Alkalinity control on the partition coefficients in lacustrine ostracodes from Australia

TitleAlkalinity control on the partition coefficients in lacustrine ostracodes from Australia
Publication TypeJournal Article
Year of Publication2010
AuthorsGouramanis C, De Deckker P
JournalGeology
Volume38
Pagination359-362
Abstract

The partition coefficients (KD) guiding the uptake of Mg and Sr in the low-Mg calcite valves of ostracodes in Australian saline lakes have been reviewed in line with new information on the bicarbonate content and the αMg/αCa of the ambient waters. Strongly alkaline and very high αMg/αCa (>>20) waters cause the partition coefficients of ostracodes to differ significantly from those found in other lakes with lower αMg/αCa values. Water salinity does not affect the uptake of Mg or Sr in ostracode valves, whereas the αHCO3– of the water strongly correlates to KD[Sr], with high αHCO3– resulting in a significant KD[Sr] decrease.