Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5104
EASTING   574391     NORTHING   6041282     ZONE   14     DATUM   NAD83
Date of mapping    07/08/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
gneissosity 47 64

Dikes and Sills:
Rock Number Type Width (m) Strike Dip
2 Molson dike 0.00 307 86

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite

Field Description:

-extremely complex, highly deformed agmatized complex gneissic granodiorite surrounding numerous inclusions of the old unit 5 gabbro complex

Rock Number: 2

Rock Type: gabbro

Field Description:

-continuation of the major Molson dike
-hangingwall contact fairly defined
-Footwall contact not exposed
-Estimated thickness 65 m. The dike appears to be narrowing sharply
-only central regions have cumulate layering
-there is no leuco-gabbro phase.
-chill margins on the hanging wall is aphanitic for 60 cm
-there is a 40 cm converging dike exposed 2 m above the main contact
-sample of hanging wall chill right at contact


Manitoba Geological Survey, 2017