42

the Kleanza company in 1919. Columario Gold Mines, Limited, was formed
in 1927 and carried out active development work for several years until
succeeded in 1933 by Columario Consolidated Gold Mines, Limited. This
company installed a new and complete mining plant and built a flotation
mill with a daily capacity of 75 tons. The mill is close to the Terrace-Usk
highway on the north side of Noble Five creek and is connected with the
mine workings by a 12-bucket aerial tramway 4,800 feet long. About 8,000
feet of underground development work was done prior to the cessation of
mining operations on May 31, 1935. The mill was operated from Septem-
ber 1934 until June 22, 1935, since which date the plant has lain idle.

The mine is on the southeast border of a tongue of the Coast Range
batholith, about 3 miles wide, which intrudes Jurassic voleanic rocks. The
contact is very irregular and the andesitic volcanics in the mine workings
are intruded by a great variety of smaller stocks and tongues of the grano-
diorite. The lower slopes of Kleanza mountain below the mine are under-
lain by the granodiorite, but at higher elevations the volcanic rocks are
predominant. Both the andesitic volcanic rocks and the granodiorite are
cut by quartz albite, diorite, and lamprophyre dykes.

The quartz veins occur along a system of fault fractures, all of which
strike from south 30 to south 45 degrees east and have an average dip of
50 degrees northeast. Most of them are in the andesite near intrusive
masses of the granodiorite or along a fault contact between these rocks.
Where faults pass through the granodiorite the veins tend to pinch out
within a short distance. This factor is of economic significance as a large
number of irregular-shaped bodies of granodiorite have been encountered
in the mine workings. In adit No. 3 veins occur on both sides of, and
within a few feet of, a 3-foot quartz albite dyke. Where they cross the
dyke they are narrow and lean. The veins are barren in many places, but
where they are mineralized with seams of coarse pyrite a fair amount of
gold occurs. In some cases the pyrite is accompanied by small amounts of
chalcopyrite and galena. The veins average from 1 to 3 feet in wicth with
eccasional short lenses 5 feet wide.

Altogether eleven adits have been driven in developing seven different
veins. Most of the work was done on three veins that lie about 150 feet
apart above the main haulage level. A brief résumé of the work done in
the individual adits follows. Assay results from a number of samples
taken in the various adits are also given.

No. 1 adit (main haulage level). Crosscutting, 1,550 feet; drifting,
80 feet; raise to No. 3 adit and raise to No. 4 adit.

No. 2 adit. Drifting, 300 feet; one short raise and a small stope. A
34-inch channel sample taken across the vein on the north side of the
portal assayed: gold, 0-025 ounce to the ton.

No. 3 adit. Drifting, 720 feet (east drift 175 feet and west drift 545
feet) ; and a raise to the east drift of No. 5 adit. A 12-inch channel sample
taken across the vein 175 feet from the portal assayed a trace of gold; a
19-inch sample 28 feet from the portal assayed 0-04 ounce to the ton in gold.

No. 4 adit. Drifting, 505 feet; crosscutting, 120 feet; two raises and
a stope through to No. 5 adit. The vein averages about 16 inches in width.