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NORTH FORK BASIN GROUP

The North Fork Basin group of mineral claims is in North Fork
basin at an elevation of 4,300 feet on the south side of the glacier on
Kate Ryan creek. Mr. Osborne, field assistant, examined this property
and the following description is taken from his notes.

The country rock consists of argillite of the Bitter Creek formation
striking north to northwest and dipping steeply westward. Two veins
are exposed in the workings, one of which strikes north and dips 46
degrees west, and the other strikes west and dips 60 degrees north. The vein
striking north is exposed in a shaft sunk along the dip of the vein for 110
feet. An adit 80 feet below the shaft collar and 160 feet north has been
driven south and joins the bottom of the shaft. The vein is a narrow
shear zone about 3 feet wide containing quartz mineralized with pyrite,
galena, sphalerite, and tetrahedrite. A fault forms the hanging-wall of
the vein, and because of crushing and brecciation along the fault the vein
is ill-defined. The other vein is exposed in a drift adit 80 feet south of
the shaft. The adit begins on the vein and follows it for 40 feet, at which
point the vein is offset by a fault. The vein is 1 foot wide and consists
of quartz mineralized with pyrite, galena, sphalerite, and tetrahedrite.

A total of 10 tons of ore has been shipped from the northerly striking
vein. Two tons in 1919 yielded 200 ounces silver per ton, 22 per cent
lead, and 22 per cent zinc. Eight tons in 1924 returned 115 ounces silver
per ton, 11 per cent lead, and 13 per cent zinc.

PATRICIA GROUP

The Patricia group of mineral claims is on the south fork of Marmot
river about half-way between the forks and the glacier on the south fork.
The showings are near the contact of the Coast Range batholith, some in
the batholith, some in associated granodiorite dykes, and some in adjacent
argillite. Only two epen-cuts and an adit were seen, but other workings
exist. The open-cuts at an elevation of 3,000 feet expose narrow quartz
gash veins mineralized with pyrite and chalcopyrite. The veins lie on both
sides of a large dyke of granodiorite. An adit 1,600 feet above sea-level
has been driven north-northeast for 112 feet. It is a drift following a
vertical quartz sulphide vein one foot or less in width which pinches out
about 75 feet from the portal. A branch vein joining the vertical vein a
few feet below the floor of the adit is also exposed in the adit for a short
distance. The veins are well mineralized with pyrite, galena, and
sphalerite, and are reported to contain good values in gold.

MARMOT METALS MINING COMPANY, LIMITED

The holdings of the 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 limestone, of the Bitter Creek formation, overlain by volcanic rocks
of the Bear River formation and intruded by the Coast Range batholith
and associated dykes and sills of granodiorite.