20

The vein filling is mostly calcite and country rock with a little quartz
and hornblende, together with the. metallics noted in the paragenesis.
Besides the main vein there are stringers in the country rock containing
galena and sphalerite.

On the south side of the spur there are two parallel veins; they strike
north 5 degrees east and dip northwest 45 degrees. The first, 4 feet in
width, is opened by short tunnels for several hundred feet, and is practically
solid zine blende cutting fine-grained, stratified tuffs. The second is
opened by a single cut and exposes a mineralized zone, 12 feet in width,
cutting coarse tuffs. This zone is made up of stringers of solid zine blende
cutting the country rock.

Table of Paragenesis of the Ores from the Brian Boru Property.

Actinolite and quartz
Pyrrhotite and pyrite (mostly earlier than the zine blende) :
Zine blende (containing specks of contemporaneous pyrrhotite and chalcopyrite
Chaleopyrite (veining zine blende)
Galena and jamesonite (veining chalcopyrite)
Calcite (in veins in all other minerals) : ae
_ Zine blende is the most abundant of the metallic minerals and the typical association of the
minerals is shown in Plate VIIA. There is not much galena and even less chalcopyrite in the ore.

The Annual Report of the British Columbia Bureau of Mines for
1915 states that assays give little or no silver, gold, or copper.

A large vein containing mostly galena was reported to have been
discovered and partly opened in 1917, but this showing was not seen
during the examination.

The veins are large and strong and it is not clear why the silver-
bearing tetrahedrite should be absent.

GENERAL STATEMENT. From the general conditions, this western side
of the batholith should prove good prospecting ground, since part of the
roof is preserved in places and it is in the sediments above the higher parts
of the granodiorite or in the granodiorite immediately below the old cover
that mineralization is most probable.

Properties on the West Slope of Rocher Déboulé Mountains.

HAZELTON VIEW PROPERTY. General Statement. This property is
owned by the New Hazelton Gold Cobalt Mines, Ltd., and adjoins the
properties of the Rocher De Boule and Delta companies to the west
(See Map 1731). The camp and workings are on the west face of the
mountain so that direct access may be had to the railway.

The granodiorite-sediment contact crosses the centre of the property;
some of the veins are wholly in the sediment and the main vein crosses
from the granodiorite into the sediments with apparently little change.

The main tunnel is situated at about 5,500 feet elevation and is con-
nected with the camp at 4,150 feet elevation by an aerial tram; from the
camp to the railway the ore is being taken by pack train until a road is
completed.

Several trial shipments have been made of the ore and development
work is being continually pushed; two lower adit tunnels are being driven,
and it is expected that this property will ship in 1918.

The ore is valuable for its content of gold and molybdenite especially,
and contains little if any chalcopyrite.

Description of the Veins. There are several veins crossing the property
of the New Hazelton Gold-Cobalt Mines, Ltd., of which the main vein is