Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5590
EASTING 580232
NORTHING 6062701
ZONE 14
DATUM NAD83
Date of mapping 07/15/1984
STRUCTURAL DATA
Layering type | Strike | Dip | top Direction |
---|---|---|---|
bedding | 40 | 67 |
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 358 | 70 |
PETROLOGIC DATA
Rock Number: 1
-south half of island mafic volcanics
-pillow unit on south, massive up against felsic
-massive unit basaltic andesite with quartz carbonate veining
-aphyric
-weathers slightly rust brownish black
-flows appear to be around 3 to 4 m thick
Mineral | Abundance (%) |
---|
calcite |
Rock Number: 2
-probable mixture of pillowed and pillow breccia basaltic andesite with 25 to 1000 cm massive flows
-sheared and heavily veined with carbonate that weathered out leaving an irregular pitted surface
Mineral | Abundance (%) |
---|
calcite |
garnet |
Rock Number: 3
-delicate 1 to 2 mm laminations in a siliceous grey to beige weathering siltstone
-may be a reworked rhyolite tuff but is aphyric and purely sedimentary as far as I can tell now
-silts and basalt interlayered at contact in 1 to 2 m units going north into massive siltstone unit
-contact zone marked by extensive gossan development (sample 3B)
Mineral | Abundance (%) |
---|
garnet |
Manitoba Geological Survey, 2017