/ 105

About 2,000 feet east of where the east bounda~y of lot 55 crosses

the creek, Messrs. C. H. Colgrove, A. McLarty, and 8. A. Gillis have’

driven a tunnel into quartz sericive schist on the south side of the creek. The rock here is very much altered to red clay and the tunnel had fallen in and was inaccessible upon our visit. It is 150 feet long with two short crosscuts and encountered one vein 2 to 4 feet wide and many small stringers. Values are said, by Mr. C. H. Colgrove, to be from 40 cents to $14 in the schist and $40 in a 6-inch vein. Galloway! found a trace of gold in a sample of schist collected by him from the dump and 0-2 ounce of gold in a 6-inch stringer.

_ Just below the camp of Dougald Cameron, on Government creek, 4 miles from its junction with Hixon creek, are black clay schists and grey schists striking north 39 degrees west, intruded by a dyke of hornblende diorite. ‘The dyke forks at the creek, one branch being 100 feet and the other 40 to 50 feet wide, with black slate lying between. The strike of the dyke is approximately north 60 degrees west with dips of 70 degrees and more to the northeast. It is foliated, the planes of schistosity striking north 67 degrees west and dipping 40 degrees to 50 degrees to the north. Quartz stringers occur in the clay schists at and near the contact. Pyrrho- - tite and some pyrite are disseminated through the diorite, and altered zone of black material, apparently manganese oxides, trend with the foliation planes. According to Mr. Cameron values in gold and silver have been obtained from samples taken across the face of a part of the dyke and picked samples have run as much as $17.20 in gold.

STONE CREEK.

A property owned by the Nechako River Mines, Incorporated, and man- aged by W. West, Prince George, was examined on Stone creek. The claims lie on lot 4618 about 5 miles by trail up Stone creek which enters Fraser

‘river from the east 20 to 35 miles south of Prince George (Figure 1, locality 3). Two tunnels have been driven, one 95 feet long on the south side of the creek, the other 55 feet long on the north side. The country rock which is much broken consists of white to grey quartzites, phyllites, and black clay schists. A brecciated quartzose phyllite called “porphyry” at the mine carries pyrite in quartz stringers and disseminated in the country rock. Two faults striking west 12 degrees north and northwest and dipping south and southwest 20 degrees and 70 degrees were seen in the northern tunnel. A vertical brecciated contact between black clay schist to the north and brecciated quartzite had a strike of north 2 degrees east and a vertical_dip. Mr. West stated that gold values up to $1.50 per ton, 4 ounces in silver, and 14 per cent of lead, had been found in samples from the southern tunnel and that a sample across a 6-foot face in the northern tunnel assayed $2 in gold, 4 ounces of silver, and a trace of copper to the ton. The writer sampled across the roof of the northern tunnel in a spot thought to be favourable by Mr. West. The result of an assay in the Mines Branch showed no traces of gold, copper, or silver. About half a mile east of the tunnels on the north bank of Stone creek are outcrops of much crumpled, black clay schist striking west 36 degrees east and dipping 73 degrees east. A zone 12 feet wide across the strike carries quartz and calcite with pyrite and chalcopyrite lyimg in the quartz and disseminated in the country rock.

1Galloway, Ibid, p. 128.

(hb aoa ig Btn Ede hn SY A Du os L2

PTR rE w= ik a ina REN