Cross Lake Project (1983-86)

Geologist    P.G. Lenton     Year    84     STATION    5452
EASTING   572414     NORTHING   6055164     ZONE   14     DATUM   NAD83
Date of mapping    06/23/1984

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
bedding 194 85

Minor Folds
Type Symmetry Strike Dip Plunge Azimuth
similar fold S 209 0 45 22

-several general photos to end roll (one photo 2nd or 3rd from end will be black)
-three photos an new roll of Bouma beds
-first sequence has several calc-silicate layers and boudins

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
layered
muscovite - plagioclase bearing

Field Description:

-sample a--calcsilicate layer B should be then sectioned-either a Bouma E shale or mylonite (it is in 2nd photo sequence and looks like shale)
-good Burnt wood style turbidites
-Bouma ABE sequences, calcsilicate horizons, psammite and muscovite blastic pelite layers
-large scale folding with disharmonic parasites and abundant ptygmatic folding of injected lit

Rock Number: 2

Rock Type: granodiorite
Descriptors:
pegmatitic

Field Description:

-variable 5 to 25 % granodiorite and pegmatitic grandiorite injection
-tourmaline rich especially pegmatite material
-tourmaline metasomatism of greywacke on contacts

Minerals of Note
Mineral Abundance (%)
tourmaline
garnet
biotite

Manitoba Geological Survey, 2017