-98-

may even vr sae i = .
y be toward tho south. North of the valley volcanic rocks

occur above the sediments, cither overturnoal or unconformably.
Lose. RO
ones, R.H.B.: Geol. Surv., Canada, Sum. Rept.,1925, pt.aA, pel24.

eo

en eerste naneceningen conn

Higher up the valley the sediments pinch out between the volcanics.

In Toboggan valley there are greater variations in the
mode of occurrence of the mincral deposits than in other localities.
There are replacement deposits in limestone (Iron Vault), bedding
plane deposits in volcanics (Homestako, etc.), and possibly in
sediments (Rio Grande), deposits along an unconformity (Rio Grande),
and in a small granodiorite mass. Most of thesc have not been
indicated to have prospective valuc. Other, somewhat better
deposits are of the most common type that occur on the mountain.

A number of these on. the Silver Lake group are nearly parallel,
strike toward the peak, and are vertical. On the slope of
Toboggan creek there are others (Iron Vault, etc.) which strike
parallel to the creek and dip south.

There is the same variety of mineral content in the
deposits on Toboggan creek as on the southwest slope of the
mountain and in Glacier gulch and all deposits appear to be
related. High-grade, silver-copper deposits (Silver lake) carry
bornite and native silver, which may be secondary with tetra-
hedrite. The Silver Lake silver-lead deposits indicate
possibilities of developing commercial ore, but they are

unfortunately situated where costs will be high.

Homestake, Mammoth, Iron Mask, Etc. In the base of Toboggan
Creek valley between Schufer lake and the divide there are a
number of small, flat-lying replacement deposits containing
pyrite, sphalerite, and other minerals. They dip south on the
south side and north on the north side and oceur along certain

horizons marked by a change in the formation and rusty rock.