Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6227
EASTING 560858 NORTHING 6033771 ZONE 14 DATUM NAD83
Date of mapping 06/25/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 11 | 54 |
fracture cleavage | 71 | 89 |

-foliation Z--tightly spaced shear fractures with minor pseudotachylite
-spacing varies from 5 m to 10 cm, zone is 1 m wide

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
massive
leucocratic
Field Description:

-late grey GRDR homogeneous, equigranular appears to be late outcrop, high level intrusion contains numerous sm. miarolitic patch pegmatites and discont. veins of granitic comp.
-contain rosettes of mag. up to 7 mm across
-generally unearly distributed down the centres of the seams
-unit is not same as any previous encountered, here or on Cross
Lake

Minerals of Note
Mineral | Abundance (%)
magnetite

Rock Number: 2

Rock Type: multi-component schlieric gneiss
Field Description:

-usual highly schlieric and highly deformed GRDR/TNLT
-scattered nebulus inclusions
-not clear whether these are rafts in rock type 1 or just intruded by it

Manitoba Geological Survey, 2017