=99=

To the west with the riso in the valley they converge toward its

a : : :
centre and appear to represent on anticlinal structure.

1b : : :
Silver Creek.= (Schufer property, Iron Vault claim). West of the

ak A
— Jones, R.H.B.: Geol. Surv., Canada, Sun. Rept. 1925, p. 13583

4nn. Rept. Minister of Mines, B.C., 1926, pe 130. Map.
Se a RS Se ee ee ee ee ee Se

cirque on the spur that rises south of the divide at the head of
Toboggan creek there are three distinct types of mineralization:
pyrrhotite-sphalerite replacement deposits in limestone, galena-
silver veins and replacement deposits in fracture or shear zones
that cut volcanic rocks and limestone, and arsenopyrite-sphalerite-
chalcopyrite mineralization in shear zones in granodiorite. The
very steep northerly slope of the main valley and at right angles
to this the very steep western wall of the cirque afford a good
opportunity for study of the nature of the deposits at depth.
The bedrock is extensively exposed except toward the west where
the spur is cut away somewhat and covered with much talus.

The pyrrhotite-sphalerite type is confined largely if
not entirely to limestone. It occurs at an elevation of about

5,500 feet in smell lenses widely scattered in one belt extend- ie

1 am. Rept. Minister of Mines, B.C., 1926, p. 150.

ing from the wall of the cirque 1,000 feet northwest and in two
smaller pockets 125 feet and 225 feet higher at the edge of the
cirque. On the wall of the cirque the main belt of limestone,
15 feet thick, pinches out downward in about 100 feet between
two walls of volcanic rocks. The mineralized zone, 15 feet wide
at the top, pinches out downward in about 15 feet. in an adit
that struck the zone farther west than this showing it was found

to be narrow; the pinching appears to continue westward. The

tivo higher pockets are in shallow shells of limestone overlying

volcanics. Assays show: gold, 0.14 ounce, silver 1.5 ounces a