Articles | Volume 15, issue 4
https://doi.org/10.5194/se-15-477-2024
https://doi.org/10.5194/se-15-477-2024
Research article
 | 
05 Apr 2024
Research article |  | 05 Apr 2024

Extensional fault geometry and evolution within rifted margin hyper-extended continental crust leading to mantle exhumation and allochthon formation

Júlia Gómez-Romeu and Nick Kusznir

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Cited articles

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Brune, S., Heine, C., Perez-Gussinye, M., and Sobolev, V.: Rift migration explains continental margin asymmetry and crustal hyper-extension, Nat. Commun., 5, 4014, https://doi.org/10.1038/ncomms5014, 2014. 
Buck, W. R.: Flexural Rotation of Normal Faults, Tectonics, 7, 959–973, 1988. 
De Charpal, O., Guennoc, P., Montadert, L., and Roberts, D. G.: Rifting, crustal attenuation and subsidence in the Bay of Biscay, Nature, 275, 706–711, https://doi.org/10.1038/275706a0, 1978. 
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Short summary
We investigate the extensional fault geometry and its evolution during the stretching and thinning of continental crust and lithosphere leading to continental breakup. We focus on the fault-controlled processes that thin and rupture the final 10 km of continental crust at magma-poor margins prior to mantle exhumation. We show that isostatic fault rotation in response to extension is fundamental to understanding the formation of tectonic structures observed on seismic reflection data.