166 GEOLOGY AND GOLD DEPOSITS OF THE CKIPPLE CREEK DISTRICT. 
usually contains one or more seams of gouge carrying a little pyrite, but no ore. It 
slightly offsets the City View dike and perhaps also the Chance and Matoa lodes. 
(See fig. 25, p. 293.) The displacement is probably less than 6 feet. In the southern 
part of the Mary McKinney mine, the Mary McKinney fissure zone faults a generally 
barren cross fissure known as the Jackpot vein, though it is not the productive lode 
known in the Doctor-Jackpot mine. The throw in this case corresponds to a reversed 
or thrust fault and can scarcely exceed 15 feet. In the Elkton mine the Elkton or 
Walter lode is slightly displaced near the breccia-granite contact by the barren fissure 
known as the Dead vein, or better as the Thompson fault. In some places this is a 
simple fissure containing a foot or more of soft slickensided gouge. Elsewhere it 
consists of two or more narrower fissures filled with similar material. The net 
displacement, though not susceptible of measurement, is probably not over 100 
feet and may be very much less. 
Some slight faulting was noticed in the Jerry Johnson and W. P. TI. mines, a 
flat vein in one place having displaced the W. P. H. vein for a few feet. The 
Shurtloff vein faults a prominent cross vein on level 11 of the Findley mine, the east 
part being thrown 6 feet northward. In the Isabella mine, on level 11, the north¬ 
west-southeast Pinto basic dike is faulted by the nearly east-west Empire No. 2 
vein, the southeast part of the dike being thrown 10 feet to the east. In the same 
mine the Buena Vista vein, striking northwest, is apparently faulted by the Klon¬ 
dike vein, the southeast part of the Buena Vista being offset from 20 to 50 feet to 
the southwest. It is possible in this case, however, that both fissures were formed 
at the same time and that the Buena Vista vein is merely deflected from one sheeted 
zone to another. The Pharmacist vein, striking 60° E. and dipping northwest 
at 60°, is faulted by the Zenobia vein striking from N. at 20° E. to north-south 
and dipping west at from 60° to 80°. The east part of the Pharmacist is offset from 
10 to 20 feet to the southeast. Both are productive lodes. Their intersection 
pitches north and is exposed to a depth of several hundred feet in the Zenobia 
incline. 
In the El Paso mine the nearly east-west C. K. & N. lode is intersected by 
fissures having general northeasterly strikes and roughly parallel with the El Paso 
and Tillery veins (fig. 39, p. 350). Some of these fissures do not visibly offset the 
C. K. & N. vein. In one case the ore of the C. Iv. & N. vein turns and follows one 
of these cross fissures for about 100 feet and then resumes its normal course. In 
another case the C. K. & N. vein is offset for about 100 feet, the intersecting fissure 
containing no ore. This may possibly be a fault, formed after the deposition of the 
ore in the C. K. & N. vein; but it is more probable that the offsets in the C. K. & N. 
fissure zone are due to the fact that it w r as formed in rocks already traversed by 
the northeasterly fissure zones of which the El Paso lode is the most prominent 
member. That is, it is in the main an original structure and is not due to faulting 
after the deposition of the ore or even after the formation of the C. Iv. & N. fissures. 
In the Gold Coin mine there is a prominent fissure zone known as the Cashen 
fault, which strikes N. 20° E. and dips nortKvest at 51°. It contains in places 
from 4 to 5 feet of crushed and altered country rock forming a soft clayey gouge, 
and has the appearance of a fault of considerable throw. Nevertheless the Coin 
lode and the Montana phonolite dike, both of which are intersected by the Cashen 
