Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6182
EASTING 575277 NORTHING 6045676 ZONE 14 DATUM NAD83
Date of mapping 06/20/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 297 | 34 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: ULMFFL
Descriptors:
ultramafic composition
Field Description:

-dark greenish black weathering green to greenish grey on fresh surface
-comp. is probably UM
-rock is either sheared volcanic or vol. sed.
-some layers rich in MG with a nubbly weathering pattern caused by carb. weathering out
-rock is essentially mafic to UM rock with breccia fragments sitting in carb. other layers around massive, around layered have epidotite horizons
SAMPLE A -massive layered
SAMPLE B -breccia
-brecciated unit often has large cm size HB growing in carb. matrix in gen. unit looks like a sed. section rather than pillow breccia or primary volcanic breccia

Manitoba Geological Survey, 2017