Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5536
EASTING 569559
NORTHING 6054339
ZONE 14
DATUM NAD83
Date of mapping 07/05/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 78 | 84 |
Type | Plunge | Azimuth |
---|---|---|
rodding | 68 | 74 |
PETROLOGIC DATA
Rock Number: 1
-interlayered sequence of feldspathic light grey weathering, grey adn beige on fresh surface, possibly lithic arenites, dark grey siliceous Burntwood style psammite and mafic, probably hornblende bearing
-CLCC rich psammite
-around 50 % of outcrop is intruded material
Mineral | Abundance (%) |
---|
garnet |
Rock Number: 2
-transition from seriate to mica granite to a mix of porphyry GRNT, patched PGMT adn PGMT dikes
-the leucogranite becomes very coarse containing a grain size of 1 cm or more, and starts to acquire isolated blocky microclines and small quartz pods
-this is followed by rapid transition into biotite rich pegmatite containing numerous inclusions of greywacke
-the pegs. at this location were sampled by Anderson
-garnet is abundant in sed. but rare in pegmatite
-muscovite is still a primary phase in the coarse granite but absent in pegmatite
-although there is little physical continuity the dikes frm azimothal networks
-in general, the sequence is 3 to 4 m dikes of coarse 2 mica granite with patched pegs
-margins spreading into an irregular, deformed pegmatite stock work
-there is no trace of molyphysical in any place
Manitoba Geological Survey, 2017