstone gold mine in Arizona during July 2013. The mine made good progress in accessing new ore zones during July, and seven areas of the mine were