Tasmanian Transform Margin Basement Architecture from Aeromagnetic and Seismic Data

Aeromagnetic and seismic reflection data from the Australian Ocean Data Network reveals the basement architecture and formation history of an ocean-continent transform boundary off western Tasmania. The dataset maps reactivated structures like the Avoca-Sorell fault system and deep sedimentary basins, comparing them to other global transform margins. It was last updated in April 2026.

Use Cases

• Map the orientation and lateral extent of the Avoca-Sorell fault system using NW- to NE-trending aeromagnetic anomalies.
• Identify deep sedimentary basins and basement highs adjacent to the transform margin using seismic reflection profiles.
• Correlate offshore aeromagnetic anomalies with known onshore basement geology to understand tectonic continuity.
• Analyze the distribution of granite volumes and Mesoproterozoic lower crust within rotated pre-rift crustal blocks.

Strengths

• Integrates high-resolution aeromagnetic data with seismic reflection profiles for detailed structural mapping.
• Enables correlation of offshore magnetic anomalies with onshore geological units, providing tectonic context.

Limitations

• Specific data volume (row count, file size) and column details are unknown.
• The dataset's primary format is HTML, which may not be directly machine-readable for analysis.
• Temporal coverage of the underlying data collection is not specified.

Provenance

Source

Australian Ocean Data Network.

Collection Method

Combined analysis of seismic reflection profiles and recently acquired high-resolution aeromagnetic data.

Time Range

Covers geological history from late Neoproterozoic-Cambrian to Cenozoic, but specific data collection dates are null.

Freshness

Last updated in April 2026.

Geography

Ocean-continent transform boundary off the western coast of Tasmania, Australia.