Houtman Sub-basin Geophysical Modelling Study of Crustal Architecture and Magmatic Rocks

The Houtman Sub-basin geophysical modelling study is an integrated geological and geophysical interpretation of the GA-349 seismic survey. It incorporates about 26,000 km of gravity and magnetic data from surveys GA-310 and GA-2476, aiming to improve understanding of crustal architecture and magmatic rock distribution. The study was conducted by Geoscience Australia and aggregated by the Australian Ocean Data Network.

Use Cases

• Validate seismic interpretations of crustal structure based on potential field modelling.
• Model density variations within the sedimentary section to assess petroleum prospectivity.
• Investigate the depth and extent of intrabasinal magmatic rocks identified on seismic data.
• Constrain regional tectonics and basin structure using unified gravity and magnetic datasets.

Strengths

• Integrates about 26,000 km of new gravity and magnetic data from dedicated marine surveys.
• Focuses on a frontier basin with up to 19 km of sediment, providing a detailed geological target.
• Uses new 2D seismic reflection data (GA-349) obtained in 2014/15 for re-assessment.

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 bias inherent to data_gov_au, focusing on a specific Australian offshore basin.

Provenance

Source

Geoscience Australia, Australian Ocean Data Network

Collection Method

Integrated interpretation of seismic, gravity, and magnetic survey data.

Time Range

Surveys conducted in 2008, 2009, and 2014/15.

Freshness

Last updated 2026-06-23 00:47:36.103783; freshness should be verified.

Geography

Houtman Sub-basin, northern Perth Basin, western margin of Australia.