Active Hydrocarbon Seepage Features on the Yampi Shelf, Northwest Australia

Active present-day hydrocarbon seepage has been imaged for the first time in Australia on the tropical carbonate Yampi Shelf. The dataset from Geoscience Australia correlates seabed features like gas plumes and pockmarks with sub-surface geophysical data, such as seismic signal attenuation. Seepage activity appears to vary with macro-tidal cycles and is influenced by the shelf's coarse bioclastic sediments and high-energy currents.

Use Cases

• Correlating gas plume activity in the water column with tidal cycles based on the described pressure relationship.
• Mapping hydrocarbon migration pathways based on the described control by reactivated basement fractures and dykes.
• Analyzing the preservation of seabed features like mounds and hard-grounds based on the described influence of sediment composition and current energy.

Strengths

• Documents the first imaging of active hydrocarbon seepage in Australia on a tropical carbonate shelf.
• Correlates multiple data types, including water column imagery and sub-surface seismic features.
• Describes specific environmental controls on feature preservation, such as macro-tidal currents and bioclastic sediments.

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

Geoscience Australia Data

Collection Method

Likely collected through marine geophysical surveys, including seismic and water column imaging.

Freshness

Last updated 2026-04-20 02:56:43.908539; freshness should be verified.

Geography

Yampi Shelf, Northwest Australia, in 50 and 90 m water depth.