Dear Colleagues, We invite you to submit an abstract to the 2026 Goldschmidt conference in Montreal, Canada (July 12-17). Session 03a Subduction-zone chemical geodynamics (session in honor of Gray Bebout). Keynote speaker: Gray Bebout Session description: Element redistribution among mineral, fluid and melt in subduction zones has strong impact on crustal geochemical diversity (including ore genesis), mantle heterogeneity and surface environment. Gray Bebout's pioneering research investigating subduction-related metamorphic rocks has significantly advanced the understanding of the behavior of volatile and fluid-mobile elements in subduction zones and their applications to trace crust-mantle interaction, deep mantle recycling and surface emission. In honor of Gray Bebout's contributions, this session invites presentations of mineralogical, petrological, geochemical and/or thermodynamic insights from field observations, laboratory experiments, theoretical calculations, modeling and machine learning into the understanding of elemental mobility, flux and fate during processes across subduction zones (e.g., source enrichment, metamorphic fluid release, deep recycling and return to the surface) and their effects on long-term evolution of Earth's subsystems at various spatial and temporal scales. Session conveners: Long Li Sarah Penniston-Dorland Samuel Angiboust Taylor Ducharme Yunzhe Chen Abstract submission deadline is February 26, 2026 (23:59 ET/UTC-5). Details can be found here: https://conf.goldschmidt.info/goldschmidt/2026/cfp.cgi We hope you can join us for this exciting session! -- **************************************** Sarah Penniston-Dorland (she/her/hers) Professor Department of Geology University of Maryland College Park, MD 20742 (301) 405-6239 sarahpd@umd.edu sarahpd23@gmail.com http://www.geol.umd.edu/~sarahpd/ ***************************************