Crustal Transect between Australia and the Timor Trough across the Vulcan Sub-basin

Wide-angle seismic data from ocean bottom seismographs, together with gravity and deep marine reflection profiling data, define crustal-scale features along the Vulcan transect in northern Australia. The dataset, provided by the Australian Ocean Data Network, was last updated on 2026-06-04. It outlines the crustal and upper mantle architecture across the boundary between the Australian and SE Asian plates.

Use Cases

• Modeling crustal thinning from 35 km to 26 km based on seismic and gravity data mentioned in the description
• Investigating the emplacement of mafic intrusive rocks suggested by elevated P-wave velocities of 7 km/s
• Analyzing the thickening of Palaeozoic/Mesozoic basin sequences to 12-13 km across the continental margin
• Interpreting mid-crustal detachment structures from strong near-vertical-incidence reflections at about 13 km depth

Strengths

• Integrates multiple geophysical data types: wide-angle seismic, gravity, and deep marine reflection profiling
• Provides specific crustal thickness measurements, such as 35 km near the Yampi Shelf and 26 km under the outer shelf
• Includes interpretations of geological features like basin sequences thickening to 12-13 km

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect geographic bias inherent to data_gov_au, focusing on a specific transect in northern Australia

Provenance

Source

Australian Ocean Data Network

Collection Method

Wide-angle seismic data from ocean bottom seismographs, together with gravity and deep marine reflection profiling.

Freshness

Last updated 2026-06-04 05:47:38.872306; freshness should be verified

Geography

Vulcan transect in northern Australia, between the Precambrian Australian craton and the Timor Trough.