Altered basalt, dolerite, and gabbro were collected from a previously unsampled section of the Macquarie Ridge between 47° and 48° S. These rocks are petrographically and geochemically similar to MORB-like suites found further south, linking the northern ridge geologically to the rest of the feature. The dataset, provided by the Australian Ocean Data Network, includes dredged sedimentary rocks derived from both oceanic ridge and continental New Zealand sources.
Use Cases
- Classify rock types based on petrographic and geochemical descriptions mentioned in the description.
- Analyze the geological relationship between the northern Macquarie Ridge and the New Zealand continental shelf based on sample provenance.
- Investigate the absence of subduction-related magmatism along the ridge based on the rock composition data.
- Compare MORB-like petrological affinities of samples from different latitudes along the Macquarie Ridge.
Strengths
- Samples were collected from a previously unsampled portion of the Macquarie Ridge.
- Rocks are described with petrographic and geochemical similarity to known suites.
- Data provenance includes specific geographic coordinates (47°-48° S).
Limitations
- Row count and sample size are unknown, which may limit suitability assessment.
- Column-level documentation is absent; field semantics must be inferred after download.
- Data is presented in HTML and PDF formats, which may require extraction for analysis.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Dredged using the commercial fishing vessel Amaltal Explorer.
- Freshness
- Last updated 2026-04-16 08:49:03.565977; freshness should be verified.
- Geography
- Northern Macquarie Ridge, Southern Ocean (47°-48° S).