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Central role of detachment faults in accretion of slow-spreading oceanic lithosphere

Author

Listed:
  • J. Escartín

    (Marine Geosciences Group, CNRS Institut de Physique du Globe de Paris, 4 Place Jussieu, 75252 Paris Cedex 05, France)

  • D. K. Smith

    (Woods Hole Oceanographical Institute, Woods Hole, Massachusetts 02543, USA)

  • J. Cann

    (School of Earth and Environment, University of Leeds)

  • H. Schouten

    (Woods Hole Oceanographical Institute, Woods Hole, Massachusetts 02543, USA)

  • C. H. Langmuir

    (Harvard University, Cambridge, Massachusetts 02138, USA)

  • S. Escrig

    (Harvard University, Cambridge, Massachusetts 02138, USA)

Abstract

Oceanic lithospheric accretion at faults Oceanic detachment faults are associated with one of two contrasting modes of accretion at mid-ocean ridges and can accommodate extension for millions of years. The main mode of accretion has been thought to be symmetrical, dominated by magmatic processes with subsidiary high-angle faulting and the formation of abyssal hills on both flanks. The other is asymmetrical involving active detachment faults along at least one ridge flank. Escartin et al. present an examination of approximately 2,500 km of the mid-Atlantic ridge that reveals that asymmetrical accretion surprisingly occurs along half of the studied ridge section. Much of the variability in seafloor morphology, seismicity and basalt chemistry found along slow-spreading ridges may thus be attributed to the frequent involvement of detachment faults in oceanic lithospheric accretion.

Suggested Citation

  • J. Escartín & D. K. Smith & J. Cann & H. Schouten & C. H. Langmuir & S. Escrig, 2008. "Central role of detachment faults in accretion of slow-spreading oceanic lithosphere," Nature, Nature, vol. 455(7214), pages 790-794, October.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7214:d:10.1038_nature07333
    DOI: 10.1038/nature07333
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    Cited by:

    1. Thomas Theunissen & Ritske S. Huismans, 2022. "Mantle exhumation at magma-poor rifted margins controlled by frictional shear zones," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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