Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5002
EASTING   571972     NORTHING   6046524     ZONE   14     DATUM   NAD83
Date of mapping    06/17/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 296 59

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite

Field Description:

-Transition from sediments with aplite into injection gneiss zone.
-30 m wide then into grey leucocratic schlieric granodiorite with increasing cataclasis to south
-minor zones of intense granulation.
-Relationship to sediments is obviously intrusive with most cataclasis developed post intrusion.

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral biotite 0.0 0.0 10.0 mm

PHOTOS


Transition from greywacke to intensely sheared augen granodiorite. note the intense shearing, isoclinal folding and dextral rotation of augen.


Overview of entire exposure showing the development of schlieren and the partial assimilation of older (?) more leucocratic granodiorite.


Manitoba Geological Survey, 2017