Whitesail Lake Map-Area
Tahtsa Range Occurrence (2)

On the southeast flank of the Tahtsa Range stock there occurs a number
of narrow quartz stringers containing pyrite, chalcopyrite, galena, specular
hematite and some gold. These veins are near the head of the north fork of the
east branch of the creek flowing from the western end of Rhine Ridge. The
fractures and veins occur both in the stock and the Hazelton group rocks
close to the contact. Strike is north 40 degrees east and dip is vertical. The
stringers filling the fractures are only 2 to 3 inches wide and discontinuous.

Swing Peak
Captain Group (5)
References: B.C. Minister of Mines, Ann. Repts.: 1927, pp. 154-155; 1929, p. 184;

1945, pp. 67, 68.

This group of six claims, situated on the northeast slope of Swing Peak,
was previously known as the Swannell group. It is owned by C. McNeill of
Ootsa landing and G. Young of Vancouver.

The main showing is a shear zone that strikes nearly north and dips
steeply to the east. This zone crosses both the lavas and the fine-grained
porphyritic intrusive rock that comprise this part of Swing Peak. In 1929

and 1930, Tahtsa Mining Company drove an adit 383 feet long at an eleva-
tion of 4,985 feet. This adit intersected and explored the shear zone 100
feet below its most prominent surface showing. Little work other than surface
prospecting has been done since.

The rocks on Swing Peak have been cut by a fine-grained porphyritic
diorite that has been fractured and faulted in a north-south direction. Most
of the fractures are narrow but a few reach a width of over 3 feet. They dip
steeply to the east and are commonly marked by gouge. Some of these
fractures are mineralized with galena, sphalerite, pyrite, arsenopyrite, and
tetrahedrite in a gangue of quartz, minor calcite, and wall-rock.

The main mineral showing is on a persistent shear zone that strikes
north and dips 85 degrees to the east. A drift from the crosscut adit was
driven on this zone and all mining was entirely within the porphyritic diorite.
Several minor fractures were intersected in the crosscut; evidence of min-
eralization was encountered 273 feet from the portal. At this point the adit
intersected a fracture containing 6 to 18 inches of gouge and a mineralized

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