Details

Autor(en) / Beteiligte

• Pokrovski, Gleb S.
• Dubrovinsky, Leonid S.

Titel

The S 3 – Ion Is Stable in Geological Fluids at Elevated Temperatures and Pressures

Ist Teil von

• Science (American Association for the Advancement of Science), 2011-02, Vol.331 (6020), p.1052-1054

Erscheinungsjahr

2011

Link zum Volltext

Quelle

Science Online_科学在线

Beschreibungen/Notizen

• Instead of sulfide or sulfate, the trisulfur ion S 3 – is stable at high temperatures. 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 S 3 – . The large stability range of S 3 – enables efficient transport and concentration of sulfur and gold by geological fluids in deep metamorphic and subduction-zone settings. Furthermore, the formation of S 3 – requires a revision of sulfur isotope–fractionation models between sulfides and sulfates in natural fluids.