Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5460
EASTING 574512
NORTHING 6060515
ZONE 14
DATUM NAD83
Date of mapping 06/24/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 175 | 89 |
Type | Plunge | Azimuth |
---|---|---|
clast elongation | 0 | 0 |
-F2 is a passive crenulation
-maximum stretching along F1, F2 intersection
PETROLOGIC DATA
Rock Number: 1
-highly stretched and crenulated, massive unsorted ungraded
-clast dominantly sedimentary with siltstone and feldspathic greywacke the most common type
-contains 3 to 5% white tonalite cobbles
-less than 1% of clasts are mafic
-these units do not appear in the Beryl Island section
-there may be thin sands horizons
Mineral | Abundance (%) |
---|
garnet |
Rock Number: 2
-Microcline Oligoclase pegmatite with no definable zonation
-biotite is the principle phyllosilicate
-muscovite appears to be secondary on shears
-tourmaline is abundant occurring as clusters of large shattered crystals of up to 10x25 cm
-there is no detectable beryl
-intrusion is generally parallel to F1 but is sheared and folded about the F2 axial planar schistosity
-this seems to correspond to the most north easterly occurance of Middle Group
Mineral | Abundance (%) |
---|
garnet |
tourmaline |
biotite |
Manitoba Geological Survey, 2017