34

a wedge with apex to the east; it has a total length of approximately 9,000
feet and a greatest width of 3,000 feet. By the partial development of
cirques the upper part of the north face of the mountain has been given a
serrated plan, and on the steep walls of the basins formed the different
veins are exposed and some can be traced across shoulders from one
basin to the next; the lower slopes are covered with talus, this is well
shown in Plate IXB.

In the most westerly basin there are several claims on which some
development has been done, but they are lying idle at present. The veins
here are in the sedimentary tuffs and are found at least 1,500 feet west of
the contact with the granodiorite. They strike north 5 degrees east and
dips range from 25 degrees to 65 degrees southeast. They are true fissure
veins 1 to 2 feet wide, usually well mineralized and containing bunches
and bands of high grade ore, but mostly of ore classed as second grade;
the sulphides are zine blende, jamesonite, galena, and tetrahedrite mostly
and carry good values in silver. With good milling facilities these pro-
perties should be worked at a profit.

SILVER CUP PROPERTY. This property has had the most work done
on it and will serve as an illustration.

There are four main drift tunnels giving a vertical range of over
1,000 feet, although it is not certain that the lowest occurrence is on the
same vein as the upper ones. The upper tunnel at about 5,000 feet altitude
(See Map No. 171) is 200 feet long on a vein 6 inches to 2 feet in width,
averaging 10 inches, and in ore all the way.

A sample across a 6-inch paystreak gave!: gold, 0-02 ounce; silver,
45-4 ounces; lead, 33 per cent; zinc, 22 per cent.

The second tunnel, about 150 feet lower, is 100 feet long and shows
20 to 24 inches of mineralized vein throughout its length. At 40 feet a
stope was made for a height of 25 feet, all in ore. A sample assayed!:
gold, trace; silver, 116 ounces; lead, 41-6 per cent; zinc, 12-4 per cent.
Selected solid sulphide assayed!: silver, 150-250 ounces; lead, 50-70
per cent.

The lowest tunnel, the Duchess, was driven 140 feet, but after 100 feet
the vein fingered out; the strike here is at about 45 degrees to that in the
upper tunnels and it is probably one of another system of veins.

The vein is 6 to 18 inches in width, with disseminated sulphides,
mostly arsenopyrite, for 6 inches in the sedimentary tuffs on either side.
The gangue is quartz and a sample across 18 inches gave:! gold, 0-06 ounce;
silver, 92-2 ounces; lead, 14-9 per cent; zinc, 11-16 per cent.

SUNRISE PROPERTY. In the next basin, one-half mile to the northeast
of Silver Cup, the principal showings are on the Sunrise property where
there are two large mineral zones in granodiorite. The lower is at 4,950
feet elevation; it strikes north 10 degrees east and dips 45 degrees south-
east. The zone is 20 feet in width and contains a clean vein 1 foot in width
at the bottom and a narrower one at the top; the whole zone is well mineral-
ized, chiefly with galena and jamesonite. It has been opened for 200 feet.
The upper zone is at 5,050 feet elevation; it is 6 to 8 feet in width and is
highly mineralized throughout, chiefly with galena and jamesonite. It
has been opened by cuts for 100 feet and strikes north 60 degrees east with
a dip of 40 degrees southeast. Near the middle of the zone there are 6

1Assays by British Columbia Bureau of Mines.