Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    86     STATION    6383
EASTING   564581     NORTHING   6048142     ZONE   14     DATUM   NAD83
Date of mapping    07/17/1986

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 45 85
cataclastic foliation 274 59

-photos 1 and 2
-sygmodial rotation of phenocrysts originally aligned into 270 into 050

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
megacrystic
biotite

Field Description:

-dominant structural fabric for outcrop has shifted 050
-phenocryst alignment is obviously still 270 direction along with augening and development of feldspathic pressure shadows and the early granitic 'lit'
-F2 was measured on a 5 cm schlieric cataclastic zone
-050 direction is a BO fabric and a new plane of augen development accompanied by younger Granitic and pegmatitic lit
-early layering is extensivly folded as NE plunging isoclinal Z-assymetric folds
-the axis of the folds appears to be the 2-intersection of F1 + F2
-many of megcrysts of microcline show a true blue-->yellow blue moonstone opalescence
-this indication of microlaminar perthite doesn't appear to have any comp. significance at this location


Manitoba Geological Survey, 2017