Enhanced Gravity and Magnetic Grids for Northern Australia

Geoscience Australia generated gravity and magnetic grids covering Northern Australia, including specific regions of Western Australia, the Northern Territory, and Queensland. The data integrates satellite-derived gravity from March 2019 and topography from January 2019 with ground and airborne survey data. Standard datasets include Total Magnetic Intensity, Reduction to the Pole, Free-air, and Bouguer gravity anomalies.

Use Cases

• First-pass geological interpretation based on free-air gravity anomaly images.
• Gravity modeling using processed Bouguer gravity anomaly grids.
• Analysis of magnetic basement structure and composition based on Total Magnetic Intensity data.
• Mapping shallow magnetic sources like volcanics and intrusions using magnetic anomaly data.

Strengths

• Data covers three distinct geographic regions: North-West Shield Western Australia, Northern Territory, and Queensland.
• Integrates multiple data sources: satellite gravity (v27.1), satellite topography (v19.1), ground surveys, and airborne surveys.
• Includes standard processed datasets: Total Magnetic Intensity, Reduction to the Pole, Free-air, and Bouguer gravity anomalies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Magnetic dataset coverage is limited to the North-West Shield Western Australia region.

Provenance

Source

Geoscience Australia (GA) and Scripps Institution of Oceanography (SIO)/NOAA/U.S. Navy/NGA.

Collection Method

Data processed and enhanced using Geosoft Oasis montaj software, integrating satellite data and survey data.

Time Range

Satellite gravity data released March 2019, topography data released January 2019.

Freshness

Last updated 2026-05-05 05:19:31.744370; freshness should be verified.

Geography

Northern Australia, including regions approximately between latitudes 7–30⁰ S and longitudes 110–160⁰ E.