Geophysical and Geological Studies in Antarctic Systems

Studies of Antarctica’s deep structure and surface geology combine a suite of geophysical techniques—satellite gravimetry, airborne gravity and magnetic surveys, seismic profiling—and comprehensive geological mapping to reveal the architecture of the crust and lithosphere beneath the ice sheet. These efforts characterise subglacial mountain ranges, sedimentary basins and rift systems, map the distribution of heat‐producing elements in the crust, and document volcanic edifices hidden below kilometres of ice. Integrated datasets inform models of ice‐sheet stability by constraining basal boundary conditions such as geothermal heat flow and bedrock topography. Geological mapping at continent scale provides the framework for reconstructing Gondwana’s assembly and for understanding how ancient tectonic features continue to guide present‐day ice dynamics. Together, these approaches underpin projections of sea‐level rise, refine reconstructions of past climate events, and support the development of hazard‐assessment and resource‐management strategies in polar regions.

Research from Nature Portfolio

Recent studies employing satellite gravity‐gradient data have produced high‐resolution curvature images of Antarctica’s lithosphere. By analysing gravity gradients from a dedicated satellite mission and integrating these with seismic tomography, researchers have delineated the boundary between the rigid East Antarctic Craton and the more attenuated West Antarctic Rift System. These curvature maps expose previously unresolved heterogeneity in crustal structure beneath the ice, offering new insights into tectonic domains and their influence on ice‐sheet behaviour. The combination of seismological and gravity‐gradient imaging promises to refine models of continental lithosphere and improve representations of basal conditions in ice‐flow simulations.

Geophysical and Geological Studies in Antarctic Systems publication trend

The graph below shows the total number of articles in geophysical and geological studies in antarctic systems across all publications each year (not limited to Nature Index journals).

Technical terms

Gravity gradient: The spatial rate of change of Earth’s gravitational acceleration, measured by specialised satellites to map subsurface density variations.

Aeromagnetic anomaly: Variations in Earth’s magnetic field recorded from an aircraft, used to infer the distribution and composition of crustal rocks.

Radiogenic heat production: Heat generated within rocks by the decay of radioactive isotopes, influencing geothermal heat‐flow at the base of ice sheets.

Subglacial: Pertaining to the bedrock or geological features located beneath a glacier or ice sheet.

Lithosphere: The rigid outer layer of Earth, comprising the crust and uppermost mantle, which controls tectonic and isostatic behaviour.

References

1. A continent-wide detailed geological map dataset of Antarctica. Scientific Data (2023).
2. Crustal Heterogeneity of Antarctica Signals Spatially Variable Radiogenic Heat Production. Geophysical Research Letters (2024).
3. Tectonic Implications for the Gamburtsev Subglacial Mountains, East Antarctica, from Airborne Gravity and Magnetic Data. Remote Sensing (2023).
4. A new volcanic province: an inventory of subglacial volcanoes in West Antarctica. Geological Society London Special Publications (2017).