16

The formation is given its name from the occurrence of a quartz
porphyry intrusive on the Kitchener mineral claim on Proserpine moun-
tain.

Lithology. All the acidic sills and dykes which cut the Cariboo series
have been grouped as the Proserpine intrusives. The examiration of
thin sections from exposures in several parts of the area shows that there
is a variety of petrographical types, but owing to limited exposures and
the alteration of the rocks it was found inadvisable to attempt to classify
them more closely.

Quartz porphyry, felsite, aplite, and quartz latite are prevalent types.
Their outcrops are charactéeristically iron-stained, due to the oxidation of

NW ee
AN iy A Bra,
BU gs

Proserpine
felsite sills

7

Knotted black
Slate, Cariboo
series

\\

Brown aréillite,
Car/ooo series

Waverly Reservoir

: Witrs ean
| , ANN
Geological Survey, Canada Ass \

Figure 1. Proserpine sills in argillites and slates, in the vicinity of W averly reservoir.

disseminated pyrite and siderite. Since they occur to a very large extent
as sills and since the intruded rocks are equally oxidized in most cases,