Crustal Mass Deficiency Estimates Across Australia

Variation of crustal mass over the Australian region presents crustal mass deficiency (CMD) calculations for sites across Australia and nearby marine areas. The dataset is derived from seismic refraction survey data on crustal velocities and layer thicknesses, processed by the Australian Ocean Data Network. The metadata indicates a last update in April 2026.

Use Cases

• Model regional isostatic equilibrium using crustal mass deficiency (CMD) values ranging from 13 to 21 kt/m^2.
• Analyze the relationship between CMD, average elevation, and free-air gravity corrections applied at each survey site.
• Map spatial variations in crustal mass from southwest Australia to Queensland using site-specific CMD estimates.
• Compare terrestrial CMD values (13-21 kt/m^2) with marine values (15-17 kt/m^2) to study crustal structure differences.
• Investigate mantle compensation mechanisms by correlating CMD variations with broad-scale gravity field data.

Strengths

• Provides quantified crustal mass deficiency (CMD) values with a defined range (13 to 21 kt/m^2).
• Covers a specific geographic region (Australia and nearby marine areas) for focused analysis.
• Data is derived from established geophysical methods (seismic refraction surveys).

Limitations

• Specific row count, column details, and sample data are unavailable for assessing dataset scale.
• Primary data formats (PDF, HTML) may require extraction to access structured numerical data.
• The description does not specify the number of survey sites or the temporal coverage of the source surveys.

Provenance

Source

Australian Ocean Data Network

Collection Method

Calculated from averages of seismic refraction survey data on crustal velocities and layer thicknesses, with corrections for elevation and gravity.

Time Range

null

Freshness

null

Geography

Australia and nearby marine areas.