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