356 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
the C. K. & N. lode, which strikes N. 76° E. They end on the northeast against the 
El Paso and on the southwest against the Old Gold properties, giving a total stoping 
length along the lode of about 400 feet. The Old Gold shaft, sunk on the C. K. & N. 
lode 400 feet southwest of the C. K. & N.' shaft, is also about 400 feet in depth. 
The main level is 250 feet below the surface, and consists of a drift about 125 feet 
in length along the C. K. & N. lode, with a northeast-southwest drift on the Old 
Geld lode. The bottom level, 80 feet lower, consists of a similar drift on the C. K. & 
N. to the Old Gold lode. The collar of the Old Gold shaft is 98 feet lower than 
that of the C. K. & N. shaft. 
GEOLOGICAL FEATURES. 
« 
The C. K. & N. and Old Gold workings are in the same granite as the El Paso 
mine. This granite is cut by a number of small, irregular sills and dikes of phonolite. 
In the Old Gold ground there is a prominent phonolite sill or dike 30 or 40 feet in 
thickness, which dips to the northwest at about 45°. Thickness and dip, how¬ 
ever, are both variable, and in some places the sill is divided into an upper and lower 
sheet by a slab of schist. Similar schist overlies the phonolite, which apparently 
was intruded along a schistose streak or inclusion in the granite. 
LODE SYSTEMS. 
The principal lode is the C. K. & N., which strikes N. 76° E., and is approxi¬ 
mately vertical. It extends from the El Paso ground across the Raaler claim, and 
into the Old Gold ground until it meets the phonolite sill. Northwest of this sill 
no trace of the C. Iv. & N. lode has yet been found, and it probably does not cross it. 
The Old Gold lode is a nearly vertical fissure zone in the sill, striking, like the latter, 
N. 35° E. It is known only on the 300-foot level of the Old Gold, as it is not dis¬ 
coverable as a distinct lode in the schist and granite above and below the phonolite. 
There are a few small cross fissures in the C. K. & N. mine, striking about N. 30° E., 
and thus, like the Old Gold lode, corresponding to the general system of north¬ 
easterly lodes represented by the Tillery and El Paso veins. They do not perceptibly 
displace the C. Iv. & N. lode. 
CHARACTER OF ORE. 
The ore of the C. Iv. & N. lode consists of calaverite in a gangue of quartz 
associated with varying amounts of fluorite, and, as shown by concentrating at the 
Dorcas mill, with some barite. The calaverite sometimes projects as implanted 
crystals into small quartzose vugs, but probably the greater part of it is completely 
inclosed by the gangue. Occasionally nests of stibnite have been found in the lode, 
carrying up to 300 or 400 ounces of gold per ton. Chemical examination of such 
stibnite by Doctor Hillebrand shows that the gold exists as a telluride, probably 
mechanically included in the stibnite. None of the ore seen showed any sign of 
oxidation, and free gold is unknown. Some of the ore is remarkably rich, small 
quantities carrying as much as 3,000 ounces of gold per ton, while one lot of 1,586 
pounds netted 819,000, corresponding to about 1,200 ounces per ton. The average 
proportion of silver in the ore is 1 ounce to 8 or 10 ounces of gold. Some of the ore 
contains as much as 300 ounces of silver per ton. The ore of the Old Gold lode, 
