Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5185
EASTING   573814     NORTHING   6057276     ZONE   14     DATUM   NAD83
Date of mapping    08/05/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 354 87

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Descriptors:
porphyritic
biotite - muscovite bearing

Field Description:

-20 %, 5 to 7 mm, pink feldspar phenocrysts, roughly equant although they are slightly rolled in the foliation
-numerous minor mylonitic zones where closely spaced extension zones where closely spaced extension zones have formed between the shear planes, with intoduction of quartz in the low pressure zones
-muscovite is very fine grained, probably represents around 1 % of rock
-the shear fabric appears to be parallel to the dominant schistocity

Minerals of Note
Mineral Abundance (%)
magnetite


Manitoba Geological Survey, 2017