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