Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5000
EASTING 571781 NORTHING 6046740 ZONE 14 DATUM NAD83
Date of mapping 06/17/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 208 | 87 |

Minor Folds
Type | Symmetry | Strike | Dip | Plunge | Azimuth
similar fold | Z | 41 | 76 | 55 | 61

minor fold has strong associated axial planar schistosity

PETROLOGIC DATA

Rock Number: 1

Rock Type: wacke
Descriptors:
layered
hornblende-plagioclase bearing
finely laminated
calc-silicate mineral/concretion
Field Description:

-Trace magnetite.
-Probable volcanic wacke/siltstone.
-Finely laminated with calcsilicate lenses. Possible thin mafic tuff horizons.

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
groundmass grainsize |  | 0.0 | 0.1 |  | mm
mafic mineral |  | 0.0 | 0.0 | 25.0 | mm
bedding thickness |  | 1.0 | 5.0 |  | m

Minerals of Note
Mineral | Abundance (%)
diopside
magnetite

Rock Number: 2

Rock Type: pegmatite
Descriptors:
granitic
Field Description:

Boudinage:
-Block boudins of beige pegmatite.
-Minor marginl shearing.
-Primitive zoning with 3-10cm potassium feldspar in core
-Almost no free quartz

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
raft size in metres |  | 20.0 | 120.0 |  | m

Minerals of Note
Mineral | Abundance (%)
potassium feldspar
biotite
tourmaline

Manitoba Geological Survey, 2017