Neoproterozoic cap dolostones, which ubiquitously overlie Marinoan glacial diamictites, may record marine and climatic paleo-environmental conditions at the termination of the largest glacial epoch in Earth's history. Many geochemical indices have been used to interpret cap dolostone formation in the context of extreme climate change in the aftermath of the Marinoan glaciation. However, there are significant debates about whether these geochemical data represent global signals or regional sedimentary and/or diagenetic processes. Here we analyzed cap dolostones from three different continental cratons for their Ca-isotope, Sr-isotope and trace element compositions in order to obtain new insights into formation of the Marinoan cap dolostone and post-Marinoan paleo-environmental conditions (
1.Nanjing Univ, Sch Earth Sci & Engn, Dept Earth Sci, State Key Lab Mineral Deposits Res, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China 2.Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06520 USA 3.Univ Melbourne, Sch Earth Sci, Parkville, Vic 3010, Australia 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation:
Wei, Guang-Yi,Hood, Ashleigh V. S.,Chen, Xi,et al. Ca and Sr isotope constraints on the formation of the Marinoan cap dolostones[J]. EARTH AND PLANETARY SCIENCE LETTERS,2019-01-01,511:202-212