<b><i>Cold subduction induces deep carbon recycling: implications from petrogenesis and thermodynamic modeling of eclogites from the Alps</i></b>

Table S1. Main mineral compositions and modal proportion (vol.%), and bulk-rock compositions of the Zermatt-Saas eclogites. Table S2. Representative laser Raman spectra of fluid inclusions and carbonate minerals.Table S3. EPMA analyses for the studied eclogites.Table S4. Trace element compositions of the studied eclogites.Table S5. The solubility of calcite/aragonite, dolomite and magnesite in aqueous fluid.Table S6. The variations in H2O released by metamorphic dehydration, C released by metamorphic decarbonation and C released by dissolving decarbonation in the system for an eclogite that enters the deeper mantle and an exhumed eclogite that returns to the shallow crust.Table S7. The evolution in content of H₂O, C, and mineral content in the system at different subduction zone thermal gradients.Table S8. The relationship between the carbonate content in AOC and the metamorphic decarbonation efficiency and flux per unit rock.Table S9. The slab-top P–T conditions at sub-arc depths of global oceanic subduction zones.