Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6512
EASTING 570869 NORTHING 6042650 ZONE 14 DATUM NAD83
Date of mapping 08/01/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 279 | 57 |
schistosity | 49 | 69 |

Dikes and Sills:
Rock Number | Type | Width (m) | Strike | Dip
0 | Molson dike | 0.15 | 254 | 73

-strong fracture set, tightly spaced in the Molson, slightly chloritized or epidotized at 157/80
-this appears to be a cooling feature, not tectonic

PETROLOGIC DATA

Rock Number: 1

Rock Type: multi-component schlieric gneiss
Field Description:

-complex mixture of early intrusive phases caught up in camp GRDR; the dominant old phase is the old augen-TNLT that is heavily intruded by young grey PORT-GRDR
-this is extensively intruded by PGMT's
-there appears to be some yung, MASS, grey GRDR with some contradictory age relations indicating PORT younger than MASS.
-the 270 degree fabric is dominant for foliation and layering
-slightly folded by 050 degrees with some penetrative cleavable fabric

Rock Number: 2

Rock Type: diabase
Field Description:

-Greenish black weathering, highly jointed
-Molson of the non-MG variety
-2 - 2 m appart dark dikes, no detectable magnetism
-the second dike show very weak magnetism in the core

Manitoba Geological Survey, 2017