Project Cormorant: Interpretations of Sub-Paleozoic geology of the Cormorant Lake map area from geophysical and drill core data

摘要

The Flin Flon-Snow Lake greenstone belt trends southwesterly and is bounded on the north by the Kisseynew gneiss belt and on the south by Paleozoic carbonate rocks. Airborne geophysical surveys indicate that the greenstone belt extends south beneath a thin (<100 m), shallow-dipping cover of Paleozoic rocks. Precambrian mineralization discovered in the greenstone belt north of the Paleozoic rocks should also be found beneath them. Project Cormorant is designed to map Precambrian geology beneath the Paleozoic cover to assist exploration for sub-Paleozoic mineral deposits.The mapping tools are aeromagnetic total fields, vertical gradient surveys, and diamond drill core. The geophysical data have been used to create a magnetic domain map for the sub-Paleozoic region. Geological data from drill core and exposed Precambrian rocks will be used to transform the magnetic domain map into a pseudo-geological map of the covered basement rocks.A U-Pb zircon age of 1845 + 10/-8 Ma has been obtained from the large central granitoid domain beneath Paleozoic cover rocks, comparable with ages of plutons in the Flin Flon belt.