Cross Lake Project (1983-86)

Geologist    P.G. Lenton     Year    83     STATION    5008
EASTING   568282     NORTHING   6044947     ZONE   14     DATUM   NAD83
Date of mapping    06/18/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 59 62
cataclastic foliation 40 75

Dikes and Sills:
Rock Number Type Width (m) Strike Dip
0 GRDR 0.25 274 71

-BO-KF-QZ-MV: late dike with minor deformation
-age relationships not as obvious but I'll still say GRDR is younger intrusive into an already gneissic TNLT

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
porphyritic
gneissic

Field Description:

-both units have feldspar phenocrysts but might be best to say megacrytic tonalite

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

Rock Number: 2

Rock Type: granodiorite
Descriptors:
massive
porphyritic

Field Description:

-as before but much less abundant phenocrysts <1 % of rock

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral 0.0 0.0 15.0 mm
phenocryst plagioclase 0.0 0.0 1.0

Manitoba Geological Survey, 2017