Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5100
EASTING 573701
NORTHING 6040462
ZONE 14
DATUM NAD83
Date of mapping 07/08/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 79 | 69 |
PETROLOGIC DATA
Rock Number: 1
-Typical of the old granodiorite in zone of extreme compression
-reduced to coarse hornblende-bearing augen gneiss
- plagioclase highly sericitized.
-one unusual aspect is that quartz is random in homogeneous distribution with no tendency to segregate in the foliation plane
Mineral | Abundance (%) |
---|
hornblende |
Rock Number: 2
-much more diversified assemblage of rock type.
-layered sedimentary amphibolites are much more common
-breccia zones of massive black hornblendite occur in 2 locations
-massive volcanic ampb is commonly reduced to epidosite
Rock Number: 3
-boudins of younger grey granodiorite completely dismembered in the foliation plane but as usual does not show an extensive history of intrusion and deformation
-phenocrysts granulated and ghostly
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit |
---|---|---|---|---|---|
groundmass grainsize | 0.0 | 5.0 | mm | ||
mafic mineral | biotite | 0.0 | 0.0 | 18.0 | % |
Manitoba Geological Survey, 2017