SAG We Ce ROMS eR ss er anes

COPPER SILVER VEINS OF TELKWA DISTRICT. 39

Limonite,
Covellite,
Azurite,
Malachite.

The proximity of these veins to the batholith, their association
with the altered volcanics which persist along the contact, and
their extension into the granodiorite itself are considered as
strong evidence that the veins are derived from solutions which
emanated from the intrusion. The presence of gold and silver
with lead, copper, antimony and zinc; the association of pyrite,
galena, chalcopyrite, tetrahedrite and zinc blende; the absence of
any large amounts of arsenic, molybdenum and such oxides as
magnetite, hematite and ilmenite or such silicates as biotite,
pyroxene, amphibole and tourmaline, and the general simplicity
of the deposit are all evidence that these veins were formed by
heated solutions at intermediate depths.

THE VEINS SITUATED IN THE VICINITY OF THE GRANODIORITE
SiN RUSION AL PEE CORE OF fie TELKWA MOUNTAINS.

The deposits of this group contain much more copper and silver
than those of the first, and include the most promising claims of

the district. Besides their greater economic value, they also pos-

sess a greater scientific interest because of the complexity and
singularity of their mineral associations and types of structure.

The group consists of ten or more slightly developed claims.
From three of the number, enough ore has been extracted from
small tunnels and open pits to make smelter shipments.

The situation of these deposits bears a direct relation to the
contact of the granodiorite intrusion, in that they form a ring
around the stock, none of them being farther than 114 miles and
none nearer than a mile. They are also situated just outside of a
zone of intense metamorphism which surrounds the stock. Al-
most all the claims are at an elevation of about 6,000 feet and all
happen to be exposed just where the steep walls of the glacial
valleys intersect the gentle slopes of the old upland.

The deposits are characterized by an abundance of bornite,

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