113

No. 2 adit and very little if at all deeper than No. 4 adit. It lies mostly
in the Dunwell vein but extends for 20 feet or less north of the junction
with the North-South vein. The vein where it holds the ore shoot and above
and below the ore shoot is wider than elsewhere. The North-South vein
north of the ore shoot is less than 3 feet wide. The Dunwell vein south of
the ore shoot is also less than 3 feet wide. .

The Dunwell vein lies in the Portland Canal fissure zone and like many
of the veins and all of the known ore-bearing veins in the Portland Canal
fissure zone is associated with a pre-mineral dyke that is present in all
the underground workings below No. 2 adit where the vein is lean as well
as where it is rich. The dyke probably guided or held the ore-forming
solutions within certain channels, but probably had very little to do with
the origin of the ore shoot.

The Dunwell vein has been entered by four adits. The highest adit,
No. 1 adit, is at an elevation of 1,750 feet. No. 4 adit is the lowest and its
portal is 500 feet below and 1,800 feet southwest of that of No. 1 adit. A
winze has been sunk on the vein for a short distance below No. 4 adit and
diamond drill holes crosscut the vein 100 feet below the adit.

The mill feed was the ore as mined and carried lead, zinc, silver, and
gold. The chief mill products were: galena concentrates containing lead,
silver, and gold; and sphalerite concentrates containing zinc, silver, and
gold. Two hundred tons of run of mine ore shipped in 1926, prior to the
erection of the mill, assayed 0°6 ounce gold, 24 ounces of silver, 19 per cent
lead, and 16 per cent zinc. The grade of this shipment was better than the
average of the ore mined. The production in 1927 was 27,067 tons of ore
yielding 4,805 ounces gold, 102,200 ounces silver, 1,264,700 pounds lead,
and 1,608,600 pounds zinc. Part of the holdings of the company was
worked in 1982 by leasers who produced 27 tons yielding 23 ounces gold,
2,495 ounces silver, 2,611 pounds lead, and 221 pounds copper.

Emma Gerdon Group (Locality 102)
Reference: Annual Report of the Minister of Mines, British Columbia, 1914.

The Emma Gordon group of claims is on the east shore of Portland
canal a short distance south of Marmot river. Small stringers of sphal-
erite, pyrite, chalcopyrite, and galena occur in diorite. A small shipment
of ore assayed 0-08 ounce gold, 66-4 ounces silver, and 0:56 per cent
copper.

Emperor Mines, Limited (Locality 68)
References: Annual Report of the Minister of Mines, British Columbia, 1923, 1924,
1925, 1926, and 1927; Geol. Surv., Canada, Memoir 159.

The holdings of Emperor Mines, Limited, are situated between Glacier
and Bitter creeks at an elevation of 3,000 feet. A good deal of snow was
on the ground at the time the property was visited and some of the open-
cuts were not visible.

Prior to 1925 the holdings were referred to as the North Line group.

The country rock is argillite of the lower part of the Hazelton group
striking north and dipping west at moderate angles. Numerous dykes and
i of quartz diorite, gabbro, and lamprophyre occur intruding the argil-
ite.