110

Chicago Group (Locality 90)

References: Annual Report of the Minister of Mines, British Columbia, 1911; Geol.
Surv., Canada, Memoir 32.

The Chicago group of claims is north of the Ben Bolt and Jumbo claims
and all three are along the same fissure zone. A quartz vein up to 20 feet
wide in argillite was developed in 1911 by the Pacific Coast Exploration
Company.

Coast Silver Mines, Limited (Locality 97)
References: Annual Report of the Minister of Mines, British Columbia, 1925 and 1928.

The holdings of the Coast Silver Mines, Limited, consist of the Silver
Hill group. The group is 24 miles from Stewart, lies east of Portland canal,
and adjoins and lies south of the Silver Bell group. The claims are along
the contact between the Coast Range batholith and volcanic rocks. Several
quartz veins mineralized with pyrite, galena, sphalerite, and chalcopyrite
occur on the property.

Columbia Group (Locality 86)

References: Annual Report of the Minister of Mines, British Columbia, 1906, 1907,
1908, 1909, 1912, 1913, 1919, 1922, 1925, and 1926; Geol. Surv., Canada, Memoirs
32 and 159.

The Columbia group of mineral claims is on the middle fork of Glacier
creek and adjoins and lies west of the L and L group.

The country rock is augite porphyrite. The chief mineral deposit is a
vein 1 to 8 feet wide but in most places less than 3 feet wide. It lies in a
sheared and shattered zone striking northeast across the middle fork of
Glacier creek. The vein has been traced for 800 feet on the northeast side
and for 600 feet on the southwest side of the creek. Four drift adits have
been driven on the vein on the northeast side of the creek and one on the
southwest side. They are individually 45 to 90 feet long. Open-cuts expose
vein matter consisting of quartz, siderite, pyrite, galena, sphalerite, and
tetrabedrite. The vein matter in some of the open-cuts is ore, but no ore-
shoots have been definitely outlined. The vein matter in the adits is not of
commercial grade. The good ore found locally at the surface is probably
not due to secondary enrichment. Considerable development work was done
on this property in 1928, but is reported to have failed to disclose com-
mercial ore.

In 1910, 4 tons of ore containing 0-08 ounce gold, and 375 ounces silver
a ton, and 23 per cent lead, was shipped. In 1913 a shipment of 7 tons
assayed $114 a ton in silver and lead.

Cook and Dobson’s Claim (Lecality 90)
Reference: Annual Report of the Minister of Mines, British Columbia, 1906.

Cook and Dobson’s mineral claim is at the head of the south fork of
Glacier creek. Stringers of quartz making up a width of 8 feet are exposed
in an open-cut.