Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5110
EASTING   575381     NORTHING   6041959     ZONE   14     DATUM   NAD83
Date of mapping    07/09/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
gneissosity 41 63

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite

Field Description:

-zone of schollen gneiss approximately 5% of outcrop is highly digested inclusions of amphibolites
-only volcanic and volcaniclastic sediments are observed
-assimilation is almost complete in most inclusions leaving scheiric zones outlining the original form
-layering in the inclusions trends 140 degrees
-compressive deformation is very high, reducing early pegmatites to coarse augen gneiss
-there are several discrete mylonite zones with a feathered anastamosing character

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral 0.0 0.0 12.0 %


Manitoba Geological Survey, 2017