Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5544
EASTING   566778     NORTHING   6056254     ZONE   14     DATUM   NAD83
Date of mapping    07/06/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 45 68

Linear Structures
Type Plunge Azimuth
S-intersection 58 94

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
cataclastic
feldspathic

Field Description:

-highly sheared with mylonite zones up to 35 cm wide
-MV blasts smeared on the foliation plane
-thin 10 to 40 cm siliceous quartzite beds
-primary layering was probably at a fairly high angle to the shearing and is completely disrupted
-scattered diopsitic calcsilicate lenses

Minerals of Note
Mineral Abundance (%)
muscovite

Rock Number: 2

Rock Type: granite
Descriptors:
massive
muscovite and tourmaline bearing

Field Description:

-3 or 4 25 cm dikes and several highly sheared veins of rusty white two mica GRNT
-lacks the porphyritic texture typical in the west channel but is essentially the same unit
-TL grow up to 1 cm in length


Manitoba Geological Survey, 2017