Ocean Drilling Program Leg 189 recovered 4539 meters of marine sediment core from five sites in the Tasmanian Gateway, with an 89% recovery rate. The dataset, hosted by the Australian Ocean Data Network, contains upper Maastrichtian to Holocene records used to study the opening of the gateway and its climatic effects. The sedimentary sequence includes shallow marine mudstones, glauconitic siltstones, and pelagic carbonates.
Use Cases
- Modeling the timing and impact of the Tasmanian Gateway opening based on sediment core stratigraphy.
- Analyzing microfossil assemblages (palynomorphs, diatoms, nannofossils, foraminifers) for paleoclimate reconstruction.
- Studying the transition from siliciclastic to carbonate sedimentation linked to oceanic circulation changes.
Strengths
- 4539 meters of core recovered with an 89% recovery rate.
- The record spans from the upper Maastrichtian to the Holocene, providing a long-term geological perspective.
- Cores were taken from five distinct bathyal depth sites, allowing for spatial comparison.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data may reflect geographic and temporal bias inherent to the specific drilling locations.
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Core samples drilled by the Ocean Drilling Program (ODP) Leg 189.
- Time Range
- Upper Maastrichtian to Holocene
- Freshness
- Last updated 2026-06-27 19:58:23.157476; freshness should be verified.
- Geography
- Tasmanian Gateway, submerged continental blocks south of Tasmania