Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5490
EASTING   576458     NORTHING   6041724     ZONE   14     DATUM   NAD83
Date of mapping    06/28/1984

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
metamorphic layering 56 84

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 56 84

-shoreline is all GRDR with rafts of volcanics

PETROLOGIC DATA

Rock Number: 1

Rock Type: basalt
Descriptors:
pillowed

Field Description:

-greenish-blacke weathering, highly deformed but still obvious pillowed unit
-epidosite cores and selvages

Rock Number: 2

Rock Type: greywacke
Descriptors:
psammitic

Field Description:

-grey with white lit
-looks like Burntwood psammite
-no garnet
-heavily sheared
-contact with basalt looks conformable but deformation is too high to be sure of anything

Rock Number: 3

Rock Type: granodiorite
Descriptors:
augened
biotite

Field Description:

-typical of Whiskey Jack granodiorite - 3 to 5% phenocrysts in leucocratic matrix
-shearing augens phenocrysts and causes matrix to go waxey grey


Manitoba Geological Survey, 2017