Lord Howe Rise Seismic Profiles from Eastern Gondwana Breakup

Processed pre-stack depth-migrated seismic reflection images cover a regional, approximately 900 km long east-west profile at 27.2°S. The dataset includes grids of pre-stack time-migrated lines covering two rift basins on the Lord Howe Rise, revealing syn-rift and post-rift sedimentary sequences. Data was collected during a 2016 marine geophysical survey and presented by the Australian Ocean Data Network.

Use Cases

• Analyze seismic reflection profiles to map the depth and structure of rift basins up to 3.5 km thick.
• Interpret pre-stack depth-migrated images to identify unconformities separating syn-rift and post-rift strata.
• Compare normal faulting patterns within syn-rift sequences across two contrasting rift basins on the Lord Howe Rise.
• Correlate bathymetry data with seismic images to study the sharp eastern boundary of the Tasman Basin against the Dampier Ridge.
• Use the ~900 km long seismic profile to constrain the transition from oceanic Tasman Basin crust to extended continental crust of the Lord Howe Rise.

Strengths

• Includes a long, regional seismic profile spanning approximately 900 km.
• Contains processed pre-stack depth-migrated and time-migrated seismic reflection images.
• Data reveals specific geological features like rift basins up to 3.5 km thick and an unconformity.

Limitations

• Sample size and specific row/column counts for the seismic data grids are unknown.
• Data is from a single survey in 2016, providing a snapshot rather than time-series analysis.
• Geographic coverage is limited to a specific transect at 27.2°S and two selected rift basins.

Provenance

Source

Australian Ocean Data Network

Collection Method

Collected via multi-channel seismic reflection and bathymetry on a multi-leg marine geophysical survey.

Time Range

Survey conducted in 2016.

Freshness

null

Geography

Lord Howe Rise, Tasman Basin, and Dampier Ridge offshore eastern Australia, centered on a profile at 27.2°S.