Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5405
EASTING 575838 NORTHING 6060479 ZONE 14 DATUM NAD83
Date of mapping 06/13/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 239 | 81 |
fault | 47 | 84 |

-isoclinal folded quartz veins transect the foliation in a N/S direction and post date the mylonites

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
schistose
lithic
Field Description:

-same lithic wacke with rare pebbly beds
-shearing completly obliterated all sense of bedding direction
-sillimanite is heavily alltered to muscovite
-numerous pseudotachylites, often spaced cm apart
-faults are feathered and arcuate, quartz conten has decrease to 35%
-lithics are indistinguishable from matrix
-quartz veins invasive into foliation plane contain abundant hornblende and chlorite, probably by iron leaching of the sands

Minerals of Note
Mineral | Abundance (%)
muscovite
sillimanite

Manitoba Geological Survey, 2017