An integrative model of the lithosphere of Northeastern Eurasia

Understanding the thermal and compositional structure of the lithosphere is essential to gain insights into its evolution, as it plays a crucial role in shaping tectonic processes, continental stability, and mantle dynamics. Although several geophysical and petrological studies have been conducted to investigate the lithospheric structures in parts of Northeastern Eurasia, several important issues remain unresolved. In particular, the area east of the Verkhoyansk Range remains one of the least explored areas in the world, having a very limited seismic data coverage. In this study, we determine variations in density, temperature, and composition of the lithosphere and underlying upper mantle of this large area, by applying an integrative technique that jointly interprets seismic tomography and gravity data. We also use the gravity gradients, derived directly from the GOCE mission, to increase the vertical resolution. This approach has provided new insights into the structure of the lithosphere in this region, identifying the origin of its heterogeneities