Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5103
EASTING 574207 NORTHING 6041059 ZONE 14 DATUM NAD83
Date of mapping 07/08/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
gneissosity | 79 | 65 |
schistosity | 0 | 0 |

-biotite cross-fabric striking 152 degrees dips steep
-cross fabric seems associated with fracture cleavage
-intense isoclinal folding is prominent all along this shore with a very shallow plunging axes

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite
Field Description:

-quartz shows moderate segregation into foliation plane
-feldspars show distinct rolling
-biotite appears to be the only mafic as small lensoid segregations
-contains numerous inclusions, dominantly of hornblendite which is probably altered pyroxenite of unit 5
-also contains numerous schlierien and whispy inclusions of volcanic amphibolite
- potassic quartz rich pegmatite lying in the foliation plane is extensivly sheared resulting in 1 to 5 cm feldspar augen in a quartz-sericite matrix with minor biotite

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral |  | 0.0 | 0.0 | 12.0 | %

Manitoba Geological Survey, 2017