Greenfields deposit
The Greenfields deposit is located within the Greenfield dolerite sill within the Coolgardie Greenstone Belt.
There are three rock types present in the pit; dolerite (southwall), felsic volcaniclastics (footwall to mineralisation) andultramafics(North Wall). The mineralisation at Greenfields forms a conjugate set of steep and moderate dipping lodes.
Mineralisation is hosted by a quartz vein stockwork that exploits a conjugate set of brittle-ductile fractures. Bucky quartz veins have accessory pyrrhotite and arsenopyrite sulphides and sometimes visible gold is observed.Veins display crack seal textures and are commonly weakly wall rock laminated.
The wall rock to the veins is commonly bleached over 0.2-0-.4m intervals.
Brilliant South deposit
The deposit lies on the western margin of the Archaean Norseman–Menzies Greenstone Belt. Host rocks at Brilliant are a sequence of Archaean Basalts and Ultramafics, which have been intruded by a suite of porphyry dykes (also described as granodiorites). The porphyries host the bulk of the mineralisation, occurring in two orientations:
1. Steeply dipping (70 -80°) with an average width of 3 to 4m(Historically conventional model used for this resource estimate),
2. Shallow east dipping (20 -40°) with average widths of up to 2-4m(not modelled at this time).
Mineralisation consists of a stock work of quartz / sulphide micro-veining and albi ........