VANCOUVER, BRITISH COLUMBIA--(Marketwire - Feb. 3, 2010) - American Bonanza Gold Corp. (TSX:BZA)(OTCBB:ABGFF)(FRANKFURT:AB2) ("Bonanza") is pleased to announce the positive results of its NI43-101 compliant 2010 Feasibility Study (the "Study") at Bonanza's 100% owned Copperstone Gold Mine in Arizona. The Study, prepared by Continental Metallurgical Services under the guidance of Todd Fayram, B.S ...