oa Surface Controls on the Thermal Regime of External Zones of Orogenic Belts

In extensional settings, the thermal evolution is closely linked to the global geodynamic development (lithospheric and crustal thinning). In collision areas, numerous processes acting on the thermal field. are superimposed and the evolution through time is subsequently more complex. The surface heat flow density (HFD) distribution across active orogenic belts show large variations and illustrates that no standard profile can be proposed (fig .1).