Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5522
EASTING 567695 NORTHING 6051164 ZONE 14 DATUM NAD83
Date of mapping 07/01/1984

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 62 | 88 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 62 | 88 |

-whale back ridge with 1.5 m of white pegmatites along the spine

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
layered
psammitic
Field Description:

-well bedded and laminated psammites with abundant CLCC layers boudinaged
-CLCC have diopside cores (sometimes single crystals up to 15 cm) with hornblendic rims (see photos)
-deformation in bedding is parallel with a lot of intrafolial folding CLCC and boudinage
-extensive quartz veining with TL
-SAMPLE B is CLCC margin with DP-AP+calcite
-peg. on spine is simple QZ-white MC-BO-GR-AP-/+TL

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

Rock Number: 2

Rock Type: wacke
Descriptors:
massive
amphibolite
Field Description:

-around 2 m exposed at SE corner of outcrop
-dark grey-black weathering sandy textured rock with 2x4 mm HB crystals (subhedral)
-vague lamination seems to be in conformable contact with GRCK

Manitoba Geological Survey, 2017