The River Supersequence is a 15-million-year stratigraphic unit from the Proterozoic Isa Superbasin, reaching a maximum thickness of 3300 meters on the central Lawn Hill Platform. It comprises eight 3rd-order sequences of fine-grained siliciclastics and mixed carbonate-siliciclastics, with documented lowstand deposits including fluvial channels, shoreface settings, and turbidites. This dataset, published by Geoscience Australia, describes facies distributions, syndepositional faulting, and base-metal mineralisation associated with this dynamic basin period.
Use Cases
- Modeling basin evolution and accommodation cycles based on described 2nd- and 3rd-order sequences.
- Analyzing facies distributions and depositional environments like shoreface and turbiditic sub-basins.
- Studying the impact of syndepositional faulting on sediment thickness and facies changes within fault blocks.
- Investigating correlations between stratigraphic architecture and base-metal (Zn-Pb-Ag) mineralisation.
Strengths
- Maximum thickness of the supersequence is precisely quantified at 3300 meters.
- Description details specific depositional systems (e.g., fluvial channels, turbidites) and structural controls (e.g., northeast-trending normal faults).
- Identifies at least three stratigraphic levels associated with base-metal mineralisation.
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 bias inherent to the Lawn Hill Platform and McArthur Basin region.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Likely compiled from geological field mapping, drillhole intersections, and reflection seismic analysis.
- Time Range
- Proterozoic era (specific dates not provided).
- Freshness
- Last updated 2026-03-25 17:30:14.574712; freshness should be verified.
- Geography
- Lawn Hill Platform and McArthur Basin, northern Australia.