32E04SE0035 - Geology Ontario

13
5.0 MINERALIZATION
5.1 Regional Mineralization
Gold deposits in the Harker-Holloway are associated with the
following geological environment:
1) The Lightning Zone gold deposit occurs along the Destor~
Porcupine Fault Zone at the contact between mafic and ultramafic
volcanics. The host for the zone is a strongly altered and
mineralized variolitic basalt. The zone is generally conformable
to the local stratigraphy, which strikes east-west and dips south
at 65-70 degrees. The zone rakes to the east and tops at 250m
below surface. Mineralization in the Lightning Zone is primarily
pyrite which varies in content from Z-15%, averaging S-8% in
areas with greater than 5 g/t Au. Concentrations of fine K2mm)
pyrite vary in proportion with gold grades. Coarse pyrite which
is barren is found along with trace amounts of chalcopyrite and
arsenopyrite. Alteration is a pale-green to honey colored quartzankerite-sericite
assemblage which occurs intermittently
throughout the mafic volcanics. The Lightning Zone itself is is a
medium to grey in color generally lacks foliation and consists of
a quartz-albite-pyrite assemblage. Original primary features such
as pillow magins, flow contacts, and variolites are commonly
preserved in the Lightning Zone and in the surrounding rocks. The
zone has a strike length of at least 780 metres and is open down
dip and to the east (John Vakeford and lan Atkinson, PDAC-1991).