GOLD COIN MINES CO. Georgetown District. Deer Lodge County. Minerals Yearbook 1938. Page 349. Continued operations in 1937, about 3,700 tons of gold ore from the Gold Coin mine were treated by amalgamation. The Company also treated about 10,000 tons of old tailings by cyanidation.
WPA, "Gold Coin" (1938). Minerals Yearbook, All. 622.
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Gold Coin, Georgetown District, Deer Lodge County, gold, cyanidation