2012-03-11

Mapping the Moho with GOCE

He visto esto en la pagina de la ESA.
Aparte del obvio chiste con el nombre, desconozco si hay mapas de mayor resolución, pero sería interesante ¿no?

http://www.esa.int/esaEO/SEMMC68YBZG_index_0.html

2012-03-07

Evolución de la corteza en limite de placas convergentes.

The thermal–mechanical evolution of crustal orogenic belts at convergent plate boundaries: A reappraisal of the orogenic cycle

Olivier VanderhaegheCorresponding author contact information

Como evoluciona la corteza en zonas de convergencia, dependiendo de la interacción entre las diferentes fuerzas y condiciones existentes.

Dynamics of crustal wedges, orogenic plateaus, metamorphic core complexes and rifts.

Thermal–mechanical evolution of the crust at plate boundaries and the crustal tectonic cycle. The thermal–mechanical evolution of the crust at plate boundaries and the crustal tectonic cycle are illustrated by the evolution of crustal thickness and Moho temperature as a function of time. The first stage of the thermal–mechanical evolution of the crust at convergent plate boundaries is characterized by the development of a crustal wedge under a low-geothermal gradient dominated by subduction. A steady-state is reached if mass redistribution by erosion counterbalances crustal accretion. If, not thermal maturation of the crustal wedge is responsible for the weakening of the lower crust which leads to the wedge/plateau transition. At this stage, the basal traction force decomposes into Ftw beneath the plateau and Fts along its edges. A steady-state is reached if accretion is balanced by gravity-driven lateral flow of the weakened crust. A modification of the lithospheric-scale dynamics boundary condition causes the switch from crustal thickening to thinning and the mode of crustal extension ranges from metamorphic core complex to rift as a function of the rheologic state of the crust. Crustal thinning is associated with isothermal decompression and is followed by thermal subsidence.