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Growth of Neogene Andes linked to changes in plate convergence using high-resolution kinematic models

Author

Listed:
  • Felipe Quiero

    (Universidad de Concepción, Facultad de Ciencias Químicas, Doctorate Program in Geological Sciences)

  • Andrés Tassara

    (Universidad de Concepción, Facultad de Ciencias Químicas, Departamento Ciencias de la Tierra
    Millenium Nucleus CYCLO “The Seismic Cycle along Subduction Zones”)

  • Giampiero Iaffaldano

    (University of Copenhagen, Department of Geosciences and Natural Resource Management)

  • Osvaldo Rabbia

    (Universidad de Concepción, Instituto de Geología Económica Aplicada)

Abstract

The Andean cordillera was constructed during compressive tectonic events, whose causes and controls remain unclear. Exploring a possible link to plate convergence has been impeded by the coarse temporal resolution of existing plate kinematic models. Here we show that the Neogene evolution of the Andean margin is primarily related to changes in convergence as observed in new high-resolution plate reconstructions. Building on a compilation of plate finite rotations spanning the last 30 million years and using noise-mitigation techniques, we predict several short-term convergence changes that were unresolved in previous models. These changes are related to main tectono-magmatic events and require forces that are compatible with a range of geodynamic processes. These results allow to revise models of ongoing subduction orogeny at its type locality, emphasizing the role of upper plate deformation in the balance between kinematic energy associated with plate motion and gravitational potential energy stored in orogenic crustal roots.

Suggested Citation

  • Felipe Quiero & Andrés Tassara & Giampiero Iaffaldano & Osvaldo Rabbia, 2022. "Growth of Neogene Andes linked to changes in plate convergence using high-resolution kinematic models," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29055-4
    DOI: 10.1038/s41467-022-29055-4
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    References listed on IDEAS

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    1. Yi-Wei Chen & Jonny Wu & John Suppe, 2019. "Southward propagation of Nazca subduction along the Andes," Nature, Nature, vol. 565(7740), pages 441-447, January.
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