48

The writer examined five adits on the property, and these are shown
in their approximate positions in Figure 11. The mineralized zone dips
southwestward at a low angle, so the actual thickness is much less than
the width shown in Figure 11. The zone contains a great deal of quartz

Scale of Feet

100

s
3
S
2
vo
3
|
&

Approximate
mineralized zone

Figure 11. Underground workings on Ben Bolt group.

as stringers and large solid bodies and is everywhere very sparsely min-
eralized with pyrite, galena, and sphalerite. Drifts have been driven
along the zone, probably on the best vein matter, but as far as ordinary
examination could tell drifts elsewhere in the zone would have yielded
similar results. A pre-mineral dyke is exposed in the drifts of the four
lower adits. In these adits, too, the vein matter is present as several ill-
defined quartz veins 6 feet or so wide and as closely spaced quartz
stringers. In the uppermost adit the actual thickness of solid quartz
probably exceeds 30 feet. Mineralization is very sparse, but because the
quartz bodies are so large, sampling should be thorough enough to be con-
clusive before the showings are abandoned as too low grade for mining.

Properties on the Portland Canal Fissure Zone

The Portland Canal fissure zone was named by McConnell after the
Portland Canal mine located on the zone.!_ The fissure zone is in the upper
part of the Bitter Creek formation and is characterized by shearing, and
faulting, and by the presence of several, parallel, mineral-bearing veins.
The width of the zone is variable and is as great as 1,500 feet in some

'™icConnell, R. G.: Geol. Surv., Canada, Mem. 32, p. 24 (1913).