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Updated: Jan 25, 2026

Author Spotlight: Exploring Cellular Zinc Regulation Through ZnT1 Functionality
Published on: June 2, 2023
Acceleration of dolomitization by zinc in saline waters
Veerle Vandeginste1,2, Oliver Snell3, Matthew R Hall4,5
1School of Chemistry, University of Nottingham, University Park, NG7 2RD, Nottingham, UK. veerle.vandeginste@nottingham.ac.uk.
Abstract:
Dolomite (CaMg(CO3)2) plays a key role in the global carbon cycle. Yet, the chemical mechanisms that catalyze its formation remain an enigma. Here, using batch reactor experiments, we demonstrate an unexpected acceleration of dolomite formation by zinc in saline fluids, reflecting a not uncommon spatial association of dolomite with Mississippi Valley-type ores. The acceleration correlates with dissolved zinc concentration, irrespective of the zinc source tested (ZnCl2 and ZnO). Moreover, the addition of dissolved zinc counteracts the inhibiting effect of dissolved sulfate on dolomite formation. Integration with previous studies enables us to develop an understanding of the dolomitization pathway. Our findings suggest that the fluids' high ionic strength and zinc complexation facilitate magnesium ion dehydration, resulting in a dramatic decrease in induction time. This study establishes a previously unrecognized role of zinc in dolomite formation, and may help explain the changes in dolomite abundance through geological time.
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