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SILVER MINING
Silver mining in the United States part3
Article # : silver177
Idaho
The Coeur d’Alene district of Shoshone County in northern Idaho has produced more silver than any other mining district in the United States, and is historically one of the top three silver districts in the world in total silver produced. (It competes with Potosi in Bolivia and Pachuca-Real del Monte in Mexico for the title of greatest silver district, each having produced more than a billion troy ounces of silver). Through 2006, the Coeur d’Alene district has produced a total of more than 37,000 metric tons (1.2 billion ounces) of silver.
Three silver mines are currently operating in the Coeur d’Alene district: the Galena mine, owned by US Silver; the Sunshine mine, owned by Sterling Mining Co.; and the Lucky Friday mine. The Lucky Friday mine produced 89 metric tons (2.9 million ounces) of silver in 2006; the Galena mine produced 40 metric tons (1.3 million ounces) of silver in 2006.
Missouri
Silver mining began in 1879 at the Einstein mine, nine miles northwest of Fredericktown in Madison County. The settlement of Silver Mine, complete with US Post Office was established to serve the miners of the Einstein, Ozark, and Apex mines. The mines closed within a few years, but reopened briefly in 1916 and again in 1927 to mine tungsten.
Montana
Butte, Montana is historically the second-greatest source of silver in the United States, second only to the Coeur d’Alene district in Idaho. Butte started as a placer gold camp in 1864, and the placers were exhausted by 1867. But in 1874 prospectors discovered silver veins. Butte flourished as a silver-mining district until miners tunneled into large copper veins in 1882. From then until the 1980s, Butte was primarily a copper-mining district, but with a lot of silver as a byproduct. Over the years, Butte has produced more than 22,000 metric tons of silver.
Silver was discovered at Phillipsburg in 1864, and the district was one of the most prolific silver producers in Montana. Major mines included the Granite Mountain mine, the Bi-Metallic mine, and the Hope mine. In 1887, the district produced 2.2 million troy ounces (68 metric tons) of silver, making it the largest silver producer in the US for that year. The district suffered greatly from the fall in the price of silver in 1893, and remained moribund until World War I, when the manganese deposits of the district became valuable, and Philipsburg became one of the top US producers of that metal. Silver occurs in veins filling fracture zones through Paleozoic limestone. Minerals in the silver-ore veins include polybasite, pyrargyrite, proustite, sphalerite, galena, and tennantite. Manganese occurs as replacement bodies of pyrolusite and rhodochrosite in limestone adjacent to the fracture zones. No mines are presently active in the district.
source: wikipedia