Freezing point depression of NaCl-KCl-H 2 O solutions

Hall, Donald L.; Sterner, S. Michael; Bodnar, Robert J.

doi:10.2113/gsecongeo.83.1.197

Cited by 512 publications

(224 citation statements)

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“…The comparison between KC1 and NaCl solu tions is performed under the condition of the same molalities for high and low-temperature KCl solutions with those for NaCl solutions based on the following observation. Freezing point depression (0°-freezing point) for KCI solu tion shows almost the same value as that for NaC1 solution when these solutions are of the same molality; the equation for pure NaCI solu tion (equation (1) in Potter et al, 1978) com pared with experimental values for KC1 + NaCI solutions (Hall et al, 1988) shows good agree ment, within ± 10 residual %. The largest discrepancy is found to be 0.309 mole/kg (1.52 wt%) for 3.260 mole/kg (19.55 wt%) pure KCl solution at the eutectic temperature.…”

Section: Effect Of Aqueous Kclmentioning

confidence: 55%

Mixing diagrams for hydrothermal solutions: Applications to interpretation of fluid inclusion data of hydrothermal ore deposits in Japan.

Shibue

1991

Geochem. J.

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Temperature-chloride mixing diagrams at 500 and 1000 bars, and at vapor-saturated pressures, are calculated in order to demonstrate the mixing behavior of saline (up to 40 NaCI wt%) high-temperature solutions with 1 wt% low-temperature solutions, with the results applied to interpreting fluid inclusion data. The temperature of the initial saline solutions is 450°C at 500 bars, 600°C at 1000 bars, or 300°C at vapor-saturated pressures. The temperature of the diluent is 100° or 300°C at 500 and 1000 bars, and 100°C at the vapor-saturated pressure. Mixing diagrams at 500 and 1000 bars are recast onto the rela tion between homogenization temperature and chloride concentration of fluid inclusion using densities of NaCI solutions.Temperature-chloride mixing diagrams indicate that mixing of 40 wt% fluids with dilute solutions at 1000 bars is not linear, but shows a greater decrease in temperature with up to 3 wt% NaCI deviation. The deviations are larger (up to 9 wt%) with respect to homogenization temperature versus concentra tion relations. In contrast, mixing lines for 30 to 10 wt% initial fluids at 1000 bars and those for 40 to 10 wt% fluids at 500 bars are nearly linear with respect to temperature (or homogenization temperature) and NaCI concentration, within ± 3 wt% deviations. At vapor-saturated pressures, 300°C and 25 to 5 wt% initial solutions show nearly linear mixing relationships under the condition that vapor/liquid volume ratios are less than 1.Potassium chloride solutions show almost identical temperature-chloride relations with sodium chloride solutions, up to 325°C, 500 bars, and 6 mole/kg, when the molalities of saline and dilute solu tions are same for both solutes. The relations between homogenization temperature and concentration for KCl solutions show slightly smaller slopes than those for NaCI solutions.Application of these results to fluid inclusion data of the Ohe, Toyoha, and Fujigatani-Kiwada deposits in Japan indicates that high temperature and high salinity fluids (335°C and 6.3 wt% for the Ohe deposit; 325°C and 4.6 wt% for the Toyoha deposit; 360°C and 7.4 wt% for the Fujigatani Kiwada deposits) mixed with low temperature and low salinity solutions (221 °C and 1 .6 wt% for the Ohe deposit; 209°C and 0.0 wt% for the Toyoha deposit; 250°C and 1.9 wt% for the Fujigatani Kiwada deposits).

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Section: Effect Of Aqueous Kclmentioning

confidence: 55%

Mixing diagrams for hydrothermal solutions: Applications to interpretation of fluid inclusion data of hydrothermal ore deposits in Japan.

Shibue

1991

Geochem. J.

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“…L-type inclusions yielded first ice-melting temperatures from À29.1 to À23.4°C, lower than the temperature of À21.2°C and À22.9°C determined for the H 2 O-NaCl and H 2 O-NaCl-KCl systems, respectively (Hall et al, 1988). The lower ice-melting temperatures indicate the presence of other ions besides Na + and K + .…”

Section: Fluid Inclusionsmentioning

confidence: 62%

Magmatic–hydrothermal evolution of highly fractionated granites: Evidence from the Kuiqi miarolite in Fujian province, SE China

Bao

Shan

Yang

et al. 2016

Journal of Asian Earth Sciences

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“…Interpretation of the microthermometric data was carried out by a programme developed in the Visual Basic environment by the first author using the equations of [23][24][25][26], while the methane isochor calculations were done using the equation of state of [27] included in the FLINCOR software of [28]. The results were also checked with the help of the softwares ISOC and BULK [29].…”

Section: Methodsmentioning

confidence: 99%

Fluid inclusion studies in datolite of low grade metamorphic origin from a Jurassic pillow basalt series in northeastern Hungary

2012

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Abstract:The Jurassic pillow basalt blocks in the Szarvaskő Unit in the SW-Bükk Mountains are incorporated into an accretionary mélange of Cretaceous age which had been displaced from the Dinarides to NE-Hungary during the Alpine-Carpathian collision. The pillow basalt series is a part of an incomplete remnant of an ophiolite-like sequence from which ultramafic units and sheeted dikes are almost completely absent. At the studied Egerbakta quarry, closely packed pillow, pillow fragmented hyaloclastite breccia and peperitic facies of submarine basaltic volcanism were recognized. Peperitic facies was formed by local admixture of unconsolidated siliciclastic sediment into the basaltic lava. Basaltic pillows contains short and thin prehnite-chlorite-carbonate-quartz veins formed during the interaction of seawater with the cooling lava, as well as cross-cutting datolite-prehnite-quartzchlorite-albite bearing veins. Calcite in the short cooling cracks crystallised from upheated seawater at around 160 • C temperature and 0.5-0.6 kbar pressure (water depth of about 5-6 km). Datolite precipitations in veins can be classified into at least three different textural-morphological types but all of them contain methane bearing primary fluid inclusion assemblages, with variable methane/water ratios, suggesting an inhomogeneous entrapment from a heterogeneous aqueous-carbonic fluid. End member primary fluid inclusions contain aqueous liquid with methane rich vapour phase and apparently methane only inclusions characterized by liquid phase on room temperature. A combination of results from fluid inclusion microthermometry, Raman spectroscopy (used not only for phase identification but also for determination of salinities) and temperatures calculated from chlorite compositions, show that the precipitation of datolite had taken place from low salinity (0.2-2 NaCl equiv. mass%) aqueous-methane fluids under increasing temperature and pressure (from 160 to 210 • C, and from 0.6 to 1.1 kbar) conditions. The elevated pressures and temperatures in comparison to the submarine hydrothermal processes suggest that the datolite bearing mineral parageneses had been formed during the progression of Alpine very low grade metamorphic processes.

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Freezing point depression of NaCl-KCl-H 2 O solutions

Cited by 512 publications

References 0 publications

Mixing diagrams for hydrothermal solutions: Applications to interpretation of fluid inclusion data of hydrothermal ore deposits in Japan.

Mixing diagrams for hydrothermal solutions: Applications to interpretation of fluid inclusion data of hydrothermal ore deposits in Japan.

Magmatic–hydrothermal evolution of highly fractionated granites: Evidence from the Kuiqi miarolite in Fujian province, SE China

Fluid inclusion studies in datolite of low grade metamorphic origin from a Jurassic pillow basalt series in northeastern Hungary

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