Isotopic fractionation accompanying CO2 hydroxylation and carbonate precipitation from high pH waters at The Cedars, California, USA

• Published in: Geochimica et cosmochimica acta Vol. 301; no. C; pp. 91 - 115
• Main Authors: Christensen, John N., Watkins, James M., Devriendt, Laurent S., DePaolo, Donald J., Conrad, Mark E., Voltolini, Marco, Yang, Wenbo, Dong, Wenming
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 15.05.2021; Elsevier
• Subjects: Alkaline springs; Aragonite; Calcite; Calcium isotopes; Carbon isotopes; CO2 hydroxylation; Kinetic isotope effects; Oxygen isotopes; Aragonite; Alkaline springs; Calcium isotopes; Kinetic isotope effects; CO2 hydroxylation; Oxygen isotopes; Calcite; Carbon isotopes

The Cedars ultramafic block hosts alkaline springs (pH > 11) in which calcium carbonate forms upon uptake of atmospheric CO2 and at times via mixing with surface water. These processes lead to distinct carbonate morphologies with “floes” forming at the atmosphere-water interface, “snow” of fine p...