Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5507
EASTING   576575     NORTHING   6043011     ZONE   14     DATUM   NAD83
Date of mapping    06/29/1984

STRUCTURAL DATA

PETROLOGIC DATA

Rock Number: 1

Rock Type: multi-component schlieric gneiss

Field Description:

-very complex series of orthogneisses
-rock was probably a layered mylonite of WJ GRDR , various mafic inclusions, abundant pegmatites, and possibly some Clearwater Bay TNLT
-it has since been recrystallized into a mylonitic gneiss
-the whole outcrop is a large Z-fold, of around .3 m amplitude, plunging around 42 degrees at 051
-the short limb on the fold has failed with << movement and was injected by numerous pegmatites that were subsequently sheared
-this zone of the lake is probably a major compressive zone separating the eastern and western plutonic blocks

-SAMPLE A -is of what was probably WJ GRDR

Minerals of Note
Mineral Abundance (%)
garnet


Manitoba Geological Survey, 2017