Filters: Tags: Gold King Mine (X) > Categories: Image (X)

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Subgraphic pattern of calaverite, sylvanite and hessite, Gold King mine. La Plata County, Colorado. 1936. Photomicrograph of polished sections of ore: subgraphic pattern of calaverite and sylvanite in hessite, Calaverite, sylvanite and hessite. These textures may indicate replacement of hessite by gold tellurides, but owing to its rarity, such replacement is not believed to be important in La Plata ores. Reflected light 250 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-C, in U.S.Geological Survey Professional paper 219. 1949. Categories: Image; Tags: Gold King mine, La Plata County, Colorado, Mills, Mines, Quarries, Photomicrographs, photo print Polished sections of ore: Gangue is quartz, Gold King mine. La Plata County, Colorado. 1936. Photomicrograph of polished sections of ore: Intergrowth of krennerite and native tellurium; specimen etched with concentrated HNO3; cleavage pattern produced by etching is characteristic of krennerite. Gangue is quartz; reflected light 180 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 11-A, in U.S.Geological Survey Professional paper 219. 1949. Categories: Image; Tags: Gold King mine, La Plata County, Colorado, Mills, Mines, Quarries, Photomicrographs, photo print Galena replaced b sphalerite along cleavage traces, galena; sphalerite, Gold King mine. La Plata County, Colorado. 1936. Photomicrograph of polished sections of ore: Galena replaced b sphalerite along cleavage traces, galena; sphalerite; reflected light 75 x. Gold King mine., Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-A, in U.S.Geological Survey Professional paper 219. 1949. Categories: Image; Tags: Gold King mine, La Plata County, Colorado, Mills, Mines, Quarries, Photomicrographs, photo print Polished sections of ore: Gold King mine. La Plata County, Colorado. 1936. Photomicrograph of polished sections of ore: subgraphic pattern of calaverite and sylvanite in hessite, Calaverite, sylvanite and hessite. These textures may indicate replacement of hessite by gold tellurides, but owing to its rarity, such replacement is not believed to be important in La Plata ores. Reflected light 250 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-D, in U.S.Geological Survey Professional paper 219. 1949. Categories: Image; Tags: Gold King mine, La Plata County, Colorado, Mills, Mines, Quarries, Photomicrographs, photo print Polished sections of ore; Gold King mine. La Plata County, Colorado. 1936. Photomicrograph of polished sections of ore: galena replaced by super gene cerussite. Replacement by super gene cerussite, along boundaries between grains of galena and quartz and along traces of galena, reflected light 60x; Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-B, in U.S.Geological Survey Professional paper 219. 1949. Categories: Image; Tags: Gold King mine, La Plata County, Colorado, Mills, Mines, Quarries, photo print