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The quartz-albite porphyry dyke is exposed on the road to the
Compressor level at an elevation of 3,475 feet and is intersected in the
Mill level crosscut 160 feet from the portal. It ranges from 20 to 40 feet
in width, strikes northwesterly, and is at least 700 feet long. The rock
is light grey, very fresh, and contains abundant, small phenocrysts of
glassy quartz and grey albite in a finely crystalline groundmass.

Most of the lamprophyre dykes strike either northwest or northeast
and have nearly vertical dips. They range up to 35 feet wide, but most
of them are under 10 feet. The rock is dark grey to black and finely
crystalline. Many of these dykes occur in the mine workings, and are
intersected by the vein-lodes. In several places underground it was observed
that these dykes were offset to the left along these lodes, the displacement
amounting to as much as 10 feet along the Henderson vein-lode.

The albite porphyry dykes are fine-grained, grey rocks carrying small,
albite phenocrysts partly altered to epidote and chlorite. They are not
as numerous as the lamprophyre dykes, but several small ones were noted
in the mine workings. One outcrops at 500 feet south of the portal of the
500 level. It ranges from 6 to 20 feet in width and has been traced easterly
for 500 feet. Another such dyke was observed on the 500 level in the
40-foot crosscut to the north where the Henderson vein-lode is first
intersected. This dyke has a chilled margin in contact with the lamprophyre
dyke and evidently intrudes it. The relative ages of the other dykes are
not known.

The mineral deposits occupy four main fault zones, originally known
as the Ashman, Henderson, Fault Plane, and Dome. These mineralized
fault zones or “ vein-lodes ” strike northeasterly and have dips that vary
from 50 degrees southeast to 70 degrees northwest. They range from a
few inches to 8 feet wide and from 700 to over 3,500 feet long. The
vein-lodes are sliced, sheared, and brecciated zones along which are sulphide
vein fillings and replacement deposits associated with some vein quartz
and carbonate. The ore minerals are galena, sphalerite, tetrahedrite,
ruby silver (pyrargyrite), pyrite, arsenopyrite, and chalcopyrite. The
writer saw no ruby silver in place, but was shown specimens taken from
the Ashman, Henderson, and Fault Plane lodes during stoping operations.
The ore also contains values in gold, but no free gold was seen.

The Henderson vein-lode is marked by stronger slicing and brecciation
than the other vein-lodes and has proved to be the most productive on
the property. It outcrops at intervals along the surface for over 2,000
feet between elevations of 3,550 and 4,200 feet, at which point it is joined
by the Ashman vein-lode. Beyond this point the combined lodes have
been traced up the hill northeasterly in line with the Ashman lode for a
distance of 1,500 feet to an elevation of 4,450 feet. The Henderson lode
has an average strike of about north 65 degrees east and a dip that varies
from 50 degrees southeast to 80 degrees northwest. The Ashman lode has
been traced for about 1,700 feet to the southwest of its junction with the
Henderson. As exposed in surface cuts this lode is not sliced and brecciated
as severely as the Henderson and the vein deposits that occur along it are
relatively small. The Ashman and Henderson vein-lodes come together