Gravity Anomalies and Crustal Structure Analysis

Gravity anomalies arise from lateral mass distribution within the Earth’s crust and upper mantle, reflecting variations in rock density and structural architecture. Analysis of these anomalies is central to mapping crustal thickness, identifying tectonic boundaries and revealing subsurface features inaccessible to seismic methods. Techniques combine satellite and terrestrial gravity measurements with geophysical constraints—such as seismic profiles, borehole densities and magnetic susceptibility—to reconstruct three-dimensional density models. Advances in data acquisition from missions like GOCE, together with sophisticated inversion algorithms including Bayesian and spectral-combination methods, have increased spatial resolution to tens of kilometres and improved accuracy in delineating key interfaces such as the Mohorovičić discontinuity. This research underpins exploration for mineral and geothermal resources, informs models of lithospheric evolution and supports hazard assessment in active deformation zones worldwide.

Research from Nature Portfolio

Recent studies have advanced three-dimensional crustal imaging through joint inversion of gravity and magnetic anomalies, achieving an unprecedented 15 km spatial resolution in the Mediterranean basin and resolving sedimentary and crystalline horizons down to upper-mantle levels. Complementary efforts have produced gravity gradient grids at multiple satellite altitudes, capturing high-frequency directional signals that enhance lithospheric and isostatic modelling across regional scales. In tectonic settings, refined gravity field models have mapped the Moho beneath the Tibetan Plateau, revealing fold amplitudes of ±9 km and directional ranges orthogonal to observed surface deformation, thus illuminating deep crustal responses to compressional tectonics.

Gravity Anomalies and Crustal Structure Analysis publication trend

The graph below shows the total number of articles in gravity anomalies and crustal structure analysis across all publications each year (not limited to Nature Index journals).

Technical terms

Gravity anomaly: The difference between observed gravity and a theoretical reference field, used to infer subsurface density variations.

Gravity inversion: Computational methods that transform gravity measurements into three-dimensional models of density distribution or interface depths.

Mohorovičić discontinuity (Moho): The boundary separating the Earth’s crust from the underlying mantle, identified by a change in seismic velocities and density.

Gravity gradient: The spatial rate of change of the gravity vector, providing additional directional sensitivity to density contrasts.

Isostasy: The principle that the lithosphere floats in gravitational equilibrium on the more ductile asthenosphere, affecting gravity anomaly interpretation.

References

1. An enhanced view on the Mediterranean Sea crust from potential fields data. Scientific Reports (2023).
2. Satellite gravity gradient grids for geophysics. Scientific Reports (2016).
3. Moho topography, ranges and folds of Tibet by analysis of global gravity models and GOCE data. Scientific Reports (2015).
4. A High-Resolution Global Moho Model from Combining Gravimetric and Seismic Data by Using Spectral Combination Methods. Remote Sensing (2023).
5. Least squares collocation method in Moho depth determination in Iran using gravity gradient data. Heliyon (2024).
6. Fast nonlinear gravity inversion in spherical coordinates with application to the South American Moho. Geophysical Journal International (2016).