Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5015
EASTING 568224
NORTHING 6044484
ZONE 14
DATUM NAD83
Date of mapping 06/19/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
gneissosity | 79 | 50 | |
fault | 45 | 80 | dextral |
-several aplitic sills in foliation along with usual compliment of pegmatitic stringers
PETROLOGIC DATA
Rock Number: 1
-older tonalite is 95% of exposure
-good 1 cm potassium feldspar augen up to 3% of exposure
-texturally indicative of cataclasis of lit-par-lit gneiss
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit |
---|---|---|---|---|---|
augen | potassium feldspar | 0.0 | 0.0 | 3.0 |
Rock Number: 2
-several isolated boudins of younger grey non-porphyritic GRDR
-very little injected lit matierial
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit |
---|---|---|---|---|---|
mafic mineral | 0.0 | 0.0 | 17.0 | mm |
PHOTOS
Grey augen tonalite with old pegmatite cut by dextral offset shear filled with late pegmatite.
Outcrop view showing augen tonalite with 3 generations of pegmatite lit/dikes.
Manitoba Geological Survey, 2017