Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6350
EASTING 570554 NORTHING 6049869 ZONE 14 DATUM NAD83
Date of mapping 07/12/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 273 | 79 |
schistosity | 52 | 88 |

-SC1 appears to be axial planar on the folding and is cut by SC2
-050 trend is only fabric in PGMT which would seem to indicate the PGMT, postdate the 1st folding event, but are deformed by 050 folding
photos--> massive laminated sands

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
bedded
feldspathic
Field Description:

-slightly unusual exposure of light grey, feldspar rich finely bedded sandstone
-there is some variability in bed form with thin massive 15-30 cm dirty sand, very minor calc-silicate and some MV bearing feldspathic sand
-but, the major unit is a massive layer, several metres thick of uniform grey sand with a vague 1 to 5 m internal bedding
-numerous white feldspathic lenses that look like calc-silicate concretions but are composed of white plag, quartz and minor BO
-these are distributed randomly thru the sand unit, conchordant to bedding and deformed.
-some of the 30 cm bedded sands show cross-bedding

Rock Number: 2

Rock Type: pegmatite
Field Description:

-white, MV-rich dikes and veins
-they intrude parallel to the bedding plane SC and are deformed in the 050 degree direction
-these dikes are unusually quartz rich, and in some places the dikes are just massive white quartz

Minerals of Note
Mineral | Abundance (%)
garnet
muscovite

Manitoba Geological Survey, 2017