Seismic refraction surveys in Australia and nearby marine areas provide data on crustal velocities and layer thicknesses. The averages of these at various places have been used to estimate a density-depth structure and calculate a crustal mass deficiency (CMD) for each site. The CMD ranges from about 13 kt/m^2 in the south-west of the continent to about 21 in parts of Queensland, with marine values from 15 to 17 kt/m^2.
Use Cases
- Modeling crustal density-depth structure based on seismic refraction survey averages
- Analyzing regional isostatic equilibrium based on calculated crustal mass deficiency (CMD) values
- Investigating mantle compensation mechanisms based on gravity field and CMD variations
- Mapping crustal mass variations across Australia and its marine areas
Strengths
- CMD values are provided with specific ranges (13-21 kt/m^2 for continent, 15-17 kt/m^2 for marine)
- Data derived from seismic refraction surveys, a standard geophysical method
- Includes corrections for average elevation and free-air gravity
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment
- Freshness should be verified; last updated date is 2026-04-16
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Calculated from averages of seismic refraction survey data on crustal velocities and layer thicknesses
- Freshness
- Last updated 2026-04-16 15:35:53.356924
- Geography
- Australia and nearby marine areas