Strontium behavior in the aragonite-calcite transformation: An experimental study at 40-98°C

A. Katz*, E. Sass, A. Starinsky, H. D. Holland

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

234 Scopus citations

Abstract

The behavior of strontium during the replacement of aragonite by calcite, in a closed system between 40°C and 98°C, has been experimentally investigated. The experiments were conducted in CaCl2 solutions, with and without NaCl. The distribution coefficient of strontium in calcite (λSr2+C) was found to be affected only slightly by temperature changes, and almost insignificantly by the presence of NaCl. λSr2+C values at 0.01 mCa2+ (its concentration in normal sea water) are: 0.055 at 40°C and 0.058 at 98°C. These results indicate that the low (around 500 ppm) concentration of strontium in ancient limestones could have been brought about by aragonite-to-calcite transformation in a system open to sea water, and are not necessarily indicative of replacement in fresh waters.

Original languageEnglish
Pages (from-to)481-496
Number of pages16
JournalGeochimica et Cosmochimica Acta
Volume36
Issue number4
DOIs
StatePublished - Apr 1972

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