The McArthur Basin Bulletin describes mid-Proterozoic sedimentary rocks forming a platform cover sequence near the eastern edge of the North Australian Craton. The sequence in the southern half of the basin is divided into four stratigraphic groups, including the Tawallah Group (about 4500 m thick) and the McArthur and Nathan Groups (combined thickness about 5500 m). The Australian Ocean Data Network hosts this geological bulletin.
Use Cases
- Analyze basin structure based on descriptions of the Batten Fault Zone and half-graben geometry.
- Study stratigraphic sequences based on the four described groups (Tawallah, McArthur, Nathan, Roper) and their unconformities.
- Investigate depositional environments based on descriptions of shallow water, peritidal, lagoonal, lacustrine, and fluvial settings.
- Research mineral resources based on mentions of copper-bearing breccia pipes and iron formations.
- Model paleoclimate based on evidence of arid climates, including evaporite pseudomorphs and desiccation features.
Strengths
- The description provides specific thickness measurements for stratigraphic groups, such as the Tawallah Group (about 4500 m) and the McArthur and Nathan Groups (combined thickness about 5500 m).
- It includes a specific U-Pb age date for tuffs in the McArthur Group (1690125 Ma).
- The bulletin details structural features like the Batten Fault Zone and estimates sedimentary rock thickness (up to perhaps 12 km).
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- The data format is HTML/PDF, which may require extraction for quantitative analysis.
Provenance
- Source
- Australian Ocean Data Network
- Time Range
- Mid-Proterozoic geological period.
- Freshness
- Last updated 2026-04-16 16:20:50.837866; freshness should be verified.
- Geography
- Southern McArthur Basin, Northern Territory, Australia.