Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5003
EASTING   572239     NORTHING   6046560     ZONE   14     DATUM   NAD83
Date of mapping    06/17/1983

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
bedding 293 66

PETROLOGIC DATA

Rock Number: 1

Rock Type: wacke
Descriptors:
layered
mafic
finely laminated
calc-silicate mineral/concretion

Field Description:

-Good para-amphibolite material. Thought at first could be highly stretched basalt as at Pipestone Lake but it is continuous in layering on outcrop scale (>100m)
-Layered at 0.5 to 5 cm with fine internal laminations
-Extensive boudinage of mafic layers and quartz veins
-Rare calcsilicate diopside-plagioclase layers.

Minerals of Note
Mineral Abundance (%)
diopside
plagioclase

Rock Number: 2

Rock Type: granite
Weathered colour: light beige to buff brown
Fresh colour: grey
Descriptors:
aplitic
leucocratic
grey to buff

Field Description:

-1 m. dike of grey (buff weathering) aplitic granite parallel to layering
-possibly not dike but sand layer, but not likely

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral 0.0 0.0 1.0 mm


Manitoba Geological Survey, 2017