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volcanics. Areas where the granitic rocks outerop are below the
zone which there has been entirely eroded away or at least has
been so deeply eroded that probably only the roofs of the veins
have been left. In such nlaces as the Kleanza ard vossibly the
southern Valhalla showings where the tops of veins have been
observed it appears that the top of the zone has been cut into.
Thus it seems probable that the whole depth of the zone is
present over the large area between these showings and the main
workings and beyond wherever the volcanic rock continues. This
Tange area probably represents the roof of the granitic intrusives.
Such a position is generally considered to be most favourabie for

mineralization.

Silver Bow. On this property albite-rich granitic intrusives are
exposed in a cliff about 100 feet high at the tov of which they
are in contact with volcanics. Two mineralized zones have been

a

traced for 300 feet or more in volcanics and are | to 3 feet wide.

In the volcanic recks, the contact, the zones, and the fracturing
and shearing are parallel. One mineralized zone which is said to i
be the best so far found is within a few feet of the contact for a
distance of 300 feet, and continues in the intrusives in both
directions. In a shaft and in an adit, the deposit av shallow
depths becomes much poorer. Mineralization in the central part
of the 300-foot stretch, apparently at the point farthest from
the intrusive, includes much galena, sohalerite, pyrit-, and
chalcopyrite in cuartz and in the sheared and altered rock;

elsewhere there is only pyrite and chalcopyrite and these become

less abundant with increasing depth within intrusives. The best nay
mineralized part is reported to run as much as 2 ounces in gold,

but more commonly about 0.5 ounce. Values die out in the

intrusives and, though the vein is strong and may evyon carry

pyrite, are negligible there.