Ming-Yu Zhao, Ph.D
Mailing address: PO Box 208109, New Haven CT 06520-8109
Street address: 210 Whitney Ave., New Haven CT 06511
I study the evolution of Earth’s surface through petrographic and geochemical analyses of sedimentary rocks and modelling. Carbonates formed within seawater column record key information of ancient seawater condition. However, the link between carbonate record and seawater chemistry is not straightforward due to the complex sedimentary and diagenetic processes. By analysis elements and isotopes, I attempt to understand the linked sedimentary and diagenetic histories of primary marine carbonates. Authigneic carbonates formed within sediments pore water was invoked as a third major global carbon sink, but a clear method of distinguishing between the Earth’s two carbonates sinks is lacking. I try to solve this problem by link the geochemical compositions and formation processes of the two carbonate sinks. I’m currently working on a multicomponent diagenetic model for phosphorus cycle and authigenic carbonates. Seawater compositions varied in Earth’s history and bioturbation gradually increased in the Paleozoic. Through the model work, I hope to understand the influence of these changes on the phosphorus cycle and the formation of authigenic carbonates.