Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5062
EASTING 570198 NORTHING 6037887 ZONE 14 DATUM NAD83
Date of mapping 06/25/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 71 | 73 |
fault | 71 | 73 |

Minor Folds
Type | Symmetry | Strike | Dip | Plunge | Azimuth
similar fold | Z | 68 | 66 | 7 | 57

Fault is 5 cm ultramylonite
Fold 10 cm amplitude isoclinal (inter-limb angle 30°)

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
grey - white
dark grey
cataclastic
medium grained
Field Description:

-Cataclastic zone with main rock of medium grained grey white hornblende rich intrusive
-unlike any granodiorite/tonalite encountered so far
-Contains inclusions(?) of finer grained grey to dark grey matierial that may have been sedimentary and/or volcanic
-quartz 20%
- hornblende 15%
- magnetite trace to 1%
-65% feldspar
-epidote occurs along fracture and in mylonites

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral | hornblende | 0.0 | 0.0 | 15.0 | %
mineral abundance | quartz | 0.0 | 0.0 | 20.0 | %
mineral abundance | feldspar | 0.0 | 0.0 | 65.0 | %

Minerals of Note
Mineral | Abundance (%)
epidote
magnetite | 1.0

Manitoba Geological Survey, 2017