Ferromanganese Nodule and Crust Chemistry from Eastern Australian Seabed

Geoscience Australia Data presents chemical and mineralogical data for four ferromanganese samples collected in 2026. The samples, including nodules and crusts up to 20 cm thick, were dredged and cored from the Dampier Ridge and Lord Howe Rise off eastern Australia at depths between 1549 and 2700 meters. The data includes measurements of Mn:Fe ratios and metal content (Ni, Cu, Co) for hydrogenetic deposits.

Use Cases

• Classifying hydrogenetic ferromanganese deposits based on described mineralogical data.
• Analyzing the relationship between water depth and metal enrichment (Ni, Cu, Co, Mn:Fe ratios) as indicated in the description.
• Comparing nodule and crust morphology (mononucleate, polynucleate, laminated) from different seabed substrates.
• Identifying prospective regions for economic nodule exploration based on the described depth and compositional trends.

Strengths

• Data includes specific depth ranges (1549-2700 m) and sample thickness (up to 20 cm).
• Provides quantified chemical ratios (Mn:Fe ratios of 0.48-0.91) and metal content percentages.
• Compares results with samples from other research vessels (Galathea, Tangaroa).

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to the specific sampling stations.

Provenance

Source

Geoscience Australia Data

Collection Method

Samples collected via dredge and core by the West German vessel Sonne.

Time Range

2026

Freshness

Last updated 2026-04-20 01:29:27.923083; freshness should be verified.

Geography

Dampier Ridge and Lord Howe Rise off eastern Australia.