How transform fault shear influences where detachment faults form near mid-ocean ridges - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2023

How transform fault shear influences where detachment faults form near mid-ocean ridges

Jana Schierjott
  • Fonction : Auteur
Mark Behn
  • Fonction : Auteur
Xiaochuan Tian
  • Fonction : Auteur
Thomas Morrow
  • Fonction : Auteur
Javier Escartín

Résumé

Oceanic detachment faults represent an end-member form of seafloor creation, associated with relatively weak magmatism at slow-spreading mid-ocean ridges. We use 3-D numerical models to investigate the underlying mechanisms for why detachment faults predominantly form on the transform side (inside corner) of a ridge-transform intersection as opposed to the fracture zone side (outside corner). One hypothesis for this behavior is that the slipping, and hence weaker, transform fault allows for the detachment fault to form on the inside corner, and a stronger fracture zone prevents the detachment fault from forming on the outside corner. However, the results of our numerical models, which simulate different frictional strengths in the transform and fracture zone, do not support the first hypothesis. Instead, the model results, combined with evidence from rock physics experiments, suggest that shear-stress on transform fault generates excess lithospheric tension that promotes detachment faulting on the inside corner.
Fichier principal
Vignette du fichier
ManuscriptForReviewers.pdf (12.57 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY NC SA - Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

Dates et versions

hal-04122000 , version 1 (08-06-2023)

Identifiants

Citer

Jana Schierjott, Garrett Ito, Mark Behn, Xiaochuan Tian, Thomas Morrow, et al.. How transform fault shear influences where detachment faults form near mid-ocean ridges. Scientific Reports, 2023, 13 (1), pp.9259. ⟨10.1038/s41598-023-35714-3⟩. ⟨hal-04122000⟩
14 Consultations
3 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More