Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5008
EASTING 568282 NORTHING 6044947 ZONE 14 DATUM NAD83
Date of mapping 06/18/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 59 | 62 |
cataclastic foliation | 40 | 75 |

Dikes and Sills:
Rock Number | Type | Width (m) | Strike | Dip
0 | GRDR | 0.25 | 274 | 71

-BO-KF-QZ-MV: late dike with minor deformation
-age relationships not as obvious but I'll still say GRDR is younger intrusive into an already gneissic TNLT

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
porphyritic
gneissic
Field Description:

-both units have feldspar phenocrysts but might be best to say megacrytic tonalite

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral |  | 0.0 | 0.0 | 3.0 | mm
phenocryst | plagioclase | 0.0 | 0.0 |  |

Rock Number: 2

Rock Type: granodiorite
Descriptors:
massive
porphyritic
Field Description:

-as before but much less abundant phenocrysts <1 % of rock

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral |  | 0.0 | 0.0 | 15.0 | mm
phenocryst | plagioclase | 0.0 | 0.0 | 1.0 |

Manitoba Geological Survey, 2017