Il Corso fornisce le nozioni sulla dinamica dei principali processi litosferici e del mantello sub-litosferico. Inoltre, obiettivo del corso è l'analisi dei modelli tettonici attualistici e la loro applicazione ai casi naturali. Particolare riguardo è dedicato al ruolo della convezione mantellica nella dinamica delle placche, alla deformazione dei margini attivi ed alle relazioni tra stato termico della litosfera e i differenti contesti geodinamici.
Expected learning outcomes
Lesson period: First semester
(In case of multiple editions, please check the period, as it may vary)
Lectures deal with the dynamics of principal lithospheric processes and of sub-lithospheric mantle. In addition one of the main goal is the analysis of actualistic tectonic models and their application to case histories. Focus on: role of mantle convection on plate dynamics; active margins deformation; relationships between lithosphere thermal state and geodynamic environments. Lecture content: · Mantle convection: convection mechanism and convective structure; lithospheric plates related to mantle convection; mantle heterogeneity. · Geodynamics and deformation of continental plates in subduction and collision zones and active tectonic erosion and accretion mechanisms. Active tectonic mechanism along divergent and transform margins, geometric and structural outline. · Geodynamics of present day oceanic lithosphere and of ophiolitic complexes (examples from the Alps; P-T trajectories). · Thermal state of the lithosphere in the mechanically active zones (subduction, collision, rift): thermal models analysis and comparison with the thermo-mechanical evolution of collisional belts (Alps, Variscan chain, .....) or of fossils and present-day continental rifting.
Practical work consists of:
· field trips along selected cross sections of a collisional belt (namely, the Alpine and Apennine belts), where the structural investigation of active zones of the lithosphere is possible within different structural levels, in extensional, transform and convergent geodynamic regimes. · practical work in classroom on the topics of the lectures and the subjects of field trips.