Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 86
STATION 6371
EASTING 568318
NORTHING 6041280
ZONE 14
DATUM NAD83
Date of mapping 07/14/1986
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 285 | 88 | |
schistosity | 48 | 78 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
0 | Molson dike | 0.05 | 73 | 89 |
Type | Plunge | Azimuth |
---|---|---|
boudin axis | 66 | 115 |
-(Molson) 5 cm low mag.
PETROLOGIC DATA
Rock Number: 1
-typical CWB multi outcrop intrusive complex
-most abundant rock is a mottled pink and grey seriate GRDR--CI=3
-phenocrysts are grey-white microcline from 2 to 15 mm
-looks like the slightly seriate CWB TNLT in SE Spod. Bay
-unit is well-foliated with early 270 degrees fabric disharmonically folded by younger 050 degrees
-seriate GRDR intruded by the F-grid younger grey GRDR porphyry--CI=7
-grain size=5mm
-phenocrysts white plag. up to 6mm
-both of these units are intruded by me. grid aplitic pink granite --CI<1
-all 3 are sheared at 270 degrees although Granite < the GRDR
-outcrop is cut by coarse pink quartz rich MC pegmatites with large euhedral magnetites
-these cut the pink granite and 270 degree fabric but are folded 050 degrees
-massive quartz veins cut peg. and are fractured at 050
-the last intrusive outcrop is the Molson dike which show no evidence of any fabric
-seriate GRDR contains inclusions of coarse Gabbroic amphibole -both GRDR unis are highly schlieric
SAMPLE A-->seriate GRDR
SAMPLE B-->old aplitic Granite
Manitoba Geological Survey, 2017