SEMINARIS DE LA FACULTAT DE GEOLOGIA I L'INSTITUT DE CIÈNCIES DE LA TERRA 'JAUME ALMERA'
hora: 15:00
lloc: Sala d'actes de l'Institut Jaume Almera

Dr. John Cosgrove (Department of Earth Science and Engineering, Imperial College London, Regne Unit)

The Zagros fold-thrust belt deforms a thick sequence of mainly passive margin rocks which sit, with marked unconformity, on the Pan African basement. The role of Pan African structures, particularly the large scale faults, on the evolution of the Zagros fold-thrust belt is immense. Initially these structures controlled the distribution of basins and sedimentation and later these sediments controlled the distribution of deformation within the belt and frequently act as conduits for salt diapirs.

Fold-thrust belts form marginal to orogenic belts and as a result are characterised by both brittle (thrusts) and ductile (folds) deformation. The initiation of both these structures is thought to be associated with high fluid pressures. In addition, as these structures evolve they in turn influence the movement of fluids through the deforming region. Thus a dynamic link exists between the fluid pressure and the fold-thrust belt as both the folds and thrusts propagate towards and onto the foreland.