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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,
Early stage in replacement of limestone by copper ore, banded partially marmorized limestone cut by strike fissures, Highland Boy mine no. 6 level, looking west. In the walls of these fissures characteristic contact metamorphic minerals appear, and chalcopyrite and specularite replace metamorphic limestone. Salt Lake County, Utah. 1900, plate 31-A 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,
Later stage in replacement of limestone by copper ore, sulphide copper ore composed of chalcocite, chalcopyrite, and pyrite replacing marble along strike fissures, Highland Boy mine, no. Salt Lake County, Utah. 1900.
Categories: Image;
Tags: Boutwell, J.M. Collection,
Highland Boy mine,
Mills, Mines, Quarries,
Photographers,
Salt Lake County, Utah,
Photomicrograph of fresh and decomposed mineralized monzonite, typical monzonite of Bingham, from Tribune tunnel, Telegraph mine. Fine grained granular to subporphyritic structure. Augite (lower right), biotite (top center), and orthoclase form chief constituents. The enclosing areas are almost entirely feldspathic, including both orthoclase and plagioclase, a little garnet. Augite is uralitized. The small black areas are nearly all magnetite, but a few are grains of pyrite. Salt Lake County, Utah. 1900, with graphics added, plate 26-A, in U.S. Geological Survey. Professional paper 38. 1905.
Categories: Image;
Tags: Boutwell, J.M. Collection,
Mills, Mines, Quarries,
Photographers,
Salt Lake County, Utah,
Telegraph mine,
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,
Photomicrographs of chalcopyrite associated with contact metamorphic minerals. Chalcopyrite with zinc blende and garnet in calcite, from metamorphosed limestone 60 feet from monzonitic intrusive, no. 7 level, Highland Boy mine. The darkest areas are intergrowths of chalcopyrite and pyrite. They fringe the zinc blende and are intergrown with it and green garnet. The groundmass is calcite. Salt Lake County, Utah. 1900, plate 37-A 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,
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