Cross Lake Project (1983-86)

Geologist    P.G. Lenton     Year    83     STATION    5144
EASTING   575187     NORTHING   6040736     ZONE   14     DATUM   NAD83
Date of mapping    07/15/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
gneissosity 55 84

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
cataclastic
hornblende - biotite bearing

Field Description:

-dark grey mafic rock heavily injected with aplite veins and then sheared beyond recognition.
-now is hornblende-biotite gneiss with numerous aplite augen and boudins

Minerals of Note
Mineral Abundance (%)
garnet

Rock Number: 2

Rock Type: aplite
Descriptors:
pegmatitic

Field Description:

-odd textured 3 m. sill of red granitic aplite with scattered blocky microcline and 2 - 10 cm tourmaline
-patches of true pegmatite distributed almost randomly across body

Minerals of Note
Mineral Abundance (%)
garnet
biotite

Manitoba Geological Survey, 2017