SMUGGLER MOUNTAIN. 195 
Iowa fault— Just east of the bottom of the Iowa shaft a vertical fault is 
well exposed, which thrusts up the Silver fault on the east side from 40 to 
60 feet. This fault is probably a continuation of the Clark fault, which is 
shown in the Smuggler and the Mollie Gibson, or at least belongs to the 
same system. 
Other faults —At various places in the workings of this mine there is noticed 
a series of abrupt rolls in the Silver fault, which cause local flattenings, or 
benches, and these rolls may be developed in places into slight faults. 
The Della fault is exposed in the southern part of the upper workings, and 
the Parting Quartzite is seen running into the fault on the lower side. 
Occurrence of ore —The great Thompson stopes of the Park-Regent evidently 
lie near the intersection of the Della fault with the Silver fault above, and 
from the Della fault plane the ore was taken out up to the glacial drift. 
These stopes are now caved in so as to be inaccessible. 
The ore now being taken out in the lower workings also lies in a 
decided shoot, which is marked by a continuous stope, extending at the 
time of examination from the tenth to the seventeenth level, a distance of 
about 400 feet. ‘The long axis of this shoot is northwest and southeast, 
corresponding to the trend of the small faults belonging to the Regent sys- 
tem. Its width, taken in a northeast-southwest direction, appears to be 
about 150 or 200 feet, and the ore averages 5 or 6 feet in thickness. The 
general plane of this shoot is parallel to the Silver fault, but most of the ore 
lies in the dolomite, often with several feet of solid barren dolomite between 
it and the fault breccia. It is therefore formed along a slip parallel to the 
Silver fault. Throughout Smuggler Mountain these slips, which are often 
50 or 60 feet away from the main fault, are frequently highly mineralized. 
The slip which hes close to the Silver fault in the dolomite is generally most 
productive, and is often more highly mineralized than the fault plane itself. 
The two chief ore shoots of the Buskwhacker are continuous into the 
Park-Regent, converging toward the north, so that they probably meet near 
the Iowa incline. Where these shoots come together they are connected 
by no fewer than four distinct parallel northeast-southwest shoots, which 
carry a large amount of very rich ore. Along most of these shoots there 
are fractures or watercourses. The two slight faults which give rise to 
the main Bushwhacker ore shoots come together and end in a bench in the 
Park-Regent. 
