High grade nickel-copper sulphides have been discovered over a 3.5km strike of the Cathedrals Belt
The Cathedrals Belt has a unique geological setting. It is an east-northeast trending belt that hosts mineralised ultramafics within granites.
When St George acquired the Mt Alexander Project from BHP Billiton, there had been only one discovery of nickel-copper sulphides in the Cathedrals Belt. This was at the Cathedrals Prospect with mineralisation inferred over a 400m strike. Drilling by St George in 2016 identified further high grade mineralisation at the Cathedrals Prospect, and discovered new deposits of nickel-copper sulphides at the Stricklands and Investigators Prospects. These new discoveries by St George increased the strike of recurrent mineralisation at the Cathedrals Belt to 3.5km.
Electromagnetic (EM) targeting for massive sulphides is very effective at the Cathedrals Belt. Up to December 2016, fifteen EM conductors had been drill tested and all had been confirmed as nickel-copper sulphide mineralisation.
The Cathedrals Belt remains underexplored. A major drill programme is planned for 2017 to test a number of new EM conductors, and to also complete infill and extensional drilling at the known areas of mineralisation for resource definition.
The Cathedrals Belt is interpreted to extend east into exploration licence E29/954 (100% St George), potentially for up to 8km. EM surveys are underway to identify EM targets for drilling.
The figure below is a plan view of the western section of the Cathedrals Belt (over TMI magnetics) showing the drill holes with nickel-copper sulphides with 2016 drill holes highlighted. Drilling success has identified nickel-copper sulphides recurrent over a 3.5km strike length.
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