The geology, petrography and geochemistry of gabbroic rocks of the Pants Lake Intrusive Suite on the Donner/Teck South Voisey's Bay property, North-Central Labrador, Canada

grantor: University of TorontoThe South Voisey's Bay property held by Donner Minerals Limited in North-Central Labrador hosts Ni-Cu-Co mineralization within gabbroic rocks of the Pants Lake Intrusive Suite (PLIS). Three drill holes from across the property were selected for study. Samples were analyzed for major, trace, rare earth elements and examined by petrographic microscope. The data suggests that two distinct intrusions make up the PLIS denoted as the North and South Intrusions. Geochemical comparisons to the Voisey's Bay troctolites indicates similar major element contents reflecting plagioclase-rich mineralogy, and trace element contents of Voisey's Bay are similar to the South gabbro units. Contamination sources are not obvious from data collected. All gabbros are chalcophile-element depleted when plotted on Cu/Zr and Cu/Hf diagrams. Sulphides would have settled out of a silicate melt, due to a contrast in density, perhaps in a previous chamber or feeder conduit.M.Sc