The Australian Ocean Data Network provides a geological dataset of rock samples dredged from the northern Macquarie Ridge (47°-48° S) in the Southern Ocean. The collection includes altered basalt, dolerite, gabbro, and sedimentary rocks, with petrographic and geochemical analysis indicating MORB-like affinity. The data was last updated on 2026-06-27.
Use Cases
- Classifying rock types and petrological affinity based on the described geochemical and petrographic analysis.
- Modeling the geological relationship between the northern Macquarie Ridge and the broader ridge system based on sample similarity.
- Analyzing sediment provenance to distinguish between oceanic ridge and continental New Zealand sources.
- Investigating regional tectonic settings by assessing the absence of subduction-related magmatism mentioned in the description.
Strengths
- Samples were collected from a previously unsampled portion of the Macquarie Ridge, providing new data.
- Includes both igneous (altered basalt, dolerite, gabbro) and sedimentary rock types.
- Data is associated with a specific geographic coordinate range (47°-48° S).
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Dredging from the seafloor using the commercial fishing vessel Amaltal Explorer.
- Time Range
- null
- Freshness
- Last updated 2026-06-27 17:15:51.691369; freshness should be verified.
- Geography
- Northern Macquarie Ridge, Southern Ocean (47°-48° S)