Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5414
EASTING 576895 NORTHING 6060474 ZONE 14 DATUM NAD83
Date of mapping 06/16/1984

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 103 | 88 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 103 | 88 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: conglomerate
Field Description:

-section from N to S (probably largely up section but can't tell for sure)
-north side is same chaotic boulder conglomerates with garnet that occurs on island to NE
-this shows no bedding features at all
-this changes rather abruptly into a more sorted and graded conglomerate with a dirtier matrix
-garnet increases in size and abundance and anthophylite appears
-moving up section (ie south) it becomes progressivly dirtier and becomes staurolite bearing
-clast size is more sorted and pebble bed/cobble -boulder beds alternate
-clasts are dominantly sedimentary with minor mafic volcanics and intrusive
-siltstone dominant
-SAMPLES 1 and 6 anthophylite, 2 garnet and staurolite, 3 staurolite and garnet and in pelitic matrix conglomerate

Minerals of Note
Mineral | Abundance (%)
garnet
staurolite
anthophyllite

Rock Number: 2

Rock Type: pegmatite
Field Description:

-typical Beryl Island dike with yellow green beryl, pale orange garnet, some tourmaline, primary muscovite, quartz, feldspar, triphylite and lots of coarse platey columbite-tantalites

Manitoba Geological Survey, 2017