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Development of Detachment Folds on Syn-orogenic Sequences Including Salt LayersNormal access

Authors: O. Pla, J.A. Muñoz, O. Ferrer, E. Roca and O. Gratacós
Event name: 77th EAGE Conference and Exhibition - Workshops
Session: WS04 - What is Up in Fold-and Thrust Belts?
Publication date: 01 June 2015
DOI: 10.3997/2214-4609.201413490
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 4.72Mb )
Price: € 20

The southern Pyrenean foreland basin is formed by a thick syn-orogenic sequence that includes several evaporitic layers with salt that are involved in the fold-and-thrust belt. The Oliola anticline is a detachment fold probably developed at the southern pinch-out of the syn-orogenic Cardona salt unit that also involves younger syn-contractional evaporitc unit (Barbastro Fm.). Based on this natural analogue and using an experimental approach (sandbox models) we propose a new kinematic model for the development of detachment folds with multilayered evaporites in the Ebro basin. Analogue modelling of detachment folds suggests a new scenario for diapirs formation in compressional tectonic settings.

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