Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5013
EASTING 567388 NORTHING 6044041 ZONE 14 DATUM NAD83
Date of mapping 06/18/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
gneissosity | 52 | 51 |

-2 m dike of crudely zoned pegmatite
-biotite only mica
-rough quartz core with large 30 cm blocky microcline surrounded by quartz-microcline pegmatite,
-garnet occurs as small pockets of 1 to 3 mm euhedral blood red crystals
-abundant large magnetite masses (up to 1 x 2 cm)

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
gneissic
leucocratic
augened
Field Description:

-augen gneiss much as previously
-most pegmatitic matierial restricted to foliation plane

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral |  | 0.0 | 0.0 | 5.0 | mm

Minerals of Note
Mineral | Abundance (%)
biotite
magnetite

Rock Number: 2

Rock Type: granodiorite
Descriptors:
massive
biotite
Field Description:

-schlieric rafts and agmatized bodies of younger grey slightly porphyritic granodiorite

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | biotite | 0.0 | 0.0 | 15.0 | mm
phenocryst | plagioclase | 0.0 | 0.0 |  |

Manitoba Geological Survey, 2017