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St George Mining has uncovered additional massive nickel-copper sulphide targets at the Mt Alexander project in Western Australia.

In April, the explorer discovered high-grade nickel-copper sulphides in hole MAD199.

It has since uncovered further targets in its downhole electromagnetic (DHEM) surveys and gravity survey at the Investigators and West End prospects, both pointing to nickel-copper sulphides.

The DHEM survey for MAD199 modelled three electromagnetic (EM) plates, while the MAD195 hole also resulted in the three EM plates, with one intersecting MAD199.

This suggests there is more than one nickel copper sulphide source.

“All EM plates have varying strike lengths, dip directions and conductivities, indicating a complex geometry to the massive sulphide source – and the likelihood that there is more than one source,” St George stated.

The gravity survey at West End and Investigators has confirmed multiple gravity highs, indicating further potential for massive sulphides.

St George executive chairman John Prineas said the gravity survey was a valuable asset.

“The results of the gravity survey are very exciting and could provide a great advance in the targeting of nickel-copper sulphides in the Cathedrals Belt,” he said.

“A number of the gravity features are compelling drill targets for massive sulphides.

“These gravity highs are located within the interpreted trend of the mineralised intrusive host unit, an ideal location for dense massive sulphides.”

The electromagnetic survey also points to further high-grade potential.

“The concurrent use of downhole EM and drilling is continuing to provide a vector to mineralisation at depth,” Prineas continued.

“The multiple EM plates modelled around the new high-grade discovery in MAD199 support the potential for further high-grade mineralisation in this area.

“Drilling continues 24/7 and we look forward to reporting more drill results.”

In April, St George confirmed it discovered a thick 10.96-metre interval of nickel-copper sulphides from 333.6 metres downhole at the MAD199 hole.

This was the deepest discovery of massive sulphides drilled in the Cathedrals Belt.