Lord Howe Rise Marine Seismic and Bathymetry Survey

A 680-kilometer east-west seismic refraction profile and approximately 600 km of high-resolution 2D reflection data were collected aboard the R/V Kairei in 2016. The dataset, acquired by JAMSTEC and Geoscience Australia, includes multibeam bathymetry, gravity, and magnetic data to study the structure of this continental ribbon. Preliminary results from the 2016 Seismological Society of Japan meeting image rift-fill sediments and basement across several basins.

Use Cases

• Model crustal thickness and type by analyzing Moho reflections (PmP) and mantle arrivals (Pn) from ocean-bottom seismometer data.
• Map sedimentary basin geometry and acoustic basement using multi-channel seismic reflection profiles across the Dampier Ridge and Middleton Basin.
• Correlate gravity and magnetic anomalies with seismic interpretations to constrain the nature of basement, varying from oceanic to thin continental crust.
• Support IODP drilling site selection by integrating high-resolution 2D seismic reflection data from seven candidate locations.

Strengths

• Data includes a 680 km long seismic refraction profile with ~100 ocean-bottom seismometers.
• Approximately 600 km of high-resolution 2D seismic reflection data supports detailed basin analysis.
• Multimodal dataset combines seismic, bathymetry, gravity, and magnetic data for a unified interpretation.

Limitations

• Dataset size, row counts, and specific file formats beyond PDF/HTML are not provided.
• Data represents a single survey from 2016, limiting temporal analysis of geological processes.
• Preliminary results are presented; full processed models and raw data accessibility are unclear.

Provenance

Source

Australian Ocean Data Network, from a JAMSTEC and Geoscience Australia collaboration.

Collection Method

Acquired via marine survey onboard the JAMSTEC vessel R/V Kairei using seismic refraction, reflection, bathymetry, gravity, and magnetic instruments.

Time Range

Survey conducted March–May 2016.

Freshness

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Geography

Lord Howe Rise, east of Australia, covering the Tasman Sea, Dampier Ridge, Middleton, Capel and Faust basins, and Lord Howe Platform.