Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5115
EASTING 575963 NORTHING 6043141 ZONE 14 DATUM NAD83
Date of mapping 07/09/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
gneissosity | 59 | 33 |

-estimate of hanging wall contact 120/23
-contact not exposed
-footwall contact 262/78 (estimate)

PETROLOGIC DATA

Rock Number: 1

Rock Type: two component schlieric gneiss - intimate mixture of 2 major units
Field Description:

-highly distorted augen granodiorite base with numerous irreguluar grey granodiorite layers
-highly schlieric but with few recognizable inclusions

Rock Number: 2

Rock Type: gabbro
Field Description:

-Good Big Molson!!
-highly irregular attitudes in cumulus layering.
-some may be flow induced banding
-distortions of layers may be caused by thermal sag.
-there is no leuco gabbro phase
-everything appears to be 2-pyroxene gabbro with abundant magnetite
-because of the divergent contact this may represent on apical portion of a canoe shaped dike
-the footwall contact has a very thin 2 mm chill on an odd-textured (possibly lamprophyric) quartz bearing rock--see samples

Manitoba Geological Survey, 2017