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Sulphide enrichment. A central band of cupriferous pyrite (P) containg a trace of tellurium and low values in copper, gold, and silver, is inclosed by bands of chalcocite (C) and tenorite, forming the outer portion of the vein containing considerable tellurium, and high values in copper, gold, and silver. Specimen is from Commercial mine. Natural size. Speciment 220. Salt Lake county, Utah, 1900, in false color as plate 38c in U.S. Geological Survey. Professional paper 38. 1905.
Categories: Image;
Tags: Boutwell, J.M. Collection,
Commercial Mine,
Mills, Mines, Quarries,
Photographers,
Salt Lake County, Utah,
Photomicrographs of chalcopyrite associated with contact metamorphic minerals. Specularite replacing calcite, from wall of east-west fissure, west end no. 6 level, Highland Boy mine. The black areas are foils of specularite, which replace calcite. The hand specimen from which this thin section was made shows chalcopyrite intergrown with specularite and replacing marble. Salt Lake County, Utah. 1900, plate 37-B in U.S. Geological Survey. Professional paper 38. 1905.
Categories: Image;
Tags: Boutwell, J.M. Collection,
Highland Boy mine,
Mills, Mines, Quarries,
Photographers,
Salt Lake County, Utah,
Photomicrographs showing replacement of metamorphosed limestone by chalcopyrite and pyrite. Salt Lake County, Utah. 1900.
Categories: Image;
Tags: Boutwell, J.M. Collection,
Limestone,
Mills, Mines, Quarries,
Photographers,
Salt Lake County, Utah,
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