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Books Bücher 1 - 5 von 5 in ... Pyrite. — The iron sulphide, probably in the main pyrite, FeS2, is as usual...
" ... Pyrite. — The iron sulphide, probably in the main pyrite, FeS2, is as usual widely disseminated. It is, however, distinctly subordinate in quantity, and in this particular the district is in contrast with many of the mining districts of the West.... "
The Fluorspar Deposits of Southern Illinois - Seite 39
von Harry Foster Bain - 1905 - 75 Seiten
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Bulletin, Ausgaben 251-256

1905
...contrast with many of the mining districts of the West. Chalcopyrite. — The copper-iron sulphide, CuFeS2 (sulphur, 35 per cent; copper, 34.5 per cent; iron,...the ores. It is not of any economic importance here. titilmite. — The antimony sulphide, SbaS., (sulphur, 28.6 per cent: antimony, 71.4 per cent; specific...
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Report of Progress in the Geological Resurvey of the Cripple Creek District ...

Waldemar Lindgren, Frederick Leslie Ransome - 1904 - 36 Seiten
...subordinate in quantity, and in this particular the district is in contrast with many of the minino; districts of the West. Chalcopyrite. — The copper-iron...ores. It is not of any economic. importance here. Stilmite. — The antimony sulphide, Sb,S, (sulphur, 28.6 per cent: antimony, 71.4 per cent; specific...
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Bulletin - United States Geological Survey, Ausgabe 255

Geological Survey (U.S.) - 1905
...particular the district is in contrast with many of the mining districts of the West. Chalcopyrite_. — The copper-iron sulphide. CuFeS., (sulphur, 35 per...importance here. Stibnite. — The antimony sulphide, Sb.,8j (sulphur, 28.6 per 'cent: antimony, 71.4 per cent; specific gravity, 4.52 to 4.02), has been...
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Bulletin, Ausgabe 21

1914
...Northwestern mine near Millbrig. Chalcopyrite. — (Sulphide of copper and iron; CuFeS,; sulphur 35.0 per cent; copper 34.5 per cent; iron 30.5 per cent; specific gravity 4.1 to 4.3; scratched by steel; color brass-yellow). — Small quantities of this mineral have been reported from...
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Geological Survey Professional Paper, Ausgaben 168-169

Geological Survey (U.S.) - 1931
...mineral of comparatively early formation. Chalcoi>yrite (roppw pyrites) (CuFeS,). — Chalcopyrite (sulphur. 35 per cent : copper, 34.5 per cent ; iron, 30.5 per cent) is one of the abundant copper minerals of the district and is present in small amounts at least in...
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