Northern Australia Geochemical Mineralogy and Cation Exchange Data

836 bulk sediment samples from Northern Australia were analyzed for mineral content and cation exchange capacity. Geoscience Australia conducted this work as part of the ADARER project to accelerate rare earth element discovery. The data release includes mineral identification, quantification, and clay speciation results.

Use Cases

• Predict rare earth element potential by correlating mineral quantification data with known REE-bearing mineral signatures.
• Classify sediment weathering intensity using clay mineral identification and halloysite content estimation features.
• Model soil cation exchange capacity (CEC) based on bulk mineralogy and clay speciation data.
• Map geochemical provinces by integrating mineral identification results with the sample's spatial location.

Strengths

• 836 field-collected bulk samples provide a substantial sample set for analysis.
• Data includes three distinct analytical results: bulk mineral quantification, clay mineral identification, and CEC measurements.
• Analysis performed by specialized external contractors (Sietronics, ALS Global) with detailed methodology reports.

Limitations

• Sample size is limited to Northern Australia, introducing geographic bias for national-scale models.
• Unknown data completeness for all 836 samples across all measured features (mineral ID, clay ID, CEC).
• Temporal coverage of sample collection is not specified, limiting time-series analysis.

Provenance

Source

Geoscience Australia Data.

Collection Method

Field-collected sediment samples analyzed via X-ray diffraction (XRD) for mineralogy and laboratory tests for cation exchange capacity.

Freshness

Data release was last updated in April 2026.

Geography

Northern Australia.