Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5474
EASTING 577453
NORTHING 6061143
ZONE 14
DATUM NAD83
Date of mapping 06/27/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 82 | 85 |
PETROLOGIC DATA
Rock Number: 1
-very unusual station--may be a more extensive regolith than encountered previously
-essentially consists of a series of magnesian silty sediments with honey amphibole, dark brilliant green ultramafic layers with fibrous green amphibole
-vuggy calcareous silts with radial patches of brown fibrous amphibole and garnetiferous amphibolitic conglomerate with cobbles of unit 1 tonalite
-whole outcrop has a rusty gossan appearance
SAMPLE
1 -conglomerate
2 -silty amphibole-carbonate rock
3 -ultramafic sediment
4 -silty amphibolite with pale green amphibole
5 -contact between ultramafic and sandy unit
-looks to be a zone of altered mafic seds at the regolith contact-CGLM to north, mafic sediments to south
PHOTOS
1&2 -ultramafic sed. against silty calcareous sed.
3 -conglomerate with TNLT cobbles
4 -radial amphibole fibres in silty sed.
Manitoba Geological Survey, 2017