Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6189
EASTING   558768     NORTHING   6023364     ZONE   14     DATUM   NAD83
Date of mapping    06/21/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 50 54

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite

Field Description:

-highly deformed, moderatly sheared, coarse grained augen gneiss
-mafics appear to be all BO, but with a clotted texture suggesting retrograded HB
-rock weathers grey white but there has been an extensive HM pinking often associated with an anastomosing of early pink pegmatites
-these dikes cut the foliation in the GRDR but are foliated and deformed later
-this appears to be the standard old GRDR; quartz is low (around 20%)
-it has some of the textural features of WJC, but the quartz content is too low and the feldspar are elongate and blue-grey
-there are also amphibolite and gabbro inclusions

Minerals of Note
Mineral Abundance (%)
magnetite
hematite


Manitoba Geological Survey, 2017