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Transient marine euxinia at the end of the terminal Cryogenian glaciation

Author

Listed:
  • Xianguo Lang

    (Peking University
    Chinese Academy of Sciences)

  • Bing Shen

    (Peking University)

  • Yongbo Peng

    (Louisiana State University
    Shanghai Ocean University)

  • Shuhai Xiao

    (Virginia Tech)

  • Chuanming Zhou

    (Chinese Academy of Sciences)

  • Huiming Bao

    (Peking University
    Louisiana State University)

  • Alan Jay Kaufman

    (University of Maryland)

  • Kangjun Huang

    (Northwest University)

  • Peter W. Crockford

    (McGill University
    Weizmann Institute of Science
    Princeton University)

  • Yonggang Liu

    (Peking University)

  • Wenbo Tang

    (Arizona State University)

  • Haoran Ma

    (Peking University)

Abstract

Termination of the terminal Cryogenian Marinoan snowball Earth glaciation (~650–635 Ma) is associated with the worldwide deposition of a cap carbonate. Modeling studies suggest that, during and immediately following deglaciation, the ocean may have experienced a rapid rise in pH and physical stratification followed by oceanic overturn. Testing these predictions requires the establishment of a high-resolution sequence of events within sedimentary records. Here we report the conspicuous occurrence of pyrite concretions in the topmost Nantuo Formation (South China) that was deposited in the Marinoan glacial deposits. Sedimentary facies and sulfur isotope data indicate pyrite precipitation in the sediments with H2S diffusing from the overlying sulfidic/euxinic seawater and Fe (II) from diamictite sediments. These observations suggest a transient but widespread presence of marine euxinia in an ocean characterized by redox stratification, high bioproductivity, and high-fluxes of sulfate from chemical weathering before the deposition of the cap carbonate.

Suggested Citation

  • Xianguo Lang & Bing Shen & Yongbo Peng & Shuhai Xiao & Chuanming Zhou & Huiming Bao & Alan Jay Kaufman & Kangjun Huang & Peter W. Crockford & Yonggang Liu & Wenbo Tang & Haoran Ma, 2018. "Transient marine euxinia at the end of the terminal Cryogenian glaciation," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05423-x
    DOI: 10.1038/s41467-018-05423-x
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    Cited by:

    1. Huyue Song & Zhihui An & Qin Ye & Eva E. Stüeken & Jing Li & Jun Hu & Thomas J. Algeo & Li Tian & Daoliang Chu & Haijun Song & Shuhai Xiao & Jinnan Tong, 2023. "Mid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciation," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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