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

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Version: Final published version
Serval ID
serval:BIB_C515B671E755
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The importance of structural softening for the evolution and architecture of passive margins
Journal
Scientific reports
Author(s)
Duretz T., Petri B., Mohn G., Schmalholz S.M., Schenker F.L., Müntener O.
ISSN-L
2045-2322
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
6
Pages
38704
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
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
Yes
Create date
22/12/2016 14:32
Last modification date
20/08/2019 15:40
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