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Sequential faulting explains the asymmetry and extension discrepancy of conjugate margins

Author

Listed:
  • César R. Ranero

    (ICREA at CSIC, Barcelona Center for Subsurface Imaging, Instituto de Ciencias del Mar, CSIC, Passeig Marítim de la Barcelona 37-49, 08003, Barcelona, Spain)

  • Marta Pérez-Gussinyé

    (Royal Holloway, University of London)

Abstract

Faulting at the margins Rifted continental margins are the sites that record the thinning and break-up of continents to form new oceans. César Ranero and Marta Pérez-Gussinyé use seismic imaging to accurately measure fault extension at the conjugate West Iberia and Newfoundland margins, and compare this to crustal thinning. They use these observations to create a balanced kinematic model of rifting that resolves the extension discrepancy — in which crustal thinning appears to be greater than the extension caused by brittle faulting — by producing both fault-controlled crustal thinning, which progresses from a rift basin to the asymmetric structure, and extreme thinning of conjugate rifted margins.

Suggested Citation

  • César R. Ranero & Marta Pérez-Gussinyé, 2010. "Sequential faulting explains the asymmetry and extension discrepancy of conjugate margins," Nature, Nature, vol. 468(7321), pages 294-299, November.
    • Handle: RePEc:nat:nature:v:468:y:2010:i:7321:d:10.1038_nature09520
    DOI: 10.1038/nature09520
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