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It has been suggested! that the metalliferous solutions entered the gently
inclined volcanic assemblage along steeply dipping fractures or sets of
fractures, and spread out from them to deposit their metal content mainly
in particularly favourable beds of tuff. None of the mineralized areas is
adequately exposed (1945). One, on the northeast face of the mountain,
may be 50 feet wide and extend more than 300 feet up the slope. Another,
on the southwest side of the mountain, has been observed at intervals for
more than 500 feet along a line trending about south, but its width is not
known. A selected sample of medium-grained, reddish, mineralized tuff
from talus on the northeast side of the mountain contained?: gold, 0-005
ounce a ton; silver, 12-76 ounces a ton; and copper, 14:98 per cent.
Samples taken by the owners contained somewhat less copper and silver,
but, like the above example, carried about 1 per cent copper to each ounce
of silver.

Lead and Zinc

Only three small occurrences of galena, sphalerite, and associated
minerals were considered to be worth sampling. All are within members
of the lower division of the Takla group.

Several white calcite veins cut thin-bedded, black, tuffaceous argillite
and tuff 54 miles west-northwest of the mouth of Quenada Creek. The
strata strike north 15 degrees west and dip 20 degrees west. One vein was
examined, and strikes north 75 degrees east and dips about 80 degrees
south. It is about a foot wide and is exposed for an estimated length
of at least 300 feet. The walls are sharp. Sphalerite, chalcopyrite, and
galena in places comprise as much as 20 per cent of the vein matter,
and are accompanied by much earthy, yellowish brown iron oxide. A
selected sample contained: gold, 0-0025 ounce a ton; silver, 0-165 ounce
a ton; copper, 0-06 per cent; lead, 0-02 per cent; and zinc, 9:95 per cent.
Other veins in the vicinity, although seen only from a distance, appear
to be wider than the one examined, but are not known to contain metallic
minerals.

A vein of calcite, quartz, sphalerite, and chalcopyrite, 3 miles south-
west of the mouth of Quenada Creek, is 6 inches wide and exposed for a
length of 2 feet. It provided a selected sample containing: gold, trace;
silver, 1-67 ounces a ton; copper, 5-41 per cent; lead, none; and zinc,
14-36 per cent.

Five miles northeast of Mount Carruthers a gabbroic dyke, about
100 feet wide, cuts dark green tuffs of the Takla group. In the dyke are
short exposures of two veins, about 5 feet apart, that strike about east
and dip 20 degrees south. They are 2 and 14 inches wide respectively, and
are composed of chalcopyrite, galena, sphalerite, pyrrhotite, dark brown
limonite, and a little banded crystalline quartz. A selected sample from the
widest vein assayed: gold, 0-01 ounce a ton; silver, 9°55 ounces a ton;
copper, 0-82 per cent; lead, 7-15 per cent; and zinc, 1-00 per cent.

1 Lougheed, M. S.: Yukon Northwest Explorations, Limited.
2 Sample collected by the Geological Survey in 1941.