Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5040
EASTING 570825 NORTHING 6041801 ZONE 14 DATUM NAD83
Date of mapping 06/23/1983

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 346 | 50 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 346 | 50 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
finely laminated
mafic
agmatized
salt and pepper texture
gabbroic
Field Description:

-finely laminated mafic gneiss with abundant boudinaged injection sills
-very large rafts up to 100 m or more in granitic rock
-much of amphibolite is well layered sedimentary amphibolite with
mafic and leucocratic layers that are continuous for extensive distances on outcrop.
-other layers are more massive salt & pepper amphibolite that may have been extrusive

Rock Number: 2

Rock Type: two component schlieric gneiss - intimate mixture of 2 major units
Descriptors:
leucocratic
Field Description:

-mainly old tonalite with wisps of biotite and rare vague inclusions of granodiorite

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | biotite | 0.0 | 0.0 |  | mm

Manitoba Geological Survey, 2017