... while the body of the dike may be impregnated with pyrite. Such ore differs from that of the usual sheeted zones in breccia or phonolite in that the tellurides are not so clearly confined to the actual fissures, but appear to some extent to permeate... Bulletin of the United States Geological Survey - Seite 25von Geological Survey (U.S.) - 1904Vollansicht - Über dieses Buch
| 1905 - 830 Seiten
...impregnated with pyrite. Such ore differs from that of the usual sheeted zones in breccia or phonolite in that the tellurides are not so clearly confined to the actual fissures, hut appear to some extent to permeate the rock with the pyrite. The richest portion of the ore, however,... | |
| Waldemar Lindgren, Frederick Leslie Ransome - 1904 - 456 Seiten
...ore differs from that of the usual sheeted zones in breccia or phonolite in that the tellurides arc not so clearly confined to the actual fissures, but...in basic dikes in the Portland (Anna Lee), Moose, Elktori, Conundrum, Pinto, and other mines has tended to exaggerate the importance of these dikes in... | |
| Samuel Franklin Emmons - 1905 - 648 Seiten
...impregnated with pyrite. Such ore differs from that of the usual sheeted zones in breccia or phonolite in that the tellurides are not so clearly confined...both walls, where the fissuring is best developed. DEPTH OF OXIDIZED ZONE. At a few points, as in the Abe Lincoln and El Paso mines, tellurides are found... | |
| Eugene Thomas Hancock - 1910 - 284 Seiten
...impregnated with pyrite. Such ore differs from that of the usual sheeted zones in breccia or phonolite in that the tellurides are not so clearly confined...both walls, where the fissuring is best developed. "Depth of Oxidized Zone. — At a few points, as in the Abe Lincoln and El Paso mines, tellurides are... | |
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