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Filters: Tags: {"type":"collection","name":"highland boy mine"} (X) > partyWithName: Boutwell, John Mason (X)

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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.
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Complete replacement of limestone by copper ore. Massively bedded cupriferous pyrite, with quartz indicating original bedding, Highland Boy mine, new stope. Salt Lake County, Utah. 1900, plate 32-B in U.S. Geological Survey. Professional paper 38. 1905.
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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.
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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.
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Photomicrographs of chalcopyrite and pyrite associated with contact metamorphic minerals. Green garnet in calcite, from Highland Boy limestone, no. 7 level, Highland Boy mine, 60 feet from monzonite intrusive. Individual crystals and aggregates of crystals of green garnet marmorized to limestone. Salt Lake County, Utah. 1900, plate 36-A in U.S. Geological Survey. Professional paper 38. 1905.
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Normal barren contact between Highland Boy limestone and footwall quartzite, no. 7 level Highland Boy mine, looking west. Salt Lake County, Utah. 1900, plate 21-A in U.S. Geological Survey. Professional paper 38. 1905.
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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.
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Photomicrographs showing replacement of metamorphosed and a normal calcareous shale. Intergrowth of chalcopyrite and pyrite replacing quartz, from no. 4 level Highland Boy mine. The chalcopyrite and pyrite encircle and replace the quartz of an entirely silicified limestone. This section from a specimen from an upper level shows evidences of superficial alteration not apparent in the reproduction. The margins of the sulphides are tarnished, simulating peacock ore. Salt Lake County, Utah. 1900, plate 35-A in U.S. Geological Survey. Professional paper 38. 1905.