Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5057
EASTING 563586 NORTHING 6054835 ZONE 14 DATUM NAD83
Date of mapping 06/24/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 79 | 59 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
light grey
dark grey
megacrystic
coarse grained
Field Description:

-coarse dark grey (light grey weathering) tonalite with plagioclase megacrysts up to 1 cm (average 6 mm) and 2 to 3 mm hornblende crystals
-extensively veined by late beige homogeneous equigranular granodiorite.
-slight trace of magnetite
-late anastomosing pink granite vein network

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
phenocryst | plagioclase | 5.0 | 10.0 |  |
mafic mineral | hornblende | 2.0 | 3.0 |  | mm

Minerals of Note
Mineral | Abundance (%)
biotite
magnetite | -1.0

Manitoba Geological Survey, 2017