Geochemical Characterization of Northern Lord Howe Rise Sediments

A geochemical dataset characterizes deep-sea floor sediments from 1300 to 2423 meters water depth on the northern Lord Howe Rise and Gifford Guyot off eastern Australia. The Australian Ocean Data Network published this synthesis, analyzing sediment mineralogy, organic carbon, nitrogen, isotopes, and major/trace elements to support habitat and biodiversity inferences. The data was last updated in April 2026.

Use Cases

• Model relationships between sediment mineralogy and major element concentrations to infer seabed composition.
• Analyze organic carbon and nitrogen isotopic compositions as proxies for organic matter sources and cycling.
• Use chlorin indices and acid-extractable element concentrations to assess organic matter reactivity and trace element bioavailability.
• Correlate geochemical parameters like carbon content and trace elements with physical depth data for habitat classification.

Strengths

• Data covers a specific depth range from 1300 to 2423 meters.
• Includes multiple analytical dimensions: mineralogy, organic geochemistry, and elemental concentrations.

Limitations

• Sample size and number of sampling locations are unknown.
• Data is presented as a regional synthesis, which may limit site-specific granularity.

Provenance

Source

Australian Ocean Data Network.

Collection Method

Analysis of surface sediment samples collected from a deep-sea plateau and seamount.

Freshness

Last updated in April 2026.

Geography

Lord Howe Rise and Gifford Guyot off eastern Australia.