Earth Sciences

The role of calcium in regulating marine phosphorus burial and atmospheric oxygenation

M. Zhao, S. Zhang, et al.

Discover how seawater calcium concentration influences marine phosphorus burial and atmospheric oxygenation in groundbreaking research by Mingyu Zhao, Shuang Zhang, Lidya G. Tarhan, Christopher T. Reinhard, and Noah Planavsky. This study unveils a novel connection between tectonic cycles and global phosphorus cycling, reshaping our understanding of Earth's systems.

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Abstract

This study investigates the role of seawater calcium concentration in regulating marine phosphorus burial and atmospheric oxygenation. Using diagenetic models coupled with a global carbon cycle model, the researchers found that calcium concentration strongly influences carbonate fluorapatite (CFA) formation, a key factor controlling global phosphorus cycling. Analysis of Cenozoic deep-sea sedimentary phosphorus speciation data supports the model's prediction that CFA formation is influenced by marine calcium concentrations. This work proposes a novel link between Phanerozoic tectonic cycles, seawater major-element composition, the marine phosphorus cycle, and atmospheric oxygen levels.

Publisher

Nature Communications

Published On

May 06, 2020

Authors

Mingyu Zhao, Shuang Zhang, Lidya G. Tarhan, Christopher T. Reinhard, Noah Planavsky

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