Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6411
EASTING 0 NORTHING 0 ZONE 14 DATUM NAD83
Date of mapping 07/20/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 46 | 0 |

-small shoreline outcrop 3x10 m
PHOTOS
1,2,4 -contact of mega gabbro and leuco gabbro
3 -mega gabbro

PETROLOGIC DATA

Rock Number: 1

Rock Type: gabbro
Descriptors:
megacrystic
hornblende bearing
Field Description:

-baseball gabbro
-white plag. megacrysts in 3 populations of sizes- around 13 cm, around 6 cm, and around 1 cm in a matrix of coarse (3-6 mm) black hornblende with minor BO alteration
-has a layered nature of baseball gabbro >2m separated by 50 cm of black and white leucogabbro "leopard rock"
-plag. looks to be recrystallized mozaic though carlsbad twins are preserved locally

Manitoba Geological Survey, 2017