A 1,000-km Buried Arc Redraws South-eastern Australia
GLOBAL GEOLOGICAL PULSE 01 | AUSTRALIA
A continuous Delamerian arc now traces more than 1,000 km beneath sedimentary cover across South Australia, New South Wales and Victoria. The continental-scale structure emerged from the first deep-dive project under Australia’s 35-year Resourcing Australia’s Prosperity initiative, bringing geophysics, geology and groundwater information together across a region whose prospective rocks are commonly hidden beneath younger basins.
The new framework narrows exploration corridors for copper, gold and critical minerals and improves the geological context for groundwater systems. Near Wilcannia, the programme has also identified areas that may warrant investigation for managed aquifer recharge. The practical shift is from isolated anomalies to a connected tectonic architecture: a buried convergent-margin system can guide where explorers expect particular mineral systems and where hydrogeologists need to account for basement geometry beneath cover.
The importance is not a single discovery but the scale of the map. A 1,000-km arc crossing three states creates a common structural model for mineral exploration, groundwater assessment and future field validation, while leaving ore grade, aquifer performance and project feasibility to be demonstrated locally.
Source reference in the September issue: [82]. Full source register: pp. 59–60.
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