59

__ At least four quartz-sulphide veins are exposed at the lowest work-
ings. They have been traced on the surface for lengths of about 400
feet. They are roughly parallel and strike northwest. The two upper
veins dip northeast and the two lower ones southwest. The largest, which
is one of the two lower veins, is 5 feet wide at its junction with a branch
vein. It contains quartz, pyrite, chalcopyrite, galena, sphalerite, tetra-
hedrite, and native silver, and at the junction with the branch vein is
high-grade silver ore. A crosscut adit was driven to intersect this vein
at a depth of 170 feet, but did not achieve its object, although it is long
enough to have passed the vein. The other three veins are in most places
less than 2 feet wide, but contain local bunches of rich silver ore.

The new discoveries are four quartz-sulphide veins.1 One of the
veins contains a shoot of ore about 1 foot wide and 150 feet long. Ore
has already been shipped from two of the veins.

PROSPERITY GROUP

The Prosperity group of mineral claims is above 5,000 feet on
the east slope of the mountain between Portland canal and Kate Ryan
creek (the north fork of Marmot river). The group adjoins the holdings
of the Porter Idaho Mining Company on the north.

The claims were staked a few years ago following discoveries of high-
grade silver ore on the Porter Idaho group. The original locators made a
few open-cuts on the discovery vein and shipped a few tons of high-grade
silver ore. In 1927 a controlling interest in the group was purchased by
the Premier Gold Mining Company, Limited. This company drove a
crosscut adit in 1927 crossing the discovery vein 80 feet below the out-
crop, and has commenced the driving of a long crosscut adit to develop
the vein at greater depth. The portal of the long adit is on Porter Idaho
ground.

The country rock consists of tuffs, breccias, rhyolite, and andesite of
the Bear River formation intruded by a few lamprophyre dykes. The vol-
canic rocks on the Prosperity group and from there to the top of the
mountain strike northeast along the hillside and dip at moderate angles
northwestward into the mountain. The dykes are practically vertical and
strike north-northwest. A short distance south and southeast on the
adjoining Porter Idaho and Aberdeen properties the rocks are sheared
locally, but on the Prosperity group shearing is not evident.

Several quartz-sulphide mineral deposits are known on the group,
three of which have been explored by open-cuts (See Figures 13 and 14).
The deposit on which most of the work has been done is a vein that has
been traced on the surface for 400 feet. It strikes north-northwest and
dips 50 degrees westward. It appears to narrow and becomes less well
defined to the north, but may continue north of the last known outcrop
which is at an elevation of 5,550 feet. To the south at an elevation of
5,325 feet it enters the holdings of the Porter Idaho Mining Company
where it has also been traced for 400 feet to an elevation of 5,100 feet.
The vein is 2 to 6 feet wide and consists of quartz mineralized with pyrite,

1“Preliminary Review and Summary of Mining Operations for the Year 1927 in B.C.”’; Minister of Mines, B.C.