Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6209
EASTING 570224 NORTHING 6047363 ZONE 14 DATUM NAD83
Date of mapping 06/23/1986

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 289 | 73 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 289 | 73 |

Linear Structures
Type | Plunge | Azimuth
boudin axis | 0 | 0

-pitch is 85 degrees to the east in Fl
-some layers show a granitic lit that appears to be an injection but also has some of the characteristics of mobilisate

PETROLOGIC DATA

Rock Number: 1

Rock Type: basalt
Descriptors:
cataclastic
pillowed
Field Description:

-greenish black chloritic highly deformed basalt
-very dense possibly verging on ultramafic
-exposure has a layered look of greenish-black hornblende rich and greenish-grey epidote rich material
-could be either a pillowed unit or a breccia
-all that remains is a layered cataclastic gneiss
-this structurally overlies the sedimentary rocks
-there are several rusty gossen zones a few cm wide and non-continuous

Minerals of Note
Mineral | Abundance (%)
garnet
chlorite

Rock Number: 2

Rock Type: sandstone
Descriptors:
bedded
feldspathic
Field Description:

-grey laminated feldspar rich sandstone-siltstone-mudstone sequence
-strongly deformed but retaining continuity of layering
-feldspathic sandstone layers are beige to light grey, rich in feldspar and pink garnet
-this is interbedded and possibly graded with grey fine grained more siliceous siltstone and thin black garnetiferous muds
-there are some layers up to 10 cm thick of black garnetiferous mafic siltstone or mudstone (see sample B)

Minerals of Note
Mineral | Abundance (%)
garnet

Manitoba Geological Survey, 2017