From Geoscience Australia
JSON RDF ISO19115-3 XML

Australian radiogenic granite and sedimentary basin geothermal hot rock potential map

Created 20/01/2025

Updated 20/01/2025

JSON RDF ISO19115-3 XML

The hot rock geothermal model in the Australian context comprises high-heat producing granites overlain by thick accumulations of low-thermal conductivity sediments. The granites have low concentrations of radiogenic elements, and over hundreds of millions of years, these elements decay and produce heat. The passage of this heat to the Earth's surface via upwards conduction is slowed by layers of sediments that have low thermal conductivity, creating 'hot spots' beneath the blankets. This thematic map shows granites attributed by heat production and basin depth. The majority of the granites depicted are of surface outcrop. The presence of high-heat producing granites adjacent to deep sedimentary basins may be used as a first-order indicator of where to further investigate the possibility of hot rock geothermal plays. The main frame of the map shows all granites (attributed by calculated heat production - where available), sedimentary basins (and their order e.g. where one basin is overlapped by another) and geothermal licences and applications. The top right inset map shows only those granites with a calculated radiogenic heat generation of >5 uW -3, with the depth of the sedimentary basins. This map provides a rapid view of areas that may be expected to have the greatest hot rock potential. The second-from-top inset map shows all suitable geochemical analyses from OZCHEM, attributed by calculated radiogenic heat generation. This shows both the distribution of data that goes into attributing the granite polygons, and also analyses of granites (and other rocks) that fall outside the mapped granite polygons that are otherwise excluded from the main map. The third-from-top inset map shows the distribution of drillholes with temperature measurements. The bottom inset map shows an image of the Austherm07 database, which is derived from the drillhole temperature information. The image shows the projected temperature of the crust at a depth of 5 kilometres, interpolated between the drillholes. Overlain on this image is the small number of publicly-available heat flow data.

Files and APIs

Tags

Additional Info

Field Value
Title Australian radiogenic granite and sedimentary basin geothermal hot rock potential map
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/5f995cfd-6412-411e-8981-35f1c81ff0e3
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[110.0, -45.0], [155.0, -45.0], [155.0, -9.0], [110.0, -9.0], [110.0, -45.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Australian radiogenic granite and sedimentary basin geothermal hot rock potential map". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/australian-radiogenic-granite-and-sedimentary-basin-geothermal-hot-rock-potential-map

Original dataset
Dataset copies

No duplicate datasets found.