9]

biotite and chlorite may be older than the ore, but some biotite flakes are not parallel to the shear planes and, therefore, are apparently later than the shearing. The ore-body is cut by many acid and basic dykes, some of which show slight offsets. One large, irregular dyke about 30 feet wide has a basic border and an acid rock interior. It rises to the shear zone but does not enter it.

The ore-body consists of copper ore of 3 per cent grade. The copper mineral is chalcopyrite and is in many places quite pure. Pyrrhotite, sphalerite, and pyrite also occur in the ore. Silver and gold values amount to a dollar or less a ton. The ore that lies in severely crushed rock or near faults and dykes is richer in copper than it is elsewhere. This increase in richness seems due to an increase in the amount of chalcopyrite at the expense of the other sulphides. Pyrrhotite is most plentiful along the hanging-wall in the form of small masses commonly separated by streaks of schist from the main ore-body. Sphalerite is less plentiful at the lower end of the ore-body than higher up. In several places in the ore-body it is evident, as shown by the preservation of rock texture and by the presence of unreplaced folia of schist, that the ore formed by replacement.

Carpenter’s Claims (Lecality 119) Reference: Annual Report of the Minister of Mines, British Columbia, 1922. Carpenter’s claims are at an elevation of 3,500 feet on Kshwan river

12 miles east of the head of Hastings arm. Several quartz veins that con- tain pyrite and a little chalcopyrite are known to be present.

Deadwood and Quartz Groups (Locality 194)

References: Annual Report of the Minister of Mines, British Columbia, 1922, 1927, 1980, and 1931.

The Deadwood and Quartz groups adjoin and lie north of the Hidden Creek group at Anyox. The country rock consists of amphibolite bounded on the east by argillite. The contact and the sediments strike north.

On the Quartz group a vein up to 18 feet wide lies in argillite and parallels the bedding of the sediments. The vein has been traced by open-cuts for 2,000 feet. It consists of milky quartz in general barren, but locally containing a little pyrrhotite, chalcopyrite, and other com- mon sulphides.

On the Deadwood group the mineral deposit occupies a shear zone in amphibolite. The shear zone strikes north and has been traced for a length of 1,500 feet. The zone contains quartz stringers and sparsely disseminated chalcopyrite and pyrrhotite.

Elkhorn Group (Locality 117) References: Annual Report of the Minister of Mines, British Columbia, 1929 and 1930.

The Elkhorn group of four mineral claims is at an elevation of 3,500 feet west of the head of Hastings arm. The claims adjoin those of the Saddle group.