Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5400
EASTING 575345 NORTHING 6060065 ZONE 14 DATUM NAD83
Date of mapping 06/11/1984

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 59 | 89 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 59 | 89 |
fault | 47 | 83 | sinistral

Linear Structures
Type | Plunge | Azimuth
clast elongation | 0 | 0

Clast elongation lineation pitches 89 degrees east in the schistocity
-interlayered sequence of lithic wackes and highly deformed conglomerates
-metamorphic grade appears to be almandine amphibolite facies with numerous faser kiesel in the wacke beds

PETROLOGIC DATA

Rock Number: 1

Rock Type: wacke
Descriptors:
lithic
Field Description:

-variable bed thickness from 15 to 130 cm with cross beds common
-rare scour channels
-high quartz content-60 to 65% with numerous grey quartz granules
-calcsilicate layers common with fine amphibolite and 3 to 4mm GR blasts
-calcsilicate as layers or anastomosing patches

Minerals of Note
Mineral | Abundance (%)
garnet
sillimanite
magnetite

Rock Number: 2

Rock Type: conglomerate
Descriptors:
polymictic
Field Description:

-beds up to 2.5 m
-numerous small scours
-clast supported in general but may have some matrix supported beds
-clasts types dominated by sediments but may have significant mafic clast component
-rare bull quartz clasts
-one layer contains several clasts of iron formation
-one clasts of granodiorite appears to have weathering rind
-also present are felsite, granite, tonalite, quartzite and intermediate wacke clasts

Minerals of Note
Mineral | Abundance (%)
garnet
magnetite

Manitoba Geological Survey, 2017