AusAEM, Northeast Queensland, Australia, 2024 Airborne Electromagnetic Survey, Conductivity section images, geometry files and interpretation aids for use in the AEMInterpConvert workflow

Full description

The airborne electromagnetic (AEM) data, in which the AEMInterpConvert interpretation and conversion dependencies were derived from, were acquired between July and October 2024 by Geoscience Australia in partnership with the Geological Survey of Queensland. The survey covers a total of 30,500 flight line kilometres, flown at a nominal line spacing of 20 kilometres (Figure 1). The AEM data were processed using Geoscience Australia’s Layered-Earth-Inversion (GALEI, Brodie, 2016). Please see the parent publication, by Ley-Cooper & Deo (2025; https://pid.geoscience.gov.au/dataset/ga/150185) for further details on the acquisition and processing of these data.

The datasets contained in this package consists of Geoscience Australia’s Layered-Earth-Inversion (GALEI; Brodie, 2016) conductivity-depth estimates from the AusAEM, Northeast Queensland, Australia, 2024 AEM Survey (Ley-Cooper & Deo, 2025), delivered in JPEG format with accompanying geometry files. The purpose of this data package is to release the components formatted for use in the Multilayered chronostratigraphic AEM interpretation workflow (Wong et al., 2022) and the AEMInterpConvert tool (Nicoll et al., 2025). The conductivity section JPEGs are used in the interpretation workflow, whereas the geometry files are used to transform the 2D interpretations to 3D geographic space using the AEMInterpConvert tool. Release of these formats provide users the dependencies required to perform the interpretation and convert these interpretations to a range of formats compatible with various text editing, spreadsheet, 2D and 3D software packages, as well as the Estimates of Geological and Geophysical Surfaces (EGGS) database (Mathews et al., 2020) and Geoscience Australia’s Data Delivery Portal.

Additionally, this data package contains files that are intended to aid interpretations and facilitate data integration. To aid interpretations, this package contains map data extracted along each flight line. Known as Linear Geology, the extracted map data can be plotted above the corresponding JPEG within a geographic information system (GIS), providing the user with a geological dataset to interrogate and refer to within their interpretation space. The extraction of Linear Geology has been provided for two datasets, 1) the Surface Geology of Australia 1:1 million scale dataset 2012 edition (Raymond et al., 2012), and 2) the pre-Neoproterozoic, Neoproterozoic, Paleozoic and Mesozoic layers of the Layered Geology of Australia (Sanchez et al., 2024). World files have also been provided to facilitate superimposition of conductivity sections from the probabilistic inversions of the Northeast Queensland survey AEM data (Scarr et al., 2025) over the deterministic inversion conductivity section images. These world files register the probabilistic inversion conductivity images in the same space as the deterministic inversion images within a GIS, allowing users to consider the information in both the deterministic and probabilistic inversions during their interpretation.

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Maintenance and Update Frequency: asNeeded

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Purpose
The purpose of this product is to release the core components used in the Multilayered chronostratigraphic AEM interpretation workflow (Wong et al., 2022) and the AEMInterpConvert tool (Nicoll et al., 2025) for the AusAEM, Northeast Queensland, Australia, 2024 Airborne Electromagnetic Survey. The core files are the conductivity section images and geometry files. This product also releases additional files that can be used to improve the efficiency and quality of interpretations made using this workflow for this survey, these are the Linear Geology and the probabilistic to deterministic inversion image registration files.