Mapped and projected extents of geology and geologic features in Australia, including: surface geology, regolith geology, solid geology, chronostratigraphic surfaces, and province boundaries. The database includes igneous, sedimentary and structural characteristics, age limits, parent and constituent units, relations to surrounding provinces, and mineral and petroleum resources. based on field observations interpretations of geophysics and borehole data. <b>Value:</b> Data used for understanding surface and near surface geology. The data can be used for a variety of purposes, including resource exploration, land use management, and environmental assessment. <b>Scope:</b> Australia and Australian Antarctic Territory

The Georgina Basin is a Neoproterozoic to Lower Devonian sedimentary basin covering 325,000 km² of western Queensland and the NT. It is a northwest-southeast-trending extensional basin, with prospective conventional and unconventional hydrocarbon targets in Cambrian and Ordovician carbonate and siliciclastic rock units. The unconventional gas and oil potential of the basin has led to recent exploration interest, although the basin has been relatively less explored in the past. At the southern end of the basin, depocentres contain up to 2.2 km of Cambrian to Devonian sedimentary rocks, overlying Neoproterozoic sedimentary rocks more than 1.5 km thick. The basin succession thins toward the north, where Cambrian sediments overlie the McArthur Basin sediments in the Beetaloo Sub-basin. Biostratigraphic interpretations of the prospective southern, central and eastern regions of the basin have been revised to reflect the 2012 Geological Time Scale (Gradstein, Ogg, Schmitz, and Ogg, 2012), resulting in an updated chronostratigraphic framework for the basin. The revised biostratigraphic interpretations have implications for important hydrocarbon source rocks. For example, the limestone unit in the southern parts of the basin, generally regarded as the Thorntonia Limestone, is of a different age to the type section for this unit, located in the Undilla Sub-basin. Additionally, the basal hot shale of the Arthur Creek Formation is diachronous across the Dulcie and Toko synclines, which may have ramifications for hydrocarbon exploration. This revised chronostratigraphic framework (by Geoscience Australia) for the Georgina Basin provides a baseline for the first basin-wide assessment of the unconventional hydrocarbon potential of the basin. Abstract prepared for the APPEA 2013 Conference & Exhibition Citation: Smith, T.E., Kelman, A., Laurie, J.R., Nicoll, R.S., Carr, L.K., Hall, L., Edwards, D. 2013. An updated stratigraphic framework for the Georgina Basin, Northern Territory and Queensland. The APPEA Journal 53(2) 487-487, Conference Proceedings, extended abstract and poster. https://doi.org/10.1071/AJ12098

<div>The Adavale Basin underlies the Galilee, Eromanga and Lake Eyre basins in central Queensland and has a sedimentary record spanning the Early Devonian to Late Devonian/Early Carboniferous. A range of depositional environments existed across the Adavale Basin, from dry alluvial plains to restricted marine embayments. The interplay of these environments over time has set up conventional and unconventional hydrocarbon opportunities, including the Gilmore gas discovery. Hydrocarbon and other resource opportunities in the Adavale Basin are a focus of the Australian Government’s Trusted Environmental and Geological Information (TEGI) scientific program. Geoscience Australia (GA) is collaborating with CSIRO to understand areas of future resource potential and provide transparent, trusted baseline data and information to support resource development and better environmental outcomes.&nbsp;</div><div>Seven play intervals are assessed for resource potential in the Adavale Basin. From oldest to youngest, these are the Gumbardo, Eastwood, Log Creek, Lissoy, Cooladdi, Etonvale, and Buckabie sequences, representing distinct palynology-defined chronostratigraphic intervals. A systematic and consistent assessment used the existing thirty-nine petroleum exploration wells and supplemented with sequence stratigraphic data were analysed in the ArcGIS ‘Player’ extension. We identified twenty-five play elements, such as reservoir, seal and charge, and the gross depositional environment interpreted for each play. Well-point maps were used to identify spatial variation in risk for each play element occurring using a split-risking methodology that represented play chance and repeatability. Implicitly, the methodology is data-driven, rather than model-driven, and areas of sparse data results in considerable uncertainty across each play element. The reliance on well information is driven by the sparsity of seismic data across the Adavale Basin. Risk maps for each play were generated to indicate qualitative prospectivity of the Adavale Basin. Composite common risk segment maps of the conventional hydrocarbon prospectivity outline the proven play area around the Gilmore and Log Creek gas accumulations and indicate potential for future discoveries. Two zones of unconventional hydrocarbon play potential have been identified, one around the Gilmore area extending to the northeast and the other further north, centred over the Swaylands-1 exploration well. With further geological, geophysical and environmental information, our methodology and initial results can be used as a tool to assist policy makers to guide and prioritise areas for energy exploration, especially in identifying hydrocarbon and carbon capture and storage opportunities in the Adavale Basin. This Abstract was submitted/presented to the 2022 Central Australian Basins Symposium IV 29-30 August (https://agentur.eventsair.com/cabsiv/).

<div>The Australian Government’s Trusted Environmental and Geological Information (TEGI) program is a scientific program led by Geoscience Australia. Geoscience Australia is collaborating with CSIRO to deliver regional geological and environmental assessments underpinned by transparent, trusted baseline geological and environmental data. The program will initially focus on the north Bowen, Galilee, Cooper and Adavale geological basins, where there is significant local, state and national interest exists to expand resource development. This paper focuses on the compilation and integration of resource and groundwater/surface water data into an environmental assessment framework within the Adavale Basin extended region. The Adavale Basin extended region is the geographic area corresponding to the subsurface Adavale Basin plus a 50 kilometre buffer beyond the basin province boundary. The extended region also includes parts of the overlying Galilee, Eromanga and Lake Eyre geological basins and surficial sediments to encompass groundwater, surface water and ecological assets. The environmental assessment includes a groundwater evaluation that places groundwater data (bore screen depth, groundwater level/pressure, hydrogeochemistry and aquifer yield) from bores and petroleum wells into the context of a regional tectono-stratigraphic framework. Guided by the prevailing depositional environment, the groundwater data were modelled to define key groundwater characteristics. These datasets provide the first fully integrated inter-basin groundwater resource assessment for the Adavale Basin extended region. The Adavale Basin-scale analysis demarcates zones of groundwater recharge and discharge, inter-aquifer connectivity, groundwater salinity, groundwater levels/pressures and aquifer yield to produce a qualitative groundwater conceptual model. The model highlights the groundwater resource potential of the region and will be publicly available in TEGI’s data repository. CSIRO will build a causal network on the basis of this work that assesses potential environmental impacts of resource and associated industrial development. This analysis has far-reaching consequences in defining groundwater flow paths targeted to potential resource development in the Adavale Basin extended region, allowing appropriate identification and management of risk to groundwater resources and other environmental assets applicable to industry, regulators, and other stakeholders. This Abstract was submitted/presented to the 2022 Central Australian Basins Symposium IV 29-30 August (https://agentur.eventsair.com/cabsiv/).