Cross Lake Project (1983-86)

Geologist    P.G. Lenton     Year    86     STATION    6342
EASTING   570906     NORTHING   6050962     ZONE   14     DATUM   NAD83
Date of mapping    07/10/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 34 74

Linear Structures
Type Plunge Azimuth
ptygmatic axis 67 28

-sudden transition across small bay to quartz rich sands

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
bedded
quartz-biotite

Field Description:

-grey weathering sands-55 to 60 % quartz
-rare GR
-beds are 30 to 50 cm thick
-very little internal lamination, no grading visable
-no cross beds
-all MV knot layers ended
-CLCC layers still present but average 1 to 2 m thick and rare
-which point is one large antiform plunging to NE
-core of fold invaded by 6 m dike of pegmatite

Minerals of Note
Mineral Abundance (%)
garnet

Rock Number: 2

Rock Type: pegmatite

Field Description:

-pegs have also changed into BO>MV, rare TL and GR and large graphic MC
-wall foliated

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

Manitoba Geological Survey, 2017