Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6051
EASTING 565887 NORTHING 6049531 ZONE 14 DATUM NAD83
Date of mapping 06/15/1985

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 249 | 60 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 249 | 60 |

Dikes and Sills:
Rock Number | Type | Width (m) | Strike | Dip
0 | pegmatite | 0.00 | 301 | 40

Linear Structures
Type | Plunge | Azimuth
boudin axis | 45 | 41

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
layered
quartz-muscovite
Field Description:

-beige and grey weathering sandstones with 45 - 50 % quartz
-MV occurs as small segregations and lens in the foliation
-BD ranges from 15 to 40 cm and is an alteration of MV rich and MV poor layers
-both types show fine internal lamination
-flattening is extreme but is parallel to bedding
-there is around 5 to 10 % injected granitic lee, commonly baudinaged
-metamorphic grade is probably middle amphibolite
-definitly not a migmatite

Rock Number: 2

Rock Type: pegmatite
Field Description:

-2.5 m discordant dike of coarse unzoned 2 feldspar MV-tourmaline-GR PGMT
-large blocky microclines show coarse graphic textures
-massive quartz segregations irregularly shaped and randomly distributed
-tourmalines poikilitic or have a quartz rod in the core
-no dicernable zonation and coarse blocky microclines occur right up to the margins
-weak penetrative fabric that parallel's foliation in the sediment

Manitoba Geological Survey, 2017