Enhanced Gravity and Magnetic Grids for Northern Australia

Geoscience Australia generated a series of gravity and magnetic grids covering Northern Australia. The data includes derivative gravity datasets for the North-West Shield Western Australia, Northern Territory, and Queensland, and a magnetic dataset for the North-West Shield region. Satellite Free-air gravity and Topography data from Scripps Institution of Oceanography were used, processed with 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 data.
• Gravity modeling based on processed Bouguer gravity grids.
• Analysis of magnetic basement structure based on Total Magnetic Intensity and Reduction to the Pole grids.
• Identifying shallow magnetic sources like volcanics or intrusions based on magnetic anomaly data.

Strengths

• Covers three specific regions of Northern Australia with defined latitude and longitude bounds.
• Integrates multiple data sources including satellite data from SIO/NOAA/NGA and ground/airborne surveys from Geoscience Australia.
• Data processing and enhancement were performed 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.
• The magnetic dataset is limited to the North-West Shield Western Australia region.

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, processed and stitched using Geosoft Oasis montaj.

Time Range

Satellite data releases referenced are from 2019 (Free-air gravity v27.1, Topography v19.1).

Freshness

Last updated 2026-06-23 03:30:09.119368; freshness should be verified.

Geography

Covers 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).