ized with galena. The trend of the open-cuts indicates that the strike of the vein is
about north 30 degrees east. Two samples (130F and 131F) were taken from the dump
of the central cut. Selected solid galena (130F) assayed: Gold, trace; silver, 31.6 oz.
per ton. Leached and rusty quartz with no sulphides present (131F) assayed: Gold,
0.02 oz. per ton; silver, trace.

A number of formational quartz veins outcrop in Oregon Gulch down-stream from
the Foster Ledge upper adit. Samples from two of them (50F and 60F) both assayed:
Gold, 0.01 oz. per ton; silver, nil.

Foster Ledge Gold Mines, Limited, drove an adit on the east side of Oregon Gulch
in the eastern part of Lot 10435 and about 1,300 feet north of the camp. The portal
of the adit is about 25 feet above creek-level, at the base of a bluff in which a number
of quartz veins are exposed. The adit is driven north 65 degrees east for 70 feet, then
south 57 degrees east for 170 feet to the face. The rocks exposed in the adit are thinly
laminated argillaceous quartzite with thin black argillaceous partings and 1- to 4-inch
beds of light-grey hard quartzite. The rocks strike about north 35 degrees west and
dip 20 to 30 degrees to the north-east. A 2- to 5-inch quartz vein striking north 25
degrees east and dipping 80 degrees north-east was crossed at a point 32 feet back
from the face. This narrow vein was followed by a drift for 48 feet to the north-east.
No sulphide mineralization was seen in the quartz and a composite sample (93F) along
its length assayed: Gold, nil; silver, nil. From this vein Lay* obtained a sample of
selected material which assayed: Gold, 0.24 oz. per ton. A fault, strike north and dip
30 degrees east, crossed by the adit 80 feet in from the turn obscures the relationship
of the vein exposed underground with those observed in the bluffs above the portal.

An adit was driven below some surface trenching about 1,200 feet east of Oregon
Gulch and on the western part of Lot 8897. An old trail leads from the Foster Ledge
camp to the adit about 2,000 feet distant. The adit was driven near the northern end
of a prominent northerly striking depression which undoubtedly is the topographic
expression of a large northerly trending fault that was encountered beneath it in the
underground workings. Visible gold is reported to have been present in one of the
veins outcropping above the adit.

The adit was driven north 17 degrees west for 168 feet, then north 36 degrees west
for 83 feet to the face. Ata point 23 feet back from the face a crosscut was driven
north 58 degrees east for 60 feet and then north 70 degrees west for 50 feet.

The rocks exposed underground are interbedded 1- to 6-inch beds of dark argillite,
argillaceous schist and hard grey quartzite striking north 10 to 20 degrees west and
dipping 40 degrees eastward.

A 1- to 4-inch unmineralized quartz vein, strike north 22 degrees east and dip 70
degrees westward, was crossed 70 feet from the portal. At 118 feet from the portal
a drift was driven 20 feet south-west on a 1- to 8-inch quartz vein striking north 38
degrees east and dipping 62 degrees north-westward. At the northern end of this vein
near the crosscut a narrow vein branches from it following a fracture about 5 degrees
east of north. The quartz in the drift has a narrow selvage of ankerite along the walls,
but appears to contain no pyrite mineralization. A fault-zone composed of 1 to 3 feet
of gouge and broken rock is exposed at the face and in a short crosscut about 30 feet
back from the face. The fault strikes about north 10 to 15 degrees west and appears
to dip 60 to 70 degrees east. Several other smaller northerly striking faults exposed
in the adit may be branches from the larger one.

The crosscut to the north-east follows a north-westerly dipping slip which has
faulted some quartz seen on the south-east wall and which does not appear in the north-
westerly trending crosscut.

The veins in all three adits occupy westerly dipping fractures that belong to the
regional north-north-easterly trending system. The veins are narrow and, except very
locally, are sparsely mineralized. It is possible that prospecting along the Last Chance-

* Minister of Mines, B.C., Ann. Rept., 1935, p. C27.
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