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Bending-related faulting and mantle serpentinization at the Middle America trench

Author

Listed:
  • C. R. Ranero

    (GEOMAR and SFB574)

  • J. Phipps Morgan

    (GEOMAR and SFB574)

  • K. McIntosh

    (University of Texas at Austin)

  • C. Reichert

    (BGR, Bundesanstalt für Geowissenschaften and Rohstoffe)

Abstract

The dehydration of subducting oceanic crust and upper mantle has been inferred both to promote the partial melting leading to arc magmatism and to induce intraslab intermediate-depth earthquakes, at depths of 50–300 km. Yet there is still no consensus about how slab hydration occurs or where and how much chemically bound water is stored within the crust and mantle of the incoming plate. Here we document that bending-related faulting of the incoming plate at the Middle America trench creates a pervasive tectonic fabric that cuts across the crust, penetrating deep into the mantle. Faulting is active across the entire ocean trench slope, promoting hydration of the cold crust and upper mantle surrounding these deep active faults. The along-strike length and depth of penetration of these faults are also similar to the dimensions of the rupture area of intermediate-depth earthquakes.

Suggested Citation

  • C. R. Ranero & J. Phipps Morgan & K. McIntosh & C. Reichert, 2003. "Bending-related faulting and mantle serpentinization at the Middle America trench," Nature, Nature, vol. 425(6956), pages 367-373, September.
    • Handle: RePEc:nat:nature:v:425:y:2003:i:6956:d:10.1038_nature01961
    DOI: 10.1038/nature01961
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    Cited by:

    1. Stefan Farsang & Marion Louvel & Chaoshuai Zhao & Mohamed Mezouar & Angelika D. Rosa & Remo N. Widmer & Xiaolei Feng & Jin Liu & Simon A. T. Redfern, 2021. "Deep carbon cycle constrained by carbonate solubility," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    2. N. Zamora & A. Babeyko, 2016. "Tsunami potential from local seismic sources along the southern Middle America Trench," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 901-934, January.
    3. N. Zamora & A. Y. Babeyko, 2016. "Tsunami potential from local seismic sources along the southern Middle America Trench," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 901-934, January.

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