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ENTERPRISE GROUP

The mineral showings on the Enterprise group of mineral claims are
above an elevation of 3,000 feet on the north side of Upper Bear river a
mile or so east of the Red Top group. A vein of chalcopyrite 2 feet wide
was discovered many years ago, and the early development consisting oi
an adit 100 feet long was on this vein. More recent development consist-
ing of open-cuts has been done at a different place, on a mineral zone
exposed at the base of a cliff.

The country rock in the vicinity of the mineral deposits consists of
voleanic fragmentals and lava flows dipping gently northeastward. A small
body of granodiorite, probably a stock, outcrops in the valley below the
Enterprise group. This rock contains disseminated pyrite and chalcopyrite
and may be the source of some of the copper deposits in its vicinity.

The vein on which the early development was done has not been
explored further and apparently has not been traced on the surface for
more than 100 feet. It was narrower than 2 feet in the adit and was below
commercial grade.

; The mineral zone exposed by the recent work has been traced imper-

fectly for 1,000 feet. It consists of light-coloured, probably bleached, vol-
canic rock with disseminated pyrite, chalcopyrite, galena, and sphalerite.
The strike of the zone is roughly northwest. The dip is not known with
certainty, but is probably northeastward at a low angle. The thickness of
the zone is not known. No commercial ore has yet been uncovered. High-
grade silver-bearing float is rather plentiful in the talus below and prob-
ably has come from the mineral zone or from some undiscovered mineral
body higher on the mountain. Further prospecting should be done in the
hope of uncovering better mineralization.

PRINCE JOHN GROUP

The Prince John group owned by the Prince John Mining Company is
on the steep mountain slope west of Bear river opposite the mouth of
Glacier creek. Two crosscut adits have been driven to explore a mineral-
ized zone seen on the surface (See Figure 4).

The country rock is volcanic in origin, but has been sheared to a chlorite
schist.. The planes of schistosity strike north along the hillside and dip
westward into the hill at moderate angles. The schist has been partly
replaced by chalcopyrite and pyrite for a width of 40 feet. The length of
the zone was not ascertained as no open-cuts were seen along the strike.
The ore minerals occur disseminated in small particles through the mineral
zone and also in small, lenticular veinlets and gashes parallelling the
schistosity.

The mineral zone was cut by the upper adit, but was not found on the
lower adit. In the upper adit the zone is parallel to and lies on the foot-
wall side of a large dyke. The dyke is exposed in the lower adit. The
zone may have a flatter dip than the dyke and if so and it continues in
depth, it would pass beyond the face of the lower adit. Ore in mineral
zones of this type, however, is usually in lenses of varying size deposited
along the strike and dip by barren schist. It is possible that the mineral