Articles | Volume 11, issue 4
Research article
02 Jul 2020
Research article |  | 02 Jul 2020

Bromine speciation and partitioning in slab-derived aqueous fluids and silicate melts and implications for halogen transfer in subduction zones

Marion Louvel, Carmen Sanchez-Valle, Wim J. Malfait, Gleb S. Pokrovski, Camelia N. Borca, and Daniel Grolimund


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Short summary
Here, we conducted spectroscopic measurements on high-pressure, high-temperature fluids and melts to study how halogens, in particular bromine, can be incorporated in subduction zone fluids and melts. We find that a gradual evolution of bromine speciation with liquid composition enables the incorporation of high amounts of Br in both phases. Thus, bromine and, by extension, chlorine are expected to be efficiently recycled from the slab towards the volcanic arc.