Slide 1: Idefix Project and the Prospectivity of the Montagnais Sills
IDEFIX PROJECT and the Prospectivity of the Montagnais Sills, Labrador Trough, Quebec. 1
Slide 2: Gabbros of the Labrador Trough
Gabbros of the Labrador Trough At over 500 km long and 50 km wide, the gabbroic sills of the Labrador Trough represents a massive target area for magmatic Ni-Cu-PGE deposits. Based on the geochemical analysis of over 3,000 samples, Northern Shield developed a geochemical exploration methodology that
Slide 3: Cumulates versus Non-Cumulates
Cumulates versus Non-Cumulates The slide shows Cr/V vs M gO for about 3,000 samples Northern Shield has collected from the M ontagnais sills in the Labrador Trough. There are clearly two population groups in this plot. The group dominated by the red and purple dots indicates a fractionated magma as
Slide 4: Enrichment Relative to Mantle Source
Enrichment Relative to Mantle Source This prospectivity of the M ontagnais Sills is further highlighted by observing the Cu/PGE vs PGE ratio, which determines if a magma is depleted or enriched in PGE. This plot clearly shows that the regional gabbro is dominantly depleted in PGE whereas the Idefix-
Slide 5: Prospectivity Map
Prospectivity Map Idefix Gabbro Regional Gabbro The geochemical discrimination of the samples can be used to spatially identify where the enriched “Idefix-type” gabbro are located within the Labrador trough. The vast majority of the M ontagnais Sills, as currently mapped, consists of “Regional” Gabb