Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5727
EASTING   581605     NORTHING   6066524     ZONE   14     DATUM   NAD83
Date of mapping    08/03/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 62 90
cataclastic foliation 181 72

-contact between multicomp gneiss and gabbro

PETROLOGIC DATA

Rock Number: 1

Rock Type: multi-component schlieric gneiss
Descriptors:
multicomponent gneiss

Field Description:

-dominantly augen GRDR containing mafic schlieren, mult. pegs, and ampb inclusions

Rock Number: 2

Rock Type: gabbro
Descriptors:
massive
mesocratic

Field Description:

-W side of outcrop is contact containing granite
-contact is poorly exposed, so it is difficult to tell if intrusive contact or a fault contact
-contact zone covered contains rubble
-the GBBR is much finer and more mafic at this loc. which makes me suspect contact is intrusive and gabbro is much younger
-this may be one of the large, old Molson dikes
-sample A taken 75 cm from contact

Minerals of Note
Mineral Abundance (%)
magnetite


Manitoba Geological Survey, 2017