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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
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Thermodynamic interpretation of Na-K-Ca geothermometer in the natural water system

Naotatsu Shikazono
Geochemical Journal, Vol. 10, No. 1, P. 47-50, 1976

ABSTRACT

A cation-chloride concentration diagram showing the stability of minerals in natural water system at elevated temperatures is constructed. The curves on this diagram showing the equilibrium between aqueous solution and minerals commonly occurring in nature generally satisfy the empirical Na-K-Ca relationship obtained by FOURNIER and TRUESDELL (1973). This indicates that the chemical composition of natural waters is largely controlled by minerals commonly occurring in nature.

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