Deformation partitioning in mountain belts: Insights from analogue modelling experiments and the Taiwan collisional orogen

Jacques Malavieille, Stephane Dominguez, Chia Yu Lu, Chih Tung Chen, Elena Konstantinovskaya

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Many orogens on the planet result from plate convergence involving subduction of a continental margin. The lithosphere is strongly deformed during mountain building involving subduction of a plate composed generally of accreted continental margin units and some fragments of downgoing oceanic crust and mantle. A complex deformation involving strong partitioning of deformation modes and kinematics produces crustal shortening, accompanied by crustal thickening. Partitioning depends on three main factors: (1) rheologic layering of the lithosphere; (2) interaction between tectonics and surface processes; (3) subduction kinematics and 3D geometry of continental margins (oblique convergence, shape of indenters). Here we present an original view and discussion on the impact of deformation partitioning on the structure and evolution of orogens by examining the Taiwan mountain belt as a case study. Major unsolved questions are addressed through geological observations from the Taiwan orogen and insights from analogue models integrating surface processes.

Original languageEnglish
Pages (from-to)84-103
Number of pages20
JournalGeological Magazine
Volume158
Issue number1
DOIs
StatePublished - Jan 2021

Keywords

  • Taiwan belt
  • analogue modelling
  • deformation partitioning
  • orogenesis
  • surface processes
  • tectonics

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