Hydrochemistry of Groundwater-Seawater Mixing Zone, Nauru Island

Geoscience Australia Data provides hydrochemical data from a groundwater-seawater mixing zone on Nauru Island. The dataset describes the chemical evolution of freshwater to seawater, including saturation indices for carbonate minerals like dolomite, calcite, and aragonite at specific total dissolved solids levels. It was last updated on 2026-05-14.

Use Cases

• Modeling seawater intrusion and freshwater lens dynamics based on the described salinity gradient.
• Analyzing carbonate mineral saturation trends based on reported supersaturation thresholds for dolomite, calcite, and aragonite.
• Investigating dolomitization potential in coastal aquifers based on the described conditions in the mixing zone.
• Comparing open versus closed system geochemical evolution based on the partial pressure of CO2 trends described.

Strengths

• Dataset provides specific chemical thresholds, such as dolomite supersaturation at 300 mg/L total dissolved solids.
• Description details a distinct geochemical environment with a freshwater layer overlying a brackish mixing zone extending to 70 meters below sea level.
• Data originates from Geoscience Australia Data, a national geological survey.

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 data_gov_au, focusing solely on Nauru Island.

Provenance

Source

Geoscience Australia Data

Freshness

Last updated 2026-05-14 05:07:55.053300; freshness should be verified.

Geography

Nauru Island, central Pacific Ocean