The major magmatic volatile components—H 2 O, CO 2, S, Cl, and F—play an important role
in the formation, evolution, and eruption of magma. Knowledge of magmatic concentrations …

Some 300–600 Tg of volatiles are globally vented each year by arc volcanism. Such arc gas
emissions have contributed to past and present-day evolution of the Earth atmosphere and …

The volatile saturation surface in H2O–CO2–silicate melt systems is modeled by applying
thermodynamic equilibrium between gaseous and liquid volatile components. The whole …

Piston cylinder experiments are used to investigate the effect of oxygen fugacity (ƒO 2) on
sulphur speciation and phase relations in arc magmas at 0.5–1.5 GPa and 840–950° C. The …

The global carbon dioxide (CO2) flux from subaerial volcanoes remains poorly quantified,
limiting our understanding of the deep carbon cycle during geologic time and in modern …

Alkaline mafic magmas forming intra-plate oceanic islands are believed to be strongly
enriched in CO2 due to low-degree partial melting of enriched mantle sources. However …

We present here new experimental data on H2O–CO2 solubility in mafic melts with variable
chemical compositions (alkali basalt, lamproite and kamafugite) that extend the existing …

It is generally accepted, but not experimentally proven, that a quantitative prediction of
volcanic eruptions is possible from the evaluation of volcanic gas data. By discussing the …

The degassing of CO2 and S from arc volcanoes is fundamentally important to global
climate, eruption forecasting, ore deposits, and the cycling of volatiles through subduction …

Magmatic degassing is ubiquitous and enduring, yet its impact on both planetary surficial
chemistry and how it may have varied among planetary systems remains imprecise. A large …