Organic Geochemistry Analysis of the McArthur River Pb/Zn/Ag Deposit

Polycyclic aromatic hydrocarbon distributions in McArthur River ore samples indicate hydrothermal fluid temperatures of 250-400°C, revising previous lower estimates. The data provides evidence for ore formation in a marine diagenetic environment and serves as a repository for paleobiological information. Findings are based on research submitted by Chen et al. and published by Logan et al. in 2001.

Use Cases

• Calibrate ore formation temperature models using PAH isomer distributions as a geothermometer.
• Investigate the source depth of metal-bearing brines by analyzing the implied higher-temperature fluid geochemistry.
• Study the paleobiology and microbiology of ancient hydrothermal systems preserved within the deposit.
• Re-evaluate the necessity of evaporites as a sulfur source based on evidence for high-temperature hydrogen sulfide transport.

Strengths

• Data provides strong, multi-faceted evidence for a specific diagenetic ore-forming environment.
• Analysis revises a key parameter (temperature range) with significant implications for exploration models.
• Findings are positioned as widely applicable to understanding sediment-hosted base metal deposits.

Limitations

• No raw sample data, column definitions, or quantitative PAH abundance tables are provided.
• Core data is described in a submitted manuscript and a 2001 publication, which may be temporally stale.
• Geographic scope is limited to a single, though exemplary, deposit in northern Australia.

Provenance

Source

Australian Ocean Data Network, aggregating external research publications.

Collection Method

Geochemical analysis of polycyclic aromatic hydrocarbons in ore and mudstone samples.

Time Range

Study published in 2001, with findings from a submitted manuscript.

Freshness

null

Geography

McArthur River (HYC) Pb/Zn/Ag deposit, northern Australia.