Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 85
STATION 6061
EASTING 570107
NORTHING 6047831
ZONE 14
DATUM NAD83
Date of mapping 06/19/1985
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 269 | 78 |
PETROLOGIC DATA
Rock Number: 1
-grayish brown weathering with dark grey surface, strong schistocity
-contains inclusions of massive ampb
-unit ut by rock type 2, then cut by rock type 3 at which time an anatomozing vein network of feldspathic, HB-epidote seams formed and then was cut by rock type 4
Mineral | Abundance (%) |
---|
hornblende |
Rock Number: 2
-dikes up to 1 m or more with an associated vein swarm in rock type 1.
-this rock is sheared and shows the same HB-epidote alteration as the earlier unit
Rock Number: 3
-foliated, veined, old gabbroic intrusive that contains inclusions of TNLT gneiss
-this is cut by fine feldspathic stringers and quartz veins but does not show same HB-epidote alteration as earlier units
-gabbro may have caused the alteration in the TNLT's
Rock Number: 4
-60 cm dike of old mafic intrusion
-strong fabric and deformed margins
-this unit crosses TNLT gneiss and truncates veins of Rock type 2 and HB-epidote alteration seams
-fine grained and was probably pyroxene bearing
-not a Molson
PHOTOS
1 diabase cutting TNLT Gneiss
2 TNLT gneiss with leuc TNLT veins and alteration veins cut by diabase
3 Gabbro ampb with inclusions of old TNLT
4 General shot of Gabbro ampb
5 ampb inclusions in TNLT gneiss
6 alteration veins cutting and offsetting leuco TNLT
7 leuco TNLT cutting TNLT gneiss
Manitoba Geological Survey, 2017