%0 Journal Article
%T The S3- Ion Is Stable in Geological Fluids at Elevated Temperatures and Pressures
%+ Géosciences Environnement Toulouse (GET)
%A Pokrovski, Gleb S.
%A Dubrovinsky, Leonid S.
%< avec comité de lecture
%@ 0036-8075
%J Science
%I American Association for the Advancement of Science (AAAS)
%V 331
%P 1052
%8 2011
%D 2011
%Z 2011Sci...331.1052P
%R 10.1126/science.1199911
%K GEOCHEM PHYS
%Z Sciences of the Universe [physics]Journal articles
%X The chemical speciation of sulfur in geological fluids is a controlling factor in a number of processes on Earth. The two major chemical forms of sulfur in crustal fluids over a wide range of temperature and pressure are believed to be sulfate and sulfide; however, we use in situ Raman spectroscopy to show that the dominant stable form of sulfur in aqueous solution above 250°C and 0.5 gigapascal is the trisulfur ion S3-. The large stability range of S3- enables efficient transport and concentration of sulfur and gold by geological fluids in deep metamorphic and subduction-zone settings. Furthermore, the formation of S3- requires a revision of sulfur isotope-fractionation models between sulfides and sulfates in natural fluids.
%G English
%L insu-03620194
%U https://insu.hal.science/insu-03620194
%~ INSU
%~ METEO
%~ UNIV-TLSE3
%~ CNRS
%~ CNES
%~ OMP
%~ OMP-LMTG
%~ OMP-GET
%~ UNIV-UT3
%~ UT3-INP
%~ UT3-TOULOUSEINP