Marine and Land Gravity and Magnetic Data for Southwest Australia

Two new marine geophysical surveys in 2008-2009 acquired about 26,000 line km of gravity and magnetic data off the southwest margin of Australia. This record from Geoscience Australia describes the integration and levelling of this new data with around 150 previous surveys dating back to 1960. The unified dataset is intended for constraining regional tectonics, basin structure, and petroleum prospectivity.

Use Cases

• Modeling regional tectonic structures based on integrated gravity and magnetic data.
• Assessing petroleum prospectivity in offshore basins using pre-competitive geophysical data.
• Conducting geological interpretation of basin structure with levelled ship-track data.
• Analyzing marine geophysical survey artifacts by studying cross-over error corrections.

Strengths

• Integrates about 26,000 line km of new survey data with legacy data from around 150 previous surveys.
• Data has undergone levelling to minimize mistie errors from instrument drift and positioning.
• Covers both offshore and onshore areas of the southwest Australian margin.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to the specific survey areas and historical collection methods.

Provenance

Source

Geoscience Australia, Australian Ocean Data Network

Collection Method

Marine geophysical surveys (GA-310 and GA-2476) acquiring seismic reflection, gravity, magnetic, and swath bathymetry measurements, integrated with historical data.

Time Range

Surveys conducted in late 2008 and early 2009; integrated data includes surveys since 1960.

Freshness

Last updated 2026-06-05 06:54:25.286867; freshness should be verified.

Geography

Southwest margin of Australia, covering the Perth, Mentelle, and Southern Carnarvon basins.