Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6075
EASTING 0 NORTHING 0 ZONE 14 DATUM NAD83
Date of mapping 06/20/1985

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 59 | 65 |
fault | 308 | 68 |

-2 m fault/breccia/mylonite

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
augened
leucocratic
Field Description:

-Classic Whiskey Jack GRDR with grey-white mottled feldspars
-very unusual situation -- there are zones of light shearing with a few relatively undeformed inclusions of volcanic, seds, and ULMF
-these 2 to 10 m wide and are separated by zones of intense cataclastis that are packed with mafic and ultramafic inclusions and are extensively augened
-these are offset by late faults (mylonite/breccia zones up to 2 m wide-see measurements)
-whether the inclusion rich zones are weak zones that shear preferentially or the inclusion rich material represents slices several metres wide that are faulted in from depth is unknown

Manitoba Geological Survey, 2017