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Silver Crest Mines, Limited (Locality 14)

References: Annual Report of the Minister of Mines, British Columbia, 1919, 1920,
1922, 1924, 1925, 1926, and 1927.

The holdings of the Silver Crest Mines, Limited, consist of the Silver
Hill group of claims on the southeastern slope of mount Dilworth. The
claims are underlain by argillite cut by dykes of many types. Most of the
larger dykes are of quartz porphyry. The deposits are mainly confined to
the quartz porphyry or other acidic types of dykes. Some are pegmatitic
phases of the dykes containing well-crystallized ore minerals and quartz.
Others are quartz gashes containing pyrite, sphalerite, galena, chalcopyrite,
polybasite, and native silver. The occurrences suggest strongly that the
ore minerals are end products of crystallization of the dykes in which they
are found. The deposits appear to be small and sporadically distributed in
the dykes. A small shipment of ore returned 257 ounces of silver to the ton.
Underground work consists of two adits with a combined length of over
500 feet.

Silver Tip Mining and Development Company (Locality 15)

References: Annual Report of the Minister of Mines, British Columbia, 1917, 1919,
1920, 1922, 1925, 1926, 1927, and 1928.

The holdings of Silver Tip Mining and Development Company consist
of the Silver Tip group of claims south of mount Dilworth between the
Unicorn group and the holdings of Silver Crest Mines, Limited.

The property is underlain by the belt of dykes. Some of the deposits,
as in the case of those on the Silver Crest group, are in quartz porphyry or
other acid types of dykes. Others are in volcanics and sediments intruded
by the dykes. One of the earliest discoveries was a galena vein about 18
inches wide and containing 120 ounces of silver a ton. Another vein lies
between a quartz porphyry dyke forming the foot-wall and argillites form-
ing the hanging-wall. The vein strikes east, dips 35 degrees south, and is
about 44 feet wide. It contains galena, and samples assay up to 100 ounces
of silver a ton. Two similar but somewhat narrower, parallel veins occur a
few hundred feet away between porphyry dykes and other rocks. Several
other veins occur in quartz porphyry dykes.

Silverton Group (Locality 1)

The Silverton group of claims is west of Tide Lake flats, adjoins the
Silver group, and lies several miles north of Summit lake. The mineral
deposits are reported to be similar to those on the Silver group.

Troy Group (Locality 6)
References: Annual Report of the Minister of Mines, British Columbia, 1924, 1925,
1926, 1927, and 1930; Geol. Surv., Canada, Sum. Rept. 1931, pt. A.

The Troy group of claims is east of the northern end of Salmon River
glacier. T'wo veins occur in the lower beds of a series of argillites overlying
volcanic rocks to the northwest. The argillites strike north to northeast and
dip east. The veins are up to 3 feet wide and lie in narrow shear zones.
They contain quartz, pyrite, sphalerite, galena, tetrahedrite, and chalco-
pyrite. Samples give high assays in silver. Silicified zones with pyrite
occur in the volcanic rocks.