Rock Samples Dredged from the Northern Macquarie Ridge, Southern Ocean

A geological note describes altered basalt, dolerite, and gabbro dredged from a previously unsampled portion of the Macquarie Ridge (47°-48° S). The rocks were collected using the commercial fishing vessel Amaltal Explorer and are petrographically and geochemically similar to suites found further south. The data is provided by the Australian Ocean Data Network and was last updated in April 2026.

Use Cases

• Classifying rock petrology and geochemistry based on the described igneous rock types.
• Analyzing geological relationships between oceanic ridges and continental shelves based on the described provenance.
• Investigating the absence of subduction-related magmatism in a specific tectonic region.

Strengths

• Data covers a previously unsampled portion of the Macquarie Ridge (47°-48° S).
• Rocks are described with petrographic and geochemical similarity to known suites.
• The note provides a clear geological interpretation linking the ridge's northern and southern parts.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The primary data format is PDF/HTML, which may require extraction for computational analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Dredged samples collected using the commercial fishing vessel Amaltal Explorer.

Time Range

null

Freshness

Last updated 2026-04-10 19:39:15.032690; freshness should be verified.

Geography

Northern Macquarie Ridge, Southern Ocean (47°-48° S), Puysegur Bank.