Whitesail Lake Map-Area

The lead-zinc deposits are narrow quartz veins occurring as fracture or
shear-zone fillings and are present on Mount Sweeney and Chikamin Range
close to small stocks of granitic rock; and on Swing Peak in fractures in a
porphyritic diorite. The relationships on Swing Peak date this mineralization
as post-Lower Cretaceous, and it is probable that the similar mineralization
on Chikamin Range and Mount Sweeney is of the same age.

Gold is common in most deposits but those noted mainly for their gold
content are large quartz veins close to the contact with the main mass of Coast
Intrusions and may be either in the dioritic or metamorphic rocks. Gold also
occurs in narrow veins in Hazelton group rocks on Sibola Peak and Huckle-
berry Mountain as well as at several other places in the area, but the veins
are too small and too low grade to be economic.

Copper and tungsten have been found in contact-metamorphic zones but
copper is also present in veins and shear zones.

Description of Properties
Lead-Zine Deposits

Mount Sweeney
Emerald Glacier Group (3)1

References: B.C. Minister of Mines, Ann. Repts.: 1916, pp. 164-165; 1919, pp. 104,
105; 1929, pp. 183, 184; 1945, p. 68; 1950, p. 101; 1951, p. 117; 1952, pp.
97, 143; Geol. Surv., Canada, Sum. Rept. 1924, pt. A, pp. 56, 57 (1925); Map
367A; Hedley, 1942, pp. 158, 159.

The Emerald Glacier group situated on the south side of Mount Sweeney
about 6 miles from Tahtsa River, was first staked in 1915 by W. J. Sweeney
and associates. It has received more active exploration to date than any other
property in the area. In 1917 and again in 1919 it was optioned to J. Cronin
of Prince Rupert, who drove a drift adit 125 feet along the vein zone at an
elevation of 6,385 feet, known as the 6,400-foot level (see Figure 4). Work
was resumed by the Consolidated Mining and Smelting Company of Canada
Limited between 1928 and early 1931, during which period the original adit
was extended and two more adits driven, one at elevation 5,989 feet, known
as the 6,000-foot level, and the other at 5,418 feet elevation, known as the
5,400-foot level. Results from this work were disappointing and no further
interest was shown in the property until 1949 when Emerald Glacier Mines

1Numbers in parentheses are those used on the accompanying map to indicate
the location of the property.

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