Ni-Cu-Co-PGE mineralisation is located at or near the base of subvolcanic mafic-ultramafic intrusive complexes referred to as the “Raglan Formation”. Resources are generally determined at a 1.5% Ni cut-off and are composed of disseminated, net-textured, and massive pyrrhotite-pentlandite-chalcopyrite rich sulphides contained within 131 individual sulphide lenses, extending from surface to more than 900m vertical depth. The size of these high-grade sulphide lenses varies significantly from 0.01Mt to 6.1Mt, averaging 0.2Mt.

The mineralised zones on the Raglan property that were drilled in 2011 and 2012 are named: East Lake, Zone 2, Katinniq, Zone 5-8, Zone 13-14, Boundary and Donaldson.

East Lake & immediate vicinity
Kikialik is located within the East Lake zone that also comprises five mineralized ultramafic complexes labelled Main Sill, South Sill, East Sill, West Sill, and Southeast Sill. The "Sill" nomenclature is maintained because of historic use, and has no bearing on genetics or mode of emplacement. All the five `sills' are characterized by anomalous nickel mineralization.

Gabbro and thick sequences of massive to pillowed komatiitic basalt, often exhibiting flow top breccia and spinifex textures, overlie the Zone 3 ultramafic complex.

Zone 2
Zone 2 is located at the eastern end of the elongated northeast-southwest ultramafic body that also hosts Zone 3 mineralization. The northwest dipping, northeast plunging, ult ........

At Raglan Mine, two mining methods are used to extract the ore from lenses: the cut and fill method and the long hole method. Cut and fill mining is a selective method of mining in which horizontal cuts (slices of ore) are removed advancing upwards. Upon completion, the cut is filled back to the access ramp with backfill material, which is often composed of waste material excavated from ramps and drifts. Another drift is driven on top of the filled cut. This process continues until the top of the stope is reached.

At Raglan Mine, the cut and fill method is used at the bottom of the lens, when the dip of the lens is low and prevents the use of the long hole method. A small proportion of each lens is operated by this technique, the rest of the lens is operated by long hole method. The proportion between the two methods varies from one lens to another. It depends on the characteristics of the lens and also on the selected cut-off grade. It is important to know the proportion of each lens to be operated by each mining method given that their production rates differ greatly: the long hole mining method has a much higher production rate than the cut and fill mining method.

The stopes must be backfilled. This is because when a stope is excavated, the void left by the excavation creates pressure on the rock that surrounds it and this may cause subsidence. To do the backfilling, the engineers use waste rock from the excavation of ramps and drifts as backfill mat ........

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