Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 83 STATION 5088
EASTING 568216 NORTHING 6043826 ZONE 14 DATUM NAD83
Date of mapping 07/04/1983

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 76 | 54 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Field Description:

-variety of complex layered and massive amphibolite, some layers highly mafic, massive, and featureless
-Other layers finely laminated, definately sedimentary in appearance. Abundant calc-silicate pods and epidote/carbonate masses, highly boudinaged. Average. composition is between diorite and gabbro. Some layers have dissected irregular diopsidic layers remniscent of highly deformed pillow salvages

Minerals of Note
Mineral | Abundance (%)
garnet

Rock Number: 2

Rock Type: pyroxenite
Descriptors:
massive
hornblende - biotite bearing
Field Description:

-probable high level mafic dike, around 1.8 m. across. Occurs as a series of disjointed boudins, several metres in length.
-clinopyroxene pseudomorphed by dark greenish black amphibolite

Rock Number: 3

Rock Type: gneiss
Descriptors:
pegmatitic
granitic
Field Description:

-large 1 to 3 m. sills and stockwork of beige granite with clotted pegmatite
-garnet ubiquitous, biotite major mafic, blocky k-feldspars are blue grey mottled to white.

Manitoba Geological Survey, 2017