Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5078
EASTING 572140 NORTHING 6039140 ZONE 14 DATUM NAD83
Date of mapping 06/27/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 228 | 80 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
schlieric or schlieren present
leucocratic
augened
cataclastic
Field Description:

-augen cataclastic gneiss - has both tonalite and granodiorite intensely mixed.

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | biotite | 0.0 | 0.0 | 7.0 | mm
groundmass grainsize |  | 0.0 | 1.0 |  | mm

Rock Number: 2

Rock Type: gabbro
Descriptors:
massive
occurs as a raft
Field Description:

-2 m x 4 m raft of massive mafic rock - gabbro or quartz diorite -can't be sure of quartz content but may be 5 to 10 %

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | hornblende | 0.0 | 0.0 | 35.0 | %
groundmass grainsize |  | 0.5 | 1.0 |  | mm
raft size in metres |  | 2.0 | 4.0 |  | m

Minerals of Note
Mineral | Abundance (%)
quartz | 7.0
hornblende
biotite

Manitoba Geological Survey, 2017