Houtman Sub-basin Geophysical Models for Crustal Structure

Geophysical models integrate 26,000 km of gravity and magnetic data with 2D seismic reflection data to interpret crustal architecture in the Houtman Sub-basin. The study was conducted by Geoscience Australia using data from surveys in 2008-2009 and 2014-2015. Its primary aims are to model sediment thickness, basement composition, and magmatic rock distribution.

Use Cases

• Validate seismic interpretation of Moho depth and top crystalline basement using potential field models.
• Model density variations within the sedimentary section to infer lithology and porosity.
• Interpret basement composition by modeling density and magnetic susceptibility variations.
• Investigate the depth, extent, and thickness of intrabasinal magmatic rocks identified on seismic data.
• Constrain regional tectonics and basin structure using unified gravity and magnetic datasets.

Strengths

• Integrates approximately 26,000 km of gravity and magnetic survey data.
• Combines multiple geophysical datasets (seismic, gravity, magnetic) for a unified interpretation.
• Focuses on a frontier basin with up to 19 km of sediment, offering a detailed structural study.

Limitations

• Data is primarily presented in PDF reports, limiting direct machine-readability and analysis.
• Specific row counts, column schemas, and sample data for the underlying models are unavailable.
• The study area is geographically focused on a single sub-basin, limiting broader regional applicability.

Provenance

Source

Geoscience Australia and the Australian Ocean Data Network.

Collection Method

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

Time Range

Survey data primarily from 2008-2009 and 2014-2015.

Freshness

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Geography

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