Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6035
EASTING 576766 NORTHING 6044838 ZONE 14 DATUM NAD83
Date of mapping 06/14/1985

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 323 | 54 |
cataclastic foliation | 49 | 45 |

Linear Structures
Type | Plunge | Azimuth
mineral lineation | 31 | 65

-3 photos of pseudotachylite
-1 photo of general texture of rock
-pseudotachylites follow general 150 degree trend but are very irregular

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
biotite - chlorite bearing
Field Description:

-coarse homo equi. pink GRDR with "flaser" like augen texture.
-not a porphyry, augen form from discrete aggregates with carved shear planes around them.
-has black BO with chlorite streaks stretched in the fol. plane
-mafics seem to aggregate somewhat which suggests this may originally have been a HB-GRDR
-has a grey white weathering and pink and green streaked fresh surface.
-where outcrop was underwater, feldspars are all stained a matte brick red with white quartz
-no distinction between KF and PG
-this is not the same as pink rock across channel
-no fluorite, different texture and appearance
-probably WJC GRDR

Manitoba Geological Survey, 2017