Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6208
EASTING   570358     NORTHING   6047364     ZONE   14     DATUM   NAD83
Date of mapping    06/23/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 283 62

Linear Structures
Type Plunge Azimuth
mineral lineation 38 72

-HB needles on the shear surface

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
cataclastic
basaltic composition

Field Description:

-as previous station, dense black massive amphibolite with rare epidosite masses
-a few narrow sandstone seams
-the foliation plane is invaded by quartz veins and granite

Rock Number: 2

Rock Type: mylonite
Descriptors:
layered
granitic

Field Description:

-5 to 15 cm pink leucocratic mylonites, quite siliceous, probably derived from the late aplite pegmatite pulse


Manitoba Geological Survey, 2017