Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6513
EASTING   584530     NORTHING   6065604     ZONE   14     DATUM   NAD83
Date of mapping    08/02/1986

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
inclusion layering 68 81

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 61 82

-this outcrop suitable for bulk sampling of pseudotachylite

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
leucocratic

Field Description:

-highly sheared buff weathering schlieric GRDR
-extensive epiotization of plagioclae
-equigranular with augen of old buff leuco pegmatite lit
-locally mylonitic with thick pseudotachylite seams (see sample 1b)
-Quartz 25 % somewhat simular to WJC but not the same unit

Minerals of Note
Mineral Abundance (%)
epidote

Rock Number: 2

Rock Type: amphibolite
Descriptors:
layered
hornblende-epidote bearing

Field Description:

-5 % inclusion of sheared ampb probably pillow basalt material
-note inclusions lie in zones 1 to 10 m wide following the old 270 degree trend and cross sheared by 060 degrees


Manitoba Geological Survey, 2017