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Oceanic Anoxic Event 2 triggered by Kerguelen volcanism

Author

Listed:
  • C. A. Walker-Trivett

    (Penryn Campus
    Keyworth)

  • S. Kender

    (Penryn Campus
    Keyworth)

  • K. A. Bogus

    (Penryn Campus)

  • K. Littler

    (Penryn Campus)

  • T. Edvardsen

    (Penryn Campus)

  • M. J. Leng

    (Keyworth)

  • J. Lacey

    (Keyworth)

  • J. B. Riding

    (Keyworth)

  • I. L. Millar

    (Keyworth)

  • D. Wagner

    (Keyworth)

Abstract

Large Igneous Provinces (LIPs) are associated with global warming and carbon cycle perturbations during Oceanic Anoxic Event 2 (OAE2, ~94 Ma) and the Mid-Cenomanian Event (MCE, ~96.5 Ma). However, there is still no consensus on the role volcanism played as a trigger, or its source – previously ascribed to the Caribbean LIP or High Arctic LIP. Here, we use Mentelle Basin sedimentary mercury (Hg) concentrations to determine the timing of volcanism, and neodymium (Nd) and strontium (Sr) isotopes for sedimentary provenance. High Hg concentrations compared to Northern Hemisphere records, and a shift to radiogenic Nd isotopes, indicates Kerguelen LIP volcanic activity and plateau uplift occurred in the lead up to and within OAE2. Whilst we find limited evidence that a volcanic event caused the MCE, pulsed Hg spikes before and during OAE2 imply volcanic emissions were key in driving climate and carbon cycle changes and triggering OAE2.

Suggested Citation

  • C. A. Walker-Trivett & S. Kender & K. A. Bogus & K. Littler & T. Edvardsen & M. J. Leng & J. Lacey & J. B. Riding & I. L. Millar & D. Wagner, 2024. "Oceanic Anoxic Event 2 triggered by Kerguelen volcanism," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49032-3
    DOI: 10.1038/s41467-024-49032-3
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    References listed on IDEAS

    as
    1. Sev Kender & Kara Bogus & Gunver K. Pedersen & Karen Dybkjær & Tamsin A. Mather & Erica Mariani & Andy Ridgwell & James B. Riding & Thomas Wagner & Stephen P. Hesselbo & Melanie J. Leng, 2021. "Paleocene/Eocene carbon feedbacks triggered by volcanic activity," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Alyson M. Thibodeau & Kathleen Ritterbush & Joyce A. Yager & A. Joshua West & Yadira Ibarra & David J. Bottjer & William M. Berelson & Bridget A. Bergquist & Frank A. Corsetti, 2016. "Mercury anomalies and the timing of biotic recovery following the end-Triassic mass extinction," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    3. Hironao Matsumoto & Rodolfo Coccioni & Fabrizio Frontalini & Kotaro Shirai & Luigi Jovane & Ricardo Trindade & Jairo F. Savian & Junichiro Kuroda, 2022. "Mid-Cretaceous marine Os isotope evidence for heterogeneous cause of oceanic anoxic events," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
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