32E04SE0035 - Geology Ontario

14
The Patten River portion of the
greenstone belt consists of an
assemblage of mafic to felsic metavolcanics, metasediments and
igneous intrusive rocks which are bordered by granitic
batholiths. The rocks strike southeast and
dip steeply northeast
in all parts of the area.
The Patten River property is underlain by felsic metavolcanics on
the northeast part of the property, mafic to intermediate
metavolcanics in the central part of the property and
metasediments in the southern part of the property. The mafic
metavolcanics contain a
narrow band of ironstone. A couple of
diabase dikes are interpretated to cross the property in a north-
northeast direction.
Metamorphism of the flow rocks has produced fine to medium-
grained, amphibole-rich metavolcanics ranging in color
from grey
or pale green to dark greenish black metamorphosed basaltic and
andesitic flows. Most of the flow rocks are
foliated and exhibit
volcanic structures recognized as massive, amygdaloidal,
pillowed, diabasic or gabbroic, and porphyritic types (Lumbers
1963). Felsic metavolcanics consist of flow, tuff, lapilli-tuff,
pyroclastic breccia, and tuff-breccia.