316 



INDEX 



Mercury, extraction of, 129 



geographical distribution, 128 



geological horizon, 130 



native, 126, 127 



ores of, 126 



origin of ores, 126, 127 



production of, 293 



properties of, 126 



roasting process, 129 



sublimation of, 129 



uses of, 130 

 Mesabi Range, 204 

 Metamorphism, 42 

 Metasamosis, 35 

 Meteorites, content of, 25 



number of, 24 

 Meunier, S., 177, 190, 230 

 Michel, L., 138 

 Miller, W. G., 236, 240 

 Minckin, 244 

 Mine, definition of, 20 

 Mineralizers, 30, 33, 40 

 Mineral springs, 6 

 Mineville, New York, 198 

 Minium, 110 



Mississippi River belt, 115 

 Molybdenum, 268 



character of ore bodies, 268 



extraction of, 269 



geographical distribution, 269 



geological horizon, 269 



ores of, 268 



origin of ores, 268 



production of, 305 



properties of, 268 



uses of, 269 

 Molybdic ocher, 268 

 Morenosite, 241 

 Morozewicz, J., 219 

 Mother Lode, California, 75 

 Mottramite, 276 

 Murray, J., 247 



N 



Nagyagite, 52 

 Nantokite, 135 

 Naumannite, 283 

 Navarro, F., 190 



Newberry and Le Conte, 119 

 Niccolite, 164 

 Nickel, 238 



character of ore bodies, 241 



extraction of, 244 



geographical distribution, 242 



geological horizon, 243 



ores of, 238 



origin of ores, 238 



production of, 302 



properties of, 238 



uses of, 244 

 Nickeloid, 244 

 Nigrine, 273 

 Nivenite, 279 



Nordenskiold, A. E., 24, 190 

 Nordenskioldine, 177 

 Noumea, New Caledonia, 241 



O 



Octahedrite, 273 



Omichen, H., 137 



Orange mineral, 125 



Ore bodies, enrichment of, 3, 6 



Ore deposits, 1 



classification of, 18 



of Crosby, 18 



of Kemp, 18 



of Prosepny, 18 



of Weed, 18, 19, 20 

 meteoric origin, 24 

 Ores, primary source of, 1, 2 

 Orpiment, 164, 168 

 Osmiridium, 102 

 Osmium, 106 

 Ouray district, Colorado, 69 



Pacific Coast region, 75, 153 

 Palladium, 106 

 Paris green, 169 

 Pateraite, 269 



Pattinson process, lead and silver, 99 

 Peary, R. E., 190 

 Penokee-Gogebic district, 209 

 Penrose, R. A. F., 194, 250 

 Pentlandite, 238 



