Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5557
EASTING   571865     NORTHING   6046969     ZONE   14     DATUM   NAD83
Date of mapping    07/08/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 279 67
fault 190 70 dextral

-persistant set of cm spaced cross fractures

PETROLOGIC DATA

Rock Number: 1

Rock Type: gneiss
Descriptors:
layered
MLNT

Field Description:

-appears to have 2 main components

(1) a moderatly mafic augen GRDR to TNLT (sample a), this has some similarities to the grey porphyry GRDR in the CWB complex

(2) beige leuco-GRDR as at #5553, (sample B), this intrudes the grey GRDR and contain inclusions of it, the picture is further confused by inclusions of volc. , pegmatite and quartz veins. All are smeared out into a layered gneiss by shearing and then the mylonite was annealed

Rock Number: 2

Rock Type: amphibolite
Descriptors:
cataclastic
basaltic composition

Field Description:

-south of mylonite is sheared basaltic rocks that look like they were a mixture of pillowed and massive flows and mafic seds..
-everything is so sheared nothing definite can be said


Manitoba Geological Survey, 2017