Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5575
EASTING 577931 NORTHING 6059864 ZONE 14 DATUM NAD83
Date of mapping 07/11/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 44 | 75 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: feldspar - quartz porphyry
Descriptors:
schistose
DCIT
Field Description:

-unusual texture to the rock
-generally it's the normal qpp but the central area of outcrop has an intricate alteration network associated containing it
-the veining seems to be hornblende bearing
-in general the rock has an inhomo character containing erratic distribution of phenocrysts
-the alteration does not look to be strictly a tectonic point
-this maybe a dacite breccia
-this location is all dacite but the island 100 feet away has dacite in contact contains mafic rocks
-this hamybe a pneumatolitic breccia or possibly a crackle breccia on a dome
-there is extensive carbonate veining

Manitoba Geological Survey, 2017