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How Does the Thermal Structure of a Subduction Zone Evolve?

2021-08-26 12:27:50

EGU Geodynamics blog post features Asst. Prof. Cailey Condit and collaborator Adam Holt's work using geodynamic models to understand thermal evolution over the lifetime of a subduction zone. This work, recently published in the AGU Journal Geochemistry, Geophysics, Geosystems, shows the times scales and magnitudes of cooling as a subduction zone progressively ages. Coupling these geodynamic modelling results with thermodynamic modeling of subducting oceanic lithosphere helps us understand how this thermal structure enacts a first order control on the location, source, and magnitude of dehydration in the subarc, providing fluids to cause melting in the mantle wedge.

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