The Sulfide Capacity and the Sulfur Content at Sulfide Saturation of Silicate Melts at 1400{degrees}C and 1 bar |
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| Authors: | O'NEILL HUGH ST C; MAVROGENES JOHN A |
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| Institution: | 1RESEARCH SCHOOL OF EARTH SCIENCES, AUSTRALIAN NATIONAL UNIVERSITY, CANBERRA, ACT 0200, AUSTRALIA
2DEPARTMENT OF GEOLOGY, AUSTRALIAN NATIONAL UNIVERSITY, CANBERRA, ACT 0200, AUSTRALIA |
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| Abstract: | The solubility of sulfur as S2– has been experimentallydetermined for 19 silicate melt compositions in the system CaO–MgO–Al2O3–SiO2(CMAS)± TiO2 ± FeO, at 1400°C and 1 bar, using CO–CO2–SO2gas mixtures to vary oxygen fugacity (fO2) and sulfur fugacity(fS2). For all compositions, the S solubility is confirmed tobe proportional to (fS2/fO2)1/2, allowing the definition ofthe sulfide capacity (CS) of a silicate melt as CS = S](fO2/fS2)1/2.Additional experiments covering over 150 melt compositions,including some with Na and K, were then used to determine CSas a function of melt composition at 1400°C. The resultswere fitted to the equation |
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