Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6360
EASTING   559721     NORTHING   6043900     ZONE   14     DATUM   NAD83
Date of mapping    07/13/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 78 74
fault 212 67 dextral

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
augened
leucocratic

Field Description:

-light grey weathering with grey-white fresh surface
-sheared megacrystic TNLT
-possible 9d but looks a little whit
-megas are augened white feldspar with BO inclusions and range up to 4 cm
-ampb inclusions decrease to north

Rock Number: 2

Rock Type: amphibolite
Descriptors:
mixture of phases present

Field Description:

-40% of exposure on south side of outcrop decreasing to 5 % on north is inclusions of various size and composition including mafic volcanics, amphibolitic sediments and coarse hornblende metagabbro
-one inclusion of ultramafic black hornblende rock that may have been a pyroxenite


Manitoba Geological Survey, 2017