Abstract
S and Cl distribution between sodalite and fluid was experimentally studied at temperatures of 300–800°C and pressure of 0.5–3 kbar. It is demonstrated that S is preferably distributed into fluid in equilibrium with sodalite of the composition X SodS > 0.05 throughout the whole temperature range. The distribution of S in the sodalite-fluid system is nonideal. An equation (derived from experimental data) is presented for evaluating the S mole fraction in fluid from the composition of sodalite at a known temperature. The S mole fractions in the fluid are evaluated for sodalite assemblages from nepheline syenites of the Lovozero Massif as being within the range of 0.036–0.23. The S mole fraction in the fluid is proved to increase with increasing mineral formation temperatures.
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Original Russian Text © A.R. Kotel’nikov, V.I. Tikhomirova, Z.A. Kotel’nikova, N.I. Suk, A.M. Koval’skii, 2009, published in Geokhimiya, 2009, No. 6, pp. 603–612.
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Kotel’nikov, A.R., Tikhomirova, V.I., Kotel’nikova, Z.A. et al. An experimental study of Cl and S distribution between sodalite and fluid. Geochem. Int. 47, 568–577 (2009). https://doi.org/10.1134/S0016702909060032
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DOI: https://doi.org/10.1134/S0016702909060032