Pulsed metamorphism and fluid release at the subduction interface
IPGP - Îlot Cuvier
Séminaires Tectonique et Mécanique de la Lithosphère
Virginia Tech, US
Dehydration and densification of subducting oceanic crust and mantle drive plate tectonics, control elemental cycling to the deep Earth, and induce arc magmatism and intermediate-depth seismicity. While subduction can persist for millions of years, the processes related to fluid release and densification are shown to be brief. This study uses field-based constraints to determine the duration and rates of metamorphism and fluid release during subduction, utilizing garnet geochronology, phase equilibria modeling, and geodynamic models to better understand subduction zone processes.