Hydrocarbon Gas Geochemistry in Otway and Gippsland Basin Sediments, 1988

Light hydrocarbon gas measurements from 342 sediment locations on the continental shelf and slope of the Otway and Gippsland Basins, collected during a 21-day research cruise in April/May 1988. The data, published by Geoscience Australia, identifies thermogenic hydrocarbons at 42 locations. Results include wet gas content and total gas concentration analyses for assessing source rock type and maturity.

Use Cases

• Identify potential hydrocarbon seepage zones based on thermogenic gas presence in near-surface sediments.
• Assess source rock maturity and type based on wet gas content ([C2-C4/C1-C4] x 100) spatial patterns.
• Correlate gas concentration anomalies with subsurface faulting structures mentioned in the description.
• Integrate geochemical data with thermal maturation models to locate principal liquid hydrocarbon source rocks.

Strengths

• Data covers 342 specific sampling locations, providing spatial density for analysis.
• Explicitly identifies 42 locations with thermogenic hydrocarbons (32 in Otway, 10 in Gippsland).
• Collection details are specific: a 21-day cruise in April/May 1988 with 17 days in Otway Basin and 4 in Gippsland.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data freshness should be verified; the underlying study is from 1988.

Provenance

Source

Geoscience Australia Data

Collection Method

Measured during a research cruise on the BMR vessel 'Rig Seismic'.

Time Range

April/May 1988

Freshness

Last updated 2026-04-20 03:24:27.896755; freshness should be verified

Geography

Offshore Otway and Gippsland Basins, Australia (continental shelf and upper slope)