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

Rock Type: pegmatite
Field Description:

-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

Minerals of Note
Mineral | Abundance (%)
biotite
garnet
tourmaline

Rock Number: 2

Rock Type: sandstone
Field Description:

-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

Minerals of Note
Mineral | Abundance (%)
garnet

Manitoba Geological Survey, 2017