5028 Block 2 (Southeast) Grid of Total Magnetic Intensity (TMI) with Standard Reductions

Total magnetic intensity (TMI) data measures variations in the Earth's magnetic field caused by rock-forming minerals. The grid has a cell size of approximately 20 meters, with units in nanoTesla, and was acquired in 2024 by the WA Government, consisting of 415,090 line-kilometres of data. The processed data is checked for quality by Geoscience Australia geophysicists to ensure it is fit-for-purpose.

Use Cases

• Map subsurface geological structures based on magnetic anomaly patterns.
• Identify mineral resources by analyzing contrasts in magnetic susceptibility of rocks.
• Support regional geological mapping and interpretation efforts based on processed magnetic intensity data.

Strengths

• Data acquisition involved 415,090 line-kilometres of flight lines, indicating a substantial survey effort.
• The data has undergone standard processing and quality checks by GA geophysicists to ensure it is fit-for-purpose.
• The grid has a high spatial resolution with a cell size of approximately 20 meters.

Limitations

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

Provenance

Source

Geoscience Australia Data

Collection Method

Acquired via airborne survey by the WA Government.

Time Range

2024

Freshness

Last updated 2026-05-14 03:42:58.260351; freshness should be verified.

Geography

5028 Block 2 (Southeast), Australia