Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5186
EASTING   573624     NORTHING   6057004     ZONE   14     DATUM   NAD83
Date of mapping    08/05/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 236 89
fault 225 87

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Descriptors:
porphyritic
biotite - muscovite bearing

Field Description:

-phenocryst size increasing to 8 to 10 mm
-megacrysts are equant to subtabular microcline, generally Karlsbad twinning
-the zone of faulting is accompanied by epitotization and chlorotization for around 1.5 m
-in general the rock weathers a darker beige with a blue-grey fresh surface
-there are numerous 5 mm mylonitic zones paralleling the major fault

Minerals of Note
Mineral Abundance (%)
magnetite
epidote


Manitoba Geological Survey, 2017