30

hundred feet north a deep, 20-foot cut driven on the vein shows a 24-inch
width of quartz at the face. The vein carries up to 3 per cent of sulphide,
chiefly chalcopyrite, but with a little bornite and pyrite. The chalcopyrite
occurs in irregular blebs throughout the quartz and also in short, parallel
seams, some of which are half an inch thick and extend for 3 or 4 feet.

Two channel samples were collected for assay. The first, taken across
9 inches, about 30 feet south of the 45-foot tunnel, assayed: gold, none;
silver, 0°10 ounce a ton; copper, 0-76 per cent. The second, taken across
16 inches, 20 feet from the talus slide at the north end of the vein, assayed:
gold, a trace; silver, 0:60 ounce a ton; copper, 0-18 per cent. An average
sample collected by W. M. Brewer, M.E., at the 45-foot adit in 1914,
assayed: gold, 0-08 ounce a ton; silver, 1-6 ounces a ton; copper, 1-9 per
cent. This average sample from the 20-foot open-cut assayed: gold, 0-04
ounce a ton; silver, 1:4 ounces a ton; copper, 4-1 per cent.

No intrusives were seen in the andesite in the immediate vicinity of the
vein, but small stocks of granodiorite are present in the neighbourhood,
judging by large blocks of granodiorite seen on the talus slide over which
the trail to the vein passes.

Singlehurst or Ptarmigan Group (21)
(See Figure 4)

References: Ann. Repts., Minister of Mines, B.C.: 1899, p. 655; 1900, p. 786; 1901, pp.
990 and 997; 1902, p. 46; 1914, p. 1381.

The Singlehurst or Ptarmigan property is about 5 miles east of Usk,
at an elevation of 4,700 feet, near the summit of Bornite mountain. The
claims are reached by a branch from the Kleanza Creek trail.

The Ptarmigan vein was one of the first in the area on which serious
work was done. Active development commenced in 1899 and by 1901 a
vertical shaft had been sunk to 130 feet, with crosscuts to the vein on the
60- and 100-foot levels. At a depth of 30 feet there was a 20-foot drift
north and a 25-foot drift south, at the 60-foot level a drift 16 feet south,
and on the 100-foot level 60 feet of drifting north and south. There is no
record of work done following the shipping of 5 tons of ore to a smelter
in the autumn of 1902.

The claims are underlain by thick, massive, andesitic flows. A small
area of bedded cherts, with an observed thickness of 20 feet, outcrops about
350 feet northeast of the shaft. The chert strikes northeast and dips 40
degrees northwest. The andesite flows probably have the same dip and
strike. About 30 feet east of the shaft the andesites are cut by a diorite
dyke, which strikes in a northerly direction. The dyke ranges from 5 to 10
feet in width and has occasional small, branching dykelets, which strike at
right angles to it. At a pit on the vein 225 feet south of the shaft a 14-inch
branch dyke of diorite is offset for 6 feet by the fault along which the vein
occurs. It is presumed that the main diorite dyke is also offset 6 feet where
it crosses the line of the vein and fault, beneath a drift cover 100 feet north
of the shaft.

At the shaft the vein consists of 8 inches of vein quartz with several
inches of altered wall-rock. The quartz is rusty in several places through