Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6228
EASTING 560672 NORTHING 6034025 ZONE 14 DATUM NAD83
Date of mapping 06/25/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 34 | 43 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
schlieric or schlieren present
biotite
Field Description:

-same leucocratic mod. foliated intrusive with dark smokey quartz
-occurs on south side of island

Rock Number: 2

Rock Type: granite
Descriptors:
pegmatitic
leucocratic
Field Description:

-central and north part of island
-highly sheared and some places mylonitic and compress coarse red granite and peg.
-abundance of grey mafic TNLT inclusions
-pegmatitic GRNT contains disseminated red garnet and layered garnet aplite
-zone relations unknown
-outcrop is chopped up in shear fabric
-mafic TNLT inclusions are unidentifiable (supracrustal or intrusive)
-few identifiable gabbro-diorite inclusions
-schlieren are numerous particularly between aplite layers
-many inclusions are reduced to ghost schlieren
-this leuco GRNT maybe derived or associated with the leucoGRDR of previous station
-probably part of Minago Group or similar chemistry

Minerals of Note
Mineral | Abundance (%)
garnet
tourmaline
magnetite

Manitoba Geological Survey, 2017