Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5067
EASTING   571084     NORTHING   6038204     ZONE   14     DATUM   NAD83
Date of mapping    06/25/1983

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 56 32
fault 241 51

Fault is a 1.5 metre ultramylonite zone

PETROLOGIC DATA

Rock Number: 1

Rock Type: quartz diorite
Descriptors:
cataclastic
inclusions present
mixture of phases present
agmatite

Field Description:

-Resembles the previous hornblende granodiorite but with very little quartz and high mafic content.
-Numerous inclusions including mafic supracrustals and leucocratic granodiorite to tonalite.
-Extreme cataclasis due to fault has agmatized everything in a homogeneous grey cataclasite matrix that looks to be largly derived from quartz diorite

Textural Features
Type Mineral Min. Size Max. Size Abundance (%) Unit
mafic mineral hornblende 0.0 0.0 18.0 mm


Manitoba Geological Survey, 2017