Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5182
EASTING   576416     NORTHING   6045722     ZONE   14     DATUM   NAD83
Date of mapping    08/04/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 321 46

PETROLOGIC DATA

Rock Number: 1

Rock Type: volcanic rock
Descriptors:
schistose
mafic

Field Description:

-highly deformed mafic rock-strange textures; both laminated and the epidosite texture usually associated with pillowed units
-samples of snow white feldspar (probably microcline) with large blades of possible ilmenite
-strange boudinaged dike of feldspar with little quartz

Speculation
X-ray confirmed the large blades and seams of oxide are ilmenite. The feldspar appears to be plagioclase. Quartz is present but not common. This pegmatite is "on strike" to the gabbro - anorthosite complex on Pipestone lake. This may be an anorthosite pegmatite with ilmenite seams reflecting the Pipestone chemistry.


Manitoba Geological Survey, 2017