Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5018
EASTING   567957     NORTHING   6043933     ZONE   14     DATUM   NAD83
Date of mapping    06/19/1983

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
metamorphic layering 84 47

Planar Structures:
Structure type Strike Dip Separation
schistosity 84 47

Linear Structures
Type Plunge Azimuth
mineral lineation 29 123

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
volcanic derived
epidosite
carbonate pods or veins
possible tuff
possible sediment

Field Description:

-highly deformed with epidosite and carbonate? pods containing vugs with euhedral black hornblende and almandine
-much of exposure may be tuff or sed. but can't tell
-Epidosite rich layers are probable flows

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
groundmass grainsize 0.3 0.0

Minerals of Note
Mineral Abundance (%)
garnet
hornblende
epidote

Rock Number: 2

Rock Type: pegmatite
Descriptors:
layered
granitic
aplitic
3 to 4 metres wide

Field Description:

-3 to 4 m dike of aplite and coarse granite with pegmatitic core
samples:
2A- massive blocky microcline from core
2B- muscovite and garnet in aplite material from above core
2C- aplitic matierial and microcline from Upper margin

Minerals of Note
Mineral Abundance (%)
muscovite
garnet
potassium feldspar


Manitoba Geological Survey, 2017