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

摘要: Abstract Convergent plate boundaries are characterized by the development of crustal orogenic wedges and plateaus but also gravitational collapse previously thickened crust leading to opening intermontane eventually oceanic back-arc basins. Foreland extensional sedimentary basins in boundary region filled erosional products crust. Metamorphic rocks forming attest burial exhumation under contrasted geothermal gradients. These features portray cycle first-order indicators thermal mechanical evolution within region. This is controlled complex interactions among (i) dynamic balance forces that arise from plate-tectonic, potential energy, buoyancy, (ii) between deformation-induced radioactive heat production advection related subduction, deformation, magma transfer, (iii) mass transfer uplift erosion. To account for these geological characteristics, a generic model, integrates results physical modeling, proposed thermal–mechanical belts its implication controlling transition different phases cycle. In this low high gradient associated with increased owing decay deformation. Partial melting rheologic weakening thermally mature triggers gravity-driven lateral flow lower controls wedge plateau. Destruction achieved part erosion mostly collapse. The style extension rheology at onset as thins cools. Gravitational permitted modification lithosphere dynamics convergence zone might lead new basin if followed thinning lithospheric mantle.