Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    85     STATION    6015
EASTING   574949     NORTHING   6044611     ZONE   14     DATUM   NAD83
Date of mapping    06/07/1985

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
schistosity 2 20

-2 photos (unlabelled) from boat showing seds at low angle climbing over granite margin

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
hornblende - biotite bearing

Field Description:

-extensivly altered and recrystallized by intrusion of the main body of CWB.
-little can be recognized over than mafic HB rich character; suggesting volcanic origin
-foliation and layering seem to correspond to contact with gray granite to the west
-once again suggesting the supracrustals are drapped over a dome margin

Rock Number: 2

Rock Type: granite
Descriptors:
massive
leucocratic

Field Description:

-Granite contains minor amounts of granite adjacent to contact of supracrustals but otherwise resembles main phase of CWB complex
-Only exception to this is fact it has undergone hardly any shearing or tectonic disruption.
-fine grain chill(?)
CA-G-28


Manitoba Geological Survey, 2017