— a

50

were seen in the open-cuts between the cut just described and the portal of the adit. In most of these cuts the sulphides have been oxidized and are mostly leached out by surface waters.

A representative sample of the solid sulphide ore, collected from a small heap of ore stacked at the portal of the main adit, assayed: gold, 0-13 ounce a ton; silver, 0-73 ounce a ton; copper, 15-03 per cent. A 5-inch channel sample taken across the vein in the adit, 70 feet from the portal where the sulphide present is chiefly pyrite, assayed: gold, 0-015 ounce a ton; silver, 0-23 ounce a ton; copper, 2-50 per cent.

On the Delta Fraction claim the Highland Boy fissure zone is exposed on the northwest side of the steep mountain ridge between elevations of 5,900 and 6,000 feet. In an open-cut at elevation 5,950 feet the zone is 2 feet wide and it is abundantly mineralized with chalcopyrite. It strikes east and dips 50 degrees north. Between elevations 5,650 and 5,900 feet the smooth, striated foot-wall of the zone, along which the mineralization occurs, rises abruptly from a talus slope under which the deposit is concealed. Some of the gangue still clings to the foot-wall, but most of it has tumbled down the steep talus slide. At elevation 5,600 feet, an adit driven in below the zone extends 372 feet on an average bearing of north 60 degrees east. This adit lies parallel to the zone and 30 to 40 feet south of it. At 243 feet from the portal a crosscut runs 145 feet southeast, and from its end a branch crosscut extends 27 feet northeast. The zone would have been reached from the main adit by driving a crosscut northeast 30 or 40 feet.

There is evidence that a crosscut adit was driven towards the zone at an elevation of 5,856 feet, but this adit is now completely hidden by a talus slide.

Rocher Déboulé Mine (31)

References: Ann. Repts., Minister of Mines, B.C.: 1911, p. 80; 1912, p. 118; 1913, p. 107; 1914, p. 185; 1915, p. 77; 1916, pp. 106-108; 1917, p. 101; 1918, p. 111; Wee Pde 1929, p. 155; 1930, p. 188. Geol. Surv., Canada, Mem. 110, 1919, pp. 7-14.

The Rocher Déboulé mine is on Rocher Déboulé Mountain about 6 miles south of New Hazelton. The property is reached by a road 10:5 miles in length, which leads northeast from Skeena Crossing along the north side of Juniper Creek to the mine camp at elevation 4,000 feet. There are nine claims in the group, the Jack Pine, Timber Line, Iowa, Balsam Frac- tion, Balsam, Juniper, Third Fraction, Joe Fraction, and Log Cabin. Munroe and Sargent, original locators, transferred the property to Rocher Déboulé Copper Company, Limited, of Salt Lake City in 1911. During the next 2 years two strong fissure zones were explored by adit drift and con- siderable copper ore was blocked out. In 1914 Montana Continental Development Company, of Butte, Montana, secured a 2 years’ lease on the mine. They installed a small hydro-electric plant on Juniper Creek 5 miles above Skeena Crossing. A 12-drill compressor was set up at the lower adit at elevation 4,100 feet and an inclined surface tram was run up to the No. 4 adit at elevation 5,050 feet. A small gauge railway half a mile in length