Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5656
EASTING   570005     NORTHING   6038549     ZONE   14     DATUM   NAD83
Date of mapping    07/25/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 53 78

Dikes and Sills:
Rock Number Type Width (m) Strike Dip
0 Molson dike 0.00 53 78

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
schlieric or schlieren present
leucocratic

Field Description:

-typical pink and grey CWB complex
-minor intrusion of the old grey PORY

Rock Number: 2

Rock Type: norite
Descriptors:
layered
orthopyroxene bearing

Field Description:

-major league size Molson dike
-50 m exposed to south edge of swamp
-unit is still coarse at the end of the outcrop so there is probably at least 20 m not exposed in the swamp
-coarse leuco-norite in the centre shows typical cumulate layering and is quite rich in MG
-there is a minor dike about 10 cm thick south of contact that is non magnetic
-there are numerous minor mylonite shears in the centre of the body
-there is probably some preserved OPX
-SAMPLE B is chill margin

Minerals of Note
Mineral Abundance (%)
magnetite


Manitoba Geological Survey, 2017