Cartografía geológica y estudio estructural del Sistema de Fallas Alpinas de Cabuérniga (Norte de Iberia)

  1. N. Heredia 1
  2. F. Martín-González 2
  3. P. Farias 3
  4. J. García-Sansegundo 3
  5. B. Gonzalo-Guerra 1
  6. D. Pedreira 3
  7. G. García-Davia 3
  8. G. Mateos-Herrero 3
  9. A.G. Flórez 3
  1. 1 Instituto Geológico y Minero de España (IGME)
  2. 2 Universidad Rey Juan Carlos
    info

    Universidad Rey Juan Carlos

    Madrid, España

    ROR https://ror.org/01v5cv687

  3. 3 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 79

Type: Article

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Abstract

The Cabuérniga Alpine Fault System runs along approximately 150 km with a predominantly E-O direction between the towns of Arriondas (Asturias) and Ramales de la Victoria (Cantabria), very close to the Cantabrian coast. In its eastern part, these faults affect Mesozoic rocks of the Basque-Cantabrian Region and have played in many cases as faults linked to the Permo-Mesozoic extension, subsequently reactivated as reverse faults during the Alpine uplift of the Cantabrian Mountains. In the western part, the faults cut the Paleozoic basement of the northern branch of the Ibero-Armorican Arch in the Canta- brian Zone, affected by a large number of Variscan thrusts with predominant E-W trends and by NW-SE late-Variscan faults. Some of these structures have been reactivated as normal faults during the Permo-Mesozoic and/or as reverse faults during the alpine shortening. In order to advance in the knowledge of the complex temporal and kinematic history of these faults and their relationship with the Permo-Mesozoic sedimentation and with the generation of mineral deposits, we conducted a new geological mapping at 1:25,000 scale as the basis for a detailed structural study. This mapping is based on the Continuous Digital Geological Map (GEODE) of the Cantabrian Mountains, complemented with detailed maps in different sectors. This contribution presents a synthesis of that cartography and six serial geological sections in N-S direction that illustrate the complex history of reactivations of this fault system.

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