Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6392
EASTING   569860     NORTHING   6042321     ZONE   14     DATUM   NAD83
Date of mapping    07/31/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 344 53

Linear Structures
Type Plunge Azimuth
boudin axis 58 86

-this outcrop adn north flanked TNLT seem to be a slightly younger outcrop
-north flank was peristerite and called unit 9c by rousell

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
porphyritic
biotite

Field Description:

-light grey white weathering med. grained TNLT --> GRDR
-variable 1 to 2% white MC megacrysts
-GR maybe assoc. with margins or near the margins of the in situ developed pegmatites
-fabric is shown by weak BO-foliation and quartz aggregate alignment
-appears to be the same unit as on north flank in SW Spod. Bay--young 'club' TNLT

Minerals of Note
Mineral Abundance (%)
garnet

Rock Number: 2

Rock Type: amphibolite
Descriptors:
layered
basaltic composition

Field Description:

-mass. black HB-BO ampb with numerous deformed 'lit' of TNLT and old pegmatite
-minor epitotized layering
-probably a deformed basalt
-doesn't look particularly sedimentary


Manitoba Geological Survey, 2017