Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6349
EASTING 570744 NORTHING 6049941 ZONE 14 DATUM NAD83
Date of mapping 07/12/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 75 | 90 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
schistose
feldspathic
Field Description:

-much as previous station, although quartz-rich psammites + calc-silicate layers are not as common and dominate rock type is a light grey, feldspar rich... quartz 35% greywacke
-layers with feldspar blasticsis far more common and restricted to BO bearing layers
-baudinage and overtightened synclinal Z-asymetric folds have largely disrupted bedding
-the feldspathic sands are commonly graded

Minerals of Note
Mineral | Abundance (%)
muscovite

Rock Number: 2

Rock Type: pegmatite
Field Description:

-25% exposure is dikes, thicknesses varying from cm's to > metre of highly deformed pegmatite
-bird's foot QZ-MV aggregates common
-BO abundant along margins and as internal foliated masses in dikes
-GR is a rare accessory

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

Manitoba Geological Survey, 2017