Underthrusting and the elastic-rebound theory are consistent with the gross static deformations after earthquakes for island-arc regions such as Japan, Alaska, and Chile. Yet anomalous, time-dependent post-earthquake adjustments suggest additional processes. Here the asthenosphere or mantle becomes the element that both determines the post-seismic deformation and controls the accumulation of st...

Plate tectonics is based on the concept of rigid lithosphere plates sliding on a mechanically weak asthenosphere. Many models assume that the weakness of the asthenosphere is related to the presence of small amounts of hydrous melts. However, the mechanism that may cause melting in the asthenosphere is not well understood. We show that the asthenosphere coincides with a zone where the water sol...

Fuchs, L. 2016. Strain quantifications in different tectonic scales using numerical modelling. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1354. 58 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9513-8. This thesis focuses on calculation of finite and progressive deformation in different tectonic scales using 2D numerical mod...

The relative motion of the lithosphere with respect to asthenosphere implies existence a boundary zone that accommodates shear between rigid plates and flowing mantle. This is typically referred as lithosphere-asthenosphere (LAB). width this mechanisms accommodating across it have important implications for coupling mantle convection surface plate motion. Seismic observations provided evidence ...

Recent seismological evidences imply that the boundary between the lithosphere and asthenosphere is a compositional boundary in the oceanic upper mantle, and a rapid increase of viscosity at this boundary is suggested. We modeled a thermal convection in the oceanic mantle numerically using the finite element method, and investigated geodynamical consequences of such a rheological layering. Earl...

The current geological and tectonic setting of Iran is due to the ongoing convergence between the Arabian and Eurasian Plates, which resulted in the formation of the Iranian plateau, mountain building, extensive deformation and seismicity. The Iranian plateau is characterized by various domains including the continental collision and the oceanic plate seduction. Based on S receiver functions ar...