Dra. Marta Perez-Gussinye, Institut Jaume Almera, CSIC Barcelona
Sala d'Actes de l'Insitut de Ciencies de la Terra "Jaume Almera" c/Lluis Solé Sabaris s/n 08028 Barcelona, a les 12h.

Field-based geological studies show that continental deformation preferentially occurs in young tectonic provinces rather than in old cratons. This partitioning of deformation suggests that the cratons are stronger than the surrounding younger Phanerozoic provinces. However, although Archean and Phanerozoic lithosphere differ in their thickness and composition, their relative strength is a matter of much debate. One proxy of strength is the effective elastic thickness of the lithosphere, Te. Unfortunately, spatial variations in Te are not well understood as different methods yield different results. The differences are most apparent in cratons where Bouguer coherence yields large Te values (> 60 km) and free-air admittance low values (< 25 km). In this talk I will present the results of tests with synthetic topography and gravity anomaly data, which show that when both methods are formulated consistently, the resulting Te is equivalent. Finally, we apply both methods to Eu