Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6311
EASTING   566355     NORTHING   6048750     ZONE   14     DATUM   NAD83
Date of mapping    07/08/1986

STRUCTURAL DATA

Minor Folds
Type Symmetry Strike Dip Plunge Azimuth
similar fold S 224 90 30 24

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
hornblende - garnet bearing

Field Description:

-layered sequence of mafic sed. largly of HBGT basaltic comp. with interbeds of light grey to brown coarse feldspathic sand or lithic grey wacke
-majority of outcrop is cm-laminated HB rich volcanic sed.
-appears to be massivly bedded unit, on the order of 2 or greater m. and fine continual lamination
-contains sporadic GT and intruded by thin quartz-carbonate viens
-interbeds are highly garnetiferous, HB bearing feldspathic sands.
-irregular layers of black 'vuggy' HD-plag., rocks
-outcrop intensly folded by series of shallow plunging upright S-folds
-place majority of SS structurally underneath the layered amphibole
-axial planes have been intruded?? by mag-peristerite pegmatites
SAMPLE A laminated ampb
SAMPLE B grey feldspathic SS
SAMPLE C mass. ampb
SAMPLE D per. pegmatite


Manitoba Geological Survey, 2017