49

to the east on the Victoria claims would be No. 9. The next vein to the
east, No. 10, has not been discovered farther south. The correlation
between the veins of the Dunwell mine and those of Victoria mines may
not be correct, as the veins may not continue so far or may be offset by
faults. If, however, the veins continue the correlation is probably at
least approximately correct. In all, ten roughly parallel veins are, there-
fore, known west of Fault A.

The second group of veins, those lying between the two faults, are
also numbered irom south to north. Veins Nos. 11 to 16 are exposed in
the Portland Canal tunnel. A vein exposed on the east bank of the creek
followed by Fault A, a short distance south of the adit of the Glacier
Creek Mining Company, if projected south along the strike would corre-
spond approximately to vein No. 16 and accordingly is considered to be
No. 16. Veins Nos. 18, 19, and 21 are exposed in the adit on the George E
claim and farther south in the adit of Glacier Creek Mining Company in
which No. 21 is known as the Green vein. Another vein, perhaps a branch
of the Green or No, 21 vein, is present in the Glacier Creek Mining Com-
pany adit and is numbered 20. Vein No. 21 is a barren, quartz-calcite
vein of exceptional size on both the George E and Glacier Creek Mining
Company properties, and, therefore, the correlation of these two veins is
probably correct. The veins exposed in the adits on the Little Wonder
group, judging by their position, strike, and dip, are continuations of
No. 20 vein. No. 22 vein, perhaps a branch of the Dunwell or No. 23
vein, is exposed in adits Nos. 2 and 3 of the Dunwell mine. No. 23 vein
is exposed in all the Dunwell mine adits and on the surface.

The only veins known to be east of Fault B in the northern part of
the Portland Canal fissure zone are exposed in the Portland Canal tunnel
and are numbered 24 and 25.

All the veins of the Portland Canal fissure zone are very much alike
in most essential respects. They contain pyrite, galena, and sphalerite in
a gangue of quartz and calcite. Some hold ore and everywhere the grade
is low and uniform unlike the ore of nearby properties outside the fissure
zone, for these exhibit marked variations in grade. Apparently all the
veins in the Portland Canal fissure zone formed during one period and
were produced by the same agents acting under uniform conditions.

Only a few ore-shoots have yet been discovered in the veins of the
Portland Canal fissure zone and all are small. The sizes of the ore-shoots
seem directly proportional to the sizes of the containing veins.

GOLD-QUARTZ VEINS

Gold-quartz veins occur mainly in Georgia River area, The country
rocks are volcanic members of the Hazelton group bordered by a body
of Coast Range intrusives. The veins are commonly 8 feet or less wide
and locally contain several ounces of gold a ton. So far as.is known the
gold is largely in a free state. Locally the veins contain pyrite, galena,
and other sulphides, but in general they consist of milky white quartz
with very little sulphide. These veins resemble some of the quartz veins
that occur near the batholith boundary in Marmot River district. Their
nearness to the Coast Range intrusives and their gold content are factors