Update on GA's national-scale chronostratigraphic airborne electromagnetic interpretation

ASEG ACT Tech Talk - May 12 2026 "Update on Geoscience Australia’s national-scale chronostratigraphic airborne electromagnetic interpretation" Abstract: The continental-scale airborne electromagnetic (AEM) interpretation covers almost 30% of the Australian continent at 20 km flightline spacing. This interpretation aims to capture the geoelectrical features that can be interpreted as major chronostratigraphic boundaries, specific stratigraphic contacts, discrete electrical conductors and their possible sources, faults, and groundwater information. These interpretations are accompanied by a wide range of supporting data, such as stratigraphic unit information, consistent with the Australian Stratigraphic Units Database, confidences and references to the geoscientific data that informed the interpretation. This supporting information complements the geometric component, by facilitating filtering, interrogation and modelling of the dataset. To accomplish this, a bespoke workflow has been developed to simultaneously capture the interpretation geometries and attribute this supporting data. Three areas of interest in Western Australia, the Northern Territory and Queensland are currently being interpreted, which will significantly increase the coverage of this interpretation across the continent. These interpretations have various applications, including cover modelling, subsurface mapping and prospectivity modelling Speaker: Sebastian Wong is the 3D Geoscience Integration Activity Leader at Geoscience Australia, managing national collection and storage of subsurface data from geological and geophysical sources. His work contributes to constructing a continental geological configuration, cover thickness modelling, and provides key precompetitive data for environmental management, resource exploration, hazard mapping, and geoscientific research.