36

St. Elmo Claim (25)
Reference: Ann. Rept., Minister of Mines, B.C., 1929, p. 151.

The St. Elmo claim, about 4 miles northeast of Usk, is reached from
the trail along the east side of the Skeena by a short, steep trail that
branches east about 14 miles north of Chimdemash creek. C2

The claim is underlain by thick beds of very fine-grained tuff striking
north 70 degrees east and dipping 40 degrees south. On the east bank of
a small stream at elevation 1,000 feet a 25-foot adit was driven across a
sheared and altered zone in the tuff. The altered rock contains a sparse
impregnation of bornite and a little hematite, but not in economic amounts.
A typical sample assayed: gold, none; silver, 0-36 ounce a ton; copper, 0-04
per cent.

Bradle Bane Group (26)

The Bradle Bane group of eight claims was staked in 1935 by A. A.
MacDonald of Usk, and Reid L. Maclennan and J. Preece of Prince
Rupert. The claims are about one mile east of Skeena river and 5 miles
northeast of Usk. A fair pack-horse trail turns off from Skeena river
a mile below the mouth of St. Croix creek and leads to the Bradle Bane
camp at 2,600 feet elevation.

The claims are underlain by very fine-grained, grey tuffs which strike
east and dip 50 degrees south. Intrusive rocks, if present, are hidden by
an abundant drift cover.

At elevation 2,850 feet the tuffs are cut by a fault that strikes south
up the steep mountain slope in the bed of a small stream. A subsidiary
fault which branches northwest encloses with the main fault a brecciated
and altered zone of pinkish white tuff mineralized along minute fractures
with fine veinlets of pyrite with a little galena and molybdenite. The
mineralized zone is about 15 feet wide at the base of a 30-foot cliff where
trenching has been done and here the tuff contains 2 per cent of sulphides,
chiefly pyrite. Farther north as the zone widens on the west side of the
creek the mineralization progressively weakens. A typical sample of the
mineralized tuff selected from the dumps assayed: gold, none; silver, 0-46
ounce a ton; lead, 0-72 per cent; molybdenum, 0-11 per cent. A 5-foot
channel sample taken across the face of the rock cut at the foot of the
cliff assayed: gold, none; silver, 0-02 ounce a ton; lead, none.

Approximately 150 feet farther north and 50 feet lower a parallel,
vertical fault 12 feet east of the main fault has been exposed by stripping
on the east bank of the creek. The tuff is sheared and altered for 6 feet
on either side of this fault and contains small amounts of pyrite, galena,
and sphalerite, in about equal proportions. The extent of mineralization
along the strike of the sheared zone is unknown, as it is drift covered.

Algoma Group (27)
Reference: Ann, Rept., Minister of Mines, B.C., 1931, p. 71,

The Algoma claims are on the mountain on the north side of St. Croix
creek, about 2 miles east of Pitman flag station. A steep branch trail
leaves the St. Croix trail 2 miles east of Skeena river and leads to an old