Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5087
EASTING   568171     NORTHING   6043996     ZONE   14     DATUM   NAD83
Date of mapping    07/04/1983

STRUCTURAL DATA

Layering:
Layering type Strike Dip top Direction
bedding 101 67 N

Dikes and Sills:
Rock Number Type Width (m) Strike Dip
0 GRDR 0.00 61 61

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
schistose
psammite

Field Description:

-sandy textured, moderately mafic, probably associated with the volcanics section.
-numerous small garnet - hornblends amphibolite clots
- 80 cm rusty gossan zone within foliation (parallel to layering).
-garnets fractured, highly included with biotite rims.
-layering is quite delicate with "suggestion" of tops overturned, based on grading.
-gossen appears to be associated with a more massive coarse amphibolite. There are several fairly continuous medium grained to pegmatitic granodiorite lit, parallel to bedding.
-pinch and swell and boudinage are common but extensional separation is quite limited.
-there is no evidence of a mobilisate developing in the greywacke

Minerals of Note
Mineral Abundance (%)
hornblende
biotite
garnet


Manitoba Geological Survey, 2017