Universidad de Zaragoza Repository

Resumen: The Olvena area (Sierras Marginales, southern Pyrenees) provides an outstanding example for studying the relationships between tectonics and sedimentation related to fold-and-thrust systems having shallow décollements. Stratigraphic and sedimentological features allow infer i) the relationship between Oligocene-Miocene locallysourced alluvial fans and a far-sourced wider fluvial system, and ii) the control exerted by tectonics on the stratigraphic architecture. Initially, uplift resulting from folding and thrusting in the Sierras Marginales precluded the entrance through this area into the Ebro basin of a wide fluvial system sourced in internal zones of the Pyrenean chain (including the Axial Zone). A subsiding area was created in the southern front of the Sierras where west-flowing alluvial fans generated, having their source areas in the rejuvenated reliefs. The subsequent cessation of movement of the tectonic structures permitted these reliefs to be subdued and the overpassing of the north-coming fluvial system that progressively covered a wider area. Sequential evolution and stratigraphic architecture evidence thrust emplacement geometry and chronology, including out-of-sequence reactivation of structures and the influence of evaporite flow along the décollement. Although these syn-tectonic deposits belong to the Ebro basin succession, its megasequential evolution differs from the general sequence established for the basin fill, highlighting the importance of differentiating the influence of near-coming sedimentary systems when interpreting basin-scale sequence stratigraphy.
Idioma: Inglés
DOI: 10.1344/GeologicaActa2015.13.4.3
Año: 2015
Publicado en: GEOLOGICA ACTA 13, 4 (2015), 297-308
ISSN: 1695-6133
Factor impacto JCR: 1.056 (2015)
Categ. JCR: GEOLOGY rank: 24 / 47 = 0.511 (2015) - Q3 - T2
Tipo y forma: Article (Published version)
Área (Departamento): Geodinámica Interna (Departamento de Ciencias de la Tierra)
Área (Departamento): Estratigrafía (Departamento de Ciencias de la Tierra)

You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

0
Exportado de SIDERAL (2016-07-26-14:37:29)

Este artículo se encuentra en las siguientes colecciones:
Articles > Artículos por área > Geodinámica Interna
Articles > Artículos por área > Estratigrafía

Visitas