Integrated Gravity and Magnetic Data for Southwest Australia Margin

Gravity and magnetic data from marine and land surveys covering the southwest margin of Australia. The dataset integrates approximately 26,000 line kilometers of new survey data with legacy data from around 150 previous surveys dating back to 1960. Geoscience Australia compiled this unified dataset to support regional geological analysis.

Use Cases

• Model regional tectonics by analyzing integrated gravity and magnetic anomaly patterns.
• Assess basin structure for petroleum exploration using levelled ship-track gravity measurements.
• Constrain geological interpretations by merging new marine magnetic data with legacy onshore surveys.
• Correct for cross-over errors in gridded data by applying the documented levelling process to ship-track lines.

Strengths

• Integrates approximately 26,000 line kilometers of new gravity and magnetic survey data.
• Combines new data with legacy information from around 150 historical marine surveys.
• Data has undergone levelling to minimize mistie errors at ship-track cross-overs.

Limitations

• Specific row counts, column details, and sample data are unavailable.
• Primary file formats are PDF and HTML, which may require extraction for computational analysis.
• The temporal coverage of the integrated legacy data is broad (since 1960), which may introduce consistency challenges.

Provenance

Source

Geoscience Australia, conducted under the Australian Government's Offshore Energy Security Program.

Collection Method

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

Time Range

New surveys in late 2008 and early 2009; integrated legacy data spans from 1960 onwards.

Freshness

Record was last updated in April 2026, but the core survey data is from 2008-2009 and earlier.

Geography

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