32

is also shown by surface exposures to extend 100 feet beyond the end of
the tunnel. The full length of the ore-body is not yet (in 1909) known.
The magnetite is associated with chalcopyrite in grains and bunches,

pyrite, and pyrrhotite. The non-metallic . . . . minerals usually
accompanying similar deposits are not conspicuous. . . . A second

magnetite mass : apparently developed in porphyrite . . .
occurs 800 feet northwest of the one tunnelled. It has not been fully
defined but is . . . . fully 100 feet in width and 200 feet in length.
Porro Magnetite outcrops, probably marking a line of lenses, are
also stated to extend down to the beach.’”!

This deposit, after having been seen in 1913, was described by G. D.
Forbes in part as follows.2 ‘The surface shows a large deposit of magne-

tite . . . . exposed on the company’s claims for over 500 feet and
- . . (traceable) some considerable distance (further) . . . 5g
dipping to the north at 75 degrees. . . . A tunnel has been driven

300 feet southerly, crosscutting the ore and country rock, the face ;
being in porphyry. In all, the tunnel has cut 134 feet of magnetite ore,
in separate bodies, from 4 to 28 feet in width and separated by . . . .
dykes and bodies of limestone.” . . . A section along the tunnel wall
shows nine masses of ore or ‘‘mixed ore’’ separated by stretches of country
rock 25 to 56 feet wide.

From the above descriptions it is apparent that the deposit, by reason of
the sulphides present and the many broad partings of country rock, is not an
iron-ore deposit. If it were to prove practicable to mine and treat the
deposit both for its copper and iron ore content, a large supply of iron
ore doubtless would be available.

(9) Burnaby Island

A body of magnetite occurs on a mineral claim, owned by A. Heino,
on Burnaby island. The deposit may be reached by a trail which leads
from an unnamed bay whose south entrance is Granite point on the south-
east shore of Burnaby island. The trail starts from a shingle beach on
the north side of the bay about opposite the inner end of a large island.
It leads northerly and in a distance of somewhat less than 14 miles crosses
a large stream, and just beyond ends at the outcrop of magnetite at an
elevation of about 250 feet close to the foot of the north-facing slope of a
high ridge.

About 50 feet below and 100 feet north of the west end of the outcrop
of magnetite there is on the trail a small outcrop of rusty weathering,
somewhat impure, magnetite. Thirty feet west of this is an exposure of
grey, crystalline limestone. The main showing of magnetite consists of a
nearly continuous outcrop, 70 feet long in an east-west direction and in-
creasing in width from less than 5 feet at the west end, to 18 feet at the
east end. The exposure is on a steep slope and at the east end ranges
through a height of 25 feet. The magnetite is nearly pure. Very little
garnet is present and only a trace of sulphides. At the west end, the
magnetite is overlain by grey, crystalline limestone. At the east end the
outcrop is terminated by a fine-grained, igneous rock. The other bound-
avies of the magnetite exposures are against drift and talus. Eastward

1 McConnell, R. G.: Op. cit., p. 81.

See also Robertson, W. F.: Op. cit., p. 78.
Forbes, D. G.: Op. cit., pp. 96-97.