St George Mining claims massive nickel-copper sulphide discovery at Investigators
THE DRILL SERGEANT: St George Mining (ASX: SGQ) attracted an audience to its booth at Diggers and Dealers by spruiking its announcement of the discovery of massive nickel‐copper sulphides from a maiden drilling program on the Investigators prospect at the company’s Mt Alexander project in Western Australia.
Two drill holes (MAD31 and MAD32) targeted separate downhole EM conductors at the Investigators prospect with both intersecting massive nickel‐copper sulphides hosted by mineralised ultramafics, which have been intruded by later granites.
MAD31 tested Anomaly 2 at Investigators and was drilled to a downhole depth of 160m, intersecting approximately 15m of ultramafic with occasional blebby and disseminated sulphides increasing downhole and then massive nickel‐copper sulphides from 112.05 metres to 113.08m downhole.
St George said the massive sulphides it encountered in MAD31 include a pentlandite vein that runs most of the length of the intersection with an average nickel value (based on field XRF analysis) of 28 pwe cent nickel.
Further details of the sulphide mineralisation intersected by MAD31 from 97m to 113.08m include:
15.05m, from 97‐112.05m, of occasional blebby and disseminated sulphides increasing downhole to 0.4m of matrix sulphides from 111.5m (spot XRF readings of the matrix sulphides average 2 per cent nickel, 1 per cent copper)
1.03m, from 112.05‐113.08m, of massive sulphides with spot XRF readings ranging 2 per cent nickel to 28.6 per cent nickel (average 7%Ni) and 0.5 per cent copper to 4.5 per cent copper (average 2.5%Cu).
Hole MAD32 was completed to a downhole depth of 92.7m to test an off‐hole DHEM conductor that was identified from drill hole MAD24 and was modelled at a depth of 50m.
MAD32 intersected approximately 12.7m of ultramafics from 42m with some blebby and disseminated sulphides and then massive nickel‐ copper sulphides, including:
11.76m, from 42m to 53.76m, of occasional blebby and disseminated sulphides increasing from 51.1m;
0.77m, from 52.76m to 53.53m, of massive sulphides with spot XRF readings ranging 1.7 to 16.4 per cent nickel (average 8%Ni) and 0.4 to 2.9 per cent copper (average 2%Cu).
“The new discoveries at Investigators and Stricklands, with evidence of exceptionally high-grade mineralisation, highlight the increasing prospectivity of the underexplored Mt Alexander project,” St George Mining executive chairman John Prineas said in the company’s announcement to the Australian Securities Exchange.
“The successful drilling by St George has significantly expanded the size of the high-grade nickel‐copper system in the Cathedrals Belt and established Mt Alexander as a new and significant nickel sulphide project in Western Australia.”
Website: www.stgm.com.au