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

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 285 | 88 |
schistosity | 48 | 78 |

Dikes and Sills:
Rock Number | Type | Width (m) | Strike | Dip
0 | Molson dike | 0.05 | 73 | 89

Linear Structures
Type | Plunge | Azimuth
boudin axis | 66 | 115

-(Molson) 5 cm low mag.

PETROLOGIC DATA

Rock Number: 1

Rock Type: multi-component schlieric gneiss
Field Description:

-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