Ca and Sr isotope records support ocean acidification during end-Permian mass extinction

Jiuyuan Wang1, Andrew D Jacobson2, Hua Zhang3, Jahandar Ramezani4, Bradley B Sageman2, Matthew Hurtgen5, Samuel A Bowring6 and Shuzhong Shen7, (1)Yale University, Department of Earth and Planetary Science, New Haven, United States, (2)Northwestern University, Department of Earth, Environmental, and Planetary Sciences, Evanston, United States, (3)State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Nanjing, China, (4)MIT-EAPS, Cambridge, MA, United States, (5)Northwestern University, Department of Earth and Planetary Sciences, Evanston, United States, (6)MIT, Cambridge, MA, United States, (7)Nanjing University, School of Earth Sciences and Engineering, Nanjing, China