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The kaolinite shuttle links the Great Oxidation and Lomagundi events

Author

Listed:
  • Weiduo Hao

    (University of Alberta)

  • Kaarel Mänd

    (University of Alberta
    University of Tartu)

  • Yuhao Li

    (University of Alberta)

  • Daniel S. Alessi

    (University of Alberta)

  • Peeter Somelar

    (University of Tartu)

  • Mathieu Moussavou

    (University of Science and Technology of Masuku)

  • Alexander E. Romashkin

    (Karelian Science Centre)

  • Aivo Lepland

    (University of Tartu
    UiT The Arctic University of Norway
    Geological Survey of Norway (NGU))

  • Kalle Kirsimäe

    (University of Tartu)

  • Noah J. Planavsky

    (Yale University)

  • Kurt O. Konhauser

    (University of Alberta)

Abstract

The ~2.22–2.06 Ga Lomagundi Event was the longest positive carbon isotope excursion in Earth’s history and is commonly interpreted to reflect perturbations in continental weathering and the phosphorous cycle. Previous models have focused on mechanisms of increasing phosphorous solubilization during weathering without focusing on transport to the oceans and its dispersion in seawater. Building from new experimental results, here we report kaolinite readily absorbs phosphorous under acidic freshwater conditions, but quantitatively releases phosphorous under seawater conditions where it becomes bioavailable to phytoplankton. The strong likelihood of high weathering intensities and associated high kaolinite content in post-Great-Oxidation-Event paleosols suggests there would have been enhanced phosphorus shuttling from the continents into marine environments. A kaolinite phosphorous shuttle introduces the potential for nonlinearity in the fluxes of phosphorous to the oceans with increases in chemical weathering intensity.

Suggested Citation

  • Weiduo Hao & Kaarel Mänd & Yuhao Li & Daniel S. Alessi & Peeter Somelar & Mathieu Moussavou & Alexander E. Romashkin & Aivo Lepland & Kalle Kirsimäe & Noah J. Planavsky & Kurt O. Konhauser, 2021. "The kaolinite shuttle links the Great Oxidation and Lomagundi events," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23304-8
    DOI: 10.1038/s41467-021-23304-8
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