163-A 3.2

Numerical modelling of subduction-related orogeny in the Central Southern Andes (30º-36ºS): the role of upper plate characteristics.

The aim of this project is to use numerical thermomechanical modeling to test models of geodynamic evolution in the Andes between 33º-36ºS. Using geologic and geophysical data, we have proposed two contrasting modes of accommodating deformation north and south of 35ºS, related to the crustal architecture inherited from Mesozoic extensional processes. Numerical modeling of subduction systems can provide a verification of the proposed models for this Andean segment, with implications for the behavior of petroleum systems and the formation of mineral resources in the area. Comparing the results with those obtained at different latitudes will provide further insight about subductionrelated orogenesis.