Sulphide mineralization discovered to date in the project area can be characterized as Komatiite-hosted Ni-Cu-Co-(PGE) deposit type, which recognizes two sub-types (Lesher and Keays, 2002):
1. Type I – Kambalda-style: channelized flow theory; komatiite-hosted; dominated by net textured and massive sulphides situated at or near the basal ultramafic/footwall contact with deposits commonly found in footwall embayments up to 200 m in strike length, 10s to 100s of meters in down-dip extent, and meters to tens of meters in thickness; generally on the order of millions of tonnes (generally <5 Mt) with nickel grades that are typically much greater than 1% nickel; tend to occur in clusters (e.g., Alexo-Dundonald, Ontario; Langmuir, Ontario; Redstone, Ontario; Montcalm, Ontario; Thompson, Manitoba; Raglan, Quebec).
2. Type II – Mt. Keith-style: sheet flow theory; thick komatiitic olivine adcumulate-hosted; disseminated and bleb sulphides, hosted primarily in a central core of a thick, differentiated, dunite-peridotite dominated, ultramafic body; more common nickel sulphides such as pyrrhotite and pentlandite but also sulphur poor mineral Heazlewoodite (Ni 3 S 2) and nickel-iron alloys such as Awaruite (Ni 3 -Fe); generally on the order of 10s to 100s of million tonnes with nickel grades of less than 1% (e.g., Mt. Keith, Australia; Dumont Deposit, Quebec).
Sulphide nickel-copper-cobalt-PGE mineralization in the Crawford Ultramafic Complex is interprete ........
