Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6577
EASTING   568777     NORTHING   6042876     ZONE   14     DATUM   NAD83
Date of mapping    08/09/1986

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
metamorphic layering 297 68

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
volcanic derived

Field Description:

-Highly tectonized, re-crystallized, volcanic derived ampb
-the units are completely transposed and tectonized but appear to be volcanic and not Sed.
-GR is sparatic
-there is extensive alteration of HB to BO, EP
-there are a few quartz veins, one sampled appears to have coarse grains of IM (sample B)
-there is local intense HB-BO alteration that appears to be tectonically controlled and is most evident in baudinage

Minerals of Note
Mineral Abundance (%)
garnet
IM

Rock Number: 2

Rock Type: amphibolite
Descriptors:
massive
ultramafic composition

Field Description:

-One baudinage layer around 1 x 2 m of dark green actinolite-mafic rock
-there is no layering in it
-it appears to correspond to the foliation plane but this is unlikely to be a primary volcanic bedding plane
-this probably represents a mafic dike or sill


Manitoba Geological Survey, 2017