Bremer Sub-basin Seismic Survey Data from Southwest Australia, 2004

Geoscience Australia acquired 2700 km of industry-standard, 106-fold seismic data in late 2004 as part of the Southwest Frontiers Survey. The survey aimed to define basement type and crustal thickness to constrain the tectonic evolution of the region. Refraction data indicated sediment thickness exceeding 9 km and basement velocities of 5.2-5.6 km/s, suggesting a non-granitic composition.

Use Cases

• Improving depth conversion of reflection seismic data based on accurate velocity information.
• Modeling hydrocarbon maturation scenarios based on basement composition and heat production.
• Constraining tectonic evolution interpretations based on estimates of crustal thickness.
• Comparing continental margin structures based on conjugate data from Antarctica.

Strengths

• Includes 2700 km of 106-fold seismic data recorded to 12 seconds two-way time.
• Refraction data supplemented coverage from old sonobuoy work and onshore stations.
• Velocity modeling indicates a maximum sediment thickness in excess of 9 km.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-04-10 16:38:12.654381; freshness should be verified.

Provenance

Source

Geoscience Australia, Australian Ocean Data Network

Collection Method

Acquired via marine reflection seismic survey using a 6-8 km digital streamer and 4900 cui gun array, supplemented by refraction data from sonobuoys and land stations.

Time Range

Late 2004

Freshness

Last updated 2026-04-10 16:38:12.654381

Geography

South-western Australian continental margin, Bremer Sub-basin