Uranium Isotopes in Calcium Carbonate: A Possible Proxy for Paleo-pH and Carbonate Ion Concentration?

Xinming Chen1, Stephen J Romaniello1, Achim Dirk Herrmann2, Laura Wasylenki3 and Ariel D Anbar4, (1)Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States, (2)Louisiana State University, Baton Rouge, LA, United States, (3)Indiana University, Department of Geological Sciences, Bloomington, IN, United States, (4)Arizona State University, Department of Chemistry, Tempe, AZ, United States