Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5186
EASTING 573624 NORTHING 6057004 ZONE 14 DATUM NAD83
Date of mapping 08/05/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 236 | 89 |
fault | 225 | 87 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Descriptors:
porphyritic
biotite - muscovite bearing
Field Description:

-phenocryst size increasing to 8 to 10 mm
-megacrysts are equant to subtabular microcline, generally Karlsbad twinning
-the zone of faulting is accompanied by epitotization and chlorotization for around 1.5 m
-in general the rock weathers a darker beige with a blue-grey fresh surface
-there are numerous 5 mm mylonitic zones paralleling the major fault

Minerals of Note
Mineral | Abundance (%)
magnetite
epidote

Manitoba Geological Survey, 2017