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Dominion Group (Locality 98)

References: Annual Report of the Minister of Mines, British Columbia, 1927; Geol.
Surv., Canada, Memoir 159.

The Dominion group of mineral claims is close to the glacier on Kate
Ryan creek, and opposite the Porter Idaho mine. The country rocks are
tuffs and lava flows of the lower part of the Hazelton group volcanic rocks.
They strike northwest and dip northeast at moderate angles. Argillites
outcrop in a broad belt west of the property. A crosscut adit at an eleva-
tion of 3,750 feet has been driven northeastward for 90 feet. Several open-
cuts on the precipitous slope above the adit disclose narrow quartz veins
mineralized with pyrite, chalcopyrite, sphalerite, and galena. The veins
seen are chiefiy narrow stringers. Between 400 and 500 feet above the adit
are three rusty zones striking northwest and dipping northeastward at
moderate angles. They lie parallel to the strike and dip of the rocks and
may be beds of tuff partly replaced by ore minerals.

Dunwell Mines, Limited (Locality 78)

References: Annual Report of the Minister of Mines, British Columbia, 1920, 1922,
1923, 1924, 1925, 1926, 1927, 1928, and 1932; Geol. Surv., Canada, Memoir 159.

The Dunwell mine is on the east side of Bear river north of Glacier
creek between the Sunbean claim on the north and the George E. claim on
the south. In 1926 a 100-ton mill was built and connected with the mine
by an aerial tramway somewhat over a mile long. Milling began early in
1927 but ceased later in the same year. The elevation of the lowest adit is
1,250 feet and of the highest 1,750 feet.

The country rock is argillite of the lower part of the Hazelton group.
Several quartz-sulphide veins cross the property. One of them, the Dun-
well vein, is exposed on the surface and in the four adits, and is the only
ore-bearing vein so far discovered in the mine. One of the other veins
occupies a fault fissure and is known as the North-South vein. The Dun-
well vein joins the North-South vein and the two continue north as one.
North of the junction the vein is known as the North-South vein. The
Dunwell vein is 1 to 7 feet wide, and on No. 3 level, where it has been
drifted on for the greatest distance it and the continuation known as the
North-South vein have a combined known length of 800 feet. The Dun-
well vein has been followed down the dip for about 800 feet to a vertical
depth of some 550 feet. The Dunwell vein has an average dip of 42 degrees
and the North-South vein a dip of approximately 50 degrees. The Dunwell
vein throughout most of its known length and depth lies on one or the other
or on both sides of a dyke 6 inches to 2 feet wide, but the dyke is known
to be present only below No. 1 level.

The Dunwell vein consists of quartz mineralized with pyrite, galena,
sphalerite, and tetrahedrite disseminated through the quartz and in some
places making up 75 per cent of the vein. On the surface and in No. 1 adit
the vein is 5 feet wide, locally contains 50 per cent sulphide, but is not of
commercial grade. Only one ore-shoot is known. It has a maximum strike
length of 100 feet, a dip length of about 500 feet, and averages probably
more than 4 feet in thickness. The ore shoot does not extend higher than