{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Li L"],"funding":["National Natural Science Foundation of China (National Science Foundation of China)"],"pagination":["4273"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11794889"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["15(1)"],"pubmed_abstract":["Sulfur (S), an essential volatile in subduction zone magmatism, exhibits higher solubility in aqueous fluids compared to silicate melts. Despite its importance, the partitioning of S between aqueous fluids and silicate melts under the conditions of subduction zone, critical for magma generation and evolution, remains poorly understood. To address this knowledge gap, we performed piston-cylinder experiments at a temperature of 950 ℃ and pressures of 1 and 2 GPa, investigating the effects of various parameters including oxygen fugacity, melt composition, fluid composition (salinity) and pressure on S partitioning between aqueous fluid and silicate melt (D<sub>S</sub><sup>fluid/melt</sup>). Our results indicate that the D<sub>S</sub><sup>fluid/melt</sup> is always large (> > 1), and S prefers to enter the aqueous fluid at high pressures. However, the D<sub>S</sub><sup>fluid/melt</sup> decreases with increasing pressure from 1 to 2 GPa. Specifically, under reducing conditions (Ni-NiO buffer), D<sub>S</sub><sup>fluid/melt</sup> decreased from 147 ± 40 to 20 ± 2, whereas under moderately oxidizing conditions (Re-ReO<sub>2</sub> buffer), it decreased from 27 ± 1 to 20 ± 2. These results stress the strong affinity of S for aqueous fluids at high pressures. Together with the great capacity for S dissolution in the H<sub>2</sub>O-rich magma within the deep Earth, fluid-saturated felsic magma efficiently transports substantial amounts of S from deep to shallow regions in subduction zone settings. This process plays a crucial role in the formation of giant porphyry deposits and provides a potential source of excess S released during explosive volcanic eruptions."],"journal":["Scientific reports"],"pubmed_title":["Sulfur partitioning between aqueous fluids and felsic melts at high pressures: Implications for sulfur migration in subduction zones."],"pmcid":["PMC11794889"],"funding_grant_id":["41921003","42250710679","42073057","92062222","42250202"],"pubmed_authors":["Liu X","Xu T","Li L","Wang J","Xiong X"],"additional_accession":[]},"is_claimable":false,"name":"Sulfur partitioning between aqueous fluids and felsic melts at high pressures: Implications for sulfur migration in subduction zones.","description":"Sulfur (S), an essential volatile in subduction zone magmatism, exhibits higher solubility in aqueous fluids compared to silicate melts. Despite its importance, the partitioning of S between aqueous fluids and silicate melts under the conditions of subduction zone, critical for magma generation and evolution, remains poorly understood. To address this knowledge gap, we performed piston-cylinder experiments at a temperature of 950 ℃ and pressures of 1 and 2 GPa, investigating the effects of various parameters including oxygen fugacity, melt composition, fluid composition (salinity) and pressure on S partitioning between aqueous fluid and silicate melt (D<sub>S</sub><sup>fluid/melt</sup>). Our results indicate that the D<sub>S</sub><sup>fluid/melt</sup> is always large (> > 1), and S prefers to enter the aqueous fluid at high pressures. However, the D<sub>S</sub><sup>fluid/melt</sup> decreases with increasing pressure from 1 to 2 GPa. Specifically, under reducing conditions (Ni-NiO buffer), D<sub>S</sub><sup>fluid/melt</sup> decreased from 147 ± 40 to 20 ± 2, whereas under moderately oxidizing conditions (Re-ReO<sub>2</sub> buffer), it decreased from 27 ± 1 to 20 ± 2. These results stress the strong affinity of S for aqueous fluids at high pressures. Together with the great capacity for S dissolution in the H<sub>2</sub>O-rich magma within the deep Earth, fluid-saturated felsic magma efficiently transports substantial amounts of S from deep to shallow regions in subduction zone settings. This process plays a crucial role in the formation of giant porphyry deposits and provides a potential source of excess S released during explosive volcanic eruptions.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Feb","modification":"2025-04-04T02:09:46.25Z","creation":"2025-04-04T02:09:46.25Z"},"accession":"S-EPMC11794889","cross_references":{"pubmed":["39905166"],"doi":["10.1038/s41598-025-88649-2"]}}