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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
Tags
seawater calcium concentration
marine phosphorus burial
atmospheric oxygenation
carbonate fluorapatite
Cenozoic deep-sea sediments
Phanerozoic tectonic cycles
global carbon cycle

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