Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5032
EASTING 569525 NORTHING 6041999 ZONE 14 DATUM NAD83
Date of mapping 06/22/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
gneissosity | 348 | 59 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
augened
leucocratic
layered
augened
boudinaged
Field Description:

-well layered gneiss with moderate development of microcline augen up to 2 cm that must represent remnants of megacrysts from pegmatitic lit.
-boudinage common

Rock Number: 2

Rock Type: granodiorite
Descriptors:
charcoal grey
massive
20% of the exposure
young phase / unit
Field Description:

-sample of injected lit of GRDR around
- 20 % of exposure is younger charcoal coloured massive intrusive unit
-not porphyritic at this locality

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | biotite | 0.0 | 0.0 | 15.0 | mm
groundmass grainsize |  | 0.0 | 0.6 |  | cm

Minerals of Note
Mineral | Abundance (%)
biotite

Manitoba Geological Survey, 2017