The importance of structural softening for the evolution and architecture of passive margins

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_C515B671E755
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The importance of structural softening for the evolution and architecture of passive margins
Périodique
Scientific reports
Auteur(s)
Duretz T., Petri B., Mohn G., Schmalholz S.M., Schenker F.L., Müntener O.
ISSN-L
2045-2322
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
6
Pages
38704
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
Lithospheric extension can generate passive margins that bound oceans worldwide. Detailed geological and geophysical studies in present and fossil passive margins have highlighted the complexity of their architecture and their multi-stage deformation history. Previous modeling studies have shown the significant impact of coarse mechanical layering of the lithosphere (2 to 4 layer crust and mantle) on passive margin formation. We built upon these studies and design high-resolution (~100-300 m) thermo-mechanical numerical models that incorporate finer mechanical layering (kilometer scale) mimicking tectonically inherited heterogeneities. During lithospheric extension a variety of extensional structures arises naturally due to (1) structural softening caused by necking of mechanically strong layers and (2) the establishment of a network of weak layers across the deforming multi-layered lithosphere. We argue that structural softening in a multi-layered lithosphere is the main cause for the observed multi-stage evolution and architecture of magma-poor passive margins.

Pubmed
Open Access
Oui
Création de la notice
22/12/2016 15:32
Dernière modification de la notice
20/08/2019 16:40
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