Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5514
EASTING   571569     NORTHING   6042665     ZONE   14     DATUM   NAD83
Date of mapping    06/30/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 59 72
fault 193 61
joint 252 57
joint 162 89

PETROLOGIC DATA

Rock Number: 1

Rock Type: two component schlieric gneiss - intimate mixture of 2 major units

Field Description:

-well foliated biege weathering gRDR TNLT, intruded by sub-horizontal vein networks and sills of buff leuco-quartz monzonite
-this has been intensivly passively folded by the 059 steep cataclastic foliation producing tight upright folds with a near horizontal axis
-this makes fold profiles observed on outcrop surface appear highly assymetric and disharmonic
-varying outcrop profiles add to the confusion resulting in a near random schlieric fabric
-thin mylonite zones are planar cutting the general cataclastic fabric but are offset on local 060 degree cataclastic planes
-this would seem to indicate the Whiskey Jack Compression zone had an extended period of activity that was probably pulsed


Manitoba Geological Survey, 2017