4539 meters of marine core were recovered from five sites in the Tasmanian Gateway with a recovery rate of 89%. The Ocean Drilling Program Leg 189 dataset, hosted by the Australian Ocean Data Network, contains upper Maastrichtian to Holocene sedimentary records. The data was collected to investigate the opening of the gateway and its link to the formation of the Antarctic Circumpolar Current and global cooling.
Use Cases
- Modeling paleoceanographic circulation changes based on sediment composition shifts from siliciclastic to carbonate.
- Analyzing microfossil assemblages (palynomorphs, diatoms, nannofossils, foraminifers) for paleoclimate reconstruction.
- Investigating the timing and impact of the Tasmanian Gateway opening on Antarctic ice sheet development.
- Correlating sedimentary unconformities with the onset of major current systems like the Antarctic Circumpolar Current.
Strengths
- 4539 meters of largely continuous core provides a substantial physical record.
- 89% recovery rate indicates a high-quality sampling process.
- The description specifies a clear temporal sequence from the Late Cretaceous to the Holocene.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment for large-scale analysis.
Provenance
- Source
- Ocean Drilling Program (ODP) Leg 189, aggregated by Australian Ocean Data Network.
- Collection Method
- Drilling of five sites in bathyal depths on submerged continental blocks.
- Time Range
- Upper Maastrichtian to Holocene (Late Cretaceous to present).
- Freshness
- Last updated 2026-05-05 01:47:04.482072; freshness should be verified.
- Geography
- Tasmanian Gateway, submerged continental blocks south of Tasmania.