Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5448
EASTING 574531
NORTHING 6059288
ZONE 14
DATUM NAD83
Date of mapping 06/22/1984
STRUCTURAL DATA
Layering type | Strike | Dip | top Direction |
---|---|---|---|
bedding | 57 | 80 |
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 57 | 80 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
0 | Molson dike | 0.10 | 43 | 81 |
0 | Molson dike | 2.00 | 43 | 81 |
Type | Plunge | Azimuth |
---|---|---|
clast elongation | 0 | 0 |
PETROLOGIC DATA
Rock Number: 1
-trough conglomerate and cross bedded sandstone unit across whole island
-many mylonite zones in the section; section is so uniform I can't tell if faults cut out or duplicate sections
-troughs seem to average 3 to 5 m wide and migrate cross section at will
-flattening and (minor folding?) to sever to get any reliable top control
-sample of massive sandstone unit 40 cm thick
Rock Number: 2
-series of 30 to 50 cm fairly parallel sided dikes
-abundant euhedral pale green beryl
-garnet-apatite intergrowths
-looks like traces of opaques, probably are but can't tell for sure
-there is no doubt here what controlled emplacement-all dikes lie between mylonite zones
-they also are sheared with MV (secondary) along shear planes-beryls shattered
-sample-has circled crystal-may be beryl but form looks wrong-X-ray
Mineral | Abundance (%) |
---|
beryl |
apatite |
garnet |
tourmaline |
Manitoba Geological Survey, 2017