Marine and Land Gravity and Magnetic Data for Southwest Australia

Southwest Australia's offshore margin is covered by integrated gravity and magnetic data from over 150 marine surveys since 1960, including about 26,000 line km from new surveys GA-310 and GA-2476. Geoscience Australia processed and levelled this data to minimize cross-over errors for regional geological interpretation. The dataset supports analysis of basin structure and petroleum prospectivity.

Use Cases

• Model regional tectonics based on integrated gravity and magnetic data.
• Assess petroleum prospectivity based on basin structure inferred from potential-field data.
• Conduct geological interpretation based on levelled ship-track data designed to minimize cross-over artefacts.

Strengths

• Integrates data from over 150 marine surveys conducted since 1960.
• Includes about 26,000 line km of new gravity and magnetic data from surveys GA-310 and GA-2476.
• Data has been levelled to minimize mistie errors at ship-track cross-overs.

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/temporal bias inherent to data_gov_au.

Provenance

Source

Geoscience Australia Data

Collection Method

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

Time Range

Surveys conducted in late 2008 and early 2009; integrates historical data since 1960.

Freshness

Last updated 2026-04-30 14:16:05.300840; freshness should be verified.

Geography

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