Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6060
EASTING 570001 NORTHING 6048142 ZONE 14 DATUM NAD83
Date of mapping 06/19/1985

STRUCTURAL DATA

Linear Structures
Type | Plunge | Azimuth
boudin axis | 0 | 0

PETROLOGIC DATA

Rock Number: 1

Rock Type: tonalite
Descriptors:
agmatitic
leucocratic
Field Description:

-homogeneous equigranular grey intrusive containing a multitude of elongate ampb. inclusions, and large raft blocks
-much of ampb is a simple explosion breccia

Rock Number: 2

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

-Featureless black ampb with a strong platy schistocity
-no layering
-could be either a massive basalt or a fine grained intrusion
-inclusions severly stretched in lineation direction

Rock Number: 3

Rock Type: tonalite
Descriptors:
leucocratic
Field Description:

-anastomosing vein network of later quartz porphyry intrusion that cuts both TNLT and ampb but is fairly highly deformed, baudinaged and lineated
-dikes vary from 1 cm to 40 cm, and contain inclusions of TNLT

Manitoba Geological Survey, 2017