Marine Survey S282: Organic Contaminants in Geochemical Sediment Samples

Geoscience Australia's marine survey S282 detected fatty acid amides, chemical antioxidants, and UV absorbers in Arafura Sea sediments, introduced via plastic sampling bags and sunscreen. The study's primary aim was to detect evidence for natural hydrocarbon seepage, requiring careful distinction from contaminants like branched alkanes found in plastic. Detailed solvent extractions identified specific contamination sources, highlighting risks for multi-disciplinary organic geochemistry studies.

Use Cases

• Training contamination detection models based on compound signatures like fatty acid amides and Irganox 1076.
• Developing protocols for sample handling to mitigate sources like plastic bags and sunscreen mentioned in the description.
• Benchmarking hydrocarbon seepage indicators against known contaminant profiles such as branched alkanes with quaternary carbon atoms.
• Studying the transfer of compounds from sampling materials to environmental samples as described for PVC liners and lubricants.

Strengths

• Focus on a specific, documented contamination issue critical for organic geochemistry, as described.
• Identifies concrete contamination sources such as two brands of plastic bags and sunscreen.
• Links survey findings (e.g., BAQCs, alkyl cyclohexanes) to potential misinterpretation risks for petroleum evidence.

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 single Arafura Sea survey S282.

Provenance

Source

Geoscience Australia, Australian Ocean Data Network

Collection Method

Solvent extraction and analysis of sediment samples and potential contamination sources collected during marine survey S282.

Time Range

Survey S282 (specific date range not provided in input).

Freshness

Last updated 2026-06-23 05:28:01.684860; freshness should be verified.

Geography

Arafura Sea