Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5189
EASTING 573713
NORTHING 6057750
ZONE 14
DATUM NAD83
Date of mapping 08/07/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 180 | 83 |
PETROLOGIC DATA
Rock Number: 1
-beige weathering quartz-feldspar porphyry
-quartz phenocrysts average 2 mm and are erratically distributed
-muscovite occurs both as fine disseminations and as small oval 1 to 3 mm knots
-foliation has a minor shear component associated with narrow, relatively continuous 2 mm to 3 cm mylonitic zones
-the fractures commonly have epidote - hematite coatings
-randomly orientated quartz veins occur sporadically, occasionally with tourmaline (see sample 1C)
-sample 1A is from the north end of outcrop nearest the seds.
-it is finer grained darker grey and has a pronounced foliation
-sample 1B is from the south end and is typical of the texture for most of the outcrop
Mineral | Abundance (%) |
---|
magnetite |
Manitoba Geological Survey, 2017