Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5141
EASTING   574773     NORTHING   6040502     ZONE   14     DATUM   NAD83
Date of mapping    07/15/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
gneissosity 235 82

-small rusty pyrite pyrrhotite bearing gossen from 30 to 100 cm wide in the plane of the foliation

PETROLOGIC DATA

Rock Number: 1

Rock Type: two component schlieric gneiss - intimate mixture of 2 major units

Field Description:

-20% young porphyritic grey granodiorite, abundant schollen inclusions and biotite schlieren

Rock Number: 2

Rock Type: greywacke
Descriptors:
layered
hornblende - garnet bearing

Field Description:

-delicately laminated mafic volcanic derived wacke, has thin amphibolitic horizons with epidote pods

Rock Number: 3

Rock Type: basalt
Descriptors:
massive
hornblende - diopside bearing

Field Description:

-mafic greenish black weathering, looks like a massive flow
-no layering visable

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral hornblende 0.0 0.0 65.0 %


Manitoba Geological Survey, 2017