Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6126
EASTING 559199 NORTHING 6025710 ZONE 14 DATUM NAD83
Date of mapping 06/14/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 305 | 54 |
schistosity | 49 | 67 |

Dikes and Sills:
Rock Number | Type | Width (m) | Strike | Dip
0 | vein | 0.00 | 46 | 87

-monomineralic blue grey quartz vein
-PHOTOS 1,2,3 --> pegmatite (general)

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
seriate porphyritic
biotite
Field Description:

-seriate GBBR
-slightly schlieric with inclusions of the old MCSG
-quartz conten 30%, decrease in megacryst content
-distribution of megacrysts is patchy with a range of 5 to 20%
-sample taken

Rock Number: 2

Rock Type: pegmatite
Descriptors:
pegmatitic
Field Description:

-pegmatite
-sample taken
-swarm of late pink peg. showing little penetrative fabric slightly anastomosing with a 235 trend and variable mod. dips contp-->distinctly perialuminous
-discontinous zonation is present but poorly developed quartz content low; aggregate content 15% with local development of central pods, microcline, pink with grey modelling
-muscovite>biotite
-garnet abundant as accessory as is euhedral and skeletal tourmaline
-dike margins--> medium grained-aplitic with garnet laminations and aug. 5 cm
-internal zones packed microcline and minor quartz biotite muscovite
-core zone is large euhedral MC+QZ+tourmaline-musc.
-mabe advanced minago series(?)

Manitoba Geological Survey, 2017