Report of the State Mineralogist . ts is described byEakle1, who emphasizes the immense scale on which the volcanic rocks 1 A. S. Eakle, , Mines and Mineral Resources of Alpine County, Mining Bureau, 1916. 27—8725 400 MINES AND MINERAL RESOURCES. of the region have been mineralized. The andesites have been alteredand silicified by ascending hot solutions carrying the minerals formingthe ores. The resulting mineral deposits are zones of rich, narrowstringers and impregnations of immense bodies of lower grade withoutdefinite walls. Silver ore was first found at Silver Mount
Report of the State Mineralogist . ts is described byEakle1, who emphasizes the immense scale on which the volcanic rocks 1 A. S. Eakle, , Mines and Mineral Resources of Alpine County, Mining Bureau, 1916. 27—8725 400 MINES AND MINERAL RESOURCES. of the region have been mineralized. The andesites have been alteredand silicified by ascending hot solutions carrying the minerals formingthe ores. The resulting mineral deposits are zones of rich, narrowstringers and impregnations of immense bodies of lower grade withoutdefinite walls. Silver ore was first found at Silver Mountain in 1861 and ore wasdiscovered at the Morning Star mine in 1863. Work began on theAdvance mine at Monitor in 1863, and at the Tarsus, later called theColorado No. 2, probably the same year. According to Peter Curtz, thefirst reduction plant in the county was a 10-stamp mill built in 1863at Markleeville by Paul Pioda for custom work. This mill crushed about1000 tons of ore from the I. X. L. mine in the Silver Mountain district. Photo No. 49. Monitor, Alpine County. All that is left of a camp that had over 2000inhabitants in the 60s and 70s. Photo by C. A. Logan. in 1864, and Mr. Curtz, who worked in the mill, states that this oreassayed $250 a ton of which about $125 a ton, or 50%, was charge for milling was $30 a ton. Gold ores were also worked inthis mill from the Boulder Hill and Washington mines. The difficulty of treating the ores successfully has been a great set-back to the mines in the county. Such was the history of Silver Moun-tain, the Exchequer and I. X. L., Globe, Advance and for a time theColorado No. 2. Transportation to the railroad in the old days was alsoslow and very expensive. There is ample water available in the forks of Carson River and intheir perennial tributaries for generating electric power. The absence ofgood timber in the region near the river is striking. It was stated in1868 that 5,000,000 feet of saw logs and 6000 cords of wood
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
