Integrated Gravity and Magnetic Data for Southwest Australia's Offshore Basins

Geoscience Australia integrated and levelled gravity and magnetic data from two new marine surveys (GA-310 and GA-2476) with approximately 150 historical surveys. The unified dataset, created to support regional tectonic and petroleum prospectivity studies, includes about 26,000 line km of new data. The processing focused on minimising cross-over errors from ship-track data to produce interpretable grids.

Use Cases

• Modeling regional tectonic structures based on integrated gravity and magnetic data.
• Assessing petroleum prospectivity in offshore basins using levelled potential-field datasets.
• Constraining basin architecture by interpreting unified gravity and magnetic grids.

Strengths

• Integrates data from approximately 150 historical marine surveys conducted since 1960.
• Adds about 26,000 line km of new gravity and magnetic data from two dedicated surveys.
• Data has undergone levelling to minimise cross-over errors for improved interpretability.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to the survey history of the region.

Provenance

Source

Geoscience Australia Data

Collection Method

Marine geophysical surveys (seismic reflection, gravity, magnetic, swath bathymetry) and integration with historical data.

Time Range

Surveys conducted in late 2008 and early 2009; historical data dates back to 1960.

Freshness

Last updated 2026-04-20 02:40:27.085881; freshness should be verified.

Geography

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