Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5070
EASTING   571331     NORTHING   6038736     ZONE   14     DATUM   NAD83
Date of mapping    06/25/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 72 81

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
cataclastic
may be lineated

Field Description:

-same major rock type as much of shore
-hornblende looks to be somewhat lineate
-Granitoid lit abundant along shear planes and are extensivly boudinaged
-Minor areas of possible "old tonalite gneiss".

Minerals of Note
Mineral Abundance (%)
hornblende

Rock Number: 2

Rock Type: diorite
Descriptors:
porphyritic
boudin or boudinaged
dike

Field Description:

-Appears to be remnants of the mafic dike sequence encountered previously.
-Appears to be cut by younger coarse grained, slightly megacrystic white granodiorite.
-distinct plagioclase phenocrysts

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral hornblende 0.0 0.0 35.0 mm
groundmass grainsize 1.0 3.0
phenocryst plagioclase 0.0 0.0


Manitoba Geological Survey, 2017