Differentiating induced versus spontaneous subduction initiation using thermomechanical models and metamorphic soles

Xin Zhou () and Ikuko Wada
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Xin Zhou: University of Minnesota
Ikuko Wada: University of Minnesota

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Despite the critical role of subduction in plate tectonics, the dynamics of its initiation remains unclear. High-temperature low-pressure metamorphic soles are vestiges of subduction initiation, providing records of the pressure and temperature conditions along the subducting slab surface during subduction initiation that can possibly differentiate the two end-member subduction initiation modes: spontaneous and induced. Here, using numerical models, we show that the slab surface temperature reaches 800–900 °C at ~1 GPa over a wide range of parameter values for spontaneous subduction initiation whereas for induced subduction initiation, such conditions can be reached only if the age of the overriding plate is

Date: 2021
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DOI: 10.1038/s41467-021-24896-x

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