262 
INDEX. 
Page. 
Mastodon mine, description of 181 
Maud S. claim, replacement of limestone 
by ore at - --- 142 
Mau 1 S. vein, description of 244-245 
McNeill, B., acknowledgments to 14,226 
McNutt. R.J. , reference to - 191 
Meldrum and Hammond tunnels, descrip- 
tion of.. 250 
Melville lode, description of ...■ 158 
Metamorphism of country rock in connec- 
tion with ore deposition 114-131 
Meteoric water, action of , in ore deposi- 
tion -- 133-134 
Michael Breen mine, description of — 196-197 
Micky Breen mine. See Michael Breen 
mine. 
Midnight mine, description of 239 
Mineral King mine, description of 240 
Mineral Point, banded vein at, cross sec- 
tion of. --- 89 
lodes of --.- -- 185-189 
operations near 22 
Mineral waters associated with ore de- 
posits 113-114 
Minerals, gangue, of the ores 70-87 
Minerals, ore, of the lodes. 77-87 
Mineralogy of- ores.. 70-87 
Mining, methods of 39-41 
Moles mine, direction and position of — 254 
faulting and Assuring at 55 
Molybdenite, occurrence and character 
of. 83 
Mono lode, description of 244 
Monzonitic porphyry, analyses of 127 
mineral composition of 129 
Monzonite-porphyry, mineral composi- 
tion of 128 
Morning vein, Jesc. iption of 212 
Mountain Queen mine, description of.. 183-184 
shipmen ts of ore from 21 
Mountaineer mine, description of 166 
National Belle mine, alunite from, analy- 
sis of 235 
description of 231-236 
kaolinite from, analysis of 234 
kaolinite in 73 
monzonitic porphyry from near, anal- 
ysis of.. 127 
minei'al composition of 129 
sections through 232 
underground workings of, plan of . . . 224 
New York City lode, cross section of 67 
ore in, effect of depth on 98 
New York City vein, description of 153-154 
faulting along 57 
No-Name lode, cross section of 88 
description of 177 
North Star (King Solomon) group of 
lodes, description of. 163-165 
North Star (King Solomon) lode, ore 
from, plate showing structure 
of. 86 
North Star (King Solomon) mine, de- 
scription of 163-165 
sketch plan of workings of 164 
Page. 
North Star mine (Little Giant Moun- 
tain), ore in, distribution of . . 97 
ore in, effect of depth on 98-99 
North Star lode (Sultan Mountain), ores 
of 94 
North Star mine (Sultan Mountain), de- 
scription of 251-252 
lode ore in, value of 102 
Osceola claim, ore from, plate showing 
structure of 88 
Old Lout lode, ore in, effect of depth on . 99 
Old Lout and Forest mines, description 
of. 192-193 
Ore, changes in, due to depth 98-100 
spaces filled with, origin of 104-109 
Ores, distribution of, within lodes 96-101 
mineralogy of 70-87 
of the lodes. 70-103 
plates showing structure of 86,88 
treatment of, methods of 41-43 
See also Ores, lode; Ores, stock; Ores, 
lode and stock. 
Ores, lode, areal distribution of 94-96 
banded structure in. 88-91 
brecciated structure in 91 
cellular structure in 91 
massive structure in 87-88 
megoscopical features of 87-92 
microscopical features of 92-93 
origin of 102 
relation to country rock 101 
secondary alteration of 101-102 
spherulitic structure in 91-92 
structure of 87-93 
value of 102-103 
See also Ore deposits. 
Ores, lode and stock, origin of 132-141 
paragenesis of 131-132 
Ores, low grade, utilization of 23 
Ores, stock, change in, with depth 111-112 
character and structure of 109-111 
value of.... 112-113 
See also Ore deposits. 
Ore-bearing fissures. See Fissures, ore- 
bearing. 
Ore bodies, secondary enrichment of . . . 136-141 
Ore breaks, definition of 103 
Ore deposition, metamorphism of coun- 
try rock in connection with. 114-131 
Ore deposits, classification of 43 
mineral waters associated with 113-114 
See also Ores, lode; Ores, stock. 
Ore minerals of the lodes 77-87 
Ouray limestone, relations of 35 
Owen, J„ cited 219 
Paleozoic formations in Silverton quad- 
rangle.. 35-36 
Palmetto mine, description of 190 
ore in, effect of depth on 99 
Paragenesis of lode and stock ores 131-132 
Paymaster mine, description of 236 
Philadelphia mine, description of 170 
Phillips, J. A., cited 70 
Phillips, J. A. and Louis H.. cited 56,243 
Pile, reference to 19 
