Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6319
EASTING   566803     NORTHING   6048018     ZONE   14     DATUM   NAD83
Date of mapping    07/09/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 291 28

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
schlieric or schlieren present
leucocratic

Field Description:

-White weathering, medium grained, quartz rich, peristerite GRDR
-very vague BO schlieren and numerous white pegmatitic lee give the outcrop a layered appearance
-has tiny red disseminated, HB patches 1 cm across, probably part of the peristerite complex, but this is not a unit I have encountered before
-a white quartz rich PGMT contain Gr
-BO is the only mafic
-in general, this rock is whiter and more leucocratic than any other unit in this complex
-it has a very slight tendancy towards porphyritic
-slight dissemination of white phenocrysts up to 6 mm


Manitoba Geological Survey, 2017