Canning Basin Crude Oil Carotenoid Biomarker Geochemistry

Geoscience Australia Data presents a paleo-reconstruction study of the Canning Basin using carotenoid-derived biomarkers from crude oils and source rocks. The research analyzes diagnostic biomarker hydrocarbons, including saturated beta-carotane and aromatic compounds like paleorenieratane and chlorobactane, to clarify paleo-depositional environments and organic matter diversity. The study extends prior geochemical work on Ordovician-, Devonian-, and Carboniferous-sourced oils from this large frontier petroleum province.

Use Cases

• Classify paleo-depositional environments by analyzing the presence and ratios of aromatic carotenoids like paleorenieratane and isorenieratane in oil samples.
• Assess water column stratification in ancient seaways by modeling distributions of biomarkers derived from green sulphur bacteria (e.g., chlorobactane) versus oxygenated-water algae (beta-carotane).
• Correlate oil sources across the basin by comparing carotenoid signatures, such as the unique okenane presence in the Cudalgarra 1 oil, to specific geological periods.
• Characterize organic matter diversity in source rocks by investigating the variable distributions of carotenoid compounds across different oil fields like Point Torment 1 and West Kora 1.

Strengths

• Focuses on a large frontier petroleum province covering approximately 720,000 km².
• Analyzes a diverse range of specific biomarkers, including saturated and aromatic C40 carotenoid-derived compounds.
• Extends prior published geochemical studies on oils from multiple geological periods (Ordovician, Devonian, Carboniferous).

Limitations

• Data is presented in a PDF report format, not as a structured, queryable table, limiting direct computational analysis.
• Sample size and specific analytical measurements (e.g., concentration values) for each oil are not quantified in the provided description.
• Geographic coverage is specific to the Canning Basin, limiting generalizability to other regions.

Provenance

Source

Geoscience Australia Data

Collection Method

Geochemical analysis of diagnostic biomarker hydrocarbons derived from carotenoid pigments in crude oils and source rocks.

Time Range

Paleozoic era, specifically Ordovician, Middle to Late Devonian, and Early Carboniferous periods.

Freshness

null

Geography

Canning Basin, Western Australia, including the Lennard Shelf and Fitzroy Trough.