Other
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52..989s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 5, pp.989-1005
Other
29
Scientific paper
Vapor-saturated solubility relationships in the system NaCl-KCl-H 2 O have been determined by experimentally synthesizing fluid inclusions in quartz in the presence of known brine compositions and then measuring the dissolution temperatures of halite and/or sylvite daughter crystals within the inclusions using a microscope equipped with a heating stage. These data, along with other literature values have been used in a stepwise multiple regression routine to generate a series of equations describing vapor-saturated solubility relations within the halite, sylvite and hydrohalite stability fields. These equations, together with a recently published equation for the ice stability field ( et al. , 1987), have been used to construct the complete vapor-saturated solubility surface in the NaCl-KCl-H 2 O ternary system. The diagram may be used in the interpretation of microthermometric data to determine the compositions of fluid inclusions approximated by the NaCl-KCl-H 2 O system. For the NaCl-H 2 O binary system, the ternary halite field expression reduces to Wt .% NaCl = 26.242 + 0.4928 + 1.42 2 - 0.223 3 + 0.04129 4 + 0.006295 5 - 0.001967 6 + 0.0001112 7 ( = T ° C /100, where 0.1° T ° C 801° C ) which describes halite solubilities along the three-phase halite + liquid + vapor (H + L + V) curve. Similarly, sylvite solubilities along the three-phase sylvite + liquid + vapor (S + L + V) curve are described by the equation Wt .% KC 1 = 21.886 + 20.28 - 9.603 2 + 4.078 3 - 0.8724 4 + 0.09174 5 - 0.003776 6 ( = T ° C /100, where -10.7° T ° C 770° C ). Solubility data obtained from synthetic fluid inclusions are in good agreement with recently published data for the KC1-H 2 O and NaCl-H 2 O binary systems but are at variance with some earlier works.
Bodnar Robert J.
Hall Donald L.
Sterner Michael S.
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