Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6007
EASTING 575977 NORTHING 6045283 ZONE 14 DATUM NAD83
Date of mapping 06/07/1985

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 285 | 36 |

Linear Structures
Type | Plunge | Azimuth
rodding | 31 | 102

-contact zone between Metis Complex and CWB complex
-the two granitic series are separated by 110 M of "buggered" ampb.

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
massive
volcanic derived
Field Description:

-Black, massive, HB-BO ampb.
-contains 30% injected tonalite and pegmatite
-was probably basaltic but all primary features obliterated

Rock Number: 2

Rock Type: gneiss
Descriptors:
layered
Field Description:

-feldspar rich; probably sedimentary gneiss
-up to 50-60 % injected material
-weathers beige to grey with irregular fabric
-was probably a dirty sandstone with ampb layering

Rock Number: 3

Rock Type: granite
Descriptors:
pegmatitic
leucocratic
Field Description:

-beige to pink weathering GRDR that occurs as extensive vein and sill networks.
-sills up to 2 m thick become randomly pegmatitic
-fairly typical of the late granite-pegmatite-aplite suite that occurs on the margins of CWB complex

Minerals of Note
Mineral | Abundance (%)
biotite
muscovite
magnetite

Rock Number: 4

Rock Type: diabase
Field Description:

- 10 cm Molson, of the MG variety
-following the normal 050 degree trend

Manitoba Geological Survey, 2017