Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5092
EASTING   572828     NORTHING   6039755     ZONE   14     DATUM   NAD83
Date of mapping    07/07/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
fault 158 73

Fault is a 5 mm mylonite

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
schlieric or schlieren present
biotite-plagioclase bearing

Field Description:

-looks like two component schlieric gneiss but with augen granodiorite as base component
-must have intruded another compressive zone as every thing is highly flatted and stretched into gneissocity with abundant k-feldspar augens from old pegmatite

Rock Number: 2

Rock Type: granodiorite
Descriptors:
porphyritic
biotite

Field Description:

-numerous intruded(?) layers of younger grey granodiorite
-appears to have both varieties; the porphytitic and the massive mesocratic granodiorite
-see samples


Manitoba Geological Survey, 2017