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mineralized and silicified shear zones. A small quartz vein on the Patricia
group has been followed by an adit for 100 feet. For a length of 30 feet
the vein is up to 6 inches wide and is well mineralized with galena, sphaler-
ite, and pyrite. There are also several other quartz veins on this group.
On the Dwyer group, which adjoins the Patricia, there are several, large,
rusty outcrops in argillites and volcanic rocks. -

Marmot Engineer Syndicate (Locality 109)

References: Annual Report of the Minister of Mines, British Columbia, 1921, 1927,
1928, 1930, and 1931.

The Marmot Engineer Syndicate was organized in 1928 to develop the
Engineer group of claims on the south fork of Marmot river and on which
they drove an adit 230 feet long. A quartz vein, up to 8 feet wide, carries
pyrite and a little chalcopyrite. Several narrow quartz veins in argillite
carry galena, sphalerite, and pyrite.

Marmot Metals Mining Company, Limited (Locality 1038)

References: Annual Report of the Minister of Mines, British Columbia, 1913, 1919,
1922, 1925, 1926, 1927, and 1928; Geol. Surv., Canada, Memoir 159.

The holdings of Marmot Metals Mining Company, Limited, are on the
north side of the south fork of Marmot river about 4 miles above the forks.
The country rock is cherty, argillaceous quartzite and a thick bed of lime-
stone overlain by volcanic rocks and intruded by the Coast Range batholith
and associated dykes and sills of granodiorite.

On the Montana claim, a vein striking northeast and dipping northwest
has been traced on the surface for 300 feet. The vein is less than 1 foot
wide, consists of quartz mineralized with pyrite, sphalerite, galena, and
tetrahedrite and contains high-grade silver ore. It has been developed by
short drifts and a shallow winze driven from a crosscut adit. A total of 21
tons of ore averaging $200 in gold, silver, and lead was shipped from the
winze and drifts in 1913 and 1915. A few hundred feet northeast of the
adit another crosscut adit has been driven to intersect the vein but has not
reached it. Farther up the hill a drift adit 180 feet long follows a different
vein and an associated dyke for 60 feet. The vein is vertical and strikes
northeast. It is 3 feet wide at the portal of the adit but narrows rapidly
and pinches out. It consists of quartz mineralized with pyrite, galena,
sphalerite, and tetrahedrite. A short ore shoot 1 to 2 feet wide is present
at the portal of the adit. An assay of a sample representing one foot of
the width of the ore shoot showed 85 ounces silver a ton, 14 per cent lead,
and 21 per cent zinc.

Recent development work has been concentrated on a different type of
mineral deposit that occurs in a bed of limestone. Two faults offset the
bed into three blocks each several hundred feet long. The faults strike
north 60 degrees east and dip 50 degrees northwestward. The limestone is
sheared parallel to the strike, and where argillaceous matter 1s present shear
planes are quite distinct, but where the limestone is pure the whole has been
changed to marble with no visible shear planes. Rusty, mineralized zones
strike northwestward in the upper limestone block. The width of the zones