Research indicates extended mineral province

13 July 2011

Gravity image showing the
boundaries between
the Mount Isa province
and the Broken Hill Block.
© Geoscience Australia

Investigation of the geological history associated with some of Australia's richest mineral regions has raised the possibility for the discovery of further, world class mineral deposits.

This follows fresh interpretation of geological features in gravity and aeromagnetic data extending from Mount Isa to Broken Hill which provide evidence that these mineral provinces were once joined together.

The gravity and aeromagnetic data indicate that a major boundary on the southern margin of the Mount Isa Province and a similar boundary to the north of Broken Hill have been separated through tectonic processes.

The Chief of Geoscience Australia's Minerals Division, Dr James Johnson, said that when the intervening crust is removed, individual anomalies in the gravity data can be traced from one province to the other across the boundaries.

"The interpretation suggests that the southern extension of the Mount Isa Province under cover has high potential for both sediment-hosted zinc-lead-silver and iron oxide copper-gold deposits which can be expected to extend into the region between the two boundaries," Dr Johnson said.

"In addition, younger parts of the Curnamona Province, particularly the Paragon and Sundown Groups, may have potential for sediment-hosted zinc-lead-silver deposits akin to the Mount Isa and Hilton-George Fisher deposits," he said.

"It also has important implications for the mineral potential in Proterozoic regions of Australia, particularly in the country's eastern margin" Dr Johnson said.

Further details are available in AusGeo News.

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