Experimental Study of Sulfur Solubility in Silicate Melts Coexisting with Graphite as a Function of Silicate Melt Composition |
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| Authors: | Tomoyuki Tsujimura Arashi Kitakaze |
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| Institution: | Institute of Mineralogy, Petrology and Economic Geology, Faculty of Science, Tohoku University, Aoba, Sendai 980–8578, Japan [e-mail: ];Center for Northeast Asian Studies, Tohoku University, Aoba, Sendai 980–8576, Japan |
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| Abstract: | Abstract. Sulfur (S) solubility is determined in silicate melts, in particular with low-FeO content coexisting with graphite. In a high FeO range (>10 mol %), the S solubility is strongly dependent on the FeO content in silicate melt, which is in good agreement with previous works. In an intermediate FeO range (1∼10 mol %), the S solubility in melts with a multi-component system is higher than that in melts with a simple system. The SKα shift of the electron microprobe shows the dissolve sulfur is all sulfide. A positive dependence is observed between CaO and S content in the melt undoped with FeO, but the dissolved sulfur is sulfate. The relationship between melt composition, S content, and S oxidation state is discussed. |
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| Keywords: | silicate melt solubility sulfur speciation sulfide sulfate |
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