Enhanced Gravity and Magnetic Grids for Northern Australia

Northern Australia is covered by a series of processed gravity and magnetic grids, including derivative datasets for the North-West Shield of Western Australia, the Northern Territory, and Queensland. Geoscience Australia generated the data by stitching together satellite, airborne, ground, and shipborne survey data, processed with Geosoft Oasis montaj software. The collection includes Free-air and Bouguer gravity anomalies, Total Magnetic Intensity, and Reduction to the Pole grids.

Use Cases

• Conducting first-pass geological interpretation based on free-air gravity anomaly images.
• Modelling subsurface structures using terrain-corrected Bouguer gravity anomalies.
• Analyzing magnetic basement composition and shallow magnetic sources using Total Magnetic Intensity and Reduction to the Pole grids.
• Filling offshore data gaps for regional studies using the derived satellite Bouguer gravity grid.

Strengths

• Data covers three defined regions in Northern Australia with specific latitude and longitude bounds.
• Integrates multiple data sources including satellite data from SIO/NOAA/NGA and GA's ground/airborne surveys.
• Includes standard processed datasets for geological analysis like Bouguer gravity, TMI, and RTP grids.

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.
• Magnetic data is available only for the North-West Shield Western Australia region, not the entire area.

Provenance

Source

Geoscience Australia Data

Collection Method

Data was generated by stitching and processing satellite, airborne, ground, and shipborne survey data using Geosoft Oasis montaj software.

Freshness

Last updated 2026-03-25 18:37:35.773429; freshness should be verified.

Geography

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