Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6511
EASTING 570682 NORTHING 6042784 ZONE 14 DATUM NAD83
Date of mapping 08/01/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 67 | 82 |
joint | 238 | 66 |
joint | 164 | 82 |

-2JT-sets are strong, tightly spaced, intersecting
-locally almost a shear fabric with spacing of 1 cm or less
-they occur through out the outcrop, but become concentrated locally in zones up to 50 cm wide and intersect in diamond shaped zones of near granulation

PETROLOGIC DATA

Rock Number: 1

Rock Type: multi-component schlieric gneiss
Field Description:

-Fairly typical complex mixture of old augen TNLT, young grey GRDR, numerous PGT. of various ages, mafic schlerin, and AMPB inclusions
-all highly deformed with what appears to be the origin 270 degree direction (and assume) caught-up in the later deformation
-the AMPB inclusions appear to be a mixture of rock types including MASS-BSLT-AMPB, LAYD (possibly layered AMPB), and medium grained mesogabbro
-they appear to be a jumbled mass, largely floating in grey GRDR-PGMT

Rock Number: 2

Rock Type: granodiorite
Descriptors:
massive
leucocratic
Field Description:

-pink weathering with a pink and grey banded surface, slighly schleric
-this appears to be camp-BRDR and is obviously a younger intrusion at this location
-there is no indication of the early fabric which it sharply truncate on the MCSG
-contacts are planar at 175 degrees/78
-the SC measurement was taken in this rock
-there are vague pegmatitic patches with traces of GR

Minerals of Note
Mineral | Abundance (%)
garnet

Manitoba Geological Survey, 2017