f9bca492-e667-4d65-8126-4592127aa3a9 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T11:24:32 creation ISO 19115 2016 The gravity field of the Australian basement f9bca492-e667-4d65-8126-4592127aa3a9 The Australian gravity field is analysed to determine whether the basement differs between regions of exposed basement and of covered basement (sedimentary basins). When the thickness of cover is allowed for, there is no systematic change in gravity variability from exposed to covered basement regions and the pattern of density differences is inferred to be similar in the two basement types. With one exception the trends of the gravity anomalies are continuous from covered to exposed basement regions; therefore geological structure and rock formations in the basement are considered to be continuous between the two kinds of regions. After making allowance for altitude and the effects of cover beds, the covered basement is calculated to have gravity anomalies that average 5 mGal less than the exposed basement. This gravity difference is probably caused by the two kinds of basement not being isostatically balanced relative to each other, rather than the basements having a different average density. No major differences between exposed and covered basement are apparent. It is likely that the two basement types have a similar history of formation, and consequently similar mineral potential. {"type": "Polygon", "coordinates": [[[110.0, -44.0], [156.0, -44.0], [156.0, -9.0], [110.0, -9.0], [110.0, -44.0]]]} 110.0 156.0 -44.0 -9.0 AUS Earth Sciences GA Publication Journal Published_External Journal article (pdf) documentDigital Journal article (pdf) PDF Unnamed resource documentDigital HTML