Magnesium correction to the Na K Ca chemical geothermometer

Geochimica et Cosmochimica Acta
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Abstract

Equations and graphs have been devised to correct for the adverse effects of magnesium upon the Na-K-Ca chemical geothermometer. Either the equations or graphs can be used to determine appropriate temperature corrections for given waters with calculated Na-K-Ca temperatures > 70°C and R < 50, where R = {Mg(Mg + Ca + K)} × 100 with cation concentrations expressed in equivalents. Waters with R > 50 are probably derived from relatively cool aquifers with temperatures approximately equal to the measured spring temperature, irrespective of much higher calculated Na-K-Ca temperatures.

Publication type Article
Publication Subtype Journal Article
Title Magnesium correction to the Na K Ca chemical geothermometer
Series title Geochimica et Cosmochimica Acta
DOI 10.1016/0016-7037(79)90147-9
Volume 43
Issue 9
Year Published 1979
Language English
Publisher Elsevier
Description 8 p.
First page 1543
Last page 1550
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