se

Compression during the emplacement of the intrusions, and the
fracture zones as a result of tension during the cooling of
the intrusive bodies. :

Included in this group are the following deposits:
Kohse copper; Black Hawk silver-lead-zinc; Erickson and Klawli
gold; and Chuchi tungsten. Their only feature in common is
their occurrence dlong shear‘or fracture zones close to and in
intrusive bodies. They have, presumably, originated from
solutions related to the Omineca intrusions.

The Kohse copper deposit comprises several mineralized
zones in sheared andesite, the widest being 55 feet. These
consist of quartz-carbonate veins up to 12 inches wide and
averaging 4 inches, each separated by 3 to 4 feet of altered
and mineralized andesite. The veins carry abundant chalcopyrite
and pyrite, and minor azurite and malachite. The same minerals
are disseminated throughout the intervening altered andesite.

On the Black Hawk property at least eight quartz veins,
ranging in width from 15 inches to 5 feet, occur within a belt
of fractured andesite 650 feet wide. The veins are mineralized
with galena, sphalerite, pyrrhotite, and pyrite, and the wall-
‘rocks are silicified and pyritized. A selected sample from
one vein. yielded QO. 015 ounce of gold and 29. 18 ounces of silver

a ton.

Wear ee head of the west fork of Klawli River
“numerous quartz-carbonate veins, up to 6 inches wide, occur in
_Lpfractured:.and ee andesite .:\ Free’ gold--was observed in one.

Two veins, 8 and 16 inches wide and Sparel) mineralized
with chalcopyrite and Be els CHANGERS in sheared argillite on
--the Brickson property.

Jenene ne miles south of the east end of Chuchi Lake, a-
pesominated deposit of scheelite, powellite, molybdenite, and
chalcopyrite occurs in a fracture zone at the Gontact of a
granitic stock with silicified andesite. The mineralized zone
is at leass.12 feet wide. Two samples averaged 0.075 per cent
wo 0.015 per cent MoSe, @ trace of gold, and 0.70 ounce of.
silver a ton.

Other Deposits. Near the summit of the peak north of
the east end of Nina Lake a mineralized zone, at least 8 feet
wide and containing malachite and pyrite, occurs in a 200-foot
band of carbonatized, silicified, and pyritized andesite and
argillite. A selected Specimen assayed 4.83 per cent copper
and 0.005 ounce of gold a ton.

The Blackburn deposit consists of a pyritized fracture
zone in cherty limestone.

Quartz veins sparsely mineralized with sulphides, and
assaying a trace of gold and silver outcrop on Granite Creek
and near the east end of Germansen Lake.

A small low-grade showing of asbestos occurs in a
serpentine sill phy ce anriaiee on Germansen River near the Farrell

deposit.

Meny barren, white quartz veins outcrop in the
Wolverine Range. The ‘pegmatites of the Wolverine complex contain