492 GEOLOGY AND GOLD DEPOSITS' OF THE CRIPPLE CREEK DISTRICT. 
reached its maximum length of about 850 feet on levels 5 and 6, where it extended 
nearly 250 feet south of the shaft. Below level 9 only small isolated bodies of ore 
have yet been found in the Coin lode, though a new ore body has recently been opened 
near the north end of level 10 in a fissure zone lying parallel with and about 30 feet to 
the east of what had hitherto been considered the Coin lode. Whether this is really 
the Coin or a new lode not known on the levels above could not be ascertained in the 
stage of development reached at the time of visit. The general dip of the Coin lode, 
however, as shown in the levels above the tenth, should bring the lode rather nearer 
to the new ore body than to the old north drift on what was formerly considered the 
Coin lode on level 10. The lode is a mineralized sheeted zone in granite, the average 
width of the zone of distinct sheeting being probably about 4 feet. The zone usually 
consists of two narrow, fairly regular fissures about 4 feet apart, between which are 
other nearly parallel fissures, usually less regular and persistent, and numerous 
minor linking fractures. The stopes are often considerably wider than this, however, 
as the ore is not always limited by the dominant fissures of the zone. Thus on level 
4 the average width of the main stope is probably 10 or 12 feet. The widest stope 
in the mine is near the north end of level 4, where, at the junction of a small branch 
fissure zone with the Coin lode, the ore was 25 feet wide. An unusually wide body 
of ore is commonly found also where the Coin and Spur lodes join. On level 8 the 
Coin pay shoot varies in width from 4 to 10 feet, the average being about 5 feet. 
The Coin lode continues both to the north and south, beyond the points where 
pay ore stops, as a more or less distinct sheeted zone which often shows no visible 
difference from the productive portions. In some cases, however, such barren 
continuations of the lode are irregular and indistinct. 
There was little opportunity in 1903 of examining typical occurrences of ore in 
the Coin lode. The valuable minerals, however, seem to be practically confined to 
the actual fissures, usually less than an inch in width, which make up the fissure 
zone. 
The Spur lode is a mineralized sheeted zone in granite and is of the usual type. 
It has been stoped from level 4 to level 9, the ore body extending from the junction 
with the Coin lode a varying distance to the southeast. Its maximum length 
(about 225 feet) is attained on level 8. On levels 8 and 9 the northeast end of the 
ore bod} r is very close to the Cashen fault. The strike and dip of this fault are such 
as to cause its line of intersection with the Coin lode to pitch northward at a lower 
angle than the line of junction of the Coin and Spur lodes. As a result of this the 
Spur lode, if it is ever identified on level 10, will probably lie within the hitherto 
unproductive ground in the foot wall of the Cashen fault. 
The general structure of the Spur fissure zone is similar to that of the Coin. 
Near level 6, where the Spur lode passes through the phonolite sill already described, 
the ore body contracts in width anti decreases in value. There is no noticeable 
faulting of the phonolite by the lode fissures. 
The No. 3 lode is of the same general type as the Spur, but is narrower, the 
stopes being usually from 3 to 4 feet wide. The fissure zone constituting the lode 
follows in part a small phonolite dike, the presence of which seems to have no appre¬ 
ciable influence on the character of the ore, which occurs mainly in the fractured 
