Great Australian Bight Deep-Seismic Crustal Transects Proposal

Geoscience Australia proposes a marine survey to acquire 4087 km of deep-seismic data across the Great Australian Bight and southern Western Australian margin. The data aims to define deep crustal structure, locate the continent-ocean boundary, and support petroleum exploration, Ocean Drilling Program proposals, and Law of the Sea claims. The proposal references legacy seismic refraction data from 1976.

Use Cases

• Interpret deep crustal structure and key detachment surfaces from 16-second record length seismic data to model margin formation.
• Analyse seismic transects to determine the location and structural setting of the continent-ocean boundary (COB).
• Investigate the structure and origin of the Diamantina Zone using seismic data to assess its relationship to seafloor spreading rate changes.
• Use the acquired framework data to support a specific proposal for drilling in the GAB submitted to the Ocean Drilling Program (ODP).

Strengths

• Proposes acquisition of 4087 km of new deep-seismic data.
• Specific scientific aims target fundamental geological questions about margin structure and evolution.
• Integrates with legacy seismic refraction data recorded in 1976 for enhanced interpretation.

Limitations

• Dataset is a proposal document; the described seismic data is not yet collected or available.
• No sample data, column definitions, or tabular data structure is provided.
• Primary content is in HTML and PDF formats, not structured for direct computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Proposed acquisition via the AGSO research vessel Rig Seismic.

Time Range

null

Freshness

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Geography

Central Great Australian Bight and continental margin south of Western Australia.