SMUGGLER MOUNTAIN. 187 
shoot. The majority of the other ores carry considerable barite and 
varying amounts of lead and silver. There is a great deal of low-grade 
ore consisting of altered dolomite carrying lead. In the upper levels this 
ore is oxidized and can not be profitably mined, but in the lower ones, 
where it occurs as a sulphide, it can be concentrated by mechanical proc- 
esses and profitably handled when averaging only 8 ounces of silver to 
the ton. 
Occurrence of ore—'The main occurrence of ore in the Smuggler mine is in 
connection with the Smuggler fault. Along this fault the ore has formed 
chiefly at two places, one at the south and one at the north end of the 
mine. The occurrence of the rich polybasite ore on the Smugeler fault 
on the seventh and eighth levels south has already been mentioned. At 
the northern end of the mine, at the Clark tunnel level, there are immense 
stopes out of which a large body of high-grade ore has been taken. These 
stopes are along the Silver fault at its intersection with the Smugeler fault 
above, and are continuous down from this level to the plane of the Della 
fault. The method of occurrence of the ore at this place is shown in PI. 
XLII, A, while that of the rich polybasite ore at the southern end of the 
mine is seen in Pl. XLI, D, which rens through the Smuggler shaft. The 
Smuggler fault between these two points carries considerable ore at 
intervals, and at one point is marked by large bodies of oxidized zine ore. 
This zine ore, which is found in the third and fourth levels north, is identical 
with that found in the open cut near the shaft and on the 40-foot level at 
the shaft, and it is probable, as already stated, that these two bodies were 
originally one, and that they have been separated by the Clark fault. 
SUMMARY OF MOLLIE GIBSON AND SMUGGLER GEOLOGY. 
These two mines are distinguished from the rest of the camp in the 
possession of peculiar ore shoots, which are characterized by flesh-colored 
barite, by poverty in lead, and by a large amount of polybasite and native 
silver. Both of these ore shoots lie along east-west faults of the Della 
system, and have evidently formed along fracture zones which were 
developed subsequent to the Della faulting, but previous to the ore deposi- 
tion. The existence of these fracture zones is shown by the nature of the 
ore, which is mostly barite containing angular fragments of the country 
rock, and thus has the character of a true vein filling. The lower-grade 
