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Hydrogeochemical Baseline Mapping of the Great Artesian Basin

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Created 13/01/2025

Updated 13/01/2025

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The first large-scale projects for geological storage of carbon dioxide on the Australian mainland are likely to occur within sedimentary sequences that underlie or are within the Triassic-Cretaceous, Great Artesian Basin (GAB) aquifer sequence. Recent national1 and state2 assessments have concluded that certain deep formations within the GAB show considerable geological suitability for the storage of greenhouse gases. These same formations contain trapped methane and naturally generated CO2 stored for millions of years. In July 2010, the Queensland government released exploration permits for Greenhouse Gas Storage in the Surat and Galilee basins.An important consideration in assessing the potential economic, environmental, health and safety risks of such projects is the potential impact CO2 migrating out of storage reservoirs could have on overlying groundwater resources. The risk and impact of CO2 migrating from a greenhouse gas storage reservoir into groundwater cannot be objectively assessed without knowledge of the natural baseline characteristics of the groundwater within these systems. Due to the phase behaviour of CO2, geological storage of carbon dioxide in the supercritical state requires depths greater than 800m, but there are few hydrogeochemical studies of these deeper aquifers in the prospective storage areas. Historical hydrogeochemical data are compiled from various State and Federal Government agencies. In addition, hydrogeochemical information is compiled from thousands of petroleum well completion reports in order to obtain more information on the deeper aquifers, not typically used for agriculture or human consumption. The data are passed through a QC procedure to check for mud contamination and to ascertain whether a representative sample had been collected. The large majority of the samples proved to be contaminated but a small selection passed the QC criteria. The full dataset is available for download from GA's Virtual Dataroom. Oral presentation at "Groundwater 2010" Conference, 31 October - 4 November 2010, Canberra

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Title Hydrogeochemical Baseline Mapping of the Great Artesian Basin
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/831f5aab-f9a7-47d9-b8d3-4ba23029106e
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[133.0, -32.0], [150.0, -32.0], [150.0, -10.0], [133.0, -10.0], [133.0, -32.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Hydrogeochemical Baseline Mapping of the Great Artesian Basin". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/hydrogeochemical-baseline-mapping-of-the-great-artesian-basin

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