Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5557
EASTING 571865 NORTHING 6046969 ZONE 14 DATUM NAD83
Date of mapping 07/08/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 279 | 67 |
fault | 190 | 70 | dextral

-persistant set of cm spaced cross fractures

PETROLOGIC DATA

Rock Number: 1

Rock Type: gneiss
Descriptors:
layered
MLNT
Field Description:

-appears to have 2 main components
(1) a moderatly mafic augen GRDR to TNLT (sample a), this has some similarities to the grey porphyry GRDR in the CWB complex
(2) beige leuco-GRDR as at #5553, (sample B), this intrudes the grey GRDR and contain inclusions of it, the picture is further confused by inclusions of volc. , pegmatite and quartz veins. All are smeared out into a layered gneiss by shearing and then the mylonite was annealed

Rock Number: 2

Rock Type: amphibolite
Descriptors:
cataclastic
basaltic composition
Field Description:

-south of mylonite is sheared basaltic rocks that look like they were a mixture of pillowed and massive flows and mafic seds..
-everything is so sheared nothing definite can be said

Manitoba Geological Survey, 2017