Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 86
STATION 6131
EASTING 557849
NORTHING 6024562
ZONE 14
DATUM NAD83
Date of mapping 06/14/1986
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 35 | 67 |
PETROLOGIC DATA
Rock Number: 1
-leucogabbro
-sample taken
-most of island (around 80%) dark grey speckled with black mafic intrusive rock either leucogabbro/diorite
-plag. alters to GR-epidote indicating Ca-plag. comp inclusions of UM-hornblendite and fine grained black diorite (see rock #2)
-gabbro agmatized by buff peg-granite (see rock #3)
-variety of inclusion (probably cognate in gabbro of both fine and coarse grained mafic rock)
Rock Number: 2
-sample taken
-fine grained greenish black weakly-non-foliated homogeneous equigranular field rel. uncertain but appears to be included in gabbro as a single inclusion 1x2 m
Rock Number: 3
-2 samples taken
-leucogranite modal white and biege quartz-rich granite
-grain size: 3 mm equigranular-->GRDR pegmatite
-contains minor MG BO only mafic
Manitoba Geological Survey, 2017