Mg/Ca Ratios in Synthetic Low-Magnesium Calcite: An Experimental Investigation

Minerals

Aleksey Sadekov¹  Aleksandra Novak²  Angel Jimenez²  Rinat I. Gabitov²  Jac J. Varco³  Andrew Dygert³  Jeremy M. Weremeichik⁴  Rooban Venkatesh K. G. Thirumalai⁵ 

[1] ARC Centre of Excellence for Coral Reef Studies, The University of Western Australia, Crawley, WA 6009, Australia;Department of Geosciences, Mississippi State University, Mississippi State, MS 39762, USA;Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762, USA;Independent Researcher, Mount Arlington, NJ 07856, USA;Institute for Imaging & Analytical Technologies, Mississippi State University, Mississippi State, MS 39762, USA;

关键词: low-magnesium;    calcite;    Mg/Ca;    partition coefficient;   

DOI  :  10.3390/min11111158

来源: DOAJ

【 摘 要 】

The work presented sought to determine the effects of Mg/Ca ratios in solution have on Mg partitioning (K^Mg) 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 K^Mg 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.

【 授权许可】

Unknown