84

The more easterly zone is traced for 400 feet along its strike by an
adit and several open-cuts. The adit, at elevation 3,400 feet, follows two
or more roughly parallel fissures 4 to 5 feet apart, for a distance of
62 feet. These are largely barren for 40 feet from the face of the adit,
but near the portal carry narrow sulphide seams ranging from 2 to 6 inches
in width. Above the adit some ore was removed years ago, as evidenced
by a trench 6 feet deep that follows along the zone for 75 feet. In a large
open-cut 350 feet up the hill from the adit there is a 12-inch zone of
brecciated, sheared rhyolite carrying galena, sphalerite, and a little
tetrahedrite. The zone strikes north 35 degrees east and dips 75 degrees
southeast. Along its northwest side, in a distance of 12 or 15 feet, it is
joined by several branch fissures. They lie several feet apart, strike south
65 degrees west, and dip steeply southeast. They do not extend over
20 or 30 feet from the main fissure, but near the latter carry 1 to 2 inches
of almost solid sulphides, chiefly galena and sphalerite and some tetra-
hedrite. At the surface this ore is oxidized to a soft, rusty, friable material
with a yellowish white oxidation product dusted over it. A sample of this
material assayed: gold, 0:06 ounce a ton; silver, 24-42 ounces a ton;
lead, 11-13 per cent; zinc, 7-83 per cent.

Henderson Group (Duthie Mine) (56)

References: Ann. Repts., Minister of Mines, B.C.: 1908, p. 64; 1914, p. 216; 1922,
p. 109; 1923, p. 108; 1924, p. 94: 1925, p. 135; 1926, p. 129: 1927, p. 134: 1998,
p. 159; 1929, p. 161; 1930, p. 189; 1934, p. C9. Geol. Surv., Canada, Sum.
Repts.: 1908, p. 45; 1925, pt. A, p. 180; Prel. Rept., Paper 36-20, 1936, p. 88.

The Duthie mine (See Figures 9 and 10) is on the southwest slope of
Hudson Bay Mountain 74 miles west of Smithers. The principal mine
workings (See Figure 9) are between elevations of 3,200 and 4,000 feet
on the Raven, Raven Fraction, Henderson, and Hummingbird mining
claims. These claims belong to the Henderson group, which includes the
Canary, Galena Queen, Dome, Dome Fraction, White Swan, Pacific, and
Vancouver Crown granted claims. The property is owned by J. F. Duthie
of Seattle. A good motor road about 15 miles long connects the mine with
the Canadian National Railway at Smithers.

The mine has not been operated since 1930, but in earlier years was
well known as a producer of silver, lead, and zine. Most of the ore mined
came from the Henderson vein-lode on the Henderson mining claim.
The Ashman and Fault Plane vein-lodes also furnished considerable ore.

The British Columbia Minister of Mines reports record surface work
by Boyd and J. K. Ashman on the Henderson claim, and by M. Hannah,
G. Holbrook, and Geo. Charlton on the Hummingbird claim in 1908.
On the Henderson claim the early work was confined to the Ashman
vein-lode, but following the discovery of the Henderson vein-lode in 1921
and the disclosure of its high silver content, the property was bonded by
J. F. Duthie. Underground operations commenced in 1922 with the driving
of three drift adits known as the Compressor, McPherson, and Thompson
levels. In 1923 the Federal Mining and Smelting Company obtained a
controlling interest, and an operating company known as Duthie Mines,