Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5159
EASTING 573581
NORTHING 6049972
ZONE 14
DATUM NAD83
Date of mapping 07/24/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 68 | 88 |
Type | Symmetry | Strike | Dip | Plunge | Azimuth |
---|---|---|---|---|---|
similar fold | S | 78 | 72 | 54 | 95 |
-well developed axial planar schistocity
-PHOTO 1 clusters of 3 to 5 cm green apatites in pegmatite veins 30 cm thick
-PHOTO 2 biotite books in folded pegmatites
-PHOTO 3 1 cm plagioclase coated muscovite-tourmaline blasts in psammite
-PHOTO 4 general view of fold style
-fold ampliotude/wave length ratio can reach 75/1
PETROLOGIC DATA
Rock Number: 1
-grey silty to fine sandy wacke
-rare 15 cm semi-pelite buds
-minor mylonite in schistocity
Rock Number: 2
-fairly simple with apple green apatite red almandine
-blocky K-feldspar but no muscovite other than traces of late sugary material
Mineral | Abundance (%) |
---|
biotite |
tourmaline |
microcline |
PHOTOS
Cluster of 3-5 cm green to blue-green apatite crystals in 30 cm vein.
Large books of biotite in a folded pegmatite pod.
Centimetre size plagioclase mantled muscovite-tourmaline blasts in psammitic greywacke.
General view of the fold style at this location.
Manitoba Geological Survey, 2017