Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/147731
Title: Deformation pattern around the conejera fault blocks (asturian basin, north iberian margin)
Author: Martínez Granado, Pablo
Tavani, Stefano
Carrera Garcia de Cortazar, Nuria
Muñoz De la Fuente, Josep Antoni
Keywords: Península Ibèrica
Astúries
Deformació de les roques
Geologia estructural
Iberian Peninsula
Asturias
Rock deformation
Structural geology
Issue Date: 1-Jul-2018
Publisher: (UB). (ICTJA). (IDEA). (UAB). (CSIC)
Abstract: The Asturian Basin is located on the coastline of the North Iberian Margin. This basin is dissected by long-lived E-, NE- and NW-striking faults that delineate a series of extensional fault blocks that became shortened during the Upper Cretaceous to Cenozoic Alpine convergence. In the Conejera cove, the NE-striking and SE-dipping Conejera Fault displays a remarkable example of contractional deformation, promoted by the mechanical contrast within the Lower to Middle Jurassic stratigraphic series. Field observations and structural analysis carried out in this study reveal: i) a first system of orthogonal cross-joints oblique to the Conejera Fault and other major onshore boundary faults, ii) a second system of meso-extensional faults parallel to the Conejera Fault, and developed by the reactivation and linkage of the orthogonal cross-joints and iii) a series of contractional folds, thrusts and pressure solution with a predominant NE to ENE trend. Observed relationships and structural analysis suggest an obliquity between the here inferred direction of the Late Jurassic-Early Cretaceous stretching (i.e. about N015E) and the onshore boundary faults, whereas the contractional structures are broadly parallel to the NE-striking Conejera Fault and suggest a roughly SSE- to SE-oriented Alpine convergence.
Note: Reproducció del document publicat a: https://doi.org/10.1344/GeologicaActa2018.16.3.19968
It is part of: Geologica Acta, 2018, vol. 16, num. 4, p. 357-373
URI: http://hdl.handle.net/2445/147731
Related resource: https://doi.org/10.1344/GeologicaActa2018.16.3.19968
ISSN: 1695-6133
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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