Integrated Gravity and Magnetic Surveys for Southwest Australia Margin

2008-2009 marine surveys GA-310 and GA-2476 acquired about 26,000 line km of new gravity and magnetic data off the southwest margin of Australia. Geoscience Australia integrated this data with legacy information from approximately 150 surveys conducted since 1960. The unified dataset is intended for analyzing regional tectonics and basin structure.

Use Cases

• Model basin structure by analyzing integrated gravity and magnetic anomaly grids.
• Constrain regional tectonics through levelled magnetic data corrected for diurnal effects and instrument drift.
• Assess petroleum prospectivity by interpreting unified potential-field data alongside seismic reflection information.
• Correct for survey artefacts by applying levelling processes to minimize mistie errors at ship-track cross-overs.

Strengths

• Integrates about 26,000 line km of new survey data with legacy data from ~150 surveys.
• Data has been levelled to minimize cross-over errors from positioning and instrument drift.
• Covers a long temporal range, incorporating surveys conducted since 1960.

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 dataset's spatial coverage is limited to the southwest margin of Australia.

Provenance

Source

Australian Ocean Data Network, Geoscience Australia

Collection Method

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

Time Range

1960 to 2009, with new surveys in late 2008 and early 2009.

Freshness

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Geography

Perth, Mentelle, and Southern Carnarvon basins off the southwest margin of Australia.