Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6243
EASTING   558906     NORTHING   6035831     ZONE   14     DATUM   NAD83
Date of mapping    06/26/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 47 63

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
seriate porphyritic
biotite

Field Description:

-much more sheared and intruded by pegmatites and blue quartz veins
-phenocryst content down to 3 to 4%

Rock Number: 2

Rock Type: diorite
Descriptors:
gneiss / gneissic
hornblende - biotite bearing

Field Description:

-salt and pepper meso-diorite
-black HB altering to BO
-occurs as series of very large rafts
-highly contorted and injected with old GRDR, pegmatite, apalite and quartz veins
-no indication of a primary layering or compostitional variation
-rafts generally aligned in the foliation plane


Manitoba Geological Survey, 2017