54

This ore is quite good, but the shoots so far developed are small.
Perhaps the best development on this property would be to outline par-
ticular ore-shoots rather than to prove depth in veins which although they
contain ore-shoots are for the most part too lean to constitute ore. One
or two of the veins exposed in short adits on the hillside above the Main
Reef vein are well mineralized and probably contain ore on a par with
that shipped.

SUNBEAM MINERAL CLAIM

The Sunbeam mineral claim is part of the holdings of the Dunwell
Mines, Limited, and lies between the main workings of the Dunwell
Mines, Limited, and the Victoria Mines, Limited. The Sunbeam claim
was staked many years ago and a vein was exposed by open-cut, but
most of the development consisting of open-cuts and a crosscut adit was
done recently by the Dunwell Mines, Limited.

Two quartz sulphide veins are known. The lower, known as the
Sunbeam vein (No. 8, Figure 12), has been traced for 600 feet. It is
3 feet wide and is locally well mineralized with galena, pyrite, and
‘sphalerite, and contains as well some tetrahedrite and native silver. The
vein follows a narrow greyish dyke. The other vein, known as the Sulphide
vein (No. 9, Figure 12), lies 200 feet east of, and parallel to, the Sunbeam
vein. This vein is 2 to 6 feet wide, contains pyrite, galena, and sphalerite.
Sunbeam vein follows a small dyke. The crosscut adit cuts these veins
at depths of 180 and 260 feet respectively. The veins where cutting the
adit are smaller and so sparsely mineralized that they were not developed
further.

DUNWELL MINES, LIMITED

The Dunwell mine is on the east side of Bear river north of Glacier
creek between the Sunbeam claim on the north and the George E claim
on the south. The elevation of the lowest adit is 1,250 feet and of the
highest 1,750 feet. The country rock is argillite of the Bitter Creek
formation. Several quartz-sulphide veins cross the property and one
of them has been the objective of extensive underground work during
the past few years. After concluding tests, on the concentration of the
ore, the company in 1926 erected an aerial tramway somewhat over a
mile long connecting the mine with a 100-ton per day mill which the
company built in the same year. Milling operations began early in 1927
and ceased later in the same year.

Several quartz sulphide veins are exposed in the Dunwell mine work-
ings, but only one of them is of commercial importance. The North-
South vein, fault A of Figure 12, is cut by adits Nos. 2, 3, and 4 of the
mine. Fault A is shown on Figure 12 as A-4, A-3, ete., depending on
which level or adit is represented. The veins encountered in the work-
ings west of this fault (Nos. 5, 6, and 7, Figure 12) consist of quartz with
very sparse sulphide mineralization and have not been followed up. A
quartz vein east of the fault (No. 22 in Figure 12) was found in No. 2
and No. 3 adits, but although it contained some galena, sphalerite, and
pyrite, was below commercial grade and was explored only ‘by two short
adits. The Dunwell vein, exposed on the surface and in the four adits,