Genetic Model for the Leadville District: Constraints from Field Data Wall-Rock Alteration, Ore-Gangue Mineralogy, Metal-Mineral Zoning, Fluid Inclusions, Stable Isotopes and Fission-track Geochronology
Tommy B. Thompson, 1988. "Genetic Model for the Leadville District: Constraints from Field Data Wall-Rock Alteration, Ore-Gangue Mineralogy, Metal-Mineral Zoning, Fluid Inclusions, Stable Isotopes and Fission-track Geochronology", Geology and Mineralization of the Gilman-Leadville Area, Colorado, T. B. Thompson, David W. Beaty
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The world-class leadville district was discovered in 1859 and is still producing ore from the Black Cloud mine, a relatively new operation begun in 1971 (see Smith, 1988: this volume, for history of the mine) and from the Diamond mine. District cumulative production through 1987 is approximately 26.2 million short tons (23.8 million metric tons) of ore from veins and dolomite-hosted massive sulfide replacement deposits. Placer gold and oxidized replacement orehodles provided much, of the early district production (Emmons et al., 1927), but the unoxidized orebcdies found further down-dip provide the unambiguous exposures for understanding the district ore deposits. Leadville is of historical significance, also, as the U.S. Geological Survey in one of its first actions assigned S.F. Emmons the responsibility of detailed investigations of the district, culminating in U.S. Geological Survey Monograph 12 (1886). Several additional publications updated his continuing studies in the district (Emmons and Irving, 1907: Emmons et al., 1927).