La discordancia de La Mesa (base de las Facies Utrillas) en el sinclinal de Polientes (Cretácico, Cuenca Vasco-Cantábrica)implicaciones tectónicas

  1. C. Peropadre 1
  2. J.F. Mediato 1
  3. P.P. Hernaiz 1
  4. A. Robador 2
  5. F.X. Solé
  6. Fernando Sarrionandía 3
  1. 1 Informes y Proyectos, S.A. (Inypsa)
  2. 2 Instituto Geológico y Minero de España (IGME)
  3. 3 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Any de publicació: 2012

Títol de l'exemplar: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Número: 13

Pàgines: 143-146

Tipus: Article

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Altres publicacions en: Geotemas (Madrid)

Resum

This paper focuses on the geometry of the Utrillas (Albian) basal unconformity in the south of Cantabria. It is a sharp angular unconformity, accounting for up to 1300 m of eroded sediments. In map view the unconformity erodes older sedimentary rocks westwards, however, its structural features show a prominent NE-SW to N-S trend, where the substrate of the surface is older northwards. Such a structural configuration is striking considering that an Early Cretaceous extensional depocenter is located northwards and consequently it might be uplifted during the Aptian-Albian times. Among the considered hypothesis, the best fitted is the occurrence of a transpressive inversion event during the Aptian-Albian. Aside of the implications regarding the model of basin evolution, the importance of such an inversion event for shale gas exploration in the Basque-Cantabrian basin is highlighted.

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