47

sulphide in the vein assay 0-2 ounce of gold, 10 ounces silver per ton, and
10 to 20 per cent lead, but are not of commercial importance.

Development in progress during the summer of 1927 consisted of a
drift adit on a 6-foot quartz vein paralleling the south fork of Glacier
creek and outcropping on the east bank of the creek. The vein strikes
north and dips west at 20 to 50 degrees. It consists of drusy quartz min-
eralized with pyrite, galena, and sphalerite. The vein where exposed is
too low in grade to be of commercial importance.

Because of its size the large vein should be developed further. This
development should consist of surface work in search of ore-shoots which
when discovered should be outlined on the surface and underground.

RUSH COLUMBIA MINES, LIMITED

The holdings of the Rush Columbia Mines, Limited, consisting of the
Columbia and the Gem groups, are on the middle fork of Glacier creek
and adjoin the holdings of the L and L Glacier Creek Mines, Limited, on
the west. The country rock is augite porphyrite.

The chief mineral deposit is a vein 1 to 8 feet wide, but in most places
less than 3 feet wide. It lies in a sheared and shattered zone striking
northeast and crossing the middle fork of Glacier creek. The vein has
been traced for 800 feet on the northeast side and for 600 feet on the
southwest side of the creek. Four drift adits have been driven on the vein
on the northeast side of the creek and one on the southwest side. They
are individually 45 to 90 feet long. Open-cuts expose vein matter con-
sisting of quartz, siderite, pyrite, galena, sphalerite, and tetrahedrite. The
vein matter in some of the open-cuts is ore, but no ore-shoots have been -
definitely outlined. The vein matter in the adits is not of commercial
grade. The good ore found locally at the surface is probably not due to
secondary enrichment and, if not, good ore should also exist at some
places underground.

A total of 11 tons of ore was shipped from the vein in 1910 and 1918.
The 1910 shipment consisting of 4 tons contained 0-08 ounce gold, and
375 ounces silver per ton, and 23 per cent lead. The 1913 shipment of
7 tons assayed $114 per ton in silver and lead.

BEN BOLT GROUP

The Ben Bolt group of mineral claims is located at an elevation of
2,500 feet on the south fork of Glacier creek. The country rock is argil-
lite of the Bitter Creek formation striking northwest and dipping gently
southwest near the contact of a body of augite porphyrite. According to
McConnell the Ben Bolt group is at the southern end of the exposed por-
tion of the Portland Canal fissure zone. He states also that the fissure
zone on this group is traceable for 2,000 feet, is 100 feet wide, and con-
sists of silicified and crushed slates holding numerous small stringers and
lenses of quartz. Assays quoted by McConnell from a mineralized shoot
show 10 to 15 per cent lead, 3 to 8 per cent zinc, and 5 ounces of silver
per ton.

1 McConnell, R. G.: Geol. Surv., Canada, Mem. 32, pp. 36, 37 (1913).
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