Arizona Mining Journal, 1919, Kay Copper Co. plans expenditure of $1,000,000: Arizona Mining Journal, v. 3, no. 1, June, p. 64. Authors Arizona Mining Journal Publication Date 1919 Citation Arizona Mining Journal, v. 3, no. 1, June, p. 64. State AZ Province TR County YA Placenames Black Canyon Rock Springs area Keywords Mineral District Copper Massive Sulfide Proterozoic More Keywords Mineral District, Copper, Massive Sulfide, Proterozoic, AzGeoBib RefNum 443