Force-balance changes at the subduction-to-collision transition and implications for mountain building

Armin Dielforder & Andrea Hampel
The elevation of mountain belts increases at the subduction-to-collision transition in response to crustal thickening and processes like slab breakoff, but the main parameters controlling how much mountain height increases remain poorly understood. Based on analytical and finite-element force-balance models, we show that the increase in mountain height depends mainly on the magnitude of the shear force along the plate boundary fault (megathrust) and the reduction of submarine margin relief. During oceanic subduction, the megathrust...
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