Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6381
EASTING 564977 NORTHING 6048510 ZONE 14 DATUM NAD83
Date of mapping 07/17/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 286 | 69 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
megacrystic
biotite
Field Description:

-much larger range in phenocryst size from <1 cm to 1 cm
-shearing more extensive
-so many mega's are shattered feldspar augen
-rock has a layered appearance that appears to be caused by a nearby intrusion of leuco-GRNT that is now extensivily sheared leaving a pink and grey banded appearance to the rock on a 30cm scale
-the zonation and overgrowth features are still present
-phenocryst size pop. seems to follow a gross layering on the order of several metres
-majority of phenocrysts show a crystallographic alignment in the foliation indicating crystalization in a directed stress field
-there are a few BO schlieren but nothing indicative of inclusions
-the onlly indication of 050 degree tectonism is a strong joint set that is commonly hematized and has sporadic quartz infill
-the same late pegmatites rich in k-spar and BO and Magnetite and poor in quartz lie in foliation plane and show extensive shearing

Manitoba Geological Survey, 2017