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Volcanic evolution of an ultraslow-spreading ridge

Author

Listed:
  • H. H. Stubseid

    (University of Bergen)

  • A. Bjerga

    (University of Bergen)

  • H. Haflidason

    (University of Bergen)

  • L. E. R. Pedersen

    (University of Bergen)

  • R. B. Pedersen

    (University of Bergen)

Abstract

Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away from the rift valley. However, because quantitative age data of volcanic eruptions are lacking, constructing geological models for the evolution of ultraslow-spreading crust remains a challenge. In this contribution, we use sediment thicknesses acquired from ~4000 km of sub-bottom profiler data combined with 14C ages from sediment cores to determine the age of the ocean floor of the oblique ultraslow-spreading Mohns Ridge to reveal a systematic pattern of young volcanism outside axial volcanic ridges. Here, we present an age map of the upper lava flows within the rift valley of a mid-ocean ridge and find that nearly half of the rift valley floor has been rejuvenated by volcanic activity during the last 25 Kyr.

Suggested Citation

  • H. H. Stubseid & A. Bjerga & H. Haflidason & L. E. R. Pedersen & R. B. Pedersen, 2023. "Volcanic evolution of an ultraslow-spreading ridge," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39925-0
    DOI: 10.1038/s41467-023-39925-0
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    References listed on IDEAS

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    1. Richard F. Katz & Marc Spiegelman & Benjamin Holtzman, 2006. "The dynamics of melt and shear localization in partially molten aggregates," Nature, Nature, vol. 442(7103), pages 676-679, August.
    2. Henry J. B. Dick & Jian Lin & Hans Schouten, 2003. "An ultraslow-spreading class of ocean ridge," Nature, Nature, vol. 426(6965), pages 405-412, November.
    3. Rolf B. Pedersen & Hans Tore Rapp & Ingunn H. Thorseth & Marvin D. Lilley & Fernando J. A. S. Barriga & Tamara Baumberger & Kristin Flesland & Rita Fonseca & Gretchen L. Früh-Green & Steffen L. Jorgen, 2010. "Discovery of a black smoker vent field and vent fauna at the Arctic Mid-Ocean Ridge," Nature Communications, Nature, vol. 1(1), pages 1-6, December.
    4. H. N. Edmonds & P. J. Michael & E. T. Baker & D. P. Connelly & J. E. Snow & C. H. Langmuir & H. J. B. Dick & R. Mühe & C. R. German & D. W. Graham, 2003. "Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel ridge in the Arctic Ocean," Nature, Nature, vol. 421(6920), pages 252-256, January.
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