East Antarctic Subglacial Heat Flow from Rock Geochemistry

Geoscience Australia research describes the distribution of heat-producing elements in East Antarctic rocks to improve ice sheet models. The dataset likely contains geochemical measurements, including uranium, thorium, and potassium concentrations, from a 275 km coastal transect. These measurements quantify subglacial heat flow variability, which is critical for predicting ice stream behavior and sea-level change.

Use Cases

• Calibrating ice sheet models with spatially variable geothermal heat flux based on rock type distributions.
• Analyzing the correlation between specific heat-producing element concentrations and localized subglacial melting.
• Mapping regional geothermal anomalies in East Antarctica to identify potential zones of ice stream instability.

Strengths

• Based on a specific 275 km geochemical transect along the Prydz Bay coastline, providing localized data.
• Quantifies a wide range of heat production values, from 0.02 to 66 µW per cubic meter, illustrating significant natural variability.
• Derived from research published in a peer-reviewed journal (Journal of the Geological Society, London).

Limitations

• Key metadata such as column names, row count, file size, and license are not provided in any source.
• The dataset's structure and accessibility are unclear, as only an HTML format is listed without a direct data link.
• The 'last updated' dates (2026) are future dates, indicating potential metadata errors or placeholder values.

Provenance

Source

Geoscience Australia, with collaborators from the Australian Antarctic Division, Antarctic Climate and Ecosystems CRC, University of Melbourne, and University of Texas.

Collection Method

Geochemical analysis of rock samples collected along a transect.

Freshness

Last updated dates conflict between sources, with the most recent listed as 2026-04-30, which is a future date.

Geography

East Antarctica, specifically a 275 km coastal transect from the Vestfold Hills to the Amery Ice Shelf in Prydz Bay.