Titre
Formation of intracratonic basins by lithospheric shortening and phase changes: a case study from the ultra-deep East Barents Sea basin
Type
article
Institution
Externe
Périodique
Auteur(s)
Gac, Sebastien
Auteure/Auteur
Huismans Ritske, S.
Auteure/Auteur
Simon Nina, S. C.
Auteure/Auteur
Podladchikov Yuri, Y.
Auteure/Auteur
Faleide Jan, Inge
Auteure/Auteur
Liens vers les personnes
ISSN
0954-4879
Statut éditorial
Publié
Date de publication
2013
Volume
25
Numéro
6
Première page
459
Dernière page/numéro d’article
464
Langue
anglais
Notes
Times Cited: 0
0
0
Résumé
The origin of large subsidence in intracratonic basins is still under debate. We propose a new and self-consistent model for the formation of those basins, where lithospheric shortening/buckling triggers metamorphism and densification of crustal mafic heterogeneities. We use a forward thermo-mechanical finite element technique to evaluate this mechanism for the typical example of the East Barents Sea basin (EBB) where a very large and compensated subsidence, accommodating an up to 20-km-thick sediment succession, is observed. The lower crust in the dynamic model is modelled with petrologic-consistent densities for a wet mafic gabbroic composition that depend on pressure and temperature taking into account dehydration at high PT conditions. The model successfully explains the main characteristics of the EBB, notably the large anomalous and fast subsidence during the Late Permian-Early Triassic, its present-day geometry and the absence of a significant gravity anomaly.
PID Serval
serval:BIB_F2BDBF271CF0
Date de création
2015-10-03T11:34:10.605Z
Date de création dans IRIS
2025-05-21T06:51:16Z