Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5025
EASTING 568376
NORTHING 6042736
ZONE 14
DATUM NAD83
Date of mapping 06/20/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 312 | 62 | |
fault | 281 | 80 |
-photos of incredable mylonite and augen mylonite features
-mylonite layered
PETROLOGIC DATA
Rock Number: 1
-heavily sheared - both tonalite and granodiorite present but so intimately associated because of heavy cataclasis that you can't really separate phases.
-There appears to be some warping and distortion of the mylonite by later penetrative shear
PHOTOS
Brecciation of old sheared multi-component gneiss by younger small scale cross-cutting mylonite/ultramylonite seams.
Detail of late crosscutting mylonite.(card resting on late surface)
Late granitic lit occupying dextral fractures.
Large augen formed in old leucotonalite by progressive boudinage and rotation of early granite/pegmatite veins.
Manitoba Geological Survey, 2017