346 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
zone 20 to 30 feet wide, 20 to 25 feet high, and about 200 feet long, parallel to the 
north-south fissure system. The vertical shaft is near the eastern side of this zone. 
Within this area the rock is cut into a series of more or less regular blocks, but 
at the margins of the zone the fissures become narrower and less distinct till at last 
they can not be traced at all. Neither system appears to fault the other. The 
levels from the vertical shaft below the first or 130-foot are not extensive nor 
important. 
The workings from the incline shaft expose three definite groups of fissures 
corresponding to those which strike N. 55° E. and dip 50° NW. Each group con¬ 
sists of a series of approximately parallel fractures at small but varying distances 
apart, forming a vein from a few inches to 2 or 3 feet in width. The incline shaft 
is sunk on one of these. A second one occurs about 20 feet southeast of the shaft 
on level 1. It is about 12 feet from the other vein on level 2, showing that the 
two approach with depth, and on the third or bottom level the two are probably 
united to form one, for the second is not seen. The third vein is shown only 
on level 3, where it is 70 feet southeast of the vein on which the incline is sunk. 
It is drifted onto the southwest and connects by a 20-foot winze with the first or 
130-foot level of the vertical shaft. 
The vein on which the incline shaft is sunk carries no ore. The vein just to 
the southeast of it, however, is stoped from the surface down to the first or 38-foot 
level, 3 to 4 feet wide and 60 feet long. Although the vein is oxidized at the sur¬ 
face, tellurides soon appear with increasing depth, and from level 1 down oxidation 
is very slight. The values occur in the narrow seams which collectively make up 
the vein. The Assuring and consequent distribution of the values in this vein 
were sufficient to permit shipping of all the materials broken from the vein. 
The shoot narrows in going down, the stope being 20 feet wide just below 
level 1 and 10 feet at the second or 72-foot level, below which the values were too 
low to make mining profitable. There is no indication of the presence of cross 
seams in this ore shoot. 
On level 3 of the incline the third vein, 70 feet southeast of the shaft vein, 
carries an ore body which has been stoped 4 to 6 feet wide and 15 to 30 feet long 
25 feet above and 35 feet below the level. The ore is similar to that in the vein 
above. No cross seams of importance were observed. 
Level 1 of the vertical shaft explores the area affected by the two series of 
fissures already described. Here ore was encountered. It consisted mainly of 
tellurides contained in the main fissures and the many parallel small seams. The 
rock itself carried very little gold, and hence only the screenings were shipped, 
giving returns of 3 to 5 ounces. When one series of fissures got beyond the influ¬ 
ence of the other system, the values suddenly decreased and soon gave out altogether. 
The shaft is about in the center of a stope which is 60 feet long, 10 feet wide, and 
extends above the level for 30 feet and below for 20 feet. A similar stope, 30 by 
20 feet and 25 feet high, begins 50 feet south of the shaft. One hundered feet 
north of the shaft a chamber 20 by 20 by 20 feet has been made. The values did not 
warrant further stoping at these places, and development is in progress. 
