Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    85     STATION    6003
EASTING   576310     NORTHING   6045516     ZONE   14     DATUM   NAD83
Date of mapping    06/07/1985

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 303 62

-one feature that remains inconsistant with the apparent age relation is that the fabric is generally more obvious in younger GRNT than grey porphyry
-this may just be reflection of coarser grain size and uniform grain size distribution

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Descriptors:
augened
biotite-microcline bearing

Field Description:

-mottled pink and white younger granite
-30 % quartz variable 3 to 5 % microcline phenocrysts
-MG significantly higher than grey porphyry
-the only real difference between grey porphyry and this unit is a more uniform grain size distribution, coarser groundmass, higher quartz, and MG and fewer phenocrysts.

Minerals of Note
Mineral Abundance (%)
magnetite


Manitoba Geological Survey, 2017