Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5076
EASTING 571673
NORTHING 6039025
ZONE 14
DATUM NAD83
Date of mapping 06/27/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 231 | 81 |
PETROLOGIC DATA
Rock Number: 1
-Anastomosing vein network of augen tonalite as previous station
-Heavily intruded by old sheared pegmatite/aplite/fine-grained granite vein networks.
-produces network with local developement of more extensive pods
Rock Number: 2
-salt and pepper gabbroic rock comprising fine grained plagioclase surronding coarser 2-3 mm equant hornblende
-could possibly be volcanic derived but seems a little too massive and featureless - I would prefer to call it and early gabbro intrusive - probably intruded the volcanics
-sample B is odd - looks like a psammite but has little or no quartz - all hornblende-biotite-plagioclase -probably a fine diorite or leuco-gabbro
-Sample C- finer more mafic gabbro
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit |
---|---|---|---|---|---|
mafic mineral | hornblende | 2.0 | 3.0 | 60.0 | mm |
groundmass grainsize | plagioclase | 0.0 | 1.0 | 40.0 |
Manitoba Geological Survey, 2017