97

no gold, and no silver. Messrs. F. and W. Dillon of McKinnon post office
own claims situated nearby, on which it is said are veins of quartz containing
pyrite and chalcopyrite and carrying values in gold, silver, and copper.
_@At the Big Slide mine’, situated on the banks of the Fraser at the
mouth of Kelly creek, are quartz veins carrying pyrite and chalcopyrite.

A ten-stamp mill with chlorinating furnace was erected here in 1886 and .

considerable underground work was done. A sample taken by Dawson
in 1887 of the concentrates, assayed 0-408 ounce of gold and 0-933 ounce
of silver to the ton. The mine, which was in operation for only a few
months, is situated at the bottom of the canyon and is most difficult of
access. :

Two of the occurrences described, and probably the McKinnon claims,
lie in the neighbourhood of granite intrusives that crop out In narrow
strips parallel to the strike of the formations in Fraser canyon.

The gold values found should encourage prospecting in the Cache
Creek rocks near this contact. The carbonaceous matter near Elevenmile
ereek looks like graphite, but tests’show that it is not.

TIMOTHY MOUNTAIN.

On the flat summit of Timothy Mountain ridge, about 2 miles by trail
northwest of the molybdenite claims, values in gold, silver, copper, lead,
and zine occur in sheared country rock of quartz diorite (Figure 2, locality
16, and Figure 13, localities 1 and 2). The ore minerals are chalcopyrite,
bornite, pyrite, galena, and sphalerite lying in a gangue of quartz. The
country rock is quartz diorite of the same character as that on the molyb-
denite claims and near the ores are occurrences of dark green augite andesite
dykes and light-coloured pegmatites. Tourmaline and epidote occur with
and near the pegmatites.

Ores of the same general character and occurrence were found along
the northeastern rim of the ridge and in the gulch below. On the summit
are a number of parallel and branching veins about 6 inches thick, striking
north 42 degrees east, dipping steeply eastward, some of them apparently
running together in depth. They have been opened up ina belt of sheared
quartz diorite at intervals for a horizontal distance of about 700 feet. The
width of this sheared zone is from 25 to 30 feet. A few hundred feet south
of the main outcrops, openings showing galena and pyrite have been made
in a shear zone crossing the prolongation of the vein zone described, with a
general trend of east 80 degrees south. The ore occurs as fissure filling
in the veins and disseminated through broken quartz diorite. On the
northeast rim of the ridge are a number of shear zones from 5 to 50 feet
wide, striking down the slope.. Bornite and chalcopyrite occur disseminated
in dark green dykes in these zones or are found in connexion with quartz
and altered quartz diorite.

The copper claims on the summit are the Intermountain, owned by
W. J. Ryan, and the Highland Mary. On the Intermountain there are a
shaft 25 feet deep, a short tunnel, and a great deal of trenching both along
and across the veins. Numerous prospect holes have been dug in the
occurrences to the east. The values of assays from different localities
have been given by Mr. Ryan as follows: (1) picked sample of galena ore

1Dawson, G. M., ‘‘Report on the Kamloops map-sheet, British Columbia.” Geol. Surv., Can., Ann. Rept.
vol. VII, 1894 ,pp. 339-340B.

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