Mg/ca ratios in synthetic low-magnesium calcite: An experimental investigation

Jeremy M. Weremeichik, Rinat I. Gabitov, Aleksey Sadekov, Aleksandra Novak, Angel Jimenez, Rooban Venkatesh K.G. Thirumalai, Jac J. Varco, Andrew Dygert

Research output: Contribution to journalArticlepeer-review

Abstract

The work presented sought to determine the effects of Mg/Ca ratios in solution have on Mg partitioning (KMg ) between precipitated abiotic low-Mg calcite and solution. Experiments were set up so that Mg/Ca in precipitated abiotic calcite would match the Mg/Ca in planktonic foraminifera. This research intended to investigate the effect of Mg/Ca(Fluid) on KMg when the molar value of Mg/Ca(Fluid) was below 0.5, which is below the previously reported Mg/Ca range. The values of pH, salinity, and aqueous Mg/Ca were monitored during calcite precipitation, and Mg/Ca of calcite was determined at the end of experiments. Partition coefficients of Mg were evaluated as a ratio of Mg/Ca in calcite to the averaged ratio of aqueous Mg/Ca for each experiment.

Original languageEnglish
Article number1158
JournalMinerals
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2021

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