=69=

deposits include gold, gold-molybdenum, gold-cobalt-arsenic,
tungsten, zinc, silver-lead, and mixtures of eae Very high-
grade, hand-sorted gold-cobalt-arsenie and gold-molybdenum ores
were produced in small quantities. High-grade silver ore also
occurs. The area appears to have prospecting possi  ilities for
all these types of deposits and there seem to be good chances

of finding small, valuable gold, gold-molybdenum, or gold-cobalt-
arsenic deposits.

Rocher Déboule mountain has a large core of grano-
diorite that cuts bedded rocks consisting mainly of tuffs. Most
of the deposits occur within the granodiorite or extend a short
distance into the tuffs beyond the contact. They occur along
fissures and cut dykes in the granodiorite. Other deposits have

been found half a mile or more beyond the contacts.

Rocher De Boule Mine. Rocher De Boule mine, between 1915 and

s O'Neill, J.J.: Economic Geology of Hazelton District:
Geol. Surv., Canada, Mem. 110, p.7, (1919).
Ann. Repts. Minister of Mines, B.C., 1929,
Wo LSS IOS do LSS

1918, mined and shipped 39,833 tons of ore and recovered 4,214
ounces of gold, 62,865 ounces of silver, and 5;746,506 pounds
of copper with a gross value of about $1,350,000. In 1929
seventy-two tons of hand-sorted ore was shipped and assayed:
gold, 0.14 ounce; silver, 40 ounces a ton; and copper, 4 per
cent. Production occurred mainly when the price of copper
ranged between 22 and 32 cents and ceased when the price fell
below these levels. All liabilities had been paid off and a
considerable return on investment was made. A considerable
amount of milling ore was proved and it had been planned to

install a concentrator.