Sulfur is a key element in terrestrial magmatic processes yet its geochemical behavior remains one of the most difficult to model due heterovalent chemistry. The maximum amount sulfur silicate melt can dissolve before saturating with sulfide (e.g., pyrrhotite) or sulfate anhydrite) changes redox state system and has important implications for budget system. Several empirical models have been de...

Abstract The chemical exchange between the atmosphere, crust and mantle depends on sediment recycling via subduction. However, it remains unclear how atmospherically modified may affect oxygen fugacity through time. Great Oxidation Event, among most important atmospheric changes Earth, offers an opportunity to investigate in magmatism related surface–mantle interactions. Here we use sulfur K-ed...

Abstract To investigate the effect of carbon-bearing phases on release fluids in subducted serpentinites, we performed high-pressure multi-anvil experiments representative ophicarbonate assemblages over a pressure range from 2.5 GPa to 5 and 450 °C 900 °C, across antigorite-out reaction. Parallel were carbonate-free serpentinites. In all experiments, monitored and/or controlled oxygen fugacity....

an analytical equation of state was applied to calculate the thermodynamic properties for argon.the equation of state is that of song and mason. it is based on a statistical-mechanical perturbationtheory of the hard convex bodies and can be written as fifth-order polynomial in the density. thereexist three temperature-dependent parameters: the second virial coefficient, an effective molecularvo...