The Australian Ocean Data Network provides a dataset on crustal mass deficiency (CMD) across Australia and nearby marine areas, derived from seismic refraction surveys. The data includes CMD values ranging from about 13 to 21 kt/m² on land and 15 to 17 kt/m² in marine regions, calculated by applying corrections for elevation and free-air gravity to a standard crustal column. The dataset was last updated on 2026-06-05.
Use Cases
- Modeling regional isostatic compensation based on crustal mass deficiency (CMD) values.
- Analyzing the relationship between crustal density-depth structure and free-air gravity anomalies.
- Mapping crustal mass variations to understand tectonic and geological history across Australia.
Strengths
- CMD values are provided with specific ranges: 13-21 kt/m² on land and 15-17 kt/m² in marine areas.
- Data is derived from seismic refraction surveys, which provide direct measurements of crustal velocities and layer thicknesses.
- Methodology is described, including 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.
- Data files are in PDF and HTML formats, which may require extraction for computational analysis.
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 2026-06-05 06:26:29.922664; freshness should be verified.
- Geography
- Australia and nearby marine areas