grav
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This grid represents gravity anomalies of the Australian region. The grid combines accurate onshore gravity measurements, with satellite data over the offshore region. The cell values represent simple Bouguer anomalies at a density of 2.67 tonnes per cubic metre onshore and free-air anomalies offshore. The grid cell size is 0.5 minutes of arc, which is equivalent to about 800 metres.
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Between October 2008 and February 2009, Geoscience Australia undertook two major surveys off the coast of Western Australia. Areas of interest included the Mentelle and northern Perth Basins, the Southern Carnarvon Basin, the southern Exmouth Sub-basin (Northern Carnarvon Basin) and the Wallaby Plateau. These surveys collected a range of data, including industry-standard seismic reflection data and gravity and magnetic data. In addition to the new data collected, Geoscience Australia has reprocessed existing open file 2D seismic data within the survey area. These data are available for purchase. Please complete the order form on the downloadable information sheet and return to Geoscience Australia.
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