NORTH-WESTERN DISTRICT (No. 1). 35

At several other places at higher altitudes work has been done on showings of pyrite,
marcasite, and magnetite, in which not much promise is indicated. In general the minerali-
zation on these claims represents-a pyritic propitilization of the contact-rocks, accompanied by
intense silicification and epidotization. No zonal mineral-carrying structure could be observed.

KiTsuMGALLUM LAKE SEcTION.

The usual assessment was carried out on several properties in this area. The area was not
examined during the 1929 season. For a description of the best-known properties readers are
referred to the 1928 Annual Report.

LAKELSE SEcTION.*

This area was examined by F. P. Caddy, Temporary Assistant Resident Engineer, who
- submitted the following reports :—

This group consists of the Dummy, I'm Alone, Copper Queen, Summit, Surprise,

Copper Queen.* Bluebell, Lucky Seven, Hidden Trail, Iron Hill, and Iron Cap. It is owned
by J. Bell, T. Turner, and associates, of Terrace. The property is reached by

following the Terrace—Lakelse road to the 8-Mile post and then taking a good horse-trail up
Williams creek to Bell’s cabin, a distance of 7 miles. The trail then crosses the creek by a
good bridge and climbs the north slope of the range by a series of switchbacks until it reaches
a small plateau containing two lakes, estimated at from 1,500 to 2,000 feet below the crest of
the range. Up to the beginning of the plateau the trail is fair, but afterwards becomes very bad.

The main showing consists of a large, almost vertical dyke in an altered argillite country-
rock, striking south through the hill. It outcrops on the east side of a small gulch running down
the face of the mountain and can be traced up to the top of a ridge which parallels the main
range at a lower altitude, at which point it bends to the south-east. It has been exposed by
euts in several places.

The dyke, which is copper-stained almost everywhere, has been greatly altered and in places
consists of bands of epidotite, garnetite, and magnetite. Other minerals observed consist of
chalcopyrite, bornite, pyrite, and pyrrhotite in the lower part, while near the top of the ridge
there are good showings 6f fine-grained galena, zinc-blende, and patches of solid chalcopyrite.

Not enough work has been done to be able to say very much about values. Fair gold and
silver values are claimed and the width of the vein-matter over a vertical height of nearly 1,000
feet should average 8 to 12 feet. More work is required before a definite opinion regarding
values can be formed. The dyke is well mineralized in many places, mainly with copper
minerals, and merits systematic exploration.

A grab sample from the dump of a small open-cut at about 800 feet above the plateau
assayed: Gold, nil; silver, nil; copper, nil. A chip sample over 2 feet of mineralized matter
in the centre of a cut 12 feet wide at about 970 feet above the plateau assayed: Gold, trace;
Silver, 0.2 oz. to the ton; copper, 0.8 per cent. A chip sample over 18 inches of galena and zine-
blende in the middle of a cut 16 feet wide at about 1.3870 feet above the plateau assayed: Gold,
trace; silver, 6.5 oz. to the ton; copper, 1 per cent.; lead, 7 per cent.; zinc, 11 per cent. A chip
sample taken over 12 inches of chalcopyrite 6 feet east of this assayed: Gold, trace; silver, 5 oz.
to the ton; copper, 12.7 per cent.

In places the east wall of the dyke consists of limestone and there are occasional inclusions
of limestone in the epidotite. On the top of the main range there is an outcrop of solid magnetite
8 feet wide, striking north-south and dipping 45° east. On the foot-wall there is a seam about
16 inches wide mineralized with pyrite. A sample across this assayed: Gold, trace; silver,
trace. ;

This claim is situated on the top of Thornhill mountain and is owned by A. L.
La Libertad.* Fitzpatrick, of Terrace. It is reached from a point between the 7- and 8-Mile
posts on the Terrace—Lakelse road, where a fairly good trail switchbacks up

to the top of the mountain. The last 1,000 feet is steep, but is just possible fora pack-horse.

The showing consists of a white quartz vein striking east-west along the top of the mountain
and dipping south. It varies from a stringer to 4 feet wide and can be traced for nearly 1,000
feet. It occurs on the hanging-wall of a greenstone dyke, in granodiorite country-rock, and is
somewhat sparsely mineralized with fine-grained galena, grey copper, specks of chalcopyrite,
pyrite, and calcite. Fissures and fractures are filled with limonite. Its eastern extremity out-
-erops in a vertical bluff overlooking a creek which runs into Copper river. A grab sample of