Io’s spectacular volcanic activity involves strong tidal dissipation in its interior. Magnetic induction measurements and surface observations of the indicate presence significant melt interior, but distribution remains unconstrained. Tidal deformation a planetary body is strongly related to rheological properties thus, larger extent, content. The amplitude may be monitored by future missions f...

Plio–Pleistocene (3.4–0.125 Ma) post-plateau magmatism in the Meseta del Lago Buenos Aires (MLBA; 46.7jS) in southern Patagonia is linked with the formation of asthenospheric slab windows due to ridge collision along the Andean margin f 6 Ma ago. MLBA post-plateau lavas are highly alkaline (43–49% SiO2; 5–8% Na2O+K2O), relatively primitive (6–10% MgO) mafic volcanics that have strong OIB-like g...

[1] Although an average westward rotation of the Earth’s lithosphere is indicated by global analyses of surface features tied to the deep mantle (e.g., hot spot tracks), the rate of lithospheric drift is uncertain despite its importance to global geodynamics. We use a global viscous flow model to predict asthenospheric anisotropy computed from linear combinations of mantle flow fields driven by...

Earth’s upper mantle includes a 200 km thick asthenosphere underneath the plates where viscosity and seismic velocities are reduced compared to the background. This zone of weakness matters for plate dynamics and may be required for the generation of plate tectonics itself. However, recent seismological and electromagnetic studies indicate strong heterogeneity in thinner layers underneath the p...

The Colorado Plateau and its surroundings serve as an archetypal case to investigate the interaction of mantle melting processes lithospheric structure. It has been hypothesized that widespread Cenozoic volcanism indicates encroachment convective upwelling asthenosphere toward center. In this study, we generate a Common Conversion Point (CCP) stack S-to-p (Sp) receiver functions image locations...