Electrolytic fluid speciation by Gibbs energy minimization and implications for subduction zone mass transfer

- Electrolytic fluid speciation is implemented in a Gibbs energy minimization code.
- Dissolution increases C-solubility < two-fold compared to molecular fluid models.
- Infiltration-driven decarbonation desiccates the crust by K-depletion.
- Sulfides become soluble by the reduction of carbonate to diamond at ∼6 GPa.