Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6059
EASTING 569694 NORTHING 6048110 ZONE 14 DATUM NAD83
Date of mapping 06/15/1985

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
inclusion layering | 69 | 73 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 69 | 73 |

-granite is middle west channel in contact with the big Molson Dike that runs up middle of channel

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Descriptors:
layered
leucocratic
Field Description:

-pink and white weathering fine grained granite with extrusive areas of pegmatite of the same composition
-pegs irregular anatomosing bodies with gradational boundaries and are undoubtedly formed in situ
-GR up to 2 cm forms in layers, often associated with a coarsening of the granite
-GR is mixed with quartz and BO--can't tell without thin section if this is a late retrograde metamorphism or primary magmatic effect
-mm size, GR also occur as clusters with 50-60 grains in a 10 cm oval patch
-peg pods have coarse BO, blue quartz and mottled blue-grey-white KF
-MV occurs as small greenish-yellow irregular masses in the foliation plane and may be late and related to shearing
-some areas of outcrop are spotted with 1 cm rust hemotitic circles but I see nothing causing them
-GR are a deep burgundy red colour
-coarse primary MV is absent
PHOTOS
1 & 2 layers of GR in fine Leuco-GRNT
3 coarse pegmatite pod
4 gradational boundary on pegmatite
5 coarse BO and GR in pegmatite
6 general view of outcrop

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

Manitoba Geological Survey, 2017