Enhanced Gravity and Magnetic Grids for Northern Australia

Geoscience Australia generated a series of gravity and magnetic grids covering three regions of Northern Australia. The dataset includes derivative gravity data for the North-West Shield Western Australia, Northern Territory, and Queensland, and magnetic data for the North-West Shield region. Satellite Free-air gravity data from March 2019 and Topography data from January 2019 were processed using Geosoft Oasis montaj software to produce stitched Bouguer gravity and Total Magnetic Intensity grids.

Use Cases

• Conducting geological analysis based on Total Magnetic Intensity and Bouguer gravity anomalies.
• Performing first-pass interpretation for resource exploration using free-air gravity anomaly images.
• Modeling subsurface structures based on information from deep and shallow magnetic sources.
• Filling offshore data gaps for gravity surveys using derived satellite Bouguer gravity grids.

Strengths

• Covers three distinct geographic regions in Northern Australia.
• Integrates multiple data sources including satellite, ground, airborne, and shipborne surveys.
• Processed using industry-standard Geosoft Oasis montaj software.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

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.

Freshness

Last updated 2026-06-16 19:54:48.497624; 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).