INDEX 
501 
Dante mine, ore in. 
rocks in. 
veins in. 
figure showing. 
workings of. 
Dante vein, character of. 
Dead Pine mine, description of 
dikes in. 
Page 
. 211,371-372 
. 33 
. 158,100,371-372 
.210,371 
. 370-371 
. 362 
.. 484-487 
35,473,477,480,485-486 
geology of. 
location of. 
ore of. 
plan showing. 
rocks in. 
veins in. 
workings of. 
Dead Pine vein, location and character of 
Dead vein, location and description of... 
Deadwood mine, description of. 
geology of. 
minerals in. 
ore of. 
production of. 
rocks in. 
veins of. 
Deadwood No. 2 mine, description of_ 
dikes in.. 
geology of.. 
ores of. e .. 
production of.. 
veins of.. 
Deerhorn mine, description of. 
gypsum in. 
.minerals in. 
ores of.. 
oxidation in. 
workings of.. 
De la Vergne, E. M., development by_ 
Delmonico mine, description of. 
Deposition, depth of.. 
mode of. 
time of.. 
Dexter Gold Mining Company, mine of. 
Dexter mine, description of. 
location of. 
ore bodies in. 
veins in. 
workings of. 
Diabase, description of. 
occurrence of... 
. 485-486 
. 5,150,484 
... 207,213,486-487 
. 212 
.27,33 
159,165,485,486-487 
. 484-485 
. 485,486 
. 26,166,333 
. 404-405 
. 404 
. 129 ! 
.212,405 
. 404 
. 33,404 
. 405 
. 406-408 ! 
... 393,406-407,408 j 
. 406 
. 407 
. 406 
. 406-408 
.. 284-285 
. 284-285 
. 121,125,201 
.. 284 
. 197 
. 284 
. 4,131 
.. 408 
.. 226 
. 228-231 I 
.. 226-227 
. 373 
. 373-374 
. 373 
373-374 
. 373 
56 i 
. 24,56 
petrology of. 56- 
Diallage, occurrence of. 54,55,56,114 
Diamond mine, workings of. 433 
Diamond vein, location and description of. 157, 
159,162,165,435,439, 440,445-446,452-453,462,470 
Dikes, basic, alteration of. 184,192-193 
area of.35-36,159,167 
character of.... 35-36,159 
convergence of. 155 
description of. 90-91,97 
fissures along. 165 
occurrence of. 35-36,167, passim 271-495 
types of. 91' 
descriptions of. 91-96 
view of. 396 
Dikes, diabase. See Diabase. 
Dikes, granite, occurrence of. 277 
See also Granite. 
■Page. 
Dikes, latite-phonolite, occurrence of. 271,273,373,384-385,412 
See also Latite-phonolite. 
Dikes, phonolite, alteration of. 184 
character of. 164 
Assuring in. 164 
importance of. 35 
mineralization of. 446 
occurrence of. 35,38, passim 271-496 
See also Phonolite. 
Dikes, trachydolerite, occurrence of. 323-324,387 
See also Trachydolerite. 
Dillon mine, description of. 476-477 
dikes in. 473,476,477 
geology of. 477 
location of. 150,476 
minerals in. 121 
ore of. 213,477 
veins in.:. 158,477 
workings of. 477 
Doctor claim, location of. 314 
workings on. 315 
Doctor-Jackpot Company, mines of. 314 
Doctor-Jackpot group, location of. 314 
view of. 292 
Doctor-Jackpot mine, coal in.31,317 
coal in, analysis of. 31 
description of.317-321 
gas in. 261 
geology of. 317 
history of.314-315 
location of,. 5,148 
minerals in. 115,121,122,175 
ore of. 171,318-321 
oxidation in.,... 198 
production of. 148,314 
veins in. 157,161,162,163^ 164,179,316-318,319-321 
workings of. 315,317 
plan showing. 316 
Doctor-Jackpot- veins, location and description of. 317, 
318-320 
Doctor vein, character of.318,319-320 
oxidation of. 198 
Dolly Varden mine, dikes in.36,91 
minerals in. 122,175,183 
Dolomite, occurrence of. 4,6,98,114,124,169-176,181-195, 
281,318-320,328-329,340-343,376-379,410,428,443,484 
Dorcas mill, cyanide process at, description of. 140 
Dorothy vein, character of. 154,158,199,489,490,491 
Doveton, G. D., on ore composition. 173 
Doyle, James, location of mine by. 430 
Drainage, character of. 40 
Drainage, mine, methods of. 9-10,133,235-238,239-251 
methods of, figures showing. 236,242 
See also Tunnels; Water, underground; Water 
level. 
Drainage tunnels. See Tunnels, drainage; Drainage, 
mine. 
Drury vein, character of. 456,463 
E. 
Eakins, L. G., analysis by. 66 
East Bobtail vein, character of.... 456,460 
East Drury vein, character of. 456 
East Emerson vein, character of. 456 
East Independence vein, character of. 456 
East London vein, character of. 456 
I 
