Growth focused Western Australian nickel company St George Mining (ASX: SGQ) has provided its quarterly activities report for the period ended 30 September 2020.
Mt Alexander project:
Thick mineralised mafic-ultramafic units – which are the host rocks for nickel-copper sulphide mineralisation – have been intersected below the shallow high-grade nickel-copper sulphide deposits at the Cathedrals Belt.
Downhole electromagnetic (DHEM) surveys in the latest drill holes identified new EM anomalies for follow-up testing.
Two outstanding conductors identified by the DHEM survey in MAD184 – modelled with conductivity of 49,000 and 16,200 Siemens respectively and an electrical signature consistent with a massive sulphide source.
Diamond drilling of new EM conductors is underway.
Excellent results from preliminary metallurgical test work on mineralisation from the Investigators Prospect with separate high-grade nickel and copper concentrates produced including high values for platinum group metals and cobalt.
Multiple high-priority targets identified for potential copper and gold mineralisation.
Programme of Works for inaugural drill programme approved by the Department of Mines, Industry Regulation and Safety (DMIRS).
Mt Alexander project:
Deeper drilling delivers exploration success:
Diamond drilling of deeper targets for potential nickel-copper sulphide mineralisation along the Cathedrals Belt commenced in June 2020.
These latest drill holes have intersected mineralised mafic-ultramafic units at depth across an east-west strike of the Cathedrals Belt that extends for more than 4km.
The mafic-ultramafic units are intrusive-style rocks that are known to host high-grade massive nickel-copper sulphides at shallow depths along the Cathedrals Belt.
The identification of further thick intrusive-style rocks in these locations has confirmed that the extensive Cathedrals Belt intrusive mineral system continues at depth.
The results in MAD181, MAD184, MAD185 and MAD186 were particularly significant with thick intersections of mafic-ultramafic units that included disseminated and blebby nickel-copper sulphides.
These disseminated and blebby sulphides can represent the halo around proximal massive sulphide mineralisation and support the potential for the presence of higher-grade mineralisation nearby.
Drilling has confirmed that the mineralised intrusive structure at the Cathedrals Belt extends for more than 4km in an east-west strike and remains open to the east and west.
The structure dips to the north-northwest at an angle of about 40 degrees with mineralisation intersected along this structure from near surface to about 600m down-dip – establishing a large target horizon for the presence of further nickel-copper sulphide mineralisation.