Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5021
EASTING   567955     NORTHING   6043437     ZONE   14     DATUM   NAD83
Date of mapping    06/19/1983

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
metamorphic layering 11 66

Planar Structures:
Structure type Strike Dip Separation
schistosity 11 66

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
volcanic derived
epidosite
possibly pillowed

Field Description:

-looks like extrusive pillowed basalt
-lots of epidote-hornblende pods

Minerals of Note
Mineral Abundance (%)
epidote
garnet
hornblende

Rock Number: 2

Rock Type: gabbro
Descriptors:
massive
mesocratic
greater than 4 metres wide
deformed
quartz feldspar veins present
east of rock 1

Field Description:

-3 to 4 m exposed to waterline east of amphibolite and pegmatite
-deformed with injected veinlets of quartz-feldspar; not Molson

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral hornblende 0.0 0.0 55.0 mm

Rock Number: 3

Rock Type: pegmatite
Descriptors:
2 metres wide
graphic felspars present

Field Description:

- 2 m. dike
- graphic microcline (3-20 cm)
- tourmalines
-1 x 6 cm biotite books
- cut by westerly fracture cleavage

Minerals of Note
Mineral Abundance (%)
tourmaline
biotite
garnet


Manitoba Geological Survey, 2017