Enhanced Gravity and Magnetic Grids for Northern Australia from Geoscience Australia

Geoscience Australia generated a series of gravity and magnetic grids covering three regions of Northern Australia: the North-West Shield of Western Australia, the Northern Territory, and Queensland. The data integrates satellite-derived Free-air gravity and Topography data from Scripps Institution of Oceanography with onshore ground, airborne, and shipborne survey data. Processing and enhancement were performed using Geosoft Oasis montaj software to create stitched Bouguer gravity and Total Magnetic Intensity grids.

Use Cases

• First-pass geological interpretation based on free-air gravity anomaly images mentioned in the description.
• Gravity modeling based on the processed Bouguer gravity anomaly data.
• Analysis of magnetic basement structure and composition based on Total Magnetic Intensity (TMI) data.
• Identification of shallow magnetic sources like volcanics or intrusions based on magnetic anomaly information.

Strengths

• Data covers three defined geographic regions in Northern Australia with specified latitude and longitude ranges.
• Integrates multiple data sources including satellite data from SIO/NOAA/NGA and ground/airborne/shipborne surveys from Geoscience Australia.
• Includes standard processed datasets for geological analysis: Free-air, Bouguer, Total Magnetic Intensity, and Reduction to the Pole anomalies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• The magnetic dataset is available only for the North-West Shield Western Australia region, not for the Northern Territory or Queensland.

Provenance

Source

Geoscience Australia, Scripps Institution of Oceanography (SIO), National Oceanic and Atmospheric Administration (NOAA), U.S. Navy, National Geospatial-Intelligence Agency (NGA).

Collection Method

Data downloaded from the Geophysical Archive Data Delivery System (GADDS) and SIO Satellite Geodesy website, then processed and stitched using Geosoft Oasis montaj software.

Freshness

Last updated 2026-06-27 16:19:30.407199; freshness should be verified.

Geography

Northern Australia, specifically the North-West Shield Western Australia (7–26° S, 110–130° E), Northern Territory (7–26° S, 125.5–141° E), and Queensland (7–30° S, 135–160° E).