Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 86
STATION 6269
EASTING 567454
NORTHING 6048613
ZONE 14
DATUM NAD83
Date of mapping 06/29/1986
STRUCTURAL DATA
-2/3 of outcrop is pegmatite and 1/3 is meta. seds
-but not clear if seds are just inclusion or contact with large pegmatite body
PETROLOGIC DATA
Rock Number: 1
-very large dike mass of coarse peristerite pegmatite especially identical to Peristerite Island
-large mottled pink and grey feldspars up to 1 m in size
-BO is only mafic in rock
-K-spars not graphic
-no zonation to the body and no indication of replacement units
-garnet is abundant in semi-continuous layers late fractures have coatings of green muscovite
Mineral | Abundance (%) |
---|
biotite |
garnet |
tourmaline |
Rock Number: 2
-pebbly sandstone
-45% quartz grey laminated sandstone containing pebbles of low-quartz white aplite leucocratic GRDR TNLT that looks like WJC -probably also contains clasts of Sandstone bedding from 5 cm for grey white weathering feldspar sand to >2m for pebble-cobble bearing, probably lithic sands
Mineral | Abundance (%) |
---|
garnet |
Manitoba Geological Survey, 2017