Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5483
EASTING 575873 NORTHING 6041259 ZONE 14 DATUM NAD83
Date of mapping 06/28/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
cataclastic foliation | 66 | 81 |

-three photos of GRDR porphyry showing cataclasis to grey augen gneiss
-1 photo of laminated mafic siltstone and basalts

PETROLOGIC DATA

Rock Number: 1

Rock Type: granodiorite
Descriptors:
porphyroblastic
leucocratic
Field Description:

-grey microcline prophyry granodiorite with expense cataclasis producing areas of grey augen gneiss
-this augen gneiss looks much like the younger grey porphyritic granodiorite in the Clearwater Bay Complex
-the GRDR is intruded by coarse pink leucogranite dikes that are sheared and folded into intrafolial folds in the cataclastic foliation plane

Textural Features
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit
mafic mineral |  | 0.0 | 0.0 | 4.0 | %

Rock Number: 2

Rock Type: SLST
Descriptors:
laminated
mafic
Field Description:

-interbedded mafic to amphibolitic siltstone and basalts
-sed. are probably tuffaceous material (see sample)
-they are mylonitized and deformed in granodiorite

Manitoba Geological Survey, 2017